[fix](trx-frontend-http): tidy up the map's filter bar

The bar explained itself in prose: "All bands visible by default" sat
between the chips and the next group, taking width the bar could not
spare and reading as a stray line of text. An "All" chip says the same
thing in a chip's width and gives the selection somewhere to be undone.

Band chips also came up dimmed at the very moment every band was on the
map -- an empty selection is no filter at all, so nothing is dimmed
until something is picked. The path toggles drop their "On"/"Off"
suffix, which cost most of a row and only repeated what their own
highlight already said; state moves to aria-pressed and the tooltip.

The rest is alignment. The rule dividing the buttons from the filters
is drawn on the button block's edge, and a centred block left it
floating as a stub beside a two-row bar; stacked, it lay down the left
of a block that sits underneath. The labels sat at their natural
widths, so each row's first control started somewhere different, and
the two pairs of phase buttons differed in width, so the groups after
them missed each other by four pixels. One gutter for every label, one
width for both pairs, and the search field moved last where it can take
the room the fixed-width groups leave.

The map layout test now covers the chips, the divider's height and the
rows' shared start.

Signed-off-by: Stan Grams <sjg@haxx.space>

.cargo/config.toml

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Enable CPU optimizations for better performance
 # Set target-cpu to native to use all available CPU features on the build machine
 

.devcontainer/devcontainer.json

@@ -0,0 +1,22 @@
+{
+  "name": "trx-rs SDK",
+  "image": "git.haxx.space/sjg/trx-rs/sdk:latest",
+  "workspaceFolder": "/work",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/work,type=bind",
+  "mounts": [
+    "source=trx-rs-sccache,target=/sccache,type=volume"
+  ],
+  "containerEnv": {
+    "RUSTC_WRAPPER": "sccache",
+    "CARGO_INCREMENTAL": "0",
+    "SCCACHE_DIR": "/sccache"
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "rust-lang.rust-analyzer",
+        "tamasfe.even-better-toml"
+      ]
+    }
+  }
+}

.gitea/workflows/ci.yml

@@ -0,0 +1,89 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# CI for the Docker-executor runner (VM). The lint, test and frontend jobs run
+# inside the shared trx-rs SDK image (container/Containerfile), which bakes in
+# the pinned Rust toolchain, Node.js, Chromium and all build dependencies. The
+# reuse job uses the upstream Docker action, which the Docker executor launches
+# as a sibling container.
+
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+  # sccache: shared compilation cache persisted on the runner host (see the
+  # -v mount in runner-config.example.yaml). CARGO_INCREMENTAL=0 because
+  # sccache cannot cache incremental artifacts.
+  RUSTC_WRAPPER: sccache
+  CARGO_INCREMENTAL: "0"
+  SCCACHE_DIR: /sccache
+  SCCACHE_CACHE_SIZE: "20G"
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    container: git.haxx.space/sjg/trx-rs/sdk:latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: rustfmt
+        run: cargo fmt --all -- --check
+      - name: clippy
+        run: cargo clippy --workspace --all-targets --all-features -- -D warnings
+      - name: sccache stats
+        if: always()
+        run: sccache --show-stats
+
+  test:
+    runs-on: ubuntu-latest
+    container: git.haxx.space/sjg/trx-rs/sdk:latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: cargo build --workspace --all-targets --locked
+      - name: Test
+        run: cargo test --workspace --locked
+      - name: sccache stats
+        if: always()
+        run: sccache --show-stats
+
+  frontend:
+    runs-on: ubuntu-latest
+    container: git.haxx.space/sjg/trx-rs/sdk:latest
+    defaults:
+      run:
+        working-directory: src/trx-client/trx-frontend/trx-frontend-http/frontend
+    steps:
+      - uses: actions/checkout@v4
+      - name: Cache npm downloads
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: npm-${{ runner.os }}-${{ hashFiles('src/trx-client/trx-frontend/trx-frontend-http/frontend/package-lock.json') }}
+          restore-keys: |
+            npm-${{ runner.os }}-
+      - name: Install locked frontend dependencies
+        run: npm ci
+      - name: Type-check
+        run: npm run typecheck
+      - name: Lint
+        run: npm run lint
+      - name: Test
+        run: npm test
+      # Chromium comes from the SDK image at the path the smoke test defaults
+      # to, so there is nothing to install here.
+      - name: Browser smoke test
+        run: npm run test:browser
+      - name: Verify generated assets
+        run: npm run verify-generated
+
+  reuse:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: fsfe/reuse-action@v5

.github/workflows/wiki.yml

@@ -1,39 +0,0 @@
-name: Sync docs to Wiki
-
-on:
-  push:
-    branches: [main]
-    paths:
-      - 'docs/**'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-
-jobs:
-  wiki:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Checkout wiki
-        uses: actions/checkout@v4
-        with:
-          repository: ${{ github.repository }}.wiki
-          path: wiki
-          token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Sync docs to wiki
-        run: |
-          rsync -av --delete --exclude='.git' docs/ wiki/
-          cd wiki
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add -A
-          if git diff --cached --quiet; then
-            echo "No wiki changes to commit."
-          else
-            git commit -m "Sync docs from ${GITHUB_SHA::8}"
-            git push
-          fi

.gitignore

@@ -21,6 +21,9 @@ Cargo.lock
 coverage/
 benchmarks/
 
+# Frontend dependencies
+**/node_modules/
+
 # Env
 .env
 .env.*

CONTRIBUTING.md

@@ -18,7 +18,7 @@ When contributing to the project, please follow these guidelines:
 - Use a maximum of 80 characters per line.
 - Use a blank line between the commit message and the body.
 - Sign your commits with `git commit -s`.
-- Explicitly mark LLM usage in commit messages with 'Co-authored-by:'.
+- Disclose AI/LLM assistance with an `Assisted-By:` trailer (see below).
 
 Use the format below for commit titles:
 [<type>](<crate>): <description>
@@ -39,3 +39,23 @@ Allowed types:
 - chore: build or maintenance changes
 
 Write isolated commits for each crate.
+
+## Attribution trailers
+
+This project follows the Linux kernel convention for crediting work.
+
+The `Co-Authored-By:` and `Co-Developed-By:` trailers name **people** who
+authored the change. They are reserved for humans, and every person named
+this way must also add their own `Signed-off-by:` line. Never use these
+trailers for tools, assistants, or bots.
+
+When a commit was produced with help from an AI assistant or LLM,
+disclose it with an `Assisted-By:` trailer naming the tool (and model,
+where relevant). The human committer remains the author of record and
+takes responsibility for the change through `Signed-off-by:`.
+
+Example:
+
+    Assisted-By: Claude Code (claude-opus-4)
+    Co-Authored-By: Jane Developer <jane@example.com>
+    Signed-off-by: Your Name <you@example.com>

Cargo.lock

@@ -2645,6 +2645,15 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.69"
@@ -3137,6 +3146,7 @@ dependencies = [
  "sgp4",
  "tokio",
  "tracing",
+ "ts-rs",
  "uuid",
 ]
 
@@ -3168,6 +3178,7 @@ dependencies = [
  "serde_json",
  "tokio",
  "trx-core",
+ "trx-protocol",
  "uuid",
 ]
 
@@ -3177,6 +3188,7 @@ version = "0.1.0"
 dependencies = [
  "actix-web",
  "actix-ws",
+ "base64",
  "brotli 7.0.0",
  "bytes",
  "dirs",
@@ -3193,6 +3205,7 @@ dependencies = [
  "trx-core",
  "trx-frontend",
  "trx-protocol",
+ "ts-rs",
  "uuid",
 ]
 
@@ -3236,6 +3249,7 @@ dependencies = [
  "serde",
  "serde_json",
  "trx-core",
+ "ts-rs",
 ]
 
 [[package]]
@@ -3260,6 +3274,7 @@ dependencies = [
 name = "trx-server"
 version = "0.1.0"
 dependencies = [
+ "base64",
  "bytes",
  "chrono",
  "clap",
@@ -3330,6 +3345,29 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "ts-rs"
+version = "12.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "756050066659291d47a554a9f558125db17428b073c5ffce1daf5dcb0f7231d8"
+dependencies = [
+ "thiserror 2.0.18",
+ "ts-rs-macros",
+ "uuid",
+]
+
+[[package]]
+name = "ts-rs-macros"
+version = "12.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38d90eea51bc7988ef9e674bf80a85ba6804739e535e9cab48e4bb34a8b652aa"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "termcolor",
+]
+
 [[package]]
 name = "typenum"
 version = "1.20.0"

Cargo.lock.license

@@ -1,3 +1,3 @@
 SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 
-SPDX-License-Identifier: BSD-2-Clause
+SPDX-License-Identifier: GPL-2.0-or-later

Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [workspace]
 members = [

FIX_PLAN.md

@@ -1,143 +0,0 @@
-# Fix Plan
-
-Current state analysis of trx-rs as of 2026-04-08.
-
-## Overall Assessment
-
-The codebase is in good shape. Clippy is clean, no `unsafe` code, no TODO/FIXME markers,
-robust error handling throughout. One broken test and several untested crates are the
-main weak spots.
-
----
-
-## P0 — Broken Test
-
-### 1. `test_toggle_ft8_decode` returns 500 instead of 200
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs:1016`
-
-**Root cause:** The handler `toggle_ft8_decode` (decoder.rs:353) requires
-`context: web::Data<Arc<FrontendRuntimeContext>>` for multi-rig state resolution.
-The test registers `state_rx` and `rig_tx` but not `context`, so actix-web returns 500
-(missing app data). A `make_context()` helper already exists at line 757 but is unused
-by this test.
-
-**Fix:** Add `.app_data(web::Data::new(make_context()))` to the test's `App` builder
-(line 1036-1041). ~1 line change.
-
-**Impact:** This is the only failing test in the entire suite (50 pass, 1 fail).
-
----
-
-## P1 — Test Coverage Gaps
-
-### 2. trx-aprs decoder — 0 tests (596 LOC)
-
-**Location:** `src/decoders/trx-aprs/src/lib.rs`
-
-Bell 202 AFSK demodulator + AX.25 HDLC frame parser + CRC-16 validation.
-No `#[cfg(test)]` module at all.
-
-**Suggested tests:**
-- CRC-16 computation on known frames
-- HDLC flag detection and bit-unstuffing
-- Full frame decode from synthetic AFSK audio (1200 baud sine pairs)
-- Rejection of corrupted frames (bad CRC, truncated)
-
-### 3. trx-decode-log — 0 tests (226 LOC)
-
-**Location:** `src/decoders/trx-decode-log/src/lib.rs`
-
-JSON Lines file writer with date-based rotation. Pure I/O wrapper.
-
-**Suggested tests:**
-- Write + read-back round-trip in a tempdir
-- Date rotation triggers new file creation
-- Flush error logging (mock writer)
-
-### 4. trx-reporting — partial tests (1,065 LOC across 2 files)
-
-**Location:** `src/trx-reporting/src/pskreporter.rs` (582 LOC),
-`src/trx-reporting/src/aprsfi.rs` (483 LOC)
-
-Both files have `#[cfg(test)]` modules but coverage is limited to serialization.
-Network behavior (reconnect, rate-limit, batching) is untested.
-
-**Suggested tests:**
-- PSKReporter UDP datagram encoding round-trip
-- APRS-IS login line formatting
-- Spot batching and dedup logic (unit-testable without network)
-
----
-
-## P2 — Code Quality
-
-### 5. `audio.rs` is 4,000 LOC
-
-**Location:** `src/trx-server/src/audio.rs`
-
-Houses all decoder task launchers (FT8, FT4, FT2, APRS, AIS, VDES, CW, WSPR, LRPT,
-WEFAX). Each launcher follows the same pattern. The file is coherent but large.
-
-**Suggested improvement:** Extract decoder launchers into a `decoders/` submodule
-within trx-server, one file per decoder family (e.g., `ftx.rs`, `aprs.rs`, `wefax.rs`).
-Keep the audio pipeline and capture logic in `audio.rs`.
-
-### 6. `scheduler.rs` is 1,585 LOC
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/scheduler.rs`
-
-Mixes grayline computation, timespan matching, satellite pass prediction, and the
-scheduler state machine. Well-tested but dense.
-
-**Suggested improvement:** Extract grayline and satellite pass logic into separate
-modules (these are pure functions with no HTTP dependencies).
-
----
-
-## P3 — Minor
-
-### 7. `#[allow(dead_code)]` in soapysdr backend (4 annotations)
-
-**Locations:**
-- `vchan_impl.rs:66,87` — `fixed_slot_count`, `process_pair`
-- `real_iq_source.rs:20` — `device`
-- `demod.rs:113` — lifetime anchor
-
-All documented as intentional (lifetime anchors / reserved capacity). No action needed
-unless the fields can be converted to `PhantomData` or `_`-prefixed without breaking
-semantics.
-
-### 8. FrontendRuntimeContext test helper duplication risk
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs:757`
-
-`make_context()` and `spawn_rig_responder()` are good helpers but only used by some
-tests. As new endpoint tests are added, ensure they consistently use these helpers to
-avoid repeating the `test_toggle_ft8_decode` bug.
-
----
-
-## Implementation Order
-
-```mermaid
-gantt
-    title Fix Plan
-    dateFormat X
-    axisFormat %s
-
-    section P0
-    Fix test_toggle_ft8_decode          :p0, 0, 1
-
-    section P1
-    Add trx-aprs tests                 :p1a, 1, 3
-    Add trx-decode-log tests            :p1b, 1, 2
-    Expand trx-reporting tests          :p1c, 1, 3
-
-    section P2
-    Split audio.rs decoder launchers    :p2a, 3, 5
-    Extract scheduler pure functions    :p2b, 3, 5
-```
-
-P0 is a one-line fix. P1 items are independent and can be parallelized. P2 items are
-refactors that should wait until P1 tests provide regression safety.

LICENSES/GPL-2.0-or-later.txt

@@ -0,0 +1,338 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
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+
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+
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+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Moe Ghoul>, 1 April 1989
+  Moe Ghoul, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

