amethyst/BUILDING.md

Building Amethyst Desktop

This guide has everything any fork needs to build Amethyst from source and cut its own release: prerequisites, build commands, the CI release pipeline, the secrets it needs, the distribution channels, and one-time bootstrap steps.

Amethyst maintainers: the account-specific checklist for shipping the official build (Play Console upload, Zapstore zsp publish with our nsec, secret ownership) lives in RELEASE_OPS.md. This file stays fork-generic.

• Prerequisites
• Clone + first build
• Generated & vendored artifacts
• Per-format build commands
• Asset naming contract
• Release runbook
• Secrets the CI needs
• Distribution channels
• Bootstrap runbook (one-time)
• Troubleshooting installs
• Uninstall + state paths
• Incident response
• Fallback plans

---

Prerequisites

All platforms:

• JDK 21 (Zulu or Temurin recommended)
• Git

Platform-specific:

• macOS: Xcode Command Line Tools (xcode-select --install)
• Windows: WiX Toolset 3.x on PATH (for MSI). winget install WiXToolset.WiXToolset
• Linux (all): nothing extra for .deb; rpm + fakeroot for .rpm; appimagetool + desktop-file-utils for AppImage; flatpak + flatpak-builder for the Flatpak bundle (see desktopApp/packaging/flatpak/README.md)

Install Linux RPM tooling:

# Debian/Ubuntu
sudo apt-get install -y rpm fakeroot

# Fedora
sudo dnf install -y rpm-build

Install appimagetool locally (CI fetches its own — SHA-verified):

# Debian/Ubuntu — appimagetool calls desktop-file-validate on the .desktop entry
sudo apt-get install -y desktop-file-utils

curl -fsSL -o desktopApp/packaging/appimage/appimagetool-x86_64.AppImage \
  https://github.com/AppImage/appimagetool/releases/download/1.9.0/appimagetool-x86_64.AppImage
chmod +x desktopApp/packaging/appimage/appimagetool-x86_64.AppImage

---

Clone + first build

git clone https://github.com/vitorpamplona/amethyst.git
cd amethyst

# Dev loop (launches Amethyst Desktop)
./gradlew :desktopApp:run

# Package for current OS
./gradlew :desktopApp:packageDistributionForCurrentOS

---

Generated & vendored artifacts

Two build inputs are generated by tools but committed to the repo, so a normal build or release does not run either — Gradle just consumes the checked-in output. You only regenerate them under the specific conditions below, and each has its own guide:

Artifact	Committed at	Regenerate when	Guide
Material Symbols subset font	commons/src/commonMain/composeResources/font/material_symbols_outlined.ttf	You add/remove a MaterialSymbol("\uXXXX") codepoint in MaterialSymbols.kt, or bump the upstream font	tools/material-symbols-subset/README.md — run ./tools/material-symbols-subset/subset.sh
Arti (Tor) native libs	amethyst/src/main/jniLibs/*.so	You update the pinned Arti version, change the JNI wrapper, or want to reproduce the binaries	tools/arti-build/README.md

Material Symbols is mandatory after icon changes. The bundled font is a ~210-glyph subset; a new codepoint that isn't in it renders as tofu (□) at runtime. Regenerate and commit the .ttf alongside the MaterialSymbols.kt change. Reusing an existing codepoint needs no regeneration.

Both tools have their own prerequisites (fonttools/brotli for the font; a Rust toolchain + Android NDK 25+ for Arti) documented in their READMEs — they are not required to build Amethyst from the committed sources.

