dist.sh builds versioned, signed artifacts for both apps from a git tag

(semver drives Android versionCode/versionName and package.json). The
build-image/ Dockerfile pins the same toolchain for a portable,
containerized Gitea Actions runner (build-image.sh builds and pushes
it) so releases don't depend on any one machine's local setup.
Pushing vX.Y.Z now builds and publishes a Gitea Release automatically.

.gitea/workflows/release.yml

@@ -0,0 +1,58 @@
+name: release
+
+# Push a tag matching vX.Y.Z (e.g. v1.2.3) to build and publish a release.
+# The tag drives the version — nothing to bump in source files beforehand.
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+
+jobs:
+  build:
+    # Needed to create the release and upload assets with GITEA_TOKEN below,
+    # regardless of this instance's default Actions permission mode.
+    permissions:
+      contents: write
+    # Must match a label your act_runner is registered with. The runner's
+    # own default label-image is irrelevant here since `container:` below
+    # overrides the actual build image per-job.
+    runs-on: ubuntu-latest
+    container:
+      # :latest — always the most recently pushed build-image.sh output.
+      # Pin to a specific tag here (see build-image/VERSION) if you need a
+      # release build to be reproducible against an exact toolchain image.
+      image: cr.ladkau.de/schwert-und-magie/builder:latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Write release signing credentials
+        run: |
+          set -euo pipefail
+          echo "${{ secrets.RELEASE_KEYSTORE_B64 }}" | base64 -d \
+            > SchwertUndMagieOnPebbleCompanionApp/release.keystore
+          printf '%s\n' "${{ secrets.RELEASE_KEYSTORE_PROPERTIES }}" \
+            > SchwertUndMagieOnPebbleCompanionApp/keystore.properties
+
+      - name: Build artifacts
+        run: |
+          set -euo pipefail
+          VERSION="${{ gitea.ref_name }}"
+          VERSION="${VERSION#v}"
+          VERSION="$VERSION" ./dist.sh
+
+      - name: Create release and upload artifacts
+        run: |
+          set -euo pipefail
+          API="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}"
+          AUTH="Authorization: token ${{ secrets.GITEA_TOKEN }}"
+
+          RELEASE_ID="$(curl -sf -X POST "$API/releases" \
+            -H "$AUTH" -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${{ gitea.ref_name }}\", \"name\": \"${{ gitea.ref_name }}\"}" \
+            | jq -r .id)"
+
+          for f in dist/*; do
+            curl -sf -X POST "$API/releases/$RELEASE_ID/assets?name=$(basename "$f")" \
+              -H "$AUTH" -F "attachment=@$f"
+          done

.gitignore

@@ -32,3 +32,6 @@ local.properties
 *.jks
 *.keystore
 keystore.properties
+
+# Container registry push credentials for build-image.sh. See docs/publish.md.
+registry.env

README.md

@@ -38,9 +38,18 @@ SchwertUndMagieOnPebbleWatchApp/      Pebble watchapp (C + PebbleKit JS)
 SchwertUndMagieOnPebbleCompanionApp/  Android companion app (Kotlin + NDK)
 versions/                             Original .d64 disk images (4 disks)
 docs/                                 Architecture notes and diagrams
-dist/                                 Built APKs (gitignored)
+build-image/                          Dockerfile for the release build environment
+dist/                                 Build artifacts (gitignored) — see dist.sh
 ```
 
+Run `./dist.sh` to build release artifacts for both apps in one step:
+`dist/schwert-und-magie-<version>.{aab,apk,pbw}` — the signed Android AAB
+(Play Store), APK (sideload), and Pebble `.pbw` (Rebble / direct install).
+Requires the Android release keystore to already be configured
+(`docs/publish.md` §2.1-2.3). The version comes from the current git tag by
+default (`git tag v1.2.3`); see `docs/publish.md` §4 for pushing that tag to
+trigger an automated, containerized build via Gitea Actions instead.
+
 ## How it works
 
 Three processes cooperate across two devices:
@@ -135,6 +144,28 @@ ensure register consistency — see `docs/architecture.md §4.4`.
 See [`docs/publish.md`](docs/publish.md) for keystore setup, Google Play,
 F-Droid, and Rebble submission.