LICENSES/LicenseRef-APRS-Symbols.txt

@@ -0,0 +1,434 @@
+APRS symbol set (https://github.com/hessu/aprs-symbols)
+=========================================================
+
+Verbatim copy of the upstream COPYRIGHT.md, retrieved 2026-08-03 from
+https://github.com/hessu/aprs-symbols.  The set has no single SPDX license:
+individual symbols carry different terms, summarized below.  Attribution
+requirement from the upstream README: "If you use this symbol set, please
+provide a pointer to the source (http://github.com/hessu/aprs-symbols/)."
+
+---
+
+
+Copyright and licensing information
+======================================
+
+This is a collection of vectorized symbols for use on the APRS system.
+
+The copyright status of this collection is a bit complicated, since the
+symbols come from various sources, each having different copyright owners.
+
+Most of the vectorized symbols are loosely based on the low-resolution
+"standard" bitmap symbol set as distributed by Stephen Smith, WA8LMF.  That
+set is used by most APRS software around the world.  The low resolution of
+those symbols does not allow direct vector conversion, so I've drawn new
+symbols in a similar layout.  The vector versions try to mimic the original
+appearance and colours, with the intention of keeping the set recognizable
+and familiar to existing users.  In some cases the vector versions are
+probably similar enough to the originals, so that they cannot be considered
+"original work" by myself.  In some of these cases, the originals are
+probably also mimicking someone else's design.
+
+The original symbols do not come with any information on their licensing.
+They've been distributed with a lot of APRS software over time, but I don't
+know who designed which symbol originally. Most likely all of them are
+drawn by one of:
+
+  * Roger Barker, G4IDE, "original set provided with UI-View" (SK)
+  * Steve Dimse, KH4G, "U.S. customary set"
+  * Stephen Smith, WA8LMF
+
+The Adobe Illustrator (.ai) file contains a copy of the original bitmaps
+as a hidden layer, just for reference.
+
+Some symbols I obtained from other sources, such as Wikipedia. In those
+cases I picked SVG versions which allow commercial reuse (source known, and
+the work is placed on public domain, or with a CC license which allows
+adaptation and commercial reuse).
+
+Some symbols are vectorized versions of product or brand logos. The
+copyright of those is owned by the respective companies (Apple, Microsoft,
+Kenwood), and each of those may have some opinions on how the logos are
+used.  Please check for yourself if you can use them or not.
+
+In the list below I try to summarize the licensing status for each symbol.
+
+
+Shorthand notation for common licensing status
+-------------------------------------------------
+
+* *VEC-OH7LZB* - Vectorized by OH7LZB, based on original APRS symbol set
+  * Source of original bitmap: http://wa8lmf.net/aprs/APRS_symbols.htm
+  * Original designer of individual symbol unknown at this time, but one of:
+    * Roger Barker, G4IDE
+    * Steve Dimse, KH4G
+    * Stephen Smith, WA8LMF
+  * Vectorized versions are designed to look similar
+  * Licensing: Unknown
+* *OH7LZB* - Original vector design by Heikki Hannikainen, OH7LZB
+  * Different enough (by author's opinion) to make it a new original work,
+    instead of a copy of the old symbol
+  * License: CC BY-SA 2.0
+  * https://creativecommons.org/licenses/by-sa/2.0/
+
+
+Primary table
+----------------
+
+* /! - Police station
+  * VEC-OH7LZB
+* /# - Digipeater / Green star with D in middle
+  * VEC-OH7LZB
+* /$ - Telephone
+  * VEC-OH7LZB
+* /% - DX cluster
+  * VEC-OH7LZB
+* /& - HF gateway
+  * VEC-OH7LZB
+* /' - Small aircraft
+  * https://openclipart.org/detail/27182/topdown-airplane-view
+  * Author: Wirelizard (Brian Burger)
+  * With color and some other small tuning added by OH7LZB
+  * PD: https://openclipart.org/share
+* /( - Mobile satellite station
+  * OH7LZB
+* /) - Wheelchair, handicapped
+  * PD wheelchair symbol
+  * Vectorized from bitmap by OH7LZB
+* /* - Snowmobile
+  * https://openclipart.org/detail/15849/snowmobile
+  * Author: Mystica (https://openclipart.org/user-detail/mystica)
+  * PD: https://openclipart.org/share
+* /+ - Red Cross
+  * VEC-OH7LZB
+* /, - Boy Scouts
+  * VEC-OH7LZB
+* /- - House
+  * VEC-OH7LZB
+* /. - Red X
+  * VEC-OH7LZB
+* // - Red dot
+  * VEC-OH7LZB
+* /0 to /9 - Numbered circles
+  * VEC-OH7LZB
+* Fire
+  * http://commons.wikimedia.org/wiki/File:FireIcon.svg
+  * Author: Piotr Jaworski
+  * PD: I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
+* Tent
+  * https://openclipart.org/detail/174933/green-tent-by-stamps-174933
+  * Author: stamps
+  * PD: https://openclipart.org/share
+* Motorcycle
+  * http://commons.wikimedia.org/wiki/File:MUTCD_W8-15P.svg
+  * This file is in the public domain because it comes from the Manual on
+    Uniform Traffic Control Devices, sign number W8-15P, which states
+    specifically on page I-1 that: Any traffic control device design or
+    application provision contained in this Manual shall be considered to
+    be in the public domain. Traffic control devices contained in this
+    Manual shall not be protected by a patent, trademark, or copyright,
+    except for the Interstate Shield and any other items owned by FHWA.
+  * Colour version by OH7LZB
+* /= - Railroad engine
+  * http://commons.wikimedia.org/wiki/File:Icon_train.svg
+  * Author: http://en.wikipedia.org/wiki/User:Richtom80
+  * CC-BY-SA-2.5,2.0,1.0
+* /> - Car
+  * OH7LZB
+* /? - File server
+  * https://openclipart.org/detail/163717/file-server-by-lyte
+  * Author: lyte
+  * PD: https://openclipart.org/share
+* /@ - Hurricane predicted path
+  * VEC-OH7LZB
+* /A - Aid station
+  * VEC-OH7LZB
+* Mail (BBS)
+  * https://openclipart.org/detail/29268/yellow-mail-by-rg1024-29268
+  * Author: rg1024
+  * PD: https://openclipart.org/share
+* /C - Canoe
+  * https://openclipart.org/detail/179047/red-canoe-by-rambo-tribble-179047
+  * https://openclipart.org/detail/179041/canoe-paddle-by-rambo-tribble-179041
+  * Author: Rambo Tribble
+  * PD: I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
+* /E - Eyeball
+  * http://commons.wikimedia.org/wiki/File:Blue_eye.svg
+  * PD: "This file is from the Open Clip Art Library, which released it explicitly into the public domain"
+  * PD: https://openclipart.org/share
+* /F - Tractor
+  * https://openclipart.org/detail/191654/farm-tractor-by-tmjbeary-191654
+  * Author: tmjbeary
+  * PD: https://openclipart.org/share
+* /G - Grid square, 3 by 3
+  * VEC-OH7LZB
+* /H - Hotel
+  * VEC-OH7LZB
+* /I - TCP/IP
+  * VEC-OH7LZB
+* /K - School
+  * OH7LZB
+* /L - PC user
+  * OH7LZB
+* /M - Mac apple
+  * Apple
+* /N - NTS
+  * VEC-OH7LZB
+* /O - Hot air balloon
+  * OH7LZB
+* /P - Police
+  * OH7LZB
+* /R - RV
+  * OH7LZB
+* /S - Space Shuttle
+  * https://openclipart.org/detail/814/space-shuttle-by-johnny_automatic
+  * PD: Published by the NASA, in "The Brain in Space"
+* /T - SSTV
+  * https://openclipart.org/detail/48997/flat-screen-by-rg1024
+  * Author: rg1024
+  * Adjusted by OH7LZB
+  * PD: https://openclipart.org/share
+* /U - Bus
+  * OH7LZB
+* /V - ATV, amateur television
+  * https://openclipart.org/detail/48997/flat-screen-by-rg1024
+  * Author: rg1024
+  * Adjusted by OH7LZB
+  * PD: https://openclipart.org/share
+* /W - Wx, Weather service site
+  * VEC-OH7LZB
+* /X - Helicopter
+  * OH7LZB
+* /Y - Sailboat
+  * OH7LZB
+* /Z - Windows flag
+  * Microsoft
+* /[ - Human
+  * VEC-OH7LZB
+* /\ - DF triangle
+  * VEC-OH7LZB
+* /] - Mailbox, post office, letter
+* /^ - Large aircraft
+  * https://openclipart.org/detail/183204/plane-red-by-sketchartist-183204
+  * Author: SketchArtist
+  * PD: https://openclipart.org/share
+* /_ - Weather station
+  * VEC-OH7LZB
+* /` - Satellite dish
+  * OH7LZB
+* /a - Ambulance
+  * OH7LZB
+* /b - Bicycle
+  * http://commons.wikimedia.org/wiki/File:Bicycle_evolution-numbers.svg
+  * Author: Wikipedia user: Al2
+  * CC BY 3.0
+* /c - Incident command post
+  * VEC-OH7LZB
+* /d - Fire station
+  * VEC-OH7LZB
+* /e - Horse, equestrian	
+  * https://openclipart.org/detail/142627/horse-riding-lesson-by-olku
+  * Author: OlKu
+  * PD: https://openclipart.org/share
+* /f - Fire truck
+  * OH7LZB
+* /g - Hang glider
+  * OH7LZB
+* /h - Hospital
+  * VEC-OH7LZB
+* /i - IOTA, islands on the air
+  * http://commons.wikimedia.org/wiki/File:Palm_Island_R.svg
+  * PI
+* /j - Jeep
+  * OH7LZB
+* /k - Truck
+  * OH7LZB
+* /l - Laptop
+  * OH7LZB
+* /m - Mic-E repeater
+  * VEC-OH7LZB
+* /n - Node, black bulls-eye
+  * VEC-OH7LZB
+* /o - Emergency operations center
+  * VEC-OH7LZB
+* /p - Dog(e)
+  * OH7LZB
+* /q - Grid square, 2 by 2
+  * VEC-OH7LZB
+* /r - Repeater tower
+  * OH7LZB
+* /s - Ship, power boat
+  * OH7LZB
+* /t - Truck stop
+  * VEC-OH7LZB
+* /u - Semi-trailer truck, 18-wheeler
+  * OH7LZB
+* /v - Van
+  * OH7LZB
+* /w - Water station
+  * VEC-OH7LZB
+* /x - X / Unix
+  * https://commons.wikimedia.org/wiki/File:X11.svg
+  * PD
+* /y - House, yagi antenna
+  * VEC-OH7LZB
+* /z - Shelter
+  * VEC-OH7LZB
+
+
+Secondary table
+------------------
+
+* Emergency
+  * VEC-OH7LZB
+* Numbered digipeater / Green star
+  * VEC-OH7LZB
+* Bank
+  * VEC-OH7LZB
+* Numbered gateway / Black diamond
+  * VEC-OH7LZB
+* Crash site
+  * OH7LZB
+* Cloudy
+  * OH7LZB
+* MEO
+  * VEC-OH7LZB
+* Snowflake
+  * http://commons.wikimedia.org/wiki/File:Snowflake_01.svg
+  * Author: Wikipedia user: Amada44
+  * Public Domain
+* Church
+  * VEC-OH7LZB
+* Girl Scout
+  * VEC-OH7LZB
+  * Looks slightly like the common USA girl scouts logos. Should be different
+    enough to not infringe on "Girl Scouts of the USA" copyrights.
+* Home (HF antenna)
+  * VEC-OH7LZB
+* Unknown position
+  * VEC-OH7LZB
+* Destination
+  * VEC-OH7LZB
+* Numbered circle
+  * VEC-OH7LZB
+
+* Petrol Station
+  * OH7LZB
+* Hail
+  * VEC-OH7LZB
+* Park
+  * VEC-OH7LZB
+* Gale Flag
+  * VEC-OH7LZB
+* Red car from above
+  * OH7LZB
+* Info Kiosk
+  * VEC-OH7LZB
+* Hurricane
+  * OH7LZB
+
+* Numbered white box
+  * VEC-OH7LZB
+* Snow blowing
+  * VEC-OH7LZB
+* Coast Guard
+  * VEC-OH7LZB
+* Drizzle
+  * VEC-OH7LZB
+* Smoke / Chimney
+  * VEC-OH7LZB
+* Freezing rain
+  * VEC-OH7LZB
+* Snow Shwr
+  * VEC-OH7LZB
+* Haze
+  * VEC-OH7LZB
+* Rain Shower
+  * VEC-OH7LZB
+* Lightning
+  * OH7LZB
+* "Kenwood radio"
+  * Kenwood logo, vectorized
+* "Lighthouse"
+  * CC BY-SA 2.0
+  * http://wiki.openstreetmap.org/wiki/File:Lighthouse.svg
+* Nav Buoy
+  * OH7LZB
+* Rocket
+  * http://www.clker.com/clipart-gglkuglug.html
+  * PD according to clker.com license
+* Parking
+  * VEC-OH7LZB
+
+* Earthquake, Restaurant
+  * VEC-OH7LZB
+* Satellite
+  * OH7LZB
+* Thunderstorm
+  * OH7LZB
+* Sunny
+  * OH7LZB
+* VORTAC, Numbered WXS
+  * VEC-OH7LZB
+* Pharmacy Rx
+  * OH7LZB
+* Wall Cloud
+  * OH7LZB
+* Numbered plane
+  * https://openclipart.org/detail/183204/plane-red-by-sketchartist-183204
+  * Author: SketchArtist
+  * PD: https://openclipart.org/share
+* Numbered WX Station
+  * VEC-OH7LZB
+* Rain
+  * Source: http://commons.wikimedia.org/wiki/File:Heavy-rain-shower-transparent.svg
+  * Author: Wikipedia user: Peepo
+  * Public Domain
+  * With modifications by OH7LZB
+
+* Numbered diamond
+  * VEC-OH7LZB
+* Dust blowing
+  * NA
+* Numbered civil defence
+  * VEC-OH7LZB
+* DX spot
+  * VEC-OH7LZB
+* Sleet
+  * NA
+* Funnel Cloud
+  * NA
+* Gale
+  * VEC-OH7LZB
+* Store
+  * https://openclipart.org/detail/89299/cart-medium-by-martins.bruvelis
+  * Author: martins.bruvelis
+  * Public Domain
+  * Adjustments by OH7LZB
+* Numbered black box
+  * VEC-OH7LZB
+* Work zone / Excavator
+  * Based on http://www.clker.com/clipart-292480.html PNG version
+  * Vectorized and colors adjusted by OH7LZB
+  * PD according to clker.com documentation, uploader KURSVEIAL
+* SUV
+  * OH7LZB
+* Milepost, Numbered triangle, Circle sm
+  * VEC-OH7LZB
+* Partly cloudy
+  * OH7LZB
+
+* Restrooms, Numbered boat
+ * VEC-OH7LZB
+* Tornado (also used in Funnel cloud, Skywarn)
+  * https://openclipart.org/detail/104887/tornado-by-laabadon
+  * Author: Laabadon
+  * Public Domain
+* Numbered truck
+  * OH7LZB
+* Numbered van
+  * OH7LZB
+* Flooding
+  * NA
+* Sky warn, Numbered shelter, fog
+  * VEC-OH7LZB

LICENSES/MIT.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

LICENSES/OFL-1.1.txt

@@ -0,0 +1,43 @@
+SIL OPEN FONT LICENSE
+
+Version 1.1 - 26 February 2007
+
+PREAMBLE
+
+The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+
+"Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting, or substituting — in part or in whole — any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment.
+
+"Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission.
+
+5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.
+
+TERMINATION
+
+This license becomes null and void if any of the above conditions are not met.
+
+DISCLAIMER
+
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.

README.md

@@ -5,7 +5,7 @@
 
 A modular amateur radio control stack written in Rust.
 
-[![License](https://img.shields.io/badge/license-BSD--2--Clause-blue.svg)](LICENSES)
+[![License](https://img.shields.io/badge/license-GPL--2.0--or--later-blue.svg)](LICENSES)
 
 </div>
 
@@ -64,9 +64,15 @@ brew install soapysdr
 ```
 </details>
 
-See [Build Requirements](https://github.com/sgrams/trx-rs/wiki/User-Manual#build-requirements)
+See [Build Requirements](https://git.haxx.space/sjg/trx-rs/wiki/User-Manual#build-requirements)
 in the wiki for details on each library.
 
+> **Note:** `cmake` is required even when a system Opus library is installed.
+> The `audiopus_sys` crate probes for Opus via `pkg-config`; if it is not found
+> (or `pkg-config` is unavailable), it falls back to compiling a vendored copy
+> of Opus with CMake. A missing `cmake` therefore fails the build with
+> `is cmake not installed?` rather than a missing-Opus error.
+
 ### 2. Build
 
 ```bash
@@ -127,12 +133,18 @@ a unified set of frontends.
 
 | Resource | Description |
 |----------|-------------|
-| [User Manual](https://github.com/sgrams/trx-rs/wiki/User-Manual) | Configuration, features, and usage |
-| [Architecture](https://github.com/sgrams/trx-rs/wiki/Architecture) | System design, crate layout, data flow, and internals |
-| [Optimization Guidelines](https://github.com/sgrams/trx-rs/wiki/Optimization-Guidelines) | Performance guidelines for the real-time DSP pipeline |
-| [Planned Features](https://github.com/sgrams/trx-rs/wiki/Planned-Features) | Roadmap and design notes |
+| [User Manual](https://git.haxx.space/sjg/trx-rs/wiki/User-Manual) | Configuration, features, and usage |
+| [Architecture](https://git.haxx.space/sjg/trx-rs/wiki/Architecture) | System design, crate layout, data flow, and internals |
+| [Optimization Guidelines](https://git.haxx.space/sjg/trx-rs/wiki/Optimization-Guidelines) | Performance guidelines for the real-time DSP pipeline |
+| [Planned Features](https://git.haxx.space/sjg/trx-rs/wiki/Planned-Features) | Roadmap and design notes |
 | [Contributing](CONTRIBUTING.md) | Commit conventions, workflow, and code style |
 
 ## License
 
-BSD-2-Clause. See [`LICENSES`](LICENSES) for bundled third-party license files.
+GPL-2.0-or-later. See [`LICENSES`](LICENSES) for the full license text and
+bundled third-party license files. Bundled third-party components retain their
+original licenses: Leaflet is BSD-2-Clause, DSEG is OFL-1.1, and opus-decoder
+is MIT. The APRS symbol sprites come from
+[hessu/aprs-symbols](https://github.com/hessu/aprs-symbols); their per-symbol
+copyright status is catalogued in
+[`LICENSES/LicenseRef-APRS-Symbols.txt`](LICENSES/LicenseRef-APRS-Symbols.txt).

REUSE.toml

@@ -0,0 +1,74 @@
+version = 1
+
+# Project-owned files without an in-file SPDX header (docs, config,
+# repo metadata, logos, and bespoke web assets).
+[[annotations]]
+path = [
+    ".gitattributes",
+    ".gitignore",
+    "CLAUDE.md",
+    "CONTRIBUTING.md",
+    "README.md",
+    "trx-rs.toml.example",
+    "docs/**",
+    "aidocs/**",
+    "container/**",
+    ".devcontainer/**",
+    "src/decoders/trx-ftx/README.md",
+    "src/decoders/trx-wxsat/README.md",
+    "assets/trx-logo.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/trx-favicon.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/trx-logo.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/bandplan.json",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/**",
+    "src/trx-client/trx-frontend/trx-frontend-http/frontend/package.json",
+    "src/trx-client/trx-frontend/trx-frontend-http/frontend/package-lock.json",
+    "src/trx-client/trx-frontend/trx-frontend-http/frontend/tsconfig.json",
+    "src/trx-client/trx-frontend/trx-frontend-http/frontend/tsconfig.worker.json",
+]
+SPDX-FileCopyrightText = "2026 Stan Grams <sjg@haxx.space>"
+SPDX-License-Identifier = "GPL-2.0-or-later"
+
+# Vendored Leaflet 1.9.4 (https://leafletjs.com), distributed under BSD-2-Clause.
+[[annotations]]
+path = [
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/leaflet.js",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/leaflet.css",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/layers.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/layers-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-icon.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-icon-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-shadow.png",
+]
+SPDX-FileCopyrightText = "2010-2023 Vladimir Agafonkin, 2010-2011 CloudMade"
+SPDX-License-Identifier = "BSD-2-Clause"
+
+# Vendored DSEG14 font (https://github.com/keshikan/DSEG), SIL OFL 1.1.
+[[annotations]]
+path = ["src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/dseg14-classic-latin-400-normal.woff2"]
+SPDX-FileCopyrightText = "2020 The DSEG Authors (https://github.com/keshikan/DSEG)"
+SPDX-License-Identifier = "OFL-1.1"
+
+# Vendored opus-decoder 0.7.11 browser build
+# (https://github.com/eshaz/wasm-audio-decoders), MIT.
+# SHA-256: fd73ee0a9c8a5e233c0b88234df14f46003ad89bb4ba27435bc8714db2a6dc62
+[[annotations]]
+path = ["src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/opus-decoder-0.7.11.min.js"]
+SPDX-FileCopyrightText = "2021-2025 Ethan Halsall"
+SPDX-License-Identifier = "MIT"
+
+# Vendored APRS symbol sprites (https://github.com/hessu/aprs-symbols), rev H.
+# The set has no single upstream license -- individual symbols carry different
+# terms, catalogued in LICENSES/LicenseRef-APRS-Symbols.txt.  Upstream asks that
+# users point back to https://github.com/hessu/aprs-symbols/.
+[[annotations]]
+path = [
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-0.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-1.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-2.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-0-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-1-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/aprs-symbols-24-2-2x.png",
+]
+SPDX-FileCopyrightText = "Heikki Hannikainen OH7LZB and the APRS symbol set authors (https://github.com/hessu/aprs-symbols)"
+SPDX-License-Identifier = "LicenseRef-APRS-Symbols"