---

Per-format build commands

Artifact	Command	Output
macOS DMG (host arch)	./gradlew :desktopApp:packageReleaseDmg	desktopApp/build/compose/binaries/main-release/dmg/Amethyst-*.dmg
Windows MSI	./gradlew :desktopApp:packageReleaseMsi	desktopApp/build/compose/binaries/main-release/msi/Amethyst-*.msi
Linux .deb	./gradlew :desktopApp:packageReleaseDeb	desktopApp/build/compose/binaries/main-release/deb/amethyst_*.deb
Linux .rpm	./gradlew :desktopApp:packageReleaseRpm	desktopApp/build/compose/binaries/main-release/rpm/amethyst-*.rpm
Linux AppImage	./gradlew :desktopApp:createReleaseAppImage	desktopApp/build/appimage/Amethyst-*-x86_64.AppImage
Linux Flatpak	flatpak-builder over createReleaseDistributable output — see desktopApp/packaging/flatpak/README.md	desktopApp/build/flatpak/Amethyst-*-x86_64.flatpak (CI)
Windows .zip portable	See below (inline 7z)	—
Linux .tar.gz portable	See below (inline tar)	—

Inline portable archives (run after createReleaseDistributable):

./gradlew :desktopApp:createReleaseDistributable

# Linux tar.gz
VER=$(grep -E '^app\s*=' gradle/libs.versions.toml | head -1 | cut -d'"' -f2)
( cd desktopApp/build/compose/binaries/main-release/app \
  && tar czf "../../../../portable/amethyst-desktop-${VER}-linux-x64.tar.gz" Amethyst/ )

# Windows .zip (PowerShell)
Compress-Archive -Path desktopApp\build\compose\binaries\main-release\app\Amethyst `
  -DestinationPath "desktopApp\build\portable\amethyst-desktop-$env:VER-windows-x64.zip"

Cross-platform architecture note: jpackage cannot cross-compile. An Intel DMG must be built on macos-13 (x64); an ARM DMG must be built on macos-14 or later. CI runs both.

---

Asset naming contract

All GH Release assets follow:

amethyst-desktop-<version>-<family>-<arch>.<ext>

Where:

Field	Values
<version>	Tag stripped of leading vX.YY.ZZ
<family>	macos, windows, linux
<arch>	x64, arm64
<ext>	dmg, msi, zip, deb, rpm, AppImage, flatpak, tar.gz

Single source of truth: scripts/asset-name.sh. Package manager manifests (Homebrew cask, Winget) depend on this exact scheme — any change is a breaking contract.

Examples:

• amethyst-desktop-1.12.1-macos-x64.dmg
• amethyst-desktop-1.12.1-macos-arm64.dmg
• amethyst-desktop-1.12.1-windows-x64.msi
• amethyst-desktop-1.12.1-linux-x64.AppImage
• amethyst-desktop-1.12.1-linux-x64.flatpak

---

Reproducible Android builds

The release APKs are bit-for-bit reproducible: anyone can rebuild the exact bytes we ship (minus the signature) from the tagged source and confirm the artifact on F-Droid / Zapstore / GitHub was built from this code and nothing else. What makes that hold:

• Pinned toolchain. AGP, Kotlin, R8, and the Compose compiler are pinned in gradle/libs.versions.toml; the build targets JDK 21. R8 is deterministic for a fixed version + inputs, so the minified output is stable. Build with the same JDK 21 you see in BUILDING.md / CI.
• No build-time clock. Nothing injects System.currentTimeMillis() / build dates into BuildConfig (a Spotless rule bans the call in quartz and commons), and AGP normalizes ZIP entry timestamps, so two builds an hour apart are identical.
• Deterministic version name. generateVersionName only appends a branch suffix off feature branches; a release tag builds in detached-HEAD (or from a source tarball with no .git) resolve to the bare app version.
• No dependency-metadata blob. dependenciesInfo { includeInApk = false; includeInBundle = false } in amethyst/build.gradle.kts stops AGP from embedding the Google-encrypted dependency protobuf in the signing block — that ciphertext is non-deterministic.
• Reproducible native library. The bundled Tor (Arti) .so is the one binary we compile ourselves; it is built reproducibly from source (pinned Rust toolchain, locked deps, canonical build path). See tools/arti-build/README.md → "Reproducible builds". All other native libs (secp256k1, webrtc) are version-pinned Maven prebuilts and so are byte-identical by download.