 
+### Automated releases (Gitea Actions)
+
+Pushing a tag `vX.Y.Z` builds both apps in a containerized runner and
+publishes a Gitea Release with the versioned artifacts attached — see
+`docs/publish.md` §4. One-time setup:
+
+1. Build and push the build environment image (`./build-image.sh`, needs
+   `registry.env` — copy from `registry.env.example`).
+2. Register a self-hosted `act_runner` with a Docker executor.
+3. Add repo secrets under **Settings → Actions → Secrets**:
+
+   | Secret | Value |
+   |---|---|
+   | `RELEASE_KEYSTORE_B64` | `base64 -w0 SchwertUndMagieOnPebbleCompanionApp/release.keystore` |
+   | `RELEASE_KEYSTORE_PROPERTIES` | full contents of `SchwertUndMagieOnPebbleCompanionApp/keystore.properties` |
+
+   `GITEA_TOKEN` is injected automatically per job — nothing to add for it.
+4. `git tag v1.2.3 && git push origin v1.2.3`.
+
+Full details, including runner registration commands, are in
+`docs/publish.md` §4.
+
 ## License
 
 The watch app and companion app source code in this repository are released

build-image.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# Builds and pushes the release build environment image (build-image/Dockerfile)
+# to the container registry. The Gitea Actions release workflow pulls this
+# image to run dist.sh. Bump build-image/VERSION whenever the Dockerfile
+# changes so the workflow can pin a stable tag.
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+ROOT="$(pwd)"
+
+fail() { echo "PREFLIGHT FAIL: $*" >&2; exit 1; }
+
+command -v docker >/dev/null 2>&1 \
+    || fail "docker not found in PATH"
+
+[ -f "$ROOT/registry.env" ] \
+    || fail "registry.env not found — copy registry.env.example to registry.env and fill in your cr.ladkau.de credentials"
+
+# shellcheck disable=SC1091
+source "$ROOT/registry.env"
+
+: "${REGISTRY:?registry.env must set REGISTRY}"
+: "${REGISTRY_IMAGE:?registry.env must set REGISTRY_IMAGE}"
+: "${REGISTRY_USER:?registry.env must set REGISTRY_USER}"
+: "${REGISTRY_PASSWORD:?registry.env must set REGISTRY_PASSWORD}"
+
+VERSION="$(<"$ROOT/build-image/VERSION")"
+[ -n "$VERSION" ] || fail "build-image/VERSION is empty"
+
+echo "== Logging in to $REGISTRY =="
+echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY" -u "$REGISTRY_USER" --password-stdin
+
+echo "== Building $REGISTRY_IMAGE:$VERSION =="
+docker build \
+    -t "$REGISTRY_IMAGE:$VERSION" \
+    -t "$REGISTRY_IMAGE:latest" \
+    -f "$ROOT/build-image/Dockerfile" \
+    "$ROOT/build-image"
+
+echo "== Pushing $REGISTRY_IMAGE:$VERSION and :latest =="
+docker push "$REGISTRY_IMAGE:$VERSION"
+docker push "$REGISTRY_IMAGE:latest"
+
+echo "== Done =="
+echo "Image: $REGISTRY_IMAGE:$VERSION"

build-image/Dockerfile

@@ -0,0 +1,66 @@
+# Build environment for schwert_und_magie_on_pebble release artifacts:
+# Android SDK/NDK (companion app) + Pebble SDK (watch app), matching the
+# versions pinned in app/build.gradle.kts and validated on the maintainer's
+# dev machine. Rebuild and push with ../build-image.sh whenever a version
+# below, or the companion app's ndkVersion/compileSdk, changes.
+#
+# Does NOT contain the release keystore or any secrets — those are injected
+# at job runtime from Gitea Actions secrets, never baked into this image.