aidocs/wip.md

@@ -0,0 +1,89 @@
+# Work In Progress — Project Improvement Areas
+
+Living tracker for engineering-infrastructure and hardening work identified
+during a July 2026 repo scan. The architecture-level backlog
+(`docs/Improvement-Areas.md`, P0–P3) is closed; these items focus on the
+tooling, robustness, and product concerns *around* the code.
+
+Status legend: **Done** · **In progress** · **Not started**
+
+| #  | Tier | Area | Status |
+|----|------|------|--------|
+| 1  | 1 — Infrastructure | Gitea Actions CI (fmt, clippy, test, REUSE) | In progress |
+| 2  | 1 — Infrastructure | Supply-chain & lint governance (cargo-deny/audit, MSRV, `[workspace.lints]`) | Not started |
+| 3  | 1 — Infrastructure | Release & deployment (container image, systemd units, binary releases) | Not started |
+| 4  | 2 — Robustness | Panic-resilience audit (harden ~495 unwrap/expect/panic sites) | Not started |
+| 5  | 2 — Robustness | `unsafe` SIMD safety scaffolding (`# Safety` docs, scalar↔SIMD equivalence tests) | Not started |
+| 6  | 2 — Robustness | DSP performance benchmarks (criterion, guard optimization gains) | Not started |
+| 7  | 2 — Robustness | Test-coverage measurement & gap-filling (llvm-cov; CAT backends, server tasks) | Not started |
+| 8  | 3 — Product | Frontend modularization & tooling (split `app.js` into ES modules, ESLint, JS tests) | Not started |
+| 9  | 3 — Product | Runtime observability (`/health`, Prometheus metrics) | Not started |
+| 10 | 3 — Product | Documentation freshness & consolidation (reconcile `docs/` with code) | Not started |
+
+## Tier 1 — Infrastructure gaps
+
+### 1. Gitea Actions CI
+No `.gitea/` / `.github/` / Woodpecker workflows exist, despite 768 tests.
+Add a workflow running `cargo fmt --check`, `cargo clippy -D warnings`,
+`cargo build`/`cargo test`, and REUSE lint on push + pull_request.
+System deps: `pkg-config cmake libopus-dev libasound2-dev libsoapysdr-dev`
+(the `soapysdr` backend is a default feature).
+
+Notes for the runner: assumes an `act_runner` registered with an
+`ubuntu-latest` label and GitHub-action proxying enabled (used by
+`actions/checkout`, `actions/cache`, `fsfe/reuse-action`). `clippy` runs
+with `-D warnings`; core crates are already clean, but if the first full
+`--all-features` run surfaces warnings in a less-travelled crate, fix them
+(preferred) or temporarily soften that step.
+
+### 2. Supply-chain & lint governance
+No `deny.toml`, `cargo audit`, `rustfmt.toml`/`clippy.toml`, declared MSRV,
+or `[workspace.lints]`. Add dependency auditing to CI, pin an MSRV
+(`rust-version`), and centralize lint policy in the workspace manifest.
+
+### 3. Release & deployment
+No `Dockerfile`, systemd units, packaging, or release automation (only
+`script/dummy-server.sh`). Add a container image, example systemd units for
+`trx-server`/`trx-client`, and a tag-triggered static-binary release job.
+
+## Tier 2 — Robustness & correctness
+
+### 4. Panic-resilience audit
+495 `unwrap()`/`expect()`/`panic!` sites, 11 in the hottest server files
+(`audio.rs`, `rig_task.rs`). A panic there can drop a rig task or the
+process. Convert hot-path panics to error propagation / graceful
+degradation; reserve `expect` for documented invariants.
+
+### 5. `unsafe` SIMD safety scaffolding
+13 `unsafe` blocks (AVX2 DSP). Add `# Safety` docs stating invariants,
+confirm runtime feature detection is tested, and add property tests
+asserting SIMD output matches the scalar fallback across random inputs.
+
+### 6. DSP performance benchmarks
+`docs/Optimization-Guidelines.md` documents NCO/polyphase/AVX2 gains, but no
+`criterion` benches guard them. Add benches for the demod/resample/FFT hot
+paths so regressions surface as numbers.
+
+### 7. Test-coverage measurement & gap-filling
+67 of 146 Rust files have no test module. Protocol is well covered; backends
+(CAT BCD/ASCII encoding), `listener.rs`, and `config.rs` look thin. Wire up
+`cargo-llvm-cov` and target the CAT backends and server tasks first.
+
+## Tier 3 — Product & maintainability
+
+### 8. Frontend modularization & tooling
+`app.js` is 8,760 lines and `map-core.js` 3,515, with no modules, linter, or
+tests. Keeping vanilla HTML+JS (no framework), split into native ES modules
+by concern, add ESLint + Prettier, and add `node:test` unit tests for pure
+logic (frequency formatting, unit math, decode parsing).
+
+### 9. Runtime observability
+`tracing` is set up, but there is no `/health` endpoint or metrics
+instrumentation. Add health/readiness endpoints and Prometheus-format
+metrics (decode rates, reconnects, audio underruns, per-rig state).
+
+### 10. Documentation freshness & consolidation
+`docs/` (13 files) is mostly dated 2026-03-29 while code moved into July, and
+mixes planning artifacts with reference docs. Reconcile against current code,
+separate "plans" from "reference," and fold still-true content into the
+canonical docs.

container/Containerfile

@@ -0,0 +1,68 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# trx-rs SDK / build image.
+#
+# Single source of truth for the build environment. Used two ways:
+#   * CI  — as the job container for the lint/test jobs (Docker executor).
+#   * Dev — run locally or via .devcontainer for a reproducible toolchain.
+#
+# Pinning the Rust version here (and in rust-toolchain.toml) means CI and every
+# developer share the exact same rustc/clippy, so "works locally, fails in CI"
+# cannot happen.
+FROM docker.io/library/debian:bookworm-slim
+
+# Keep in sync with rust-toolchain.toml.
+ARG RUST_VERSION=1.97.1
+ARG NODE_MAJOR=20
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:/usr/local/bin:/usr/bin:/bin
+
+# Build dependencies (mirror README's manual instructions).
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        ca-certificates curl git \
+        build-essential pkg-config cmake clang libclang-dev \
+        libopus-dev libasound2-dev libsoapysdr-dev chromium \
+    && rm -rf /var/lib/apt/lists/*
+
+# Node.js — JS-based actions (actions/checkout, actions/cache) run *inside*
+# the job container under the Docker executor, so node must be present.
+RUN curl -fsSL https://deb.nodesource.com/setup_${NODE_MAJOR}.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && rm -rf /var/lib/apt/lists/*
+
+# Pinned Rust toolchain, installed world-readable so any UID the runner or a
+# devcontainer uses can invoke cargo.
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+      | sh -s -- -y --no-modify-path \
+        --default-toolchain "${RUST_VERSION}" --profile minimal \
+        --component rustfmt --component clippy \
+    && chmod -R a+rwX "$RUSTUP_HOME" "$CARGO_HOME"
+
+# sccache — shared compilation cache. Enabled at build time via
+# RUSTC_WRAPPER (see the CI workflow and .devcontainer), not repo-wide, so
+# non-SDK builds are unaffected. musl build is static and runs anywhere.
+#
+# The release asset is per-architecture, so resolve it from `uname -m` rather
+# than hardcoding one triple: everything else in this image is arch-agnostic,
+# and a pinned x86_64 URL is what forces an amd64 build (and Rosetta or qemu)
+# on an arm64 host. `uname -m` reflects the build platform under plain
+# docker/podman build as well as buildx, unlike the BuildKit-only TARGETARCH.
+ARG SCCACHE_VERSION=0.8.2
+RUN set -eux; \
+    case "$(uname -m)" in \
+      x86_64)  sccache_arch=x86_64 ;; \
+      aarch64|arm64) sccache_arch=aarch64 ;; \
+      *) echo "unsupported architecture for sccache: $(uname -m)" >&2; exit 1 ;; \
+    esac; \
+    sccache_dist="sccache-v${SCCACHE_VERSION}-${sccache_arch}-unknown-linux-musl"; \
+    curl -fsSL "https://github.com/mozilla/sccache/releases/download/v${SCCACHE_VERSION}/${sccache_dist}.tar.gz" \
+      | tar -xz -C /tmp; \
+    install -m755 "/tmp/${sccache_dist}/sccache" /usr/local/bin/sccache; \
+    rm -rf /tmp/sccache-*
+
+WORKDIR /work

container/README.md

@@ -0,0 +1,193 @@
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# trx-rs SDK image
+
+A single container image that is the canonical build environment for trx-rs,
+used **both** by CI and by developers. It bakes in the pinned Rust toolchain
+(matching `rust-toolchain.toml`) and every build dependency, so the compiler
+and `clippy` are identical everywhere — no "works on my machine".
+
+| File | Purpose |
+|------|---------|
+| `Containerfile` | The SDK image (Debian + build deps + pinned Rust + Node + git). |
+| `runner-config.example.yaml` | Example act_runner config for the CI VM (Docker executor). |
+
+## Build and publish
+
+Nothing in the image is architecture-specific: the base image, the Debian build
+dependencies, Node.js, `rustup` and the `sccache` release all resolve per
+architecture, so the same `Containerfile` builds natively on x86_64 and arm64.
+
+Single architecture — the tag then only works on the architecture you built it
+on:
+
+```bash
+# from the repo root
+podman build -t git.haxx.space/sjg/trx-rs/sdk:latest container
+podman login git.haxx.space
+podman push git.haxx.space/sjg/trx-rs/sdk:latest
+```
+
+**Both architectures without emulation.** The CI runner is x86_64 and Apple
+Silicon developer machines are arm64, so `:latest` has to be a manifest list —
+a single-architecture tag makes the other side fall back to Rosetta or qemu.
+Build each half natively on a host of that architecture, then join them:
+
+```bash
+# on an x86_64 host
+podman build --platform linux/amd64 -t git.haxx.space/sjg/trx-rs/sdk:latest-amd64 container
+podman push git.haxx.space/sjg/trx-rs/sdk:latest-amd64
+
+# on an arm64 host
+podman build --platform linux/arm64 -t git.haxx.space/sjg/trx-rs/sdk:latest-arm64 container
+podman push git.haxx.space/sjg/trx-rs/sdk:latest-arm64
+
+# from either, once both are pushed
+podman manifest create git.haxx.space/sjg/trx-rs/sdk:latest \
+  git.haxx.space/sjg/trx-rs/sdk:latest-amd64 \
+  git.haxx.space/sjg/trx-rs/sdk:latest-arm64
+podman manifest push --all git.haxx.space/sjg/trx-rs/sdk:latest
+```
+
+Building both from one machine is a single command
+(`podman build --platform linux/amd64,linux/arm64 --manifest ...`), but the
+foreign half runs under emulation and is slow — the two-host flow above is
+what keeps every build native.
+
+Tag with the Rust version too (e.g. `:1.97.1`) if you want reproducible pins.
+Make the package **public** (Gitea → Packages → the image → Settings) so the CI
+runner and developers can pull it without credentials. If you keep it private,
+add `credentials:` under the workflow's `container:` and log the runner into the
+registry.
+
+Pushing a rebuilt image is not enough on its own: `:latest` is a moving tag, and
+act_runner reuses whatever it cached the first time unless `force_pull: true` is
+set (see `runner-config.example.yaml`). Without it the job log says
+`Image exists? true` and the run behaves as though the image were never
+rebuilt — a tool added to the `Containerfile` reads as missing from the image.
+Either set `force_pull`, or refresh the VM's copy by hand:
+
+```bash
+docker pull git.haxx.space/sjg/trx-rs/sdk:latest
+docker run --rm git.haxx.space/sjg/trx-rs/sdk:latest sccache --version
+```
+
+### macOS note
+
+Apple's `container` CLI builds through a BuildKit helper VM that is configured
+with Rosetta whether or not the target is x86_64, so `container build` fails
+with *"Rosetta is not installed"* on a clean machine. That is a property of the
+builder, not of this image — `container run` works natively without it. Either
+install Rosetta once (`softwareupdate --install-rosetta`, after which an arm64
+build still produces a native arm64 image), or build with Podman, whose arm64
+BuildKit needs no emulation.
+
+## Developer use
+
+Reproducible one-off build, no local toolchain needed:
+
+```bash
+podman run --rm -it -v "$PWD":/work -w /work \
+  git.haxx.space/sjg/trx-rs/sdk:latest \
+  cargo build --release
+```
+
+Or open the repo in the image via VS Code / JetBrains "Reopen in Container"
+(`.devcontainer/devcontainer.json` points at the same image).
+
+Building outside the container? `rust-toolchain.toml` pins the same rustc, so
+`rustup` installs the matching toolchain automatically.
+
+## CI use
+
+`.gitea/workflows/ci.yml` runs the `lint`, `test` and `frontend` jobs *inside*
+this image via the `container:` key, so they skip all setup and go straight to
+`cargo` and `npm`. The frontend job needs three things from the image beyond
+Rust: Node.js for the toolchain, Chromium at `/usr/bin/chromium` for the
+browser smoke test, and `cargo` — `npm run verify-generated` regenerates the
+Rust wire contracts before checking for drift.
+
+The `reuse` job stays on the upstream `fsfe/reuse-action` (a Docker action the
+Docker executor launches as a sibling container) — nothing REUSE-related is
+baked into the SDK, and it lints the whole repository, so no job runs its own
+licence check.
+
+## Compilation cache (sccache)
+
+The SDK image ships [`sccache`](https://github.com/mozilla/sccache). It is
+enabled via `RUSTC_WRAPPER=sccache` in CI and the devcontainer (not repo-wide,
+so plain `cargo` builds outside the SDK are unaffected).
+
+- **CI** persists the cache on the runner host — create the dir once:
+  `mkdir -p /var/cache/sccache`. It is bind-mounted into each job container at
+  `/sccache` (see `runner-config.example.yaml`), so cache survives across runs
+  and is shared between the lint/test jobs and both projects.
+- **Devcontainer** uses a named volume (`trx-rs-sccache`).
+- Check effectiveness with `sccache --show-stats` (the CI jobs print it).
+
+`CARGO_INCREMENTAL=0` is set wherever sccache is on, since sccache cannot cache
+incremental artifacts.
+
+## CI runner (Alpine / OpenRC)
+
+The runner uses the **Docker executor** (not the host executor): per-job
+container isolation and standard `ubuntu-latest` semantics. `act_runner` runs
+as an OpenRC service. Files provided:
+
+| File | Purpose |
+|------|---------|
+| `act_runner.openrc` | OpenRC init script (`supervise-daemon`, depends on docker). |
+| `act_runner.confd.example` | Per-instance `conf.d` settings for multi-runner hosts. |
+
+**Cap the thread budget.** In a VM, pin its vCPUs to specific host threads
+(libvirt/KVM):
+
+```xml
+<vcpu placement='static'>2</vcpu>
+<cputune>
+  <vcpupin vcpu='0' cpuset='4'/>
+  <vcpupin vcpu='1' cpuset='5'/>
+</cputune>
+```
+
+On bare metal, the `container.options: "--cpus=2"` and `capacity: 1` in
+`runner-config.example.yaml` already bound each runner.
+
+**Set it up:**
+
+```bash
+# 1. Docker + a dedicated user with socket access
+apk add docker docker-cli
+rc-update add docker default && rc-service docker start
+adduser -S -D -H -h /var/lib/act_runner act
+addgroup act docker
+
+# 2. act_runner binary (static Go build, works on musl)
+#    Upstream publishes per-architecture builds; pick the host's.
+case "$(uname -m)" in x86_64) arch=amd64 ;; aarch64) arch=arm64 ;; esac
+curl -fsSL -o /usr/local/bin/act_runner \
+  "https://gitea.com/gitea/act_runner/releases/download/v0.2.11/act_runner-0.2.11-linux-${arch}"
+chmod +x /usr/local/bin/act_runner
+
+# 3. Config + register one runner per project (scope keeps their jobs apart)
+install -Dm644 container/runner-config.example.yaml /etc/act_runner/trx-rs.yaml
+install -d -o act /var/lib/act_runner/trx-rs
+su act -s /bin/sh -c 'cd /var/lib/act_runner/trx-rs && \
+  act_runner register --no-interactive \
+    --instance https://git.haxx.space --token <TOKEN> \
+    --name trx-rs-ci \
+    --labels "ubuntu-latest:docker://catthehacker/ubuntu:act-latest"'
+
+# 4. OpenRC service (repeat the symlink+conf.d for the second project)
+install -m755 container/act_runner.openrc /etc/init.d/act_runner
+ln -s act_runner /etc/init.d/act_runner.trx-rs
+install -m644 container/act_runner.confd.example /etc/conf.d/act_runner.trx-rs
+rc-update add act_runner.trx-rs default
+rc-service act_runner.trx-rs start
+```
+
+Check it with `rc-service act_runner.trx-rs status` and
+`tail -f /var/log/act_runner.trx-rs.log`.