Verify a release APK reproduces

# 1. Check out the exact released tag and build the same variant unsigned.
git checkout v1.12.1
./gradlew clean :amethyst:assembleFdroidRelease

# 2. Diff your unsigned build against the published APK, ignoring only the
#    signature (META-INF/*). apksigner + a zip-aware diff is the simplest check;
#    diffoscope gives a human-readable breakdown of any remaining delta.
diffoscope \
  amethyst/build/outputs/apk/fdroid/release/amethyst-fdroid-arm64-v8a-release-unsigned.apk \
  amethyst-fdroid-arm64-v8a-1.12.1.apk

A clean run shows differences confined to META-INF/ (the signing files). Any diff in classes*.dex, resources.arsc, or native libs means something in the toolchain drifted — file it before publishing.

---

Local SonarQube analysis (opt-in)

The build supports running a SonarQube analysis against a locally hosted server. It is off by default: unless you opt in, the scanner plugin is neither downloaded nor applied and the build is unaffected.

1. Install and start a local SonarQube server

Either run the official Docker image:

docker run -d --name sonarqube -p 9000:9000 sonarqube:community

or download the Community Build zip, unzip it, and start it (requires a JDK 17+ on PATH):

cd sonarqube-<version>
bin/macosx-universal-64/sonar.sh console   # pick the folder matching your OS

Once it reports up, open http://localhost:9000 (first login admin/admin, you'll be asked to change it), create a local project named Amethyst with project key Amethyst, and generate a project analysis token for it (Project Settings → Analysis Method → With Gradle, or My Account → Security → Generate token). The token looks like sqp_….

2. Point the build at your server

Add the server and token to local.properties (gitignored — the token never lands in the repo):

sonar.host.url=http://localhost:9000
sonar.token=sqp_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

3. Run the analysis

./gradlew sonar

When it finishes, browse the results at http://localhost:9000/dashboard?id=Amethyst.

4. Optional: include Android Lint results

The scanner auto-imports each Android module's lint report and shows the findings as external issues alongside Sonar's own. It only imports — it never runs lint itself — so without the reports on disk the analysis warns Unable to import Android Lint report file(s). Generate them first, then run the scan as a separate invocation (chaining lint and sonar in one Gradle call does not guarantee lint finishes first):

./gradlew :amethyst:lintPlayDebug :benchmark:lintBenchmark :nappletHost:lintDebug
./gradlew sonar

The reports persist under each module's build/reports/, so re-run lint only when you want fresh lint data in the next scan.

Every sonar.* entry in local.properties is forwarded to the scanner, so any analysis parameter can be set there. sonar.projectKey / sonar.projectName default to the root project name (Amethyst).

Even when opted in, the scanner plugin only loads on invocations that actually request the sonar task — ordinary builds and IDE syncs are unaffected (which is also why ./gradlew tasks doesn't list it).

Note: the SonarQube Gradle scanner plugin is LGPL-3.0. It is a build-time-only tool fetched after explicit opt-in; it is never linked into shipped artifacts.

---

Release runbook

The release flow is driven by a tag push. Every cut ships Android + Desktop + Quartz library in one pipeline.

1. Bump the app version and Android versionCode in gradle/libs.versions.toml (appCode is a monotonic integer — it must increment even when app is unchanged):

   [versions]
   app = "1.08.1"  # new semver
   appCode = "449" # Android versionCode
   

   amethyst/build.gradle.kts reads both from the catalog (versionCode = libs.versions.appCode.get().toInt()), so there is nothing else to edit.

2. Commit + tag + push:

   git commit -am "chore(release): 1.12.1"
   git tag -s v1.12.1 -m "Release 1.12.1"
   git push && git push --tags
   

3. Wait for the Create Release Assets workflow to finish (~25–30 min).

4. Verify:

   • GH Release contains 8 desktop assets + 12 Android assets
   • Asset sizes look sane (see §Enforce asset size budget — CI auto-fails at 1 GB/asset)
   • Intel + ARM DMGs both present
   • Android flow unchanged

5. Stable vs prerelease — a tag containing -rc, -beta, -alpha, -dev, or -snapshot is auto-classified as prerelease. Stable tags trigger the Homebrew + Winget bump workflows.