+FROM eclipse-temurin:21-jdk-jammy
+
+ARG ANDROID_CMDLINE_TOOLS_VERSION=11076708
+ARG ANDROID_PLATFORM=android-36
+ARG ANDROID_BUILD_TOOLS=36.1.0
+ARG ANDROID_NDK=30.0.14904198
+ARG PEBBLE_TOOL_VERSION=5.0.35
+ARG PEBBLE_SDK_CORE_VERSION=4.9.169
+ARG NODE_VERSION=24.16.0
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    ANDROID_HOME=/opt/android-sdk \
+    ANDROID_SDK_ROOT=/opt/android-sdk \
+    ANDROID_NDK_HOME=/opt/android-sdk/ndk/30.0.14904198 \
+    PATH=/root/.local/bin:/opt/android-sdk/cmdline-tools/latest/bin:/opt/android-sdk/platform-tools:${PATH}
+
+# git/unzip/curl/jq: checkout, SDK downloads, and the release workflow's
+# calls to the Gitea API (create release, upload assets).
+# python3-venv: pebble-tool's `sdk install` creates a venv per SDK version.
+# dos2unix/autoconf/automake/pkg-config/xa65/build-essential/gettext: host
+# tools required by the companion app's build_vice.sh (see that file's own
+# preflight check) to cross-compile VICE via autotools before NDK clang
+# takes over for the actual target compilation.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        curl ca-certificates git unzip tar xz-utils python3 python3-venv file jq \
+        dos2unix autoconf automake pkg-config xa65 build-essential gettext \
+    && rm -rf /var/lib/apt/lists/*
+
+# --- Android SDK: cmdline-tools, platform, build-tools, NDK ---
+RUN mkdir -p "$ANDROID_HOME/cmdline-tools" \
+    && curl -sSL -o /tmp/cmdline-tools.zip \
+        "https://dl.google.com/android/repository/commandlinetools-linux-${ANDROID_CMDLINE_TOOLS_VERSION}_latest.zip" \
+    && unzip -q /tmp/cmdline-tools.zip -d "$ANDROID_HOME/cmdline-tools" \
+    && mv "$ANDROID_HOME/cmdline-tools/cmdline-tools" "$ANDROID_HOME/cmdline-tools/latest" \
+    && rm /tmp/cmdline-tools.zip \
+    && yes | sdkmanager --licenses >/dev/null \
+    && sdkmanager --install \
+        "platform-tools" \
+        "platforms;${ANDROID_PLATFORM}" \
+        "build-tools;${ANDROID_BUILD_TOOLS}" \
+        "ndk;${ANDROID_NDK}" \
+        >/dev/null
+
+# Node.js: `pebble sdk install` below runs `npm install` for the SDK-core's
+# bundled webpack tooling — it does not bring its own node/npm, only the JS
+# deps themselves. Version matches what's validated on the maintainer's
+# machine; sdk-core's own bundled arm-none-eabi toolchain needs nothing extra.
+RUN curl -sSL -o /tmp/node.tar.xz \
+        "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz" \
+    && tar -xJf /tmp/node.tar.xz -C /usr/local --strip-components=1 \
+    && rm /tmp/node.tar.xz
+
+# --- Pebble SDK: pebble-tool + sdk-core ---
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
+    && /root/.local/bin/uv tool install "pebble-tool==${PEBBLE_TOOL_VERSION}" \
+    && /root/.local/bin/pebble sdk install "${PEBBLE_SDK_CORE_VERSION}"
+
+WORKDIR /workspace

build-image/VERSION

@@ -0,0 +1 @@
+1

dist.sh

@@ -0,0 +1,119 @@
+#!/usr/bin/env bash
+# Builds release artifacts for both apps and drops them in dist/, named
+# schwert-und-magie-<version>.{aab,apk,pbw}.
+#
+# Version comes from the current git tag (vX.Y.Z) by default — push a tag to
+# drive a release. Override with VERSION=1.2.3 ./dist.sh, or just run it
+# untagged for a local dev build (gets a 0.0.0-dev+<sha> placeholder version).
+#
+# Android output requires a release signing config — see docs/publish.md §2.1-2.3
+# (keystore.properties + release.keystore in SchwertUndMagieOnPebbleCompanionApp/).
+# Without it, Gradle still produces an unsigned/debug-signed build; that's not
+# fatal (useful for local testing) so it's a warning, not a hard stop.