container/act_runner.confd.example

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Per-instance settings for an act_runner OpenRC service.
+# Copy to /etc/conf.d/<service-name>, e.g. /etc/conf.d/act_runner.trx-rs
+# (the name must match the /etc/init.d/ symlink).
+
+# User that runs the daemon. Must be a member of the `docker` group.
+runner_user="act"
+
+# Per-instance state dir (holds the .runner registration) and config file,
+# so two runners on one host stay independent.
+runner_dir="/var/lib/act_runner/trx-rs"
+runner_config="/etc/act_runner/trx-rs.yaml"

container/act_runner.openrc

@@ -0,0 +1,44 @@
+#!/sbin/openrc-run
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# OpenRC service for a Gitea act_runner (Docker executor) on Alpine.
+#
+# Install as /etc/init.d/act_runner (chmod +x). Single instance uses
+# /etc/act_runner/config.yaml. For one runner per project, symlink this script
+# and add a matching conf.d file:
+#
+#   ln -s act_runner /etc/init.d/act_runner.trx-rs
+#   cp container/act_runner.confd.example /etc/conf.d/act_runner.trx-rs
+#   $EDITOR /etc/conf.d/act_runner.trx-rs      # set runner_dir / runner_config
+#   rc-update add act_runner.trx-rs default
+#   rc-service act_runner.trx-rs start
+
+description="Gitea Actions runner"
+
+: "${runner_user:=act}"
+: "${runner_dir:=/var/lib/act_runner}"
+: "${runner_config:=/etc/act_runner/config.yaml}"
+
+command="/usr/local/bin/act_runner"
+command_args="daemon --config ${runner_config}"
+# No group given, so supplementary groups (incl. docker) are initialised.
+command_user="${runner_user}"
+directory="${runner_dir}"
+
+supervisor="supervise-daemon"
+respawn_delay=5
+respawn_max=0
+pidfile="/run/${RC_SVCNAME}.pid"
+output_log="/var/log/${RC_SVCNAME}.log"
+error_log="/var/log/${RC_SVCNAME}.log"
+
+depend() {
+	need docker
+	use net dns
+}
+
+start_pre() {
+	checkpath -d -m 0750 -o "${runner_user}" "${runner_dir}"
+	checkpath -f -m 0640 -o "${runner_user}" "${output_log}"
+}

container/runner-config.example.yaml

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Example act_runner config for the Docker-executor runner that lives in the
+# CI VM. This is NOT the SDK image — it configures the runner that launches
+# per-job containers (including the trx-rs SDK image referenced by the
+# workflow's `container:` key). Copy to the VM and pass with
+# `act_runner daemon --config`.
+
+log:
+  level: info
+
+runner:
+  file: .runner
+  # One concurrent job. With one runner per project on a 2-vCPU VM this keeps
+  # total CI usage at ~2 threads.
+  capacity: 1
+  timeout: 3h
+  # Docker executor: no ":host" suffix. Maps runs-on labels to base images
+  # (the workflow overrides these per job via `container:`).
+  labels:
+    - "ubuntu-latest:docker://catthehacker/ubuntu:act-latest"
+
+cache:
+  enabled: true
+
+container:
+  # Cap every job container's CPU so CI stays within the 2-thread budget even
+  # if capacity is raised later. The -v mount persists the sccache cache on the
+  # host (create it first: `mkdir -p /var/cache/sccache`), matching SCCACHE_DIR
+  # in the workflow.
+  options: "--cpus=2 -v /var/cache/sccache:/sccache"
+  # act_runner rejects every bind mount unless it is listed here — the default
+  # is an empty allowlist, so the -v above is dropped with only a
+  # "[...] is not a valid volume, will be ignored" line in the job log, and
+  # SCCACHE_DIR then points at a directory that does not outlive the job.
+  valid_volumes:
+    - /var/cache/sccache
+  # Reuse the host VM's Docker network for the built-in cache/artifact server.
+  network: "host"
+  # The workflow pulls the SDK image by the moving `:latest` tag. Without this
+  # the runner logs "Image exists? true" and reuses whatever it cached the
+  # first time, so pushing a rebuilt image has no effect until someone pulls
+  # on the VM by hand — which looks like the image is missing a tool it in
+  # fact has. The extra registry round-trip per job is nothing next to a build.
+  force_pull: true

docs/RDS-Tuning-Notes.md

@@ -1,9 +1,13 @@
-# RDS Parameter Tuning — Work in Progress
+# RDS Parameter Tuning Notes
+
+*Decoder tuning rationale for `trx-rds`. Recorded 2026-03-27; reflects the
+shipped parameter set. Kept as a reference for why these constants were chosen —
+not an open work item.*
 
 ## Goal
 Maximum sensitivity (weak-signal decode) with zero false positive PI decodes.
 
-## Changes Made
+## Changes Applied
 
 ### `src/decoders/trx-rds/src/lib.rs`
 

docs/frontend-architecture.md

@@ -0,0 +1,87 @@
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# Frontend architecture
+
+The HTTP frontend is a strict TypeScript application built with esbuild. Rust
+embeds deterministic JavaScript output from `assets/web/generated`; Cargo does
+not run Node.js or contact the network.
+
+## Runtime graph
+
+`frontend/src/bootstrap.ts` is the only first-party script referenced by the
+HTML document. Its imports establish startup order for WebGL support, shared UI
+services, decoder dispatch, the local Leaflet AIS adapter, and the application
+coordinator. Leaflet and the Opus decoder remain isolated vendored scripts.
+
+Feature entries under `frontend/src/plugins` are ESM bundles. The typed plugin
+loader imports them by feature group and keeps expensive map, scheduling, and
+decoder behavior lazy. Shared code is emitted as content-hashed chunks. The
+decode-history worker is an independent entry compiled against Web Worker
+globals.
+
+Dependencies point from application and feature code toward `core` and `api`.
+`api/generated.ts` contains Rust wire formats; `api/client.ts` and focused
+parsers validate untrusted HTTP, SSE, WebSocket, and worker data before it is
+used as typed application state.
+
+## Browser host contract
+
+Separate lazy bundles cannot share module instances with the stable application
+entry, so they use three intentional host namespaces:
+
+| Global | Purpose | Mutation policy |
+| --- | --- | --- |
+| `window.trx` | Application state, core services, and feature registrations | The root is frozen; lazy features may register only their documented `modules.*` service. |
+| `window.trxPluginRuntime` | Typed decoder registration and message dispatch | Runtime object is installed once; plugins register lifecycle handlers through its API. |
+| `window.trxUi` | Notifications, confirmations, tab accessibility, and control presentation | Installed once by `ui-core.ts`; consumers call methods but do not replace them. |
+
+`frontend/src/plugins/host.ts` declares the typed view of `window.trx.state`
+and `window.trx.core` that feature bundles consume. Feature entries import it
+instead of re-deriving the contract, so a service that moves out of the
+application entry is added in one place. Application state that a feature needs
+belongs in `trx.state`, and shared behavior belongs in `trx.core`; a feature
+that has to intercept application behavior registers a `modules.*` method the
+application calls, as the virtual-channel entry does for tuning, mode,
+bandwidth, and frequency display.
+
+The WebGL adapter exposes `createTrxWebGlRenderer`, `trxParseCssColor`,
+`trxHslToRgba`, and `trxClearCssColorCache` for the application bundle. Leaflet
+adds `L.TrxAisTrackSymbol` and `L.trxAisTrackSymbol` to the vendored Leaflet
+namespace.
+
+The following transitional properties are explicitly part of the lazy-feature
+host contract and are declared in `app.ts`: `lastSpectrumData`, `lastFreqHz`,
+`currentBandwidthHz`, `ft8BaseHz`, `getDecodeHistoryRetentionMs`,
+`applyDecodeHistoryRetention`, `getDecodeRigMeta`, `renderRdsOverlays`,
+`buildAisVesselUrl`, `trxScheduleUiFrameJob`,
+`takeSchedulerControlForDecoderDisable`, `navigateToTab`, `_syncRecorderState`,
+and `refreshRdsUi`. Optional callbacks owned by lazy features are
+`refreshCwTonePicker`, `updateFt8RfDisplay`, `clearSatPredictionDom`,
+`syncWefaxToggle`, `updateAisBar`, `updateVdesBar`, `updateAprsBar`,
+`updateFt8Bar`, `updateSatLiveState`, `applyCwAutoUi`, and
+`applyCwAutoUiFromServer`.
+
+This list is closed: new standalone mutable `window` properties are not an
+accepted integration mechanism. Extend an existing typed service or introduce
+an imported interface instead. Removing transitional properties as feature
+boundaries become directly importable remains preferable.
+
+## Build and verification
+
+The generated directory is removed before every build, preventing orphaned
+compatibility bundles. Stable feature entry names are allowlisted by the Rust
+asset manifest; shared chunks use content hashes. The generic Rust handler
+rejects unknown names and unsupported MIME types and serves embedded assets
+with compression, ETags, and immutable caching.
+
+CI installs from `package-lock.json`, caches only npm downloads, type-checks the
+window and worker environments separately, lints, runs unit and DOM tests,
+starts the application in Chromium, regenerates Rust contracts and bundles,
+checks for drift, and runs REUSE validation after generation.
+
+See `frontend/src/README.md` for local commands and
+`docs/ts-migration-plan.md` for the migration decisions and completion gates.

docs/frontend_improvements.md

@@ -7,7 +7,11 @@ trx-rs web frontend (`trx-frontend-http`). The frontend is a single-page
 application served as embedded static assets (gzip-compressed with ETag
 caching) from the Actix-Web server.
 
-## Current asset inventory
+## Historical asset inventory
+
+This inventory records the frontend before the TypeScript migration. The
+first-party JavaScript copies listed here have since been replaced by strict
+TypeScript source and deterministic output under `assets/web/generated`.
 
 | File | Lines | Size |
 |------|------:|-----:|

docs/ts-migration-baseline.md

@@ -0,0 +1,50 @@
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# TypeScript migration baseline
+
+This baseline records the browser architecture at the start of the migration.
+It is intentionally historical; generated output sizes are tracked separately
+by the deterministic frontend build.
+
+## Startup order
+
+The initial document loads these scripts in order:
+
+1. `/vendor/opus-decoder-0.7.11.min.js`
+2. `/vendor/leaflet.js`
+3. `/leaflet-ais-tracksymbol.js`
+4. `/webgl-renderer.js`
+5. `/ui-core.js`
+6. `/app.js`
+
+Decoder and feature scripts are then loaded lazily by the inline loader in
+`index.html`. The frontend smoke test locks the core ordering and rejects
+remote script or stylesheet URLs.
+
+## Source measurements
+
+At baseline, first-party JavaScript comprised 23 files and approximately
+776 KiB. The largest sources were:
+
+| Source | Bytes |
+|---|---:|
+| `app.js` | 337,111 |
+| `map-core.js` | 131,899 |
+| `plugins/scheduler.js` | 60,883 |
+| `plugins/bookmarks.js` | 30,543 |
+| `plugins/sat.js` | 22,541 |
+| `plugins/vchan.js` | 20,195 |
+| `webgl-renderer.js` | 18,993 |
+
+The migrated source snapshot contained 123 distinct direct `window.*`
+assignments. These are compatibility callbacks, shared state, and plugin entry
+points. New TypeScript code must not add to that set; the typed plugin registry
+and explicit services replace it over the course of the migration.
+
+All production scripts, stylesheets, fonts, icons, and map assets were already
+served from local embedded routes. The automated startup test ensures no
+remote runtime script or stylesheet dependency is introduced.

