release: a tag builds nothing and carries a changelog instead

Step 7 of M314, the last one. Rule 22 — the old path comes out completely.

## A release stops building

`desktop.yml` no longer triggers on `v*`, and its two `Publish release` steps
are gone. `ci.yml` lost its tag trigger in step 6. So a tag now reaches exactly
one lane: the new `release.yml`, which builds nothing.

That is not a simplification for its own sake. The merge to `main` already
published everything a user can receive — `:latest` + `:<sha>`, both channel
feeds, the updater manifest. A tag rebuilding that source produces identical
artifacts under identical names and re-pushes `:<sha>` with different bytes,
which rule 145 forbids even when they match.

## So what a release is FOR

The changelog (note 3127 §5). Two halves to "what am I running", and the
version answers only the first: which build is this (the footer, /api/config,
the APK's versionName) and what is in it that was not in the one I ran last
month (nothing, until now).

`packaging/release-notes.sh` derives it from git rather than a hand-maintained
CHANGELOG, which drifts into recording what someone MEANT to ship. Capped at 60
entries with the omitted count stated — the first dated release spans 181
commits since `v0.1.0`, and a truncated list that does not say it is truncated
is a lie.

It publishes through `publish-release.sh` rather than making its own API calls,
for the create-or-PATCH-on-409 path: a fixed-tag release that only ever POSTs
keeps whatever body its first run wrote, which is #2182, and reimplementing that
correctly in a second place is how it comes back.

## Retired

`MANIFEST_TAG` and the whole branch behind it. It let the manifest live on a
`stable` pointer release while the bundles sat on a versioned one — a split step
3 removed when `stable` started holding its own bundles. Nothing had passed it
since; a parameter that can only ever receive its own default is a branch nobody
exercises and a comment that goes stale, and its stale text was still telling
readers the installable builds live on the versioned releases.

`desktop/src-tauri/Cargo.toml`'s version and `thoughtsync/__init__.py`'s both
now say out loud that they are not shipped values. The Cargo one carries the
history worth keeping: the old scheme took its base from that line, so `0.2.<run>`
on dev outranked a bare `0.2.0` on main, and the remedy was "remember to bump the
minor before tagging" — documented in a comment, enforced nowhere. #2183 is what
that looked like in the field. **That ritual is now formally dead**, and this is
the deliberate act of killing it rather than a side effect.

## Still there on purpose

`install.sh`'s transitional stable fallback. It cannot go until `main` has
published to `stable` at least once, and that is gated on an operator request.
Removing it now would break the DEFAULT install channel.

#3147

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.forgejo/workflows/desktop.yml

@@ -25,12 +25,11 @@ on:
     # one. That is a ~15s container for a decision, against a lane that cannot
     # silently fail to run.
     branches: [dev, main]
-    tags: ["v*"]
   workflow_dispatch:
 
 concurrency:
   group: desktop-${{ github.ref }}
-  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/tags/') }}
+  cancel-in-progress: true
 
 permissions:
   # write (not read) so the tag build can publish a Release with the bundles
@@ -52,7 +51,7 @@ jobs:
   # from "we derived a stale value that happens to match" unless something checks.
   decide:
     name: Build, or is the channel already serving this?
-    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
+    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main'
     runs-on: python-ci
     container:
       image: git.fabledsword.com/bvandeusen/ci-python:3.14
@@ -69,15 +68,6 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ github.token }}
         run: |
-          # A tag has no channel to compare against and still builds bundles until
-          # step 7 retires that lane. Always build, never skip.
-          case "${{ github.ref }}" in
-            refs/tags/*)
-              echo "Tag build — no channel to compare against."
-              echo "build=true" >> $GITHUB_OUTPUT
-              exit 0
-              ;;
-          esac
           case "$GITHUB_REF_NAME" in
             main) channel=stable ;;
             *)    channel=dev ;;
@@ -252,17 +242,6 @@ jobs:
           # failure, not as a green run with an empty artifact.
           if-no-files-found: error
 