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+ROOT="$(pwd)"
+DIST="$ROOT/dist"
+COMPANION="$ROOT/SchwertUndMagieOnPebbleCompanionApp"
+WATCH="$ROOT/SchwertUndMagieOnPebbleWatchApp"
+GRADLE_KTS="$COMPANION/app/build.gradle.kts"
+WATCH_PKG_JSON="$WATCH/package.json"
+
+fail() { echo "PREFLIGHT FAIL: $*" >&2; exit 1; }
+warn() { echo "WARNING: $*" >&2; }
+
+echo "== Preflight checks =="
+
+command -v pebble >/dev/null 2>&1 \
+    || fail "pebble CLI not found in PATH (needed to build the watch app)"
+
+[ -x "$COMPANION/gradlew" ] \
+    || fail "$COMPANION/gradlew missing or not executable"
+
+SDK_DIR="${ANDROID_SDK_ROOT:-${ANDROID_HOME:-}}"
+if [ -f "$COMPANION/local.properties" ]; then
+    LOCAL_SDK="$(sed -n 's/^sdk\.dir=//p' "$COMPANION/local.properties")"
+    [ -n "$LOCAL_SDK" ] && SDK_DIR="$LOCAL_SDK"
+fi
+[ -n "$SDK_DIR" ] && [ -d "$SDK_DIR" ] \
+    || fail "Android SDK not found (checked local.properties sdk.dir, \$ANDROID_SDK_ROOT, \$ANDROID_HOME)"
+
+NDK_VERSION="$(sed -n 's/.*ndkVersion *= *"\(.*\)".*/\1/p' "$GRADLE_KTS")"
+[ -n "$NDK_VERSION" ] \
+    || fail "could not read ndkVersion from app/build.gradle.kts"
+[ -d "$SDK_DIR/ndk/$NDK_VERSION" ] \
+    || fail "NDK $NDK_VERSION not installed under $SDK_DIR/ndk (Android Studio > SDK Manager > SDK Tools > NDK side by side)"
+
+[ -f "$COMPANION/res/vice-3.8.tar.gz" ] \
+    || fail "$COMPANION/res/vice-3.8.tar.gz missing (VICE source tarball required by the buildVice Gradle task)"
+compgen -G "$COMPANION/res/nibtools-*.tar.gz" >/dev/null \
+    || fail "$COMPANION/res/nibtools-*.tar.gz missing (nibtools source tarball required by the buildNibtools Gradle task)"
+
+# Signing config: missing/broken keystore.properties still builds (unsigned),
+# so warn here and rely on the post-build apksigner check for the real answer.
+if [ ! -f "$COMPANION/keystore.properties" ]; then
+    warn "keystore.properties not found — release build will likely be unsigned (see docs/publish.md §2.1-2.3)"
+else
+    STORE_FILE="$(sed -n 's/^storeFile=//p' "$COMPANION/keystore.properties")"
+    if [ -z "$STORE_FILE" ] || [ ! -f "$COMPANION/$STORE_FILE" ]; then
+        warn "keystore.properties found but its storeFile ('$STORE_FILE') does not exist — release build will likely be unsigned"
+    fi
+fi
+
+echo "== Resolving version =="
+
+if [ -z "${VERSION:-}" ]; then
+    if TAG="$(git describe --tags --exact-match --match 'v[0-9]*.[0-9]*.[0-9]*' 2>/dev/null)"; then
+        VERSION="${TAG#v}"
+    else
+        VERSION="0.0.0-dev+$(git rev-parse --short HEAD)"
+        warn "HEAD is not on a vX.Y.Z tag — building placeholder version $VERSION (push a tag to drive a real release version)"
+    fi
+fi
+[[ "$VERSION" =~ ^([0-9]+)\.([0-9]+)\.([0-9]+) ]] \
+    || fail "VERSION '$VERSION' is not a semantic version (expected X.Y.Z, optionally with a -pre+meta suffix)"
+VERSION_CODE=$(( ${BASH_REMATCH[1]} * 10000 + ${BASH_REMATCH[2]} * 100 + ${BASH_REMATCH[3]} ))
+echo "Version: $VERSION (Android versionCode $VERSION_CODE)"
+
+# Patch versions into the tracked source files for this build only, then
+# restore them — dist.sh must never leave the working tree dirty.