docs/ts-migration-plan.md

@@ -0,0 +1,586 @@
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# TypeScript Migration Plan
+
+> **Scope**: `src/trx-client/trx-frontend/trx-frontend-http/`
+>
+> **Status**: Complete (2026-08-01)
+
+## Implementation result
+
+The migration was completed on `feat/typescript-frontend-migration`. The
+baseline and phased sections below are retained as the decision record; their
+descriptions of JavaScript files and classic loading refer to the pre-migration
+state.
+
+Completion evidence:
+
+- all first-party browser sources are strict `.ts` files, checked by separate
+  DOM and Web Worker TypeScript projects with no JavaScript compatibility mode
+  or suppression directives;
+- `bootstrap.ts` is the single first-party HTML entry and esbuild represents
+  startup order, lazy feature imports, shared hashed chunks, and the worker in
+  its module graph;
+- obsolete source and generated compatibility JavaScript was removed;
+- Rust generates rig, status, capability, decoder, and flattened frontend
+  metadata contracts into `api/generated.ts`; runtime guards validate HTTP,
+  SSE, WebSocket, and worker boundaries;
+- the generic embedded-asset handler serves a build-generated allowlist with
+  constrained MIME types, compression, ETags, immutable caching, and no file
+  system lookup;
+- intentional browser host namespaces and transitional lazy-feature properties
+  are documented in `docs/frontend-architecture.md`;
+- CI uses locked npm dependencies, caches npm downloads rather than
+  `node_modules`, runs strict type checking and linting, unit/DOM/worker tests,
+  Chromium startup coverage, generated-output drift checks, and REUSE after
+  generation;
+- Cargo continues to consume committed generated assets without invoking Node
+  or requiring network access.
+
+The final local gate ran `npm ci`, type checking, linting, 30 frontend tests,
+the Chromium smoke flow (startup, auth gate, audio controls, rig switching, map
+initialization, and navigation), generated-contract and bundle verification,
+workspace formatting, Clippy with warnings denied, all-target builds, workspace
+tests, and REUSE 3.3 validation.
+
+## 1. Decision
+
+Migrating the web frontend to TypeScript is worthwhile, provided it is used to
+remove implicit contracts and global coupling. Renaming JavaScript files to
+`.ts` without changing their boundaries would add tooling without delivering
+the main safety benefits.
+
+The migration must be incremental. Every intermediate commit and pull request
+must leave the frontend buildable and usable.
+
+## 2. Baseline State
+
+The frontend currently contains roughly 21,700 lines of first-party
+JavaScript. Its largest components include:
+
+- `app.js`: approximately 8,900 lines;
+- `map-core.js`: approximately 3,500 lines;
+- `plugins/scheduler.js`: approximately 1,500 lines;
+- `plugins/bookmarks.js`: approximately 800 lines;
+- `plugins/vchan.js`: approximately 560 lines.
+
+Important characteristics of the current architecture are:
+
+- scripts are embedded individually into the Rust binary with `include_str!`;
+- the Rust HTTP server exposes an explicit route for each asset;
+- plugins are loaded dynamically as classic scripts;
+- script order is significant;
+- modules communicate through `window.*`, `window.trx`, callbacks, and shared
+  mutable state;
+- the main HTML file contains the plugin loader;
+- a Web Worker is loaded through a fixed URL;
+- Cargo builds do not require Node.js;
+- CI images contain Node.js, but CI currently runs only Rust and REUSE checks;
+- Leaflet, Opus decoder, fonts, images, and other vendored assets are local.
+
+These constraints make a big-bang rewrite unnecessarily risky.
+
+## 3. Goals
+
+The migration should:
+
+1. Create checked contracts between Rust responses and browser code.
+2. Replace global callbacks with explicit module interfaces.
+3. Split `app.js` by responsibility.
+4. Make rig, capability, decoder, scheduler, audio, and spectrum state explicit.
+5. Preserve lazy loading for expensive features.
+6. Add frontend type checking, linting, and automated tests to CI.
+7. Keep ordinary Cargo builds independent of Node.js and network access.
+8. Preserve existing browser behavior throughout the migration.
+
+## 4. Non-Goals
+
+The migration will not initially:
+
+- introduce a UI framework;
+- redesign the user interface;
+- convert vendored JavaScript to TypeScript;
+- change REST, SSE, WebSocket, or worker protocols unless required to make an
+  existing contract unambiguous;
+- make `build.rs` install packages or download frontend dependencies;
+- convert all of `app.js` in one pull request.
+
+## 5. Target Layout
+
+```text
+trx-frontend-http/
+├── frontend/
+│   ├── package.json
+│   ├── package-lock.json
+│   ├── tsconfig.json
+│   ├── tsconfig.worker.json
+│   ├── build.mjs
+│   ├── src/
+│   │   ├── bootstrap.ts
+│   │   ├── api/
+│   │   │   ├── client.ts
+│   │   │   └── generated.ts
+│   │   ├── core/
+│   │   │   ├── dom.ts
+│   │   │   ├── events.ts
+│   │   │   ├── settings.ts
+│   │   │   └── state.ts
+│   │   ├── features/
+│   │   │   ├── audio/
+│   │   │   ├── bookmarks/
+│   │   │   ├── map/
+│   │   │   ├── navigation/
+│   │   │   ├── radio/
+│   │   │   ├── recorder/
+│   │   │   ├── scheduler/
+│   │   │   └── spectrum/
+│   │   ├── decoders/
+│   │   ├── workers/
+│   │   └── legacy/
+│   │       └── global-bridge.ts
+│   └── tests/
+└── assets/web/
+    ├── generated/
+    ├── vendor/
+    ├── index.html
+    ├── style.css
+    └── themes.css
+```
+
+The exact feature directories may evolve, but dependencies should point from
+features toward `core` and `api`, never from `core` back into features.
+
+## 6. Tooling
+
+Use TypeScript for type checking and esbuild for bundling. A framework-specific
+development server is not needed.
+
+Recommended compiler baseline:
+
+```json
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+    "useUnknownInCatchVariables": true,
+    "noEmit": true,
+    "lib": ["ES2022", "DOM"]
+  }
+}
+```
+
+Worker code should use a separate configuration with `WebWorker` rather than
+`DOM` globals.
+
+The package scripts should provide at least:
+
+```text
+npm run typecheck
+npm run lint
+npm test
+npm run build
+npm run verify-generated
+```
+
+Pin dependencies in `package-lock.json`. New package and generated files must
+carry or inherit valid REUSE licensing information.
+
+## 7. Cargo and Asset Integration
+
+Cargo must remain usable on machines without Node.js. Do not invoke `npm`
+automatically from `build.rs`.
+
+The initial integration should work as follows:
+
+1. TypeScript and JavaScript sources live under `frontend/src`.
+2. esbuild writes browser-ready output under `assets/web/generated`.
+3. Generated browser output is committed to the repository.
+4. Rust embeds generated output, not TypeScript source.
+5. CI rebuilds the frontend and fails if committed output is stale.
+
+During early phases, retain the existing public URLs, including:
+
+```text
+/app.js
+/ui-core.js
+/map-core.js
+/scheduler.js
+/decode-history-worker.js
+```
+
+Keeping these URLs stable avoids coupling the first migration phases to changes
+in HTML loading, authentication rules, caching, or Rust routing.
+
+After modules and code splitting are established, replace the explicit list of
+Rust constants and handlers with an embedded generated-asset directory. The
+server must still enforce an allowlist, correct MIME types, cache headers, and
+path traversal protection.
+
+## 8. Rust-to-TypeScript Contracts
+
+Generate TypeScript definitions from Rust wire types instead of maintaining
+parallel handwritten representations.
+
+Initial candidates include:
+
+- `RigState`, `RigInfo`, and `RigCapabilities`;
+- the `/rigs` response;
+- decoder registry entries;
+- scheduler configuration and status;
+- filter and spectrum state;
+- recorder responses;
+- SSE update payloads;
+- decoded-message variants;
+- WebSocket control and status messages.
+
+A generator such as `ts-rs` can produce
+`frontend/src/api/generated.ts`. Generated definitions should describe only
+wire formats. UI state and view models should remain handwritten.
+
+CI must regenerate these definitions and fail when the working tree changes.
+Serde renames, tagged enums, optional fields, flattened values, and numeric
+ranges must be checked explicitly during the initial generator integration.
+
+TypeScript types do not validate data at runtime. Critical compatibility
+boundaries should retain focused runtime checks for missing or malformed data,
+particularly when clients and servers may run different versions.
+
+## 9. Target Module Contracts
+
+Plugins should eventually implement an explicit interface rather than assigning
+callbacks to `window`:
+
+```ts
+interface TrxPlugin {
+  readonly id: string;
+  initialize(context: PluginContext): void | Promise<void>;
+  dispose?(): void;
+}
+
+interface PluginContext {
+  api: TrxApi;
+  events: TrxEventBus;
+  navigation: NavigationService;
+  notifications: NotificationService;
+  state: ReadonlyRadioState;
+}
+```
+
+During the transition, `legacy/global-bridge.ts` may expose the minimum globals
+required by unmigrated scripts. The bridge must shrink as migration progresses;
+new feature code must not add new global callbacks.
+
+State should be divided by responsibility rather than replaced by one large
+typed global:
+
+```ts
+interface RadioState {
+  activeRigId: string | null;
+  capabilities: RigCapabilities | null;
+  connection: ConnectionState;
+  frequencyHz: number | null;
+  mode: RigMode | null;
+  bandwidthHz: number | null;
+}
+
+interface AudioState {
+  rx: AudioStreamState;
+  tx: AudioStreamState;
+  volume: VolumeState;
+}
+
+interface DecoderState {
+  registry: DecoderDescriptor[];
+  status: ReadonlyMap<DecoderId, DecoderStatus>;
+}
+```
+
+Commands should receive a rig ID explicitly. They must not infer their target
+from mutable global selection state after an asynchronous operation begins.
+
+## 10. Migration Phases
+
+### Phase 0: Baseline and Measurements
+
+- Record current asset names, sizes, and load order.
+- Add a browser startup smoke test.
+- Record existing global symbols and plugin callbacks.
+- Confirm that generated bundles do not introduce remote runtime dependencies.
+
+**Exit criterion:** current behavior and asset loading have an automated
+baseline.
+
+### Phase 1: Tooling Scaffold
+
+- Add the frontend package, lockfile, TypeScript configuration, and esbuild.
+- Allow existing JavaScript as build input without type checking it globally.
+- Produce fixed-name outputs matching current URLs.
+- Add frontend commands and CI checks.
+- Document local frontend development commands.
+
+**Exit criterion:** existing JavaScript passes through the frontend build with
+no runtime changes, and CI detects stale generated output.
+
+### Phase 2: Generated API Types
+
+- Add Rust-to-TypeScript type generation.
+- Generate the first status, rig, capability, and decoder contracts.
+- Introduce a typed fetch/post client and typed SSE decoding boundary.
+- Keep narrow runtime guards at compatibility boundaries.
+
+**Exit criterion:** new API consumers cannot use untyped response objects.
+
+### Phase 3: Core Browser Services
+
+Convert or create:
+
+- DOM lookup helpers;
+- notifications and confirmations;
+- settings and per-rig preferences;
+- navigation;
+- the event bus;
+- application state stores;
+- plugin registry and loader.
+
+Convert `ui-core.js` as the first strict TypeScript entry.
+
+**Exit criterion:** shared UI behavior is TypeScript, tested, and does not add
+new globals.
+
+### Phase 4: Independent Leaf Modules
+
+Convert lower-coupling code first:
+
+1. WebGL renderer;
+2. decode-history worker;
+3. screenshot support;
+4. FT2 and FT4;
+5. WSPR;
+6. CW and other decoder views.
+
+Workers must be separate build entries.
+
+**Exit criterion:** each converted module has typed inputs, outputs, and tests.
+
+### Phase 5: Plugin Loading
+
+- Move the inline loader out of `index.html`.
+- Replace classic-script injection with typed dynamic imports.
+- Register plugins through `TrxPlugin`.
+- Preserve lazy loading by tab and feature.
+- Remove the corresponding global callbacks after each plugin migrates.
+
+**Exit criterion:** plugin dependencies and loading order are represented by the
+module graph rather than implicit script order.
+
+### Phase 6: Split the Main Application
+
+Extract `app.js` by responsibility:
+
+1. authentication and API transport;
+2. rig enumeration and switching;
+3. radio commands and capabilities;
+4. audio streaming;
+5. spectrum state and rendering;
+6. decode history;
+7. recorder;
+8. keyboard shortcuts;
+9. application bootstrap.
+
+Do not split by arbitrary line ranges. Each extraction must establish an
+explicit interface and remove the corresponding globals.
+
+**Exit criterion:** the bootstrap file composes services and features but does
+not contain their implementations.
+
+### Phase 7: High-Coupling Features
+
+Convert the remaining large features after the core contracts are stable:
+
+- scheduler and satellite scheduler;
+- bookmarks;
+- virtual channels;
+- map and map-backed statistics;
+- remaining decoder plugins.
+
+**Exit criterion:** no first-party classic scripts or untyped plugin callbacks
+remain.
+
+### Phase 8: Asset-Server Consolidation
+
+- Enable code splitting and hashed chunks.
+- Embed the generated asset directory in Rust.
+- Serve generated assets through a generic, allowlisted handler.
+- Add appropriate immutable caching for hashed output.
+- Retain stable handling for HTML and version metadata.
+- Remove obsolete fixed-asset constants and handlers.
+
+**Exit criterion:** Rust no longer needs a source edit for every generated
+frontend chunk.
+
+### Phase 9: Strictness and Cleanup
+
+- Remove `allowJs`.
+- Remove the legacy global bridge.
+- Enable all selected strict compiler and lint rules.
+- Remove obsolete generated compatibility bundles.
+- Update architecture and contributor documentation.
+
+**Exit criterion:** all first-party frontend source is strict TypeScript and the
+browser runtime exposes only intentionally documented globals.
+
+## 11. Testing Strategy
+
+Frontend CI should run:
+
+```sh
+npm ci
+npm run typecheck
+npm run lint
+npm test
+npm run build
+git diff --exit-code -- assets/web/generated frontend/src/api/generated.ts
+```
+
+Testing should cover four layers:
+
+1. **Pure unit tests** for bandwidth calculations, formatting, state changes,
+   capability decisions, and message routing.
+2. **DOM component tests** for dialogs, tabs, workspace selection, rig
+   switching, and collapsible control sections.
+3. **Worker tests** for decode-history pruning, batching, and message formats.
+4. **Browser smoke tests** for startup, authentication gating, plugin loading,
+   navigation, rig switching, audio controls, and map initialization.
+
+The existing dependency-free `ui-core` test can remain during the scaffold
+phase. It should be moved to the standard TypeScript test runner once that
+runner is established.
+
+## 12. CI Changes
+
+Add a dedicated frontend job rather than hiding frontend work inside the Cargo
+jobs. The job should:
+
+- use the Node.js version provided by the runner image;
+- run with `npm ci`, never a mutable install;
+- cache the npm download cache, not `node_modules`;
+- type-check, lint, test, and build;
+- verify generated artifacts and Rust-generated types are current;
+- run REUSE validation after generated files are produced.
+
+Rust lint and test jobs should continue to consume committed generated assets.
+
+## 13. Pull Request Strategy
+
+Use small, independently reversible pull requests. A recommended sequence is:
+
+1. tooling and unchanged JavaScript build;
+2. generated Rust wire types and typed API client;
+3. `ui-core` conversion;
+4. worker and WebGL conversion;
+5. decoder plugin conversions in small groups;
+6. plugin registry and dynamic imports;
+7. one `app.js` responsibility per PR;
+8. scheduler, bookmarks, and map conversions;
+9. generic embedded asset serving;
+10. removal of JavaScript compatibility mode.
+
+Every PR should include:
+
+- runtime behavior preserved or intentionally documented;
+- frontend type checking and tests;
+- strict Rust formatting and Clippy;
+- generated-artifact drift verification;
+- no newly introduced undocumented `window` globals;
+- no remote runtime asset dependency.
+
+## 14. Risks and Mitigations
+
+### Superficial Conversion
+
+**Risk:** globals receive declarations but remain coupled and mutable.
+
+**Mitigation:** require every converted module to expose explicit inputs and
+outputs and remove at least the globals it replaces.
+
+### Cargo Becomes Dependent on Node
+
+**Risk:** builds fail on systems without Node or network access.
+
+**Mitigation:** commit deterministic generated output and keep npm outside
+`build.rs`.
+
+### Script-Order Regressions
+
+**Risk:** switching to modules changes execution timing and scope.
+
+**Mitigation:** retain current public entries initially, then replace script
+loading only after the plugin registry is in place.
+
+### Unreviewable `app.js` Rewrite
+
+**Risk:** a large conversion is difficult to review, test, or bisect.
+
+**Mitigation:** extract one responsibility at a time and keep bootstrap working
+after every extraction.
+
+### Rust and Browser Contracts Drift
+
+**Risk:** TypeScript compiles against stale wire definitions.
+
+**Mitigation:** generate types from Rust and enforce a clean working tree after
+generation in CI.
+
+### Generated Asset Noise
+
+**Risk:** committed bundles make reviews noisy.
+
+**Mitigation:** separate source and generated commits when useful, include
+source maps, and require deterministic output.
+
+### Bundle or Startup Regression
+
+**Risk:** bundling loads too much code eagerly.
+
+**Mitigation:** record the current baseline, preserve feature-level lazy loads,
+and track entry/chunk sizes in CI.
+
+## 15. Initial Proof of Concept
+
+The first implementation PR should be deliberately limited to:
+
+1. adding the frontend package and locked toolchain;
+2. building existing JavaScript to fixed-name generated output;
+3. adding frontend CI and drift checks;
+4. generating initial rig/status TypeScript definitions;
+5. introducing the typed API client;
+6. converting `ui-core.js` to strict TypeScript;
+7. preserving every existing asset URL and observable behavior.
+
+This proof of concept is the decision gate for the remainder of the migration.
+If it materially improves contract safety without making Cargo development
+unwieldy, continue with the phased plan. If it does not, the repository can
+retain the tooling and the converted core without committing to a full rewrite.
+
+## 16. Completion Criteria
+
+The migration is complete when:
+
+- all first-party browser source is strict TypeScript;
+- vendor files remain isolated and declared through narrow type adapters;
+- Rust wire types generate their browser contracts;
+- no feature depends on accidental script ordering;
+- no undocumented mutable `window` callbacks remain;
+- `app.js` has been replaced by a small typed bootstrap and feature modules;
+- frontend type checking, linting, unit tests, component tests, browser smoke
+  tests, and generated-output checks run in CI;
+- Cargo builds remain possible without Node.js or network access;
+- production assets remain local, embedded, cacheable, and reproducible.

rust-toolchain.toml

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Pins the Rust toolchain for reproducible builds. Keep in sync with the
+# SDK image (container/Containerfile, ARG RUST_VERSION). rustup honours this
+# automatically for local builds outside the SDK container.
+
+[toolchain]
+channel = "1.97.1"
+components = ["rustfmt", "clippy"]

script/dummy-server.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Run trx-server with the dummy backend for development and testing.
 set -euo pipefail
 

src/decoders/trx-ais/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-ais"

src/decoders/trx-ais/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Basic AIS GMSK/HDLC decoder.
 //!
@@ -243,7 +243,7 @@ fn parse_frame(frame: RawFrame, channel: &str) -> Option<AisMessage> {
 
     let message_type = get_uint(&bits, 0, 6)? as u8;
     let repeat = get_uint(&bits, 6, 2)? as u8;
-    let mmsi = get_uint(&bits, 8, 30)? as u32;
+    let mmsi = get_uint(&bits, 8, 30)?;
 
     let mut msg = AisMessage {
         rig_id: None,

src/decoders/trx-aprs/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-aprs"

src/decoders/trx-aprs/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Bell 202 AFSK demodulator + AX.25/APRS decoder.
 //!
@@ -638,7 +638,7 @@ mod tests {
         for (i, &ch) in b"N0CALL".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (0 << 1) | 1; // SSID=0, last=true
+        addr[6] = 1; // SSID=0, last=true
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "N0CALL");
@@ -652,7 +652,7 @@ mod tests {
         for (i, &ch) in b"SP2SJG".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (5 << 1) | 0; // SSID=5, last=false
+        addr[6] = 5 << 1; // SSID=5, last=false
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "SP2SJG");
@@ -667,7 +667,7 @@ mod tests {
         for (i, &ch) in b"W1AW  ".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (0 << 1) | 1;
+        addr[6] = 1;
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "W1AW");
@@ -691,7 +691,7 @@ mod tests {
         for &ch in src_bytes.as_bytes().iter().take(6) {
             frame.push(ch << 1);
         }
-        frame.push((0 << 1) | 1); // SSID=0, last=true
+        frame.push(1); // SSID=0, last=true
                        // Control + PID
         frame.push(0x03); // UI frame
         frame.push(0xF0); // No layer-3 protocol

src/decoders/trx-cw/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-cw"

src/decoders/trx-cw/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Goertzel-based CW (Morse code) decoder.
 //!

src/decoders/trx-decode-log/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-decode-log"

src/decoders/trx-decode-log/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Server-side decoder file logging (APRS / CW / FT8 / WSPR).
 //!

src/decoders/trx-ftx/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-ftx"

src/decoders/trx-ftx/src/common/callsign_hash.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Open-addressing hash table for callsign lookup during FTx decoding.
 //!
@@ -160,8 +160,7 @@ impl CallsignHashTable {
         let mut idx = start_idx;
 
         loop {
-            match &self.entries[idx] {
-                Some(entry) => {
+            let entry = self.entries[idx].as_ref()?;
             let stored = (entry.hash & HASH22_MASK) >> shift;
             if stored == target {
                 return Some(entry.callsign.clone());
@@ -171,9 +170,6 @@ impl CallsignHashTable {
                 return None;
             }
         }
-                None => return None,
-            }
-        }
     }
 
     /// Age all entries and remove those older than `max_age`.

src/decoders/trx-ftx/src/common/constants.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use super::protocol::{FTX_LDPC_K_BYTES, FTX_LDPC_M, FTX_LDPC_N};
 

src/decoders/trx-ftx/src/common/crc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use super::protocol::{FT8_CRC_POLYNOMIAL, FT8_CRC_WIDTH};
 

src/decoders/trx-ftx/src/common/decode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Candidate search, shared decode helpers, and dispatcher functions for FTx decoding.
 //!

src/decoders/trx-ftx/src/common/encode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared LDPC encoding functions used by all FTx protocols.
 

src/decoders/trx-ftx/src/common/ldpc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Pure Rust LDPC decoder for FTx protocols.
 //!
@@ -42,8 +42,8 @@ pub(crate) fn ldpc_check(codeword: &[u8; FTX_LDPC_N]) -> i32 {
     for m in 0..FTX_LDPC_M {
         let mut x: u8 = 0;
         let num_rows = FTX_LDPC_NUM_ROWS[m] as usize;
-        for i in 0..num_rows {
-            x ^= codeword[FTX_LDPC_NM[m][i] as usize - 1];
+        for &nm in FTX_LDPC_NM[m].iter().take(num_rows) {
+            x ^= codeword[nm as usize - 1];
         }
         if x != 0 {
             errors += 1;
@@ -81,11 +81,11 @@ pub fn ldpc_decode(
         for j in 0..FTX_LDPC_M {
             let num_rows = FTX_LDPC_NUM_ROWS[j] as usize;
             let m_row = j * FTX_LDPC_N;
-            for ii1 in 0..num_rows {
-                let i1 = FTX_LDPC_NM[j][ii1] as usize - 1;
+            for &nm1 in FTX_LDPC_NM[j].iter().take(num_rows) {
+                let i1 = nm1 as usize - 1;
                 let mut a = 1.0f32;
-                for ii2 in 0..num_rows {
-                    let i2 = FTX_LDPC_NM[j][ii2] as usize - 1;
+                for &nm2 in FTX_LDPC_NM[j].iter().take(num_rows) {
+                    let i2 = nm2 as usize - 1;
                     if i2 != i1 {
                         a *= fast_tanh(-m_matrix[m_row + i2] / 2.0f32);
                     }
@@ -97,8 +97,8 @@ pub fn ldpc_decode(
         // Hard decisions
         for i in 0..FTX_LDPC_N {
             let mut l = codeword[i];
-            for j in 0..3 {
-                l += e_matrix[(FTX_LDPC_MN[i][j] as usize - 1) * FTX_LDPC_N + i];
+            for &mn in FTX_LDPC_MN[i].iter().take(3) {
+                l += e_matrix[(mn as usize - 1) * FTX_LDPC_N + i];
             }
             plain[i] = if l > 0.0 { 1 } else { 0 };
         }
@@ -113,12 +113,12 @@ pub fn ldpc_decode(
 
         // Update m[][] from e[][]
         for i in 0..FTX_LDPC_N {
-            for ji1 in 0..3 {
-                let j1 = FTX_LDPC_MN[i][ji1] as usize - 1;
+            for (ji1, &mn1) in FTX_LDPC_MN[i].iter().enumerate().take(3) {
+                let j1 = mn1 as usize - 1;
                 let mut l = codeword[i];
-                for ji2 in 0..3 {
+                for (ji2, &mn2) in FTX_LDPC_MN[i].iter().enumerate().take(3) {
                     if ji1 != ji2 {
-                        let j2 = FTX_LDPC_MN[i][ji2] as usize - 1;
+                        let j2 = mn2 as usize - 1;
                         l += e_matrix[j2 * FTX_LDPC_N + i];
                     }
                 }

src/decoders/trx-ftx/src/common/message.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FTx message pack/unpack logic.
 //!

src/decoders/trx-ftx/src/common/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Common types, constants, and shared functions used across all FTx protocols.
 

src/decoders/trx-ftx/src/common/monitor.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Windowed FFT waterfall/spectrogram engine for FTx decoding.
 //!

src/decoders/trx-ftx/src/common/osd.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! OSD-1/OSD-2 CRC-guided bit-flip decoder for the (174,91) LDPC code.
 //!