Dry-run (no tag push)

Use workflow_dispatch to exercise the full matrix without publishing:

gh workflow run create-release.yml \
  -f dry_run=true \
  -f test_tag=v0.0.0-dryrun \
  --ref feat/my-branch

Assets are built and size-checked, but not uploaded; bump workflows do not fire. Use for pre-merge validation of workflow changes.

Version constraint: tag must match libs.versions.toml

The first step in each build-desktop matrix job asserts:

tag (stripped of 'v') == gradle/libs.versions.toml [versions] app

If they drift, the workflow fails fast. Always bump the TOML first, then tag.

NEVER change Windows upgradeUuid

desktopApp/build.gradle.kts:upgradeUuid is the MSI product family GUID. Changing it breaks in-place upgrades for existing Windows users — they must uninstall before a new release. Leave it alone forever.

---

Secrets the CI needs

The Create Release Assets workflow reads these from GitHub repo secrets. A fork must provide its own values — none are inherited. (GITHUB_TOKEN is provided automatically; everything else you set yourself.)

Secret	What it is	Used for
SIGNING_KEY	Base64 of your Android keystore (.jks/.keystore)	Signs the Play + F-Droid AAB and APK
KEY_ALIAS	Keystore key alias	Same Android signing step
KEY_STORE_PASSWORD	Keystore password	Same
KEY_PASSWORD	Key password	Same
SONATYPE_USERNAME	Maven Central (Sonatype) user token name	Publishing the quartz library
SONATYPE_PASSWORD	Maven Central user token password	Same
SIGNING_PRIVATE_KEY	GPG/PGP private key, ASCII-armored	Signs the Maven artifacts (Central requires it)
SIGNING_PASSWORD	Passphrase for that GPG key	Same
MAC_CERTIFICATE_P12	Base64 of your Apple Developer ID Application cert (.p12, includes the private key)	Signs the macOS desktop DMG and the macOS amy jlink tarball
MAC_CERTIFICATE_PASSWORD	Password set when exporting the .p12	Imports the cert into the CI keychain
MAC_SIGN_IDENTITY	Full identity string, e.g. Developer ID Application: Your Name (TEAMID)	The codesign identity to sign with
MAC_NOTARY_APPLE_ID	Apple ID email of the notarization account	Apple notarization (notarytool)
MAC_NOTARY_PASSWORD	App-specific password for that Apple ID (not the login password)	Same
MAC_NOTARY_TEAM_ID	10-char Apple Developer Team ID	Same
HOMEBREW_TOKEN	PAT for Homebrew/homebrew-cask	Desktop cask bump (stable tags)
WINGET_TOKEN	PAT for microsoft/winget-pkgs	Desktop winget bump (stable tags)
CROWDIN_PERSONAL_TOKEN, CROWDIN_PROJECT_ID	Crowdin API creds	Translation sync (separate workflow, not the release)

Note the three distinct signing identities people often conflate: SIGNING_KEY + KEY_* is the Android keystore; SIGNING_PRIVATE_KEY + SIGNING_PASSWORD is the GPG key for Maven Central; MAC_CERTIFICATE_* + MAC_SIGN_IDENTITY + MAC_NOTARY_* is the Apple Developer ID for the macOS desktop DMG. They are unrelated — each comes from a different authority.

The macOS signing secrets are optional: if MAC_CERTIFICATE_P12 is unset the release workflow still builds the DMG and the macOS amy tarball, just unsigned (the previous behavior). Provision all six to switch signing + notarization on for both. Obtaining them requires Apple Developer Program membership ($99/yr). The same one certificate signs both artifacts.

The macOS amy tarball is the jlink image (bundled JRE), so signing it means codesigning every Mach-O binary in that runtime with hardened-runtime entitlements (cli/packaging/macos/amy.entitlements — needed so the JVM can load the secp256k1 native library it extracts at runtime). A loose .tar.gz cannot be stapled (Apple's stapler only handles .app/.dmg/.pkg), so Gatekeeper verifies notarization online on first run — fine for a CLI. Note the Homebrew-core jvm bundle (amy-<version>-jvm.tar.gz) is not signed: Homebrew removes the quarantine attribute on its own downloads.