+restore_version_files() {
+    git -C "$ROOT" checkout -- "$GRADLE_KTS" "$WATCH_PKG_JSON" 2>/dev/null || true
+}
+trap restore_version_files EXIT
+
+sed -i \
+    -e "s/versionCode = [0-9]\+/versionCode = $VERSION_CODE/" \
+    -e "s/versionName = \"[^\"]*\"/versionName = \"$VERSION\"/" \
+    "$GRADLE_KTS"
+sed -i -e "s/\"version\": \"[^\"]*\"/\"version\": \"$VERSION\"/" "$WATCH_PKG_JSON"
+
+mkdir -p "$DIST"
+
+echo "== Android companion app =="
+cd "$COMPANION"
+./gradlew bundleRelease assembleRelease
+
+cp -f app/build/outputs/bundle/release/app-release.aab "$DIST/schwert-und-magie-$VERSION.aab"
+cp -f app/build/outputs/apk/release/app-release.apk "$DIST/schwert-und-magie-$VERSION.apk"
+
+echo "== Pebble watch app =="
+cd "$WATCH"
+pebble build
+
+cp -f build/SchwertUndMagieOnPebbleWatchApp.pbw "$DIST/schwert-und-magie-$VERSION.pbw"
+
+echo "== Verifying APK signature =="
+APK="$DIST/schwert-und-magie-$VERSION.apk"
+APKSIGNER="$(compgen -G "$SDK_DIR/build-tools/*/apksigner" | sort -V | tail -1 || true)"
+if [ -z "$APKSIGNER" ]; then
+    warn "apksigner not found under $SDK_DIR/build-tools — could not verify APK signature"
+elif ! "$APKSIGNER" verify "$APK" >/dev/null 2>&1; then
+    warn "$APK is UNSIGNED (failed apksigner verification) — not installable/publishable as-is"
+elif "$APKSIGNER" verify --print-certs "$APK" 2>/dev/null | grep -qi "CN=Android Debug"; then
+    warn "$APK is signed with the Android debug cert, not the release keystore"
+fi
+
+echo "== Done =="
+ls -la "$DIST"

docs/publish.md

@@ -89,14 +89,30 @@ the whole Gradle configuration.
 ### 2.4 Build the release bundle
 
 ```bash
-cd SchwertUndMagieOnPebbleCompanionApp
+./dist.sh   # builds both apps, copies signed artifacts into dist/
-./gradlew bundleRelease   # produces app/build/outputs/bundle/release/app-release.aab
-./gradlew assembleRelease # produces app/build/outputs/apk/release/app-release.apk, for sideload testing
 ```
 
-Play Store requires the **AAB** (`bundleRelease` output), not the APK — Play
+This runs `./gradlew bundleRelease assembleRelease` in
+`SchwertUndMagieOnPebbleCompanionApp/` and `pebble build` in
+`SchwertUndMagieOnPebbleWatchApp/`, then copies the outputs to
+`dist/schwert-und-magie.{aab,apk,pbw}`.
+
+Before building, the script hard-stops (nonzero exit, nothing written to
+`dist/`) if the `pebble` CLI, `gradlew`, the Android SDK, the NDK version
+pinned in `app/build.gradle.kts`, or the VICE/nibtools source tarballs are
+missing — these are required for the build to succeed at all. It warns but
+still builds if `keystore.properties` (§2.1-2.3) is missing or points at a
+nonexistent keystore file, and checks the resulting APK's signature with
+`apksigner` afterward, warning if it's unsigned or debug-signed. In practice
+an incomplete signing config also makes Gradle's own `signReleaseBundle` task
+fail outright, so `dist/` won't be overwritten with an unusable artifact
+either way — but don't rely on that as the primary check; heed the warning.
+
+Play Store requires the **AAB** (`schwert-und-magie.aab`), not the APK — Play
 re-packages per-device APKs from it (including ABI splits, so `arm64-v8a`/
-`x86_64` native VICE libraries each ship only to matching devices).
+`x86_64` native VICE libraries each ship only to matching devices). The APK
+(`schwert-und-magie.apk`) is for direct sideload distribution (§2.6 below)
+and F-Droid-style testing, not Play Store upload.