src/decoders/trx-ftx/src/common/protocol.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// FTx protocol variants.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]

src/decoders/trx-ftx/src/common/text.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Character table lookup and string utility functions for FTx message
 //! encoding/decoding.
@@ -64,11 +64,9 @@ pub fn charn(mut c: i32, table: CharTable) -> char {
                 return EXTRAS[c as usize];
             }
         }
-        CharTable::AlphanumSpaceSlash => {
-            if c == 0 {
+        CharTable::AlphanumSpaceSlash if c == 0 => {
             return '/';
         }
-        }
         _ => {}
     }
 
@@ -116,11 +114,9 @@ pub fn nchar(c: char, table: CharTable) -> Option<i32> {
             '?' => return Some(n + 4),
             _ => {}
         },
-        CharTable::AlphanumSpaceSlash => {
-            if c == '/' {
+        CharTable::AlphanumSpaceSlash if c == '/' => {
             return Some(n);
         }
-        }
         _ => {}
     }
 

src/decoders/trx-ftx/src/decoder.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Top-level FTx decoder matching the `trx-ft8` public API.
 

src/decoders/trx-ftx/src/ft2/bitmetrics.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Per-symbol FFT and multi-scale bit metrics extraction.
 //!

src/decoders/trx-ftx/src/ft2/decode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT2-specific waterfall sync scoring and likelihood extraction.
 

src/decoders/trx-ftx/src/ft2/downsample.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Frequency-domain downsampling via IFFT.
 //!

src/decoders/trx-ftx/src/ft2/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT2 pipeline orchestration.
 //!

src/decoders/trx-ftx/src/ft2/sync.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! 2D sync scoring with complex Costas reference waveforms.
 //!

src/decoders/trx-ftx/src/ft4/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT4-specific sync scoring, likelihood extraction, and tone encoding.
 

src/decoders/trx-ftx/src/ft8/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT8-specific sync scoring, likelihood extraction, and tone encoding.
 

src/decoders/trx-ftx/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 pub mod common;
 mod decoder;

src/decoders/trx-rds/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-rds"

src/decoders/trx-rds/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::f32::consts::{PI, SQRT_2, TAU};
 use std::sync::Arc;
@@ -632,33 +632,18 @@ impl Candidate {
             }
             let segment = usize::from((block_b & 0x0003) as u8);
             let di = ((block_b >> 2) & 0x1) != 0;
-            match segment {
-                0 => {
-                    if self.state.dynamic_pty != Some(di) {
-                        self.state.dynamic_pty = Some(di);
+            let di_flag = Some(di);
+            let slot = match segment {
+                0 => &mut self.state.dynamic_pty,
+                1 => &mut self.state.compressed,
+                2 => &mut self.state.artificial_head,
+                3 => &mut self.state.stereo,
+                _ => unreachable!("segment is masked to two bits"),
+            };
+            if *slot != di_flag {
+                *slot = di_flag;
                 changed = true;
             }
-                }
-                1 => {
-                    if self.state.compressed != Some(di) {
-                        self.state.compressed = Some(di);
-                        changed = true;
-                    }
-                }
-                2 => {
-                    if self.state.artificial_head != Some(di) {
-                        self.state.artificial_head = Some(di);
-                        changed = true;
-                    }
-                }
-                3 => {
-                    if self.state.stereo != Some(di) {
-                        self.state.stereo = Some(di);
-                        changed = true;
-                    }
-                }
-                _ => {}
-            }
             let [b0, b1] = block_d.to_be_bytes();
             self.ps_bytes[segment * 2] = sanitize_text_byte(b0);
             self.ps_bytes[segment * 2 + 1] = sanitize_text_byte(b1);
@@ -1458,9 +1443,9 @@ mod tests {
         }
 
         // BPSK modulate onto the 57 kHz subcarrier.
-        for t in 0..n {
+        for (t, sample) in shaped.iter_mut().enumerate().take(n) {
             let phase = TAU * RDS_SUBCARRIER_HZ * t as f32 / sample_rate;
-            shaped[t] *= phase.cos();
+            *sample *= phase.cos();
         }
         shaped
     }

src/decoders/trx-vdes/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-vdes"

src/decoders/trx-vdes/src/crc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! CRC-16 for VDES link-layer frames.
 //!
@@ -134,9 +134,7 @@ mod tests {
             .flat_map(|&b| (0..8).rev().map(move |i| (b >> i) & 1))
             .collect();
         // Append wrong CRC
-        for _ in 0..16 {
-            bits.push(0);
-        }
+        bits.resize(bits.len() + 16, 0);
         assert!(!check_crc16(&bits));
     }
 

src/decoders/trx-vdes/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! VDES 100 kHz decoder for VDE-TER (ITU-R M.2092-1).
 //!

src/decoders/trx-vdes/src/link_layer.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! VDES link-layer frame parsing per ITU-R M.2092-1.
 //!
@@ -346,8 +346,8 @@ mod tests {
         write_bits(&mut bits, 12, 32, 123456); // source_id
         write_bits(&mut bits, 44, 11, 20); // data_count = 20
                                            // Fill some payload
-        for i in 55..75 {
-            bits[i] = (i % 2) as u8;
+        for (i, bit) in bits.iter_mut().enumerate().take(75).skip(55) {
+            *bit = (i % 2) as u8;
         }
         append_crc(&mut bits);
 

src/decoders/trx-vdes/src/turbo.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Turbo FEC decoder for VDES TER-MCS-1 (100 kHz channel).
 //!

src/decoders/trx-wefax/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wefax"

src/decoders/trx-wefax/src/config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! WEFAX decoder configuration.
 
@@ -19,9 +19,6 @@ pub struct WefaxConfig {
     pub output_dir: Option<String>,
     /// Whether to emit line-by-line progress events.
     pub emit_progress: bool,
-    /// Whether to continuously track and correct sample-clock drift
-    /// (line-to-line cross-correlation) to remove image slant.
-    pub slant_correction: bool,
 }
 
 impl Default for WefaxConfig {
@@ -33,7 +30,6 @@ impl Default for WefaxConfig {
             deviation_hz: 400.0,
             output_dir: None,
             emit_progress: true,
-            slant_correction: true,
         }
     }
 }

src/decoders/trx-wefax/src/decoder.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Top-level WEFAX decoder state machine.
 //!
@@ -43,26 +43,11 @@ const LINE_CORR_NOISE_THRESHOLD: f32 = 0.2;
 /// fldigi's line-to-line correlation check for automatic stop.
 const LINE_CORR_NOISE_LINES: u32 = 30;
 
-/// Pearson correlation above which adjacent lines are considered good
-/// evidence of real image content. Used to verify unverified auto-starts.
-const LINE_CORR_IMAGE_THRESHOLD: f32 = 0.5;
-
-/// Number of consecutive well-correlated lines that verify an unverified
-/// reception (i.e. an auto-start from variance detection). Low enough to
-/// engage quickly on real imagery.
-const VERIFY_HIGH_CORR_STREAK: u32 = 5;
-
-/// Maximum number of scan lines the verifier waits for before giving up on
-/// an unverified reception. Roughly 20 s at 120 LPM. If no high-correlation
-/// streak appears by then, the buffered content is dropped and we return
-/// to Idle without saving anything.
-const VERIFY_TIMEOUT_LINES: u32 = 40;
-
 /// Maximum number of scan-line-equivalent sample windows to wait for phasing
-/// lock before falling through to Receiving (unverified). Typical WEFAX
-/// phasing lasts ~30 s; if the phasing detector hasn't converged by then
-/// we give up on alignment and let the correlation verifier decide whether
-/// the content that follows is a real image. At 120 LPM this is ~30 s.
+/// lock before falling through to Receiving. Typical WEFAX phasing lasts
+/// ~30 s; if the phasing detector hasn't converged by then we give up on
+/// alignment and let the carrier-loss watchdog decide whether the content
+/// that follows is real imagery. At 120 LPM this is ~30 s.
 const PHASING_TIMEOUT_LINES: u32 = 60;
 
 /// WEFAX decoder output event.
@@ -117,18 +102,10 @@ pub struct WefaxDecoder {
     /// `LINE_CORR_NOISE_LINES` the decoder auto-finalizes the in-progress
     /// image (carrier dropped / tx ended without an APT stop tone).
     low_corr_lines: u32,
-    /// `true` once the current reception has been confirmed to contain real
-    /// image content. Set immediately for phasing-driven entries (the APT
-    /// start tone + phasing pulses already proved the signal); set later
-    /// by the correlation verifier for variance-driven auto-starts.
-    verified: bool,
-    /// Rolling count of consecutive well-correlated lines, used to confirm
-    /// an unverified reception.
-    high_corr_streak: u32,
     /// Number of luminance samples processed while in `State::Phasing`.
     /// When this exceeds the equivalent of `PHASING_TIMEOUT_LINES` lines,
-    /// the decoder falls through to Receiving (unverified) so a noisy or
-    /// partial phasing signal doesn't wedge the state machine.
+    /// the decoder falls through to Receiving so a noisy or partial
+    /// phasing signal doesn't wedge the state machine.
     phasing_samples: u64,
     /// Current rig dial frequency in Hz (for image filenames).
     freq_hz: u64,
@@ -157,8 +134,6 @@ impl WefaxDecoder {
             signal_detect_count: 0,
             signal_detect_buf: Vec::with_capacity(INTERNAL_RATE as usize / 2),
             low_corr_lines: 0,
-            verified: false,
-            high_corr_streak: 0,
             phasing_samples: 0,
             freq_hz: 0,
             mode: String::new(),
@@ -267,7 +242,7 @@ impl WefaxDecoder {
                                     .as_millis() as i64,
                             );
                             self.signal_detect_buf.clear();
-                            events.push(self.transition_to_receiving(ioc, lpm, 0, false));
+                            events.push(self.transition_to_receiving(ioc, lpm, 0));
                             break;
                         }
 
@@ -297,12 +272,12 @@ impl WefaxDecoder {
 
                 if let Some(ref mut phasing) = self.phasing {
                     if let Some(offset) = phasing.process(&luminance) {
-                        events.push(self.transition_to_receiving(ioc, lpm, offset, true));
+                        events.push(self.transition_to_receiving(ioc, lpm, offset));
                     } else {
                         // Phasing timeout: if alignment doesn't converge in
                         // ~PHASING_TIMEOUT_LINES lines, fall through to
-                        // Receiving (unverified) and let the correlation
-                        // verifier decide.
+                        // Receiving and let the carrier-loss watchdog decide
+                        // whether the content that follows is real imagery.
                         self.phasing_samples += luminance.len() as u64;
                         let spl = WefaxConfig::samples_per_line(lpm, INTERNAL_RATE) as u64;
                         if self.phasing_samples >= spl * PHASING_TIMEOUT_LINES as u64 {
@@ -310,7 +285,7 @@ impl WefaxDecoder {
                                 ioc,
                                 lpm, "WEFAX: phasing timeout — falling through to receiving"
                             );
-                            events.push(self.transition_to_receiving(ioc, lpm, 0, false));
+                            events.push(self.transition_to_receiving(ioc, lpm, 0));
                         }
                     }
                 }
@@ -327,66 +302,36 @@ impl WefaxDecoder {
 
                 // Feed luminance to line slicer.
                 let mut carrier_lost = false;
-                let mut verify_failed = false;
                 if let Some(ref mut slicer) = self.slicer {
                     let new_lines = slicer.process(&luminance);
                     for line in new_lines {
                         if let Some(ref mut image) = self.image {
-                            // Line-to-line Pearson correlation classifies the
-                            // new line as image-like, noise-like, or flat.
-                            // fldigi-style: real imagery has highly correlated
-                            // adjacent lines; pure noise does not.
+                            // Carrier-loss watchdog: real imagery has highly
+                            // correlated adjacent lines; pure noise does not.
+                            // After LINE_CORR_NOISE_LINES consecutive low-
+                            // correlation lines we finalize (fldigi-style
+                            // automatic stop).
                             if let Some(r) = image.correlation_with_last(&line) {
-                                if r >= LINE_CORR_IMAGE_THRESHOLD {
-                                    self.high_corr_streak += 1;
-                                    self.low_corr_lines = 0;
-                                    if !self.verified
-                                        && self.high_corr_streak >= VERIFY_HIGH_CORR_STREAK
-                                    {
-                                        self.verified = true;
-                                        debug!(
-                                            lines = image.line_count(),
-                                            "WEFAX: reception verified from line correlation"
-                                        );
-                                    }
-                                } else if r < LINE_CORR_NOISE_THRESHOLD {
+                                if r < LINE_CORR_NOISE_THRESHOLD {
                                     self.low_corr_lines += 1;
-                                    self.high_corr_streak = 0;
                                     trace!(
                                         r = format!("{:.3}", r),
                                         count = self.low_corr_lines,
                                         "WEFAX low line-correlation"
                                     );
                                 } else {
-                                    // Middle zone — reset high streak, hold
-                                    // low-corr counter.
-                                    self.high_corr_streak = 0;
+                                    self.low_corr_lines = 0;
                                 }
                             }
                             // Flat lines (correlation == None) don't advance
-                            // either counter — solid bands in real imagery
-                            // shouldn't be scored as noise OR as evidence.
+                            // the counter but also don't reset it — an image
+                            // with a solid band surrounded by noise still
+                            // trips the watchdog once the noise resumes.
 
                             image.push_line(line);
                             let count = image.line_count();
 
-                            // Unverified timeout: if we got here from a
-                            // variance auto-start and line correlation never
-                            // took hold, the "signal" wasn't real WEFAX.
-                            // Abandon without saving.
-                            if !self.verified && count >= VERIFY_TIMEOUT_LINES {
-                                debug!(
-                                    lines = count,
-                                    "WEFAX: failed to verify image content — abandoning"
-                                );
-                                verify_failed = true;
-                                break;
-                            }
-
-                            // Carrier-loss watchdog — only active once the
-                            // reception has been verified (otherwise it
-                            // double-counts with the verify timeout).
-                            if self.verified && self.low_corr_lines >= LINE_CORR_NOISE_LINES {
+                            if self.low_corr_lines >= LINE_CORR_NOISE_LINES {
                                 debug!(
                                     lines = count,
                                     "WEFAX: line correlation lost — auto-finalizing image"
@@ -418,15 +363,6 @@ impl WefaxDecoder {
                     }
                 }
 
-                if verify_failed {
-                    // Drop buffered content without saving — this was a
-                    // false auto-start (tone, noise burst, etc.).
-                    self.image = None;
-                    self.reception_start_ms = None;
-                    self.transition_to_idle();
-                    return events;
-                }
-
                 if carrier_lost {
                     events.extend(self.finalize_image(ioc, lpm));
                     self.transition_to_idle();
@@ -465,8 +401,6 @@ impl WefaxDecoder {
         self.signal_detect_count = 0;
         self.signal_detect_buf.clear();
         self.low_corr_lines = 0;
-        self.verified = false;
-        self.high_corr_streak = 0;
         self.phasing_samples = 0;
         events
     }
@@ -522,30 +456,13 @@ impl WefaxDecoder {
         self.state_event("Phasing", ioc, lpm)
     }
 
-    fn transition_to_receiving(
-        &mut self,
-        ioc: u16,
-        lpm: u16,
-        phase_offset: usize,
-        verified: bool,
-    ) -> WefaxEvent {
-        debug!(
-            ioc,
-            lpm, phase_offset, verified, "WEFAX: entering receiving"
-        );
+    fn transition_to_receiving(&mut self, ioc: u16, lpm: u16, phase_offset: usize) -> WefaxEvent {
+        debug!(ioc, lpm, phase_offset, "WEFAX: entering receiving");
         let ppl = WefaxConfig::pixels_per_line(ioc) as usize;
-        self.slicer = Some(LineSlicer::with_slant(
-            lpm,
-            ioc,
-            INTERNAL_RATE,
-            phase_offset,
-            self.config.slant_correction,
-        ));
+        self.slicer = Some(LineSlicer::new(lpm, ioc, INTERNAL_RATE, phase_offset));
         self.image = Some(ImageAssembler::new(ppl));
         self.tone_detector.reset();
         self.low_corr_lines = 0;
-        self.verified = verified;
-        self.high_corr_streak = 0;
         self.state = State::Receiving { ioc, lpm };
         self.state_event("Receiving", ioc, lpm)
     }
@@ -559,8 +476,6 @@ impl WefaxDecoder {
         self.signal_detect_count = 0;
         self.signal_detect_buf.clear();
         self.low_corr_lines = 0;
-        self.verified = false;
-        self.high_corr_streak = 0;
         self.phasing_samples = 0;
     }
 
@@ -574,12 +489,23 @@ impl WefaxDecoder {
 
             let ppl = WefaxConfig::pixels_per_line(ioc);
             let mut path_str = None;
+            let mut png_data = None;
 
             // Save PNG if output directory is configured.
             if let Some(ref dir) = self.config.output_dir {
                 let output_path = PathBuf::from(dir);
                 match image.save_png(&output_path, self.freq_hz, &self.mode) {
                     Ok(p) => {
+                        // Read back the PNG bytes for remote client transfer.
+                        match std::fs::read(&p) {
+                            Ok(bytes) => {
+                                png_data =
+                                    Some(base64::engine::general_purpose::STANDARD.encode(&bytes));
+                            }
+                            Err(e) => {
+                                eprintln!("WEFAX: failed to read PNG for transfer: {}", e);
+                            }
+                        }
                         path_str = Some(p.to_string_lossy().into_owned());
                     }
                     Err(e) => {
@@ -597,6 +523,7 @@ impl WefaxDecoder {
                 ioc,
                 pixels_per_line: ppl,
                 path: path_str,
+                png_data,
                 complete: true,
             }));
         }

src/decoders/trx-wefax/src/demod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FM discriminator for WEFAX demodulation.
 //!

src/decoders/trx-wefax/src/image.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Image buffer and PNG encoding for WEFAX decoded images.
 