Validated (Developer ID D77MCV9NZ7): signing every Mach-O in the bundled JRE with hardened runtime + amy.entitlements lets amy init derive a key via secp256k1 with no library-validation crash. Dropping disable-library-validation reproduces UnsatisfiedLinkError: … different Team IDs on the runtime-extracted libsecp256k1-jni.dylib — so that entitlement is load-bearing, not decorative.

Open risk — embedded jar natives. The notary service unpacks lib/*.jar recursively and checks every Mach-O for a signature + hardened runtime. Our sign loop only touches loose files, so 9 unsigned natives ride along inside jars on a macOS build: secp256k1 (1, required at runtime), jna (2), sqlite (2), and skiko (4, dead weight — Compose UI the CLI never renders). Whether notarytool returns Accepted or Invalid on these is unverified (the local validation had no notary creds). Decide it with one run: set the six MAC_* secrets and trigger create-release.yml via workflow_dispatch with dry_run=true — the sign+notarize step runs regardless of dry_run and now prints the per-file notary log on a non-Accepted verdict. If it comes back Invalid, the fix is to codesign the dylibs inside those jars before zipping (and/or strip the unused skiko/Compose jars from the CLI image — the :commons core/ui split the size budget already flags). The desktop app bundles the same jars through Compose/jpackage notarization, so run a desktop dry-run too; its in-jar handling differs and is likewise unverified.

Generating the values:

# Android keystore → base64 for SIGNING_KEY (one line, no wrapping)
keytool -genkey -v -keystore upload.jks -keyalg RSA -keysize 2048 \
  -validity 10000 -alias upload          # creates the keystore (once)
base64 -i upload.jks | tr -d '\n'        # paste output into SIGNING_KEY

# GPG key → armored private key for SIGNING_PRIVATE_KEY
gpg --full-generate-key                  # create the key (once)
gpg --armor --export-secret-keys <KEY_ID>   # paste output into SIGNING_PRIVATE_KEY

# Apple Developer ID Application cert → base64 for MAC_CERTIFICATE_P12.
# In Keychain Access, export the "Developer ID Application: ..." cert (with its
# private key) as a .p12, setting an export password (-> MAC_CERTIFICATE_PASSWORD).
base64 -i developer_id.p12 | tr -d '\n'  # paste output into MAC_CERTIFICATE_P12
security find-identity -v -p codesigning  # shows the exact MAC_SIGN_IDENTITY string
# MAC_NOTARY_PASSWORD is an app-specific password from https://appleid.apple.com
# (Sign-In and Security -> App-Specific Passwords), NOT your Apple ID login.

SONATYPE_USERNAME/SONATYPE_PASSWORD are a user token from https://central.sonatype.com (Account → Generate User Token), not your login. A fork that doesn't publish a library can drop the Publish Quartz Lib step and the four Sonatype/GPG secrets.

---

Distribution channels

One v* tag fans out to several channels. Which apply depends on where a fork distributes; the official Amethyst rollout for each is in RELEASE_OPS.md.

Channel	How it ships	Push or pull
GitHub Releases	The release workflow builds + signs all assets and attaches them to the tag's Release	Automatic (CI)
Maven Central	Same workflow runs publishAllPublicationsToMavenCentral for quartz	Automatic (CI)
Google Play	Download the signed amethyst-googleplay-<version>.aab from the GH Release and upload it in Play Console	Manual push
F-Droid	F-Droid's build server detects the new tag and builds the fdroid flavor from source per its recipe in the external fdroiddata repo, then signs + publishes itself	Pull (build-from-source)
Zapstore	The zsp CLI reads zapstore.yaml and publishes a Nostr software-release event signed with the app's nsec	Manual push (Nostr)
Homebrew + Winget	bump-homebrew.yml / bump-winget.yml open version-bump PRs on stable tags	Automatic (CI)

Two channels need the build to stay split into product flavors (see amethyst/build.gradle.kts → productFlavors):

• play carries Firebase / Google Play Services (push notifications, ML Kit, etc.) → the Google Play AAB.
• fdroid swaps those for UnifiedPush and no-op/open-source implementations (amethyst/src/fdroid/…) so the build is free of proprietary dependencies → what F-Droid builds and what Zapstore distributes.