 
 ### 2.5 Play Console setup (one-time, per app listing)
 
@@ -119,12 +135,11 @@ re-packages per-device APKs from it (including ABI splits, so `arm64-v8a`/
 
 ### 2.6 Versioning for future releases
 
-Bump both fields in `app/build.gradle.kts` before every release build:
+Comes from the git tag automatically — see §4. Pushing `vX.Y.Z` (or running
-
+`VERSION=X.Y.Z ./dist.sh` locally) patches `versionCode` (derived as
-```kotlin
+`X*10000 + Y*100 + Z`, which strictly increases as long as X.Y.Z itself does)
-versionCode = 2      // must strictly increase on every Play Store upload
+and `versionName` in `app/build.gradle.kts` at build time, then reverts them —
-versionName = "1.1"  // user-visible, free-form
+no manual edit needed.
-```
 
 ## 3. Android companion app → F-Droid
 
@@ -220,8 +235,102 @@ includes the app in the next index update (published roughly weekly).
 ### 3.5 Versioning for F-Droid updates
 
 Each new release requires a new `Builds` entry in the metadata file with an
-incremented `versionCode` and the corresponding git commit or tag. `versionCode`
+incremented `versionCode` and the corresponding git commit or tag.
-must match the value in `app/build.gradle.kts`.
+`versionCode` must match what that tag produces — `X*10000 + Y*100 + Z` for
+tag `vX.Y.Z` (§2.6, §4).
+
+## 4. Automated releases via Gitea Actions
+
+Pushing a tag `vX.Y.Z` builds both apps and publishes a Gitea Release with
+`schwert-und-magie-X.Y.Z.{aab,apk,pbw}` attached — no local `./dist.sh` run
+needed. The tag is the only source of truth for the version; nothing needs to
+be bumped in source files beforehand (`dist.sh` patches `versionCode`/
+`versionName`/`package.json` at build time and reverts them — see §4.4 for
+running the same thing locally).
+
+The whole toolchain (Android SDK/NDK, Pebble SDK) lives in
+`build-image/Dockerfile`, built and pushed to a container registry by
+`build-image.sh`. This keeps the setup portable: the runner just needs Docker
+and pulls that image, so it isn't tied to any one machine's local toolchain
+install and can be moved or re-registered elsewhere without touching this
+repo's build scripts.
+
+### 4.1 Build environment image
+
+`build-image/Dockerfile` bakes in the Android SDK/NDK and Pebble SDK versions
+pinned in `app/build.gradle.kts`, matching what's validated for local builds.
+It does **not** contain the release keystore — that's injected at job runtime
+from Actions secrets (§4.3), never baked into the image.
+
+```bash
+cp registry.env.example registry.env   # fill in your registry credentials
+./build-image.sh                       # builds + pushes :latest and the pinned VERSION tag
+```
+
+Rebuild and push whenever `build-image/Dockerfile` changes (e.g. a Pebble SDK
+or Android NDK version bump) — bump `build-image/VERSION` first so the tag is
+meaningful. The workflow (§4.2) pulls `:latest` by default; if you need a
+release to be reproducible against an exact toolchain image, pin the `image:`
+line in `.gitea/workflows/release.yml` to the versioned tag instead.
+
+### 4.2 Runner setup (one-time)
+
+1. Enable Actions for the repo: repo Settings → Actions → enable, if not
+   already on by default for this Gitea instance.
+2. Generate a runner registration token: Site Admin → Actions → Runners (or
+   the repo/org-scoped equivalent) → "Create new runner".
+3. On any machine with Docker that can reach both your Gitea instance and
+   your container registry:
+   ```bash
+   # https://gitea.com/gitea/act_runner — grab the latest release binary
+   ./act_runner register --no-interactive \
+     --instance <your gitea URL> --token <token> \
+     --name <runner-name> --labels ubuntu-latest:docker://node:20-bookworm
+   ./act_runner daemon
+   ```
+   The image after `docker://` in `--labels` is only a fallback for jobs that
+   don't specify their own `container:` — irrelevant here since
+   `.gitea/workflows/release.yml` always pins its own image, but the runner
+   still needs a Docker-executor label registered to use that executor at
+   all. The label name itself (`ubuntu-latest` above) must match `runs-on:`
+   in `.gitea/workflows/release.yml` — edit both together if you rename it,
+   or reuse a label an existing runner already advertises (check Site Admin →
+   Actions → Runners) to skip registering a new one entirely.