@@ -144,9 +144,15 @@ impl ImageAssembler {
         }
         debug_assert_eq!(img_data.len(), expected_bytes);
 
-        writer
-            .write_image_data(&img_data)
-            .map_err(|e| format!("write PNG data ({} bytes, {}x{}): {}", img_data.len(), width, height, e))?;
+        writer.write_image_data(&img_data).map_err(|e| {
+            format!(
+                "write PNG data ({} bytes, {}x{}): {}",
+                img_data.len(),
+                width,
+                height,
+                e
+            )
+        })?;
 
         // Explicitly finish the writer (writes IEND). Relying on Drop
         // alone swallows any I/O error and can yield a truncated file.
@@ -268,7 +274,8 @@ mod tests {
 
         // Pseudo-random noise vs gradient — correlation should be low.
         let noise: Vec<u8> = (0..256)
-            .map(|i| ((i * 1103515245 + 12345) as u32 >> 8 & 0xff) as u8)
+            .map(|i| (i as u32).wrapping_mul(1_103_515_245).wrapping_add(12_345))
+            .map(|value| ((value >> 8) & 0xff) as u8)
             .collect();
         let r = asm.correlation_with_last(&noise).expect("r");
         assert!(
@@ -368,8 +375,8 @@ mod tests {
         let (y, m, d, h, mi, _) = unix_to_utc(1775055000);
         assert_eq!(y, 2026);
         // Just verify reasonable values without asserting exact date.
-        assert!(m >= 1 && m <= 12);
-        assert!(d >= 1 && d <= 31);
+        assert!((1..=12).contains(&m));
+        assert!((1..=31).contains(&d));
         assert!(h < 24);
         assert!(mi < 60);
     }

src/decoders/trx-wefax/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! WEFAX (Weather Facsimile) decoder.
 //!

src/decoders/trx-wefax/src/line_slicer.rs

@@ -1,27 +1,15 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Line slicer: pixel clock recovery and line buffer assembly.
 //!
 //! Once the phasing detector has established a line-start phase offset,
 //! the line slicer accumulates demodulated luminance samples and extracts
 //! complete image lines at the configured LPM rate.
-//!
-//! When `slant_correction` is enabled, the slicer tracks line-to-line
-//! drift via cross-correlation with the previous line and nudges the
-//! extraction cursor by ±`MAX_DRIFT_SAMPLES` per line. This compensates
-//! for the small mismatch between the transmitter's and receiver's
-//! sample clocks that would otherwise skew the assembled image.
 
 use crate::config::WefaxConfig;
 
-/// Maximum per-line drift (in samples at the internal rate) searched for
-/// when slant correction is enabled. At 120 LPM / 11025 Hz there are
-/// ~5512 samples per line, so ±6 samples is ~0.1% drift per line — more
-/// than enough for any real-world sample-clock mismatch.
-const MAX_DRIFT_SAMPLES: usize = 6;
-
 /// Line slicer for WEFAX image assembly.
 pub struct LineSlicer {
     /// Samples per line at the internal sample rate.
@@ -30,34 +18,14 @@ pub struct LineSlicer {
     pixels_per_line: usize,
     /// Phase offset in samples from the phasing detector.
     phase_offset: usize,
-    /// Accumulated luminance samples. While `slant_correction` is on,
-    /// the buffer anchor is the *start of the previous line* (so the
-    /// first `samples_per_line` samples are the reference for drift
-    /// tracking). Without slant correction the anchor is simply the
-    /// start of the next line to extract.
+    /// Accumulated luminance samples.
     buffer: Vec<f32>,
     /// Whether we have aligned to the phase offset yet.
     aligned: bool,
-    /// Whether a reference (previous) line is held at the buffer anchor.
-    has_reference: bool,
-    /// Enable line-to-line drift tracking.
-    slant_correction: bool,
-    /// Cumulative drift applied so far (samples). Diagnostic.
-    pub(crate) total_drift: i64,
 }
 
 impl LineSlicer {
     pub fn new(lpm: u16, ioc: u16, sample_rate: u32, phase_offset: usize) -> Self {
-        Self::with_slant(lpm, ioc, sample_rate, phase_offset, true)
-    }
-
-    pub fn with_slant(
-        lpm: u16,
-        ioc: u16,
-        sample_rate: u32,
-        phase_offset: usize,
-        slant_correction: bool,
-    ) -> Self {
         let samples_per_line = WefaxConfig::samples_per_line(lpm, sample_rate);
         let pixels_per_line = WefaxConfig::pixels_per_line(ioc) as usize;
 
@@ -65,11 +33,8 @@ impl LineSlicer {
             samples_per_line,
             pixels_per_line,
             phase_offset,
-            buffer: Vec::with_capacity(samples_per_line * 3),
+            buffer: Vec::with_capacity(samples_per_line * 2),
             aligned: false,
-            has_reference: false,
-            slant_correction,
-            total_drift: 0,
         }
     }
 
@@ -90,58 +55,17 @@ impl LineSlicer {
             self.aligned = true;
         }
 
-        let spl = self.samples_per_line;
-
-        if !self.slant_correction {
-            // Simple fixed-period extraction.
+        // Extract complete lines (single drain at the end to avoid O(n²)).
         let mut offset = 0;
-            while offset + spl <= self.buffer.len() {
-                let line_samples = &self.buffer[offset..offset + spl];
+        while offset + self.samples_per_line <= self.buffer.len() {
+            let line_samples = &self.buffer[offset..offset + self.samples_per_line];
             let pixels = self.resample_line(line_samples);
             lines.push(pixels);
-                offset += spl;
+            offset += self.samples_per_line;
         }
         if offset > 0 {
             self.buffer.drain(..offset);
         }
-            return lines;
-        }
-
-        // Slant-corrected extraction.
-        let max_shift = MAX_DRIFT_SAMPLES;
-
-        // Bootstrap: the very first line has no previous reference.
-        // Extract it naively and keep it in the buffer as the reference.
-        if !self.has_reference {
-            if self.buffer.len() < spl {
-                return lines;
-            }
-            let first = self.buffer[0..spl].to_vec();
-            let pixels = self.resample_line(&first);
-            lines.push(pixels);
-            self.has_reference = true;
-            // Do NOT drain: the first `spl` samples remain as the
-            // reference for the next line's drift search.
-        }
-
-        // Subsequent lines: for each iteration, buffer[0..spl] is the
-        // reference line, and we search for the best starting position
-        // of the NEXT line in the range [spl - max_shift, spl + max_shift].
-        while self.buffer.len() >= 2 * spl + max_shift {
-            let prev = &self.buffer[0..spl];
-            let (best_d, _best_r) =
-                search_best_shift(prev, &self.buffer, spl, max_shift);
-
-            let start = (spl as i32 + best_d) as usize;
-            let next_line = self.buffer[start..start + spl].to_vec();
-            let pixels = self.resample_line(&next_line);
-            lines.push(pixels);
-
-            // Advance the anchor to the start of the line we just
-            // emitted — it becomes the reference for the next iteration.
-            self.buffer.drain(..start);
-            self.total_drift += best_d as i64;
-        }
 
         lines
     }
@@ -150,16 +74,9 @@ impl LineSlicer {
         self.pixels_per_line
     }
 
-    /// Samples per line at the internal rate (for diagnostics).
-    pub fn samples_per_line(&self) -> usize {
-        self.samples_per_line
-    }
-
     pub fn reset(&mut self) {
         self.buffer.clear();
         self.aligned = false;
-        self.has_reference = false;
-        self.total_drift = 0;
     }
 
     /// Resample a line's worth of luminance samples to the target pixel count
@@ -190,82 +107,6 @@ impl LineSlicer {
     }
 }
 
-/// Search for the drift `d ∈ [-max_shift, +max_shift]` that maximises
-/// the Pearson correlation between `reference` and
-/// `buffer[spl+d .. spl+d+spl]`.
-///
-/// Returns `(best_d, best_r)`. A correlation-peak deadband prefers
-/// `d = 0` when the peak is only marginally better than at zero, which
-/// keeps tracking stable on quiet lines.
-fn search_best_shift(
-    reference: &[f32],
-    buffer: &[f32],
-    spl: usize,
-    max_shift: usize,
-) -> (i32, f32) {
-    debug_assert!(buffer.len() >= 2 * spl + max_shift);
-    debug_assert_eq!(reference.len(), spl);
-
-    // Pre-compute reference mean + variance.
-    let n = spl as f32;
-    let mean_r = reference.iter().sum::<f32>() / n;
-    let mut var_r = 0.0f32;
-    for &v in reference {
-        let d = v - mean_r;
-        var_r += d * d;
-    }
-
-    // Guard against a flat reference line — drift tracking is useless.
-    const MIN_VAR: f32 = 32.0;
-    if var_r < MIN_VAR {
-        return (0, 0.0);
-    }
-
-    let ms = max_shift as i32;
-    let mut best_d = 0i32;
-    let mut best_r = f32::NEG_INFINITY;
-    let mut r_at_zero = 0.0f32;
-
-    for d in -ms..=ms {
-        let start = (spl as i32 + d) as usize;
-        let candidate = &buffer[start..start + spl];
-
-        let mean_c = candidate.iter().sum::<f32>() / n;
-        let mut var_c = 0.0f32;
-        let mut cov = 0.0f32;
-        for (i, &v) in candidate.iter().enumerate() {
-            let dr = reference[i] - mean_r;
-            let dc = v - mean_c;
-            cov += dr * dc;
-            var_c += dc * dc;
-        }
-
-        let r = if var_c < MIN_VAR {
-            // Skip flat candidate slices.
-            f32::NEG_INFINITY
-        } else {
-            cov / (var_r.sqrt() * var_c.sqrt())
-        };
-
-        if d == 0 {
-            r_at_zero = r;
-        }
-        if r > best_r {
-            best_r = r;
-            best_d = d;
-        }
-    }
-
-    // Deadband: if the peak is only marginally better than `d = 0`,
-    // stick with zero. This avoids per-line jitter when drift is small.
-    const DEADBAND: f32 = 0.01;
-    if r_at_zero.is_finite() && best_r - r_at_zero < DEADBAND {
-        return (0, r_at_zero);
-    }
-
-    (best_d, best_r)
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -278,8 +119,7 @@ mod tests {
         let spl = WefaxConfig::samples_per_line(lpm, sr);
         let ppl = WefaxConfig::pixels_per_line(ioc) as usize;
 
-        // Slant correction off for deterministic line count.
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, false);
+        let mut slicer = LineSlicer::new(lpm, ioc, sr, 0);
         // Feed exactly 3 lines worth of white.
         let samples = vec![1.0f32; spl * 3];
         let lines = slicer.process(&samples);
@@ -296,7 +136,7 @@ mod tests {
         let sr = 11025;
         let spl = WefaxConfig::samples_per_line(lpm, sr);
 
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, false);
+        let mut slicer = LineSlicer::new(lpm, ioc, sr, 0);
         // Feed a linear ramp from 0.0 to 1.0.
         let samples: Vec<f32> = (0..spl).map(|i| i as f32 / spl as f32).collect();
         let lines = slicer.process(&samples);
@@ -305,92 +145,4 @@ mod tests {
         assert!(lines[0][0] < 5);
         assert!(lines[0].last().copied().unwrap_or(0) > 250);
     }
-
-    /// Synthesise a noisy-ish gradient line that repeats with a small
-    /// per-line offset, simulating a sample-clock mismatch. The slant
-    /// tracker should follow the drift.
-    #[test]
-    fn slant_tracker_follows_drift() {
-        let lpm = 120;
-        let ioc = 576;
-        let sr = 11025;
-        let spl = WefaxConfig::samples_per_line(lpm, sr);
-
-        // Build a signal where each real line is `spl + 3` samples long
-        // (i.e. transmitter clock is slower than expected → positive drift
-        // of +3 samples per line). The content needs high-frequency
-        // structure for a few-sample shift to be detectable against the
-        // deadband.
-        let true_line_len = spl + 3;
-        let mut signal: Vec<f32> = Vec::new();
-        let base: Vec<f32> = (0..true_line_len)
-            .map(|i| {
-                // Pseudo-random-but-repeatable content with a narrow
-                // bright stripe — sharp features make sub-line shifts
-                // easy to localise.
-                let x = ((i as u32).wrapping_mul(2654435761)) >> 16;
-                let noise = (x & 0xff) as f32 / 255.0;
-                let stripe = if i == true_line_len / 3 { 1.0 } else { 0.0 };
-                0.3 + 0.4 * noise + stripe
-            })
-            .collect();
-        // 20 lines, each identical.
-        for _ in 0..20 {
-            signal.extend_from_slice(&base);
-        }
-
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, true);
-        let lines = slicer.process(&signal);
-
-        // Expect ~ (20*true_line_len - spl) / (spl+drift) lines with
-        // drift absorbing the extra 2 samples per line.
-        assert!(
-            lines.len() >= 15,
-            "slant-corrected slicer produced only {} lines",
-            lines.len()
-        );
-        // Should have tracked positive drift.
-        assert!(
-            slicer.total_drift > 0,
-            "expected positive drift, got {}",
-            slicer.total_drift
-        );
-        // Roughly +3 per line (after the first bootstrap line); allow wide tolerance.
-        let per_line = slicer.total_drift as f32 / (lines.len() - 1) as f32;
-        assert!(
-            per_line > 1.5 && per_line < 4.0,
-            "per-line drift {:.2} out of range (total {}, lines {})",
-            per_line,
-            slicer.total_drift,
-            lines.len()
-        );
-    }
-
-    #[test]
-    fn slant_tracker_deadband_on_no_drift() {
-        let lpm = 120;
-        let ioc = 576;
-        let sr = 11025;
-        let spl = WefaxConfig::samples_per_line(lpm, sr);
-
-        // Perfectly aligned lines → drift should stay at zero.
-        let line: Vec<f32> = (0..spl)
-            .map(|i| {
-                let t = i as f32 / spl as f32;
-                0.5 + 0.4 * (t * 9.0 * std::f32::consts::PI).sin()
-            })
-            .collect();
-        let mut signal = Vec::new();
-        for _ in 0..10 {
-            signal.extend_from_slice(&line);
-        }
-
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, true);
-        let _ = slicer.process(&signal);
-        // Deadband should keep drift at 0.
-        assert_eq!(
-            slicer.total_drift, 0,
-            "no drift expected for identical lines"
-        );
-    }
 }

src/decoders/trx-wefax/src/phase.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Phasing signal detector and line-start alignment for WEFAX.
 //!
@@ -161,10 +161,8 @@ mod tests {
 
         for line_idx in 0..20 {
             let mut line = vec![1.0f32; spl];
-            for j in pulse_start..pulse_start + pw {
-                if j < spl {
-                    line[j] = 0.0;
-                }
+            for slot in line.iter_mut().skip(pulse_start).take(pw) {
+                *slot = 0.0;
             }
             let result = det.process(&line);
             if let Some(offset) = result {

src/decoders/trx-wefax/src/resampler.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Polyphase rational resampler: 48000 Hz → 11025 Hz.
 //!

src/decoders/trx-wefax/src/tone_detect.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! APT tone detector for WEFAX start/stop signals.
 //!

src/decoders/trx-wspr/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wspr"

src/decoders/trx-wspr/src/decoder.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use crate::protocol;
 

src/decoders/trx-wspr/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 mod decoder;
 mod protocol;

src/decoders/trx-wspr/src/protocol.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// Decoded WSPR message payload.
 #[derive(Debug, Clone)]
@@ -483,7 +483,7 @@ mod tests {
         let c4 = idx27(b'T');
         let c5 = idx27(b' ');
         let n1 = ((c0 * 36 + c1) * 10 + c2) * 27u32.pow(3) + c3 * 27u32.pow(2) + c4 * 27 + c5;
-        let m1 = (179 - 10 * 5 - 2) * 180 + 10 * 13 + 0; // FN20
+        let m1 = (179 - 10 * 5 - 2) * 180 + 10 * 13; // FN20 (final term is 0)
         let power_code = 37u32;
 
         let mut input_bits = [0u8; NBITS];
@@ -530,8 +530,8 @@ mod tests {
     fn interleave_deinterleave_roundtrip() {
         // Create a sequence of distinguishable values
         let mut original = [0u8; NSYMS];
-        for i in 0..NSYMS {
-            original[i] = (i % 256) as u8;
+        for (i, slot) in original.iter_mut().enumerate() {
+            *slot = (i % 256) as u8;
         }
 
         let interleaved = interleave(&original);

src/decoders/trx-wxsat/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wxsat"

src/decoders/trx-wxsat/src/image_enc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared PNG image encoding for weather satellite decoders.
 //!

src/decoders/trx-wxsat/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Weather satellite image decoders.
 //!

src/decoders/trx-wxsat/src/lrpt/cadu.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! CCSDS CADU (Channel Access Data Unit) frame synchronisation and extraction.
 //!

src/decoders/trx-wxsat/src/lrpt/demod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! QPSK demodulator for Meteor-M LRPT.
 //!

src/decoders/trx-wxsat/src/lrpt/mcu.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! MCU (Minimum Coded Unit) assembly and multi-channel image composition.
 //!

src/decoders/trx-wxsat/src/lrpt/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Meteor-M LRPT (Low Rate Picture Transmission) satellite image decoder.
 //!

src/trx-app/Cargo.toml

@@ -1,12 +1,12 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-app"
 version.workspace = true
 edition = "2021"
-license = "BSD-2-Clause"
+license = "GPL-2.0-or-later"
 
 [dependencies]
 serde = { workspace = true }

src/trx-app/src/config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use serde::de::DeserializeOwned;
 use std::path::{Path, PathBuf};

src/trx-app/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 pub mod config;
 pub mod logging;

src/trx-app/src/logging.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use tracing::Level;
 use tracing_subscriber::FmtSubscriber;

src/trx-app/src/shared_config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared configuration validation helpers used by both `trx-server` and
 //! `trx-client`.

src/trx-app/src/util.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// Normalize a name to lowercase alphanumeric.
 pub fn normalize_name(name: &str) -> String {

src/trx-client/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-client"

src/trx-client/src/audio_bridge.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Local audio bridge for trx-client.
 //!

src/trx-client/src/audio_client.rs

@@ -1,13 +1,13 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Audio TCP client that connects to the server's audio port and relays
 //! RX/TX Opus frames via broadcast/mpsc channels.
 