F-Droid is pull, not push. We never upload to F-Droid; its server builds our tagged source. Keeping the fdroid flavor proprietary-free and the fastlane/metadata/android/ descriptions current is all that's required. F-Droid reads an optional per-release changelog from fastlane/metadata/android/en-US/changelogs/<versionCode>.txt.

---

Bootstrap runbook (one-time)

Secrets to provision in GitHub repo settings

The full secret inventory is in § Secrets the CI needs. The two that need the most setup care are the package-manager PATs, because of their token type and scope:

Secret	Purpose	Scope
HOMEBREW_TOKEN	Bump Homebrew cask	Fine-grained PAT — Homebrew/homebrew-cask only — Contents: write + Pull requests: write — 90d expiry
WINGET_TOKEN	Submit Winget manifests	Classic PAT — public_repo — 90d expiry (dedicated bot account preferred; vedantmgoyal9/winget-releaser does not support fine-grained)

Rotate both on a 90-day cadence. Owner: assigned via RELEASE_OPS.md or equivalent issue tracker. On rotation, paste new token and run gh workflow run bump-homebrew.yml on the most recent stable tag to verify.

Homebrew cask (one-time initial PR)

brew bump-cask-pr amethyst-nostr \
  --version 1.12.1 \
  --url "https://github.com/vitorpamplona/amethyst/releases/download/v1.12.1/amethyst-desktop-1.12.1-macos-arm64.dmg"

The cask filename is amethyst-nostr (not amethyst — that's taken by a tiling window manager). After the first PR is merged, bump-homebrew.yml auto-submits new version bumps on each stable release.

The desktop app is already on mainline Homebrew. homebrew/cask is the mainline cask repo — GUI apps live in homebrew-cask, CLIs in homebrew-core; both are "mainline." A private tap is only the fallback if Homebrew ever rejects the (now signed + notarized) cask.

Homebrew-core formula for the amy CLI (one-time initial PR)

The CLI goes to homebrew-core (mainline formulae), not homebrew-cask — casks are for GUI apps. homebrew-core builds in a network-sandboxed environment, so a from-source Gradle build can't resolve its Maven dependencies there. Instead the formula downloads the pre-built no-JRE jar bundle amy-<version>-jvm.tar.gz (published by create-release.yml) and depends_on "openjdk". The reference formula lives at cli/packaging/homebrew/amy.rb.

To submit:

# 1. Grab the published asset's sha256
curl -fsSL -o amy-jvm.tar.gz \
  https://github.com/vitorpamplona/amethyst/releases/download/v1.12.1/amy-1.12.1-jvm.tar.gz
shasum -a 256 amy-jvm.tar.gz

# 2. Fill the url + sha256 into cli/packaging/homebrew/amy.rb, then open the PR
brew create --set-name amy --tap homebrew/core \
  https://github.com/vitorpamplona/amethyst/releases/download/v1.12.1/amy-1.12.1-jvm.tar.gz
#    (paste the reference formula body, run `brew audit --new amy`,
#     `brew install --build-from-source amy`, `brew test amy`, then PR it.)

Caveats that the maintainer must weigh before submitting:

• Name collision. amy may already exist in homebrew-core — check with brew search amy first. If taken, fall back to amethyst-cli.
• Pre-built-jar scrutiny. homebrew-core prefers source builds; downloading a jar bundle is an accepted-but-reviewed pattern for JVM tools. Be ready to justify it (sandboxed Gradle can't fetch Maven deps).
• Bundle size. The bundle is ~70 MB today because :commons leaks Compose/Skiko jars onto the CLI classpath. Trimming that (a :commons core/ui split) would shrink it and smooth review — tracked as a follow-up.

After the formula merges, the livecheck block lets homebrew-core's BrewTestBot auto-open version-bump PRs on each stable release — no token or workflow on our side (unlike the cask/winget bumps).