+4. The runner's Docker daemon needs pull access to the registry — run
+   `docker login <registry>` once on that machine with the same credentials
+   as `registry.env`.
+
+### 4.3 Repo secrets
+
+Settings → Actions → Secrets, add:
+
+| Secret | Value |
+|---|---|
+| `RELEASE_KEYSTORE_B64` | `base64 -w0 SchwertUndMagieOnPebbleCompanionApp/release.keystore` |
+| `RELEASE_KEYSTORE_PROPERTIES` | the full contents of `SchwertUndMagieOnPebbleCompanionApp/keystore.properties` (§2.2) |
+
+`secrets.GITEA_TOKEN` (used to create the release and upload assets) is
+Gitea's own auto-generated per-job token — nothing to create or add yourself.
+`.gitea/workflows/release.yml` requests `contents: write` explicitly so
+release creation works regardless of this instance's default Actions
+permission mode.
+
+### 4.4 Cutting a release
+
+```bash
+git tag v1.2.3
+git push origin v1.2.3
+```
+
+Watch the run under the repo's Actions tab. On success, the release appears
+under the repo's Releases page with the three versioned artifacts attached.
+
+To build the same versioned artifacts locally without pushing a tag (e.g. to
+test before releasing):
+
+```bash
+VERSION=1.2.3 ./dist.sh
+```
 
 ## 5. Pebble watch app → Rebble app store / direct distribution
 
@@ -233,12 +342,19 @@ this repo and changes independently of it.
 
 ### 5.1 Build the artifact
 
+```bash
+./dist.sh   # also builds the Android side; see §2.4
+```
+
+or, to build just the watch app:
+
 ```bash
 cd SchwertUndMagieOnPebbleWatchApp
 pebble build   # produces build/SchwertUndMagieOnPebbleWatchApp.pbw
 ```
 
-The `.pbw` is the complete distributable — it bundles all target platforms
+`dist.sh` copies the result to `dist/schwert-und-magie.pbw`. The `.pbw` is
+the complete distributable — it bundles all target platforms
 (`aplite`/`basalt`/`chalk`/`diorite`/`emery`/`flint`/`gabbro`) declared in
 `package.json`. There is no signing step analogous to Android; Pebble apps
 are not cryptographically signed by the developer.
@@ -267,19 +383,21 @@ pebble screenshot --vnc --no-open docs/screenshots/emery.png
 
 ### 5.4 Versioning
 
-Bump `version` in `SchwertUndMagieOnPebbleWatchApp/package.json` before each
+Comes from the git tag automatically — see §4. `dist.sh` patches
-release build.
+`SchwertUndMagieOnPebbleWatchApp/package.json`'s `version` field at build
+time and reverts it afterward; no manual edit needed.
 
 ## 6. Pre-publish checklist
 
 - [ ] Release keystore generated, passwords saved in a password manager, both
       gitignored (§1, §2.1)
 - [ ] `keystore.properties` exists locally and is **not** tracked by git
-- [ ] `./gradlew bundleRelease` succeeds and installs/runs on a real device
+- [ ] `./dist.sh` (or a tag push, §4) succeeds and produces
-      from the resulting AAB (test via `bundletool` or Play internal testing)
+      `dist/schwert-und-magie-<version>.{aab,apk,pbw}`
+- [ ] AAB installs/runs on a real device (test via `bundletool` or Play
+      internal testing)
 - [ ] Play Console store listing content complete (icon, screenshots,
       privacy policy, content rating, data safety form)
 - [ ] F-Droid metadata YAML created and `fdroid build` passes locally (§3)
-- [ ] `pebble build` succeeds for all target platforms; `.pbw` sideloads and
+- [ ] `.pbw` sideloads and runs correctly against the signed companion app
-      runs correctly against the signed companion app build
+      build
-- [ ] `versionCode`/`versionName` (Android) and `version` (Pebble) bumped

registry.env.example

@@ -0,0 +1,6 @@
+# Copy to registry.env (gitignored, never commit the real values) and fill in.
+# Used by build-image.sh to push the build environment image to cr.ladkau.de.
+REGISTRY=cr.ladkau.de
+REGISTRY_IMAGE=cr.ladkau.de/schwert-und-magie/builder
+REGISTRY_USER=
+REGISTRY_PASSWORD=