 use std::collections::{HashMap, HashSet};
 use std::sync::{Arc, Mutex, RwLock};
-use std::time::Duration;
+use std::time::{Duration, Instant};
 
 use bytes::Bytes;
 use flate2::read::GzDecoder;
@@ -36,6 +36,13 @@ use trx_core::audio::{
 use trx_core::decode::DecodedMessage;
 use trx_frontend::VChanAudioCmd;
 
+/// Minimum uptime before a connection is "stable" enough to reset the
+/// reconnect backoff.  Connections that die before this threshold leave the
+/// exponential backoff climbing — protects the server from a tight reconnect
+/// storm when the peer is broken in some way that only manifests after the
+/// TCP handshake.
+const STABLE_CONNECTION_THRESHOLD: Duration = Duration::from_secs(30);
+
 #[derive(Clone, Debug)]
 struct ActiveVChanSub {
     freq_hz: u64,
@@ -289,7 +296,7 @@ async fn run_single_rig_audio_client(
         info!("Audio client [{}]: connecting to {}", rig_id, server_addr);
         match TcpStream::connect(&server_addr).await {
             Ok(stream) => {
-                reconnect_delay = Duration::from_secs(1);
+                let connected_at = Instant::now();
                 if let Err(e) = handle_single_rig_connection(
                     stream,
                     &rig_id,
@@ -311,6 +318,13 @@ async fn run_single_rig_audio_client(
                 {
                     warn!("Audio connection [{}] dropped: {}", rig_id, e);
                 }
+                // Only reset the backoff after a connection survived long
+                // enough to be considered stable.  TCP `connect()` succeeding
+                // is not enough — a peer that fails immediately after
+                // accepting must not be hammered every second.
+                if connected_at.elapsed() >= STABLE_CONNECTION_THRESHOLD {
+                    reconnect_delay = Duration::from_secs(1);
+                }
             }
             Err(e) => {
                 warn!("Audio connect [{}] failed: {}", rig_id, e);
@@ -342,59 +356,6 @@ async fn run_single_rig_audio_client(
     }
 }
 
-#[cfg(test)]
-mod tests {
-    use super::{resolve_audio_addr, AudioConnectConfig};
-    use std::collections::HashMap;
-
-    #[test]
-    fn resolve_audio_addr_prefers_fixed_url() {
-        let mut rig_connect = HashMap::new();
-        rig_connect.insert(
-            "home-hf".to_string(),
-            AudioConnectConfig::fixed("audio.example.com:4700".to_string()),
-        );
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            Some(4531),
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "audio.example.com:4700");
-    }
-
-    #[test]
-    fn resolve_audio_addr_uses_advertised_port_with_remote_host() {
-        let mut rig_connect = HashMap::new();
-        rig_connect.insert(
-            "home-hf".to_string(),
-            AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
-        );
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            Some(4600),
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "control.example.com:4600");
-    }
-
-    #[test]
-    fn resolve_audio_addr_falls_back_to_default_port() {
-        let rig_connect = HashMap::new();
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            None,
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "fallback.example.com:4531");
-    }
-}
-
 /// Handle a single TCP connection for one rig.  Similar to `handle_audio_connection`
 /// but publishes to per-rig channels directly and mirrors to global when selected.
 #[allow(clippy::too_many_arguments)]
@@ -586,7 +547,10 @@ async fn handle_single_rig_connection(
                         rig_id_for_rx, msg_type
                     );
                 }
-                Err(_) => break,
+                Err(e) => {
+                    warn!("Audio client [{}]: read error: {}", rig_id_for_rx, e);
+                    break;
+                }
             }
         }
     });
@@ -750,3 +714,56 @@ async fn handle_single_rig_connection(
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::{resolve_audio_addr, AudioConnectConfig};
+    use std::collections::HashMap;
+
+    #[test]
+    fn resolve_audio_addr_prefers_fixed_url() {
+        let mut rig_connect = HashMap::new();
+        rig_connect.insert(
+            "home-hf".to_string(),
+            AudioConnectConfig::fixed("audio.example.com:4700".to_string()),
+        );
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            Some(4531),
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "audio.example.com:4700");
+    }
+
+    #[test]
+    fn resolve_audio_addr_uses_advertised_port_with_remote_host() {
+        let mut rig_connect = HashMap::new();
+        rig_connect.insert(
+            "home-hf".to_string(),
+            AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
+        );
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            Some(4600),
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "control.example.com:4600");
+    }
+
+    #[test]
+    fn resolve_audio_addr_falls_back_to_default_port() {
+        let rig_connect = HashMap::new();
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            None,
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "fallback.example.com:4531");
+    }
+}

src/trx-client/src/config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Configuration file support for trx-client.
 //!
@@ -1110,8 +1110,8 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_duplicate_remote_names() {
-        let mut config = ClientConfig::default();
-        config.remotes = vec![
+        let config = ClientConfig {
+            remotes: vec![
                 RemoteEntry {
                     name: "dup".to_string(),
                     url: "a:4530".to_string(),
@@ -1126,20 +1126,24 @@ url = "remote.example.com:4530"
                     auth: RemoteAuthConfig::default(),
                     poll_interval_ms: 750,
                 },
-        ];
+            ],
+            ..Default::default()
+        };
         assert!(config.validate().unwrap_err().contains("duplicate name"));
     }
 
     #[test]
     fn test_validate_rejects_empty_remote_name() {
-        let mut config = ClientConfig::default();
-        config.remotes = vec![RemoteEntry {
+        let config = ClientConfig {
+            remotes: vec![RemoteEntry {
                 name: "".to_string(),
                 url: "a:4530".to_string(),
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()
@@ -1148,14 +1152,16 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_empty_remote_url() {
-        let mut config = ClientConfig::default();
-        config.remotes = vec![RemoteEntry {
+        let config = ClientConfig {
+            remotes: vec![RemoteEntry {
                 name: "hf".to_string(),
                 url: "  ".to_string(),
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()
@@ -1164,14 +1170,16 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_zero_remote_poll_interval() {
-        let mut config = ClientConfig::default();
-        config.remotes = vec![RemoteEntry {
+        let config = ClientConfig {
+            remotes: vec![RemoteEntry {
                 name: "hf".to_string(),
                 url: "a:4530".to_string(),
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 0,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()

src/trx-client/src/main.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 mod audio_bridge;
 mod audio_client;
@@ -386,6 +386,7 @@ async fn async_init() -> DynResult<AppState> {
             rig_id_to_short_name,
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: frontend_runtime.routing.sat_passes.clone(),
+            rig_meters: frontend_runtime.routing.rig_meters.clone(),
         };
         let state_tx = state_tx.clone();
         let remote_shutdown_rx = shutdown_rx.clone();

src/trx-client/src/remote_client.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::collections::HashMap;
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -20,7 +20,7 @@ use trx_core::{RigError, RigResult};
 use trx_frontend::{RemoteRigEntry, SharedSpectrum};
 use trx_protocol::rig_command_to_client;
 use trx_protocol::types::RigEntry;
-use trx_protocol::{ClientCommand, ClientEnvelope, ClientResponse};
+use trx_protocol::{ClientCommand, ClientEnvelope, ClientResponse, MeterUpdate};
 
 const DEFAULT_REMOTE_PORT: u16 = 4530;
 const DEFAULT_AUDIO_PORT: u16 = 4531;
@@ -77,6 +77,9 @@ pub struct RemoteClientConfig {
     pub short_name_to_rig_id: Arc<RwLock<HashMap<String, String>>>,
     /// Cached satellite pass predictions from the server (GetSatPasses).
     pub sat_passes: Arc<RwLock<Option<trx_core::geo::PassPredictionResult>>>,
+    /// Per-rig meter watch senders, keyed by short name (or rig_id in legacy mode).
+    /// Populated lazily by the meter-connection supervisor.
+    pub rig_meters: Arc<RwLock<HashMap<String, watch::Sender<Option<MeterUpdate>>>>>,
 }
 
 pub async fn run_remote_client(
@@ -88,6 +91,11 @@ pub async fn run_remote_client(
     // Spectrum polling runs on its own dedicated TCP connection so it never
     // blocks state polls or user commands on the main connection.
     let spectrum_task = tokio::spawn(run_spectrum_connection(config.clone(), shutdown_rx.clone()));
+    // Meter supervisor: spawns per-rig meter-streaming TCP connections as
+    // soon as short names are discovered.  Runs independently so the meter
+    // bar in the UI updates at the full server-side 30 Hz without being
+    // gated on state polls or user commands.
+    let meter_supervisor = tokio::spawn(run_meter_supervisor(config.clone(), shutdown_rx.clone()));
 
     let mut reconnect_delay = Duration::from_secs(1);
 
@@ -95,6 +103,7 @@ pub async fn run_remote_client(
         if *shutdown_rx.borrow() {
             info!("Remote client shutting down");
             spectrum_task.abort();
+            meter_supervisor.abort();
             return Ok(());
         }
 
@@ -159,11 +168,13 @@ pub async fn run_remote_client(
                     Ok(()) if *shutdown_rx.borrow() => {
                         info!("Remote client shutting down");
                         spectrum_task.abort();
+                        meter_supervisor.abort();
                         return Ok(());
                     }
                     Ok(()) => {}
                     Err(_) => {
                         spectrum_task.abort();
+                        meter_supervisor.abort();
                         return Ok(());
                     }
                 }
@@ -212,6 +223,178 @@ async fn run_spectrum_connection(
     }
 }
 
+/// Meter stream supervisor.  Watches the set of known short names and spawns
+/// one dedicated TCP connection per rig that streams `MeterUpdate` JSON lines
+/// (see `trx_protocol::MeterUpdate`).  Each per-rig task owns its own watch
+/// sender in `config.rig_meters` and reconnects on failure.
+async fn run_meter_supervisor(config: RemoteClientConfig, mut shutdown_rx: watch::Receiver<bool>) {
+    let mut tasks: HashMap<String, tokio::task::JoinHandle<()>> = HashMap::new();
+    let mut poll = time::interval(Duration::from_millis(500));
+
+    loop {
+        tokio::select! {
+            _ = poll.tick() => {}
+            changed = shutdown_rx.changed() => {
+                if matches!(changed, Ok(()) | Err(_)) && *shutdown_rx.borrow() {
+                    for (_, handle) in tasks.drain() {
+                        handle.abort();
+                    }
+                    return;
+                }
+            }
+        }
+
+        let known = collect_known_short_names(&config);
+        for name in &known {
+            if tasks.contains_key(name) {
+                continue;
+            }
+            // Ensure a watch sender exists so SSE clients can subscribe
+            // before the first sample arrives.
+            {
+                if let Ok(mut map) = config.rig_meters.write() {
+                    map.entry(name.clone())
+                        .or_insert_with(|| watch::channel(None).0);
+                }
+            }
+            let task = tokio::spawn(run_meter_connection(
+                config.clone(),
+                name.clone(),
+                shutdown_rx.clone(),
+            ));
+            tasks.insert(name.clone(), task);
+        }
+    }
+}
+
+fn collect_known_short_names(config: &RemoteClientConfig) -> Vec<String> {
+    let mut names: Vec<String> = Vec::new();
+    if has_short_names(config) {
+        names.extend(config.rig_id_to_short_name.values().cloned());
+    }
+    if let Ok(map) = config.rig_states.read() {
+        for name in map.keys() {
+            if !names.iter().any(|n| n == name) {
+                names.push(name.clone());
+            }
+        }
+    }
+    names
+}
+
+/// One dedicated TCP connection per short-name that sends `SubscribeMeter` and
+/// pumps the server's `MeterUpdate` JSON stream into the per-rig watch sender.
+async fn run_meter_connection(
+    config: RemoteClientConfig,
+    short_name: String,
+    mut shutdown_rx: watch::Receiver<bool>,
+) {
+    loop {
+        if *shutdown_rx.borrow() {
+            return;
+        }
+
+        let stream = match time::timeout(CONNECT_TIMEOUT, TcpStream::connect(&config.addr)).await {
+            Ok(Ok(s)) => s,
+            Ok(Err(e)) => {
+                warn!("Meter[{}]: connect failed: {}", short_name, e);
+                if wait_reconnect(&mut shutdown_rx, Duration::from_secs(1)).await {
+                    return;
+                }
+                continue;
+            }
+            Err(_) => {
+                warn!("Meter[{}]: connect timed out", short_name);
+                if wait_reconnect(&mut shutdown_rx, Duration::from_secs(1)).await {
+                    return;
+                }
+                continue;
+            }
+        };
+        let _ = stream.set_nodelay(true);
+
+        if let Err(e) = stream_meter(&config, &short_name, stream, &mut shutdown_rx).await {
+            warn!("Meter[{}]: stream ended: {}", short_name, e);
+        }
+
+        if wait_reconnect(&mut shutdown_rx, Duration::from_secs(1)).await {
+            return;
+        }
+    }
+}
+
+async fn wait_reconnect(shutdown_rx: &mut watch::Receiver<bool>, delay: Duration) -> bool {
+    tokio::select! {
+        _ = time::sleep(delay) => false,
+        changed = shutdown_rx.changed() => {
+            matches!(changed, Ok(()) | Err(_)) && *shutdown_rx.borrow()
+        }
+    }
+}
+
+async fn stream_meter(
+    config: &RemoteClientConfig,
+    short_name: &str,
+    stream: TcpStream,
+    shutdown_rx: &mut watch::Receiver<bool>,
+) -> RigResult<()> {
+    let (reader, mut writer) = stream.into_split();
+    let mut reader = BufReader::new(reader);
+
+    let envelope = build_envelope(
+        config,
+        ClientCommand::SubscribeMeter,
+        Some(short_name.to_string()),
+    );
+    let mut payload = serde_json::to_string(&envelope)
+        .map_err(|e| RigError::communication(format!("JSON serialize failed: {e}")))?;
+    payload.push('\n');
+    time::timeout(IO_TIMEOUT, writer.write_all(payload.as_bytes()))
+        .await
+        .map_err(|_| RigError::communication("meter subscribe write timed out".to_string()))?
+        .map_err(|e| RigError::communication(format!("meter subscribe write failed: {e}")))?;
+    time::timeout(IO_TIMEOUT, writer.flush())
+        .await
+        .map_err(|_| RigError::communication("meter subscribe flush timed out".to_string()))?
+        .map_err(|e| RigError::communication(format!("meter subscribe flush failed: {e}")))?;
+
+    loop {
+        tokio::select! {
+            changed = shutdown_rx.changed() => {
+                match changed {
+                    Ok(()) if *shutdown_rx.borrow() => return Ok(()),
+                    Ok(()) => {}
+                    Err(_) => return Ok(()),
+                }
+            }
+            line = read_limited_line(&mut reader, MAX_JSON_LINE_BYTES) => {
+                let line = line
+                    .map_err(|e| RigError::communication(format!("meter read failed: {e}")))?
+                    .ok_or_else(|| RigError::communication("meter connection closed".to_string()))?;
+                let trimmed = line.trim_end();
+                if trimmed.is_empty() {
+                    continue;
+                }
+                let update: MeterUpdate = match serde_json::from_str(trimmed) {
+                    Ok(u) => u,
+                    Err(e) => {
+                        warn!("Meter[{}]: bad frame: {}", short_name, e);
+                        continue;
+                    }
+                };
+                if let Ok(map) = config.rig_meters.read() {
+                    if let Some(tx) = map.get(short_name) {
+                        // `watch` keeps only the latest value; slow SSE
+                        // readers simply skip intermediate samples, which is
+                        // exactly the desired behaviour for a meter display.
+                        let _ = tx.send(Some(update));
+                    }
+                }
+            }
+        }
+    }
+}
+
 /// Satellite pass prediction refresh runs on a dedicated TCP connection so it
 /// never blocks state polls or user commands on the main connection.
 /// Fetches immediately on connect, then every 5 minutes.
@@ -1300,6 +1483,7 @@ mod tests {
                 rig_id_to_short_name: HashMap::new(),
                 short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
                 sat_passes: Arc::new(RwLock::new(None)),
+                rig_meters: Arc::new(RwLock::new(HashMap::new())),
             },
             req_rx,
             state_tx,
@@ -1344,6 +1528,7 @@ mod tests {
             rig_id_to_short_name: HashMap::new(),
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
         let envelope = super::build_envelope(&config, trx_protocol::ClientCommand::GetState, None);
         assert_eq!(envelope.token.as_deref(), Some("secret"));
@@ -1371,6 +1556,7 @@ mod tests {
             rig_id_to_short_name: HashMap::from([(Some("hf".to_string()), "home-hf".to_string())]),
             short_name_to_rig_id,
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
         // selected_rig_id is "home-hf" (short name), envelope should translate to "hf"
         let envelope = super::build_envelope(&config, trx_protocol::ClientCommand::GetState, None);
@@ -1402,6 +1588,7 @@ mod tests {
             rig_id_to_short_name: HashMap::new(),
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
         // Legacy mode: rig_id passes through unchanged
         assert!(!has_short_names(&config));
@@ -1428,6 +1615,7 @@ mod tests {
             ]),
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
         assert!(has_short_names(&config));
         assert_eq!(
@@ -1464,6 +1652,7 @@ mod tests {
             rig_id_to_short_name: HashMap::from([(Some("hf".to_string()), "gdansk".to_string())]),
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
         let snapshot = sample_snapshot();
         let rigs = vec![RigEntry {
@@ -1489,7 +1678,7 @@ mod tests {
     #[test]
     fn global_target_for_snapshot_skips_other_server_selection() {
         let snapshot = sample_snapshot();
-        let rigs = vec![RigEntry {
+        let rigs = [RigEntry {
             rig_id: "hf".to_string(),
             display_name: Some("Gdansk HF".to_string()),
             state: snapshot,
@@ -1536,6 +1725,7 @@ mod tests {
             rig_id_to_short_name: HashMap::from([(Some("hf".to_string()), "gdansk".to_string())]),
             short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
             sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
         };
 
         let ids = super::active_spectrum_rig_ids(&config);

src/trx-client/trx-frontend/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-frontend"
@@ -12,4 +12,5 @@ bytes = "1"
 uuid = { workspace = true }
 serde_json = { workspace = true }
 trx-core = { path = "../../trx-core" }
+trx-protocol = { path = "../../trx-protocol" }
 tokio = { workspace = true, features = ["sync"] }