Winget (one-time initial submission)

wingetcreate new \
  https://github.com/vitorpamplona/amethyst/releases/download/v1.12.1/amethyst-desktop-1.12.1-windows-x64.msi

Set PackageIdentifier = VitorPamplona.Amethyst. After the first manifest is merged into microsoft/winget-pkgs, bump-winget.yml auto-submits new version manifests.

---

Troubleshooting installs

macOS — Gatekeeper "damaged and can't be opened"

Amethyst Desktop is currently unsigned. First-time launch requires:

1. Right-click → Open on the app (don't double-click) — then click Open on the Gatekeeper dialog
2. Or: xattr -cr /Applications/Amethyst.app to strip quarantine
3. Or: System Settings → Privacy & Security → "Open Anyway" after a blocked launch

Recommended path: install via Homebrew (brew install --cask amethyst-nostr) — cask flow handles this seamlessly.

Windows — SmartScreen "Windows protected your PC"

Amethyst Desktop is currently unsigned (no Authenticode). First-time launch:

1. Click More info on the SmartScreen dialog
2. Click Run anyway

Alternatively use winget install VitorPamplona.Amethyst — winget install bypasses the UI dialog after accepting the installer's inherent trust.

Linux AppImage won't execute

chmod +x Amethyst-*.AppImage
./Amethyst-*.AppImage

On Fedora Silverblue / very minimal distros, FUSE might be missing. Use --appimage-extract-and-run:

./Amethyst-*.AppImage --appimage-extract-and-run

---

Uninstall + state paths

State is shared across install channels (DMG, Homebrew, MSI, Winget, .deb, .rpm, AppImage, tar.gz). Switching channels does not duplicate data but may expose downgrade migration risks — prefer a single install channel per machine.

Exception: Flatpak. The sandbox redirects XDG dirs into ~/.var/app/com.vitorpamplona.amethyst.Desktop/, so a Flatpak install keeps its own separate state and does not see (or risk downgrading) state written by any other channel.

OS	App location	State directories
macOS	/Applications/Amethyst.app	~/Library/Application Support/Amethyst ~/Library/Preferences/com.vitorpamplona.amethyst.desktop.plist ~/Library/Caches/Amethyst
Windows	%LOCALAPPDATA%\Amethyst or C:\Program Files\Amethyst	%APPDATA%\Amethyst %LOCALAPPDATA%\Amethyst
Linux (deb/rpm)	/opt/amethyst	~/.config/amethyst ~/.local/share/amethyst ~/.cache/amethyst
Linux (AppImage/tar.gz)	user-chosen	Same as above
Linux (Flatpak)	/var/lib/flatpak or ~/.local/share/flatpak	~/.var/app/com.vitorpamplona.amethyst.Desktop/

Uninstall:

• Homebrew: brew uninstall --cask amethyst-nostr && brew zap amethyst-nostr
• Winget: winget uninstall VitorPamplona.Amethyst
• .deb: sudo apt remove amethyst
• .rpm: sudo dnf remove amethyst
• AppImage / tar.gz: delete the file / extracted directory
• Flatpak: flatpak uninstall com.vitorpamplona.amethyst.Desktop (add --delete-data to also remove ~/.var/app/…)
• macOS .dmg: drag from /Applications to Trash, then delete state dirs manually

---

Incident response

Bad GH Release asset

1. Immediately mark release as prerelease (pauses bump workflows):

   gh release edit v1.08.1 --prerelease
   

2. Delete the bad asset:

   gh release delete-asset v1.08.1 amethyst-desktop-1.08.1-macos-arm64.dmg --yes
   

3. Rebuild locally or rerun the failing matrix job:

   gh run rerun <run-id> --failed
   

4. Flip back to stable once verified (re-fires bump workflows — confirm fix first):

   gh release edit v1.08.1 --prerelease=false
   

Bad build reached Homebrew

Preferred: ship a point release (e.g. v1.08.2) — users on v1.08.1 get the fix via brew upgrade.

Alternative: close the open PR in Homebrew/homebrew-cask before merge, or file a revert PR if already merged. Typical Homebrew turn