-      # Tag builds only: publish a real, versioned Fabled-Git Release with the
-      # AppImage + .deb attached — the stable fetch target the install script and
-      # the in-app updater consume (Actions artifacts above are ephemeral/test).
-      # Cutting the tag is the operator's action (rule 2); this only publishes a
-      # Release for a tag that already exists. Dormant on dev/main pushes.
-      - name: Publish release
-        if: startsWith(github.ref, 'refs/tags/v')
-        env:
-          GITHUB_TOKEN: ${{ github.token }}
-        run: bash desktop/packaging/publish-release.sh
-
       # The rolling channel for this branch: `dev` from dev, `stable` from main. Both
       # are releases whose tag never moves, so the updater has a permanent URL to
       # read — Forgejo has no /releases/latest/download/<asset> route, so "newest"
@@ -391,15 +370,6 @@ jobs:
           path: target/x86_64-pc-windows-msvc/release/bundle/nsis/*.exe
           if-no-files-found: error
 
-      # Publishes to the SAME release as the Linux job. Safe to run twice: the
-      # script reuses an existing release (409) and nullglob means each job uploads
-      # only the bundles present in its own workspace.
-      - name: Publish release
-        if: startsWith(github.ref, 'refs/tags/v')
-        env:
-          GITHUB_TOKEN: ${{ github.token }}
-        run: bash desktop/packaging/publish-release.sh
-
       # The rolling channel for this branch: `dev` from dev, `stable` from main. Both
       # are releases whose tag never moves, so the updater has a permanent URL to
       # read — Forgejo has no /releases/latest/download/<asset> route, so "newest"
@@ -447,7 +417,7 @@ jobs:
   manifest:
     name: Update manifest
     needs: [build, windows]
-    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
+    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main'
     runs-on: python-ci
     container:
       image: git.fabledsword.com/bvandeusen/ci-tauri:1.97
@@ -477,31 +447,17 @@ jobs:
           # match the binary it points at is an updater that never settles. It must
           # be `key`: this value is matched against bundle filenames.
           version="$(sh packaging/version.sh key desktop)"
-          # POSIX `case` (rule 81). For a tag, GITHUB_REF_NAME is the tag name, so
-          # the default arm is the tag path.
+          # Both channels are rolling: the manifest lands on the same release that
+          # holds the bundles, and the previous build's bundles are dropped once it
+          # points at this one. Nothing can reach them, and they are ~100 MB a push.
+          #
+          # No tag arm any more. A `v*` tag does not reach this workflow at all — it
+          # triggers release.yml, which writes a changelog and builds nothing.
           case "${GITHUB_REF_NAME}" in
-            dev|main)
-              # Both are rolling channels: the manifest lands on the same release
-              # that holds the bundles, and the previous build's bundles are dropped
-              # once it points at this one. Nothing can reach them, and they are
-              # ~100 MB a push.
-              case "${GITHUB_REF_NAME}" in
-                main) export RELEASE_TAG=stable
-                      export RELEASE_NOTES="Stable build from ${GITHUB_SHA}" ;;
-                *)    export RELEASE_TAG=dev
-                      export RELEASE_NOTES="Development build from ${GITHUB_SHA}" ;;
-              esac
-              export PRUNE_OLD_ASSETS=true
-              APP_VERSION="$version" bash desktop/packaging/write-manifest.sh
-              ;;
-            *)
-              # A versioned release gets its own manifest and NOTHING ELSE. It used
-              # to also write the `stable` pointer — that moved to main above, and
-              # two writers for one channel is a race with no winner worth having.
-              # The tag's build consequence goes entirely in M314 step 7; this only
-              # stops it fighting over `stable`.
-              export RELEASE_TAG="${GITHUB_REF_NAME}"
-              export RELEASE_NOTES="ThoughtSync ${GITHUB_REF_NAME}"
-              APP_VERSION="$version" bash desktop/packaging/write-manifest.sh
-              ;;
+            main) export RELEASE_TAG=stable
+                  export RELEASE_NOTES="Stable build from ${GITHUB_SHA}" ;;
+            *)    export RELEASE_TAG=dev
+                  export RELEASE_NOTES="Development build from ${GITHUB_SHA}" ;;
           esac
+          export PRUNE_OLD_ASSETS=true
+          APP_VERSION="$version" bash desktop/packaging/write-manifest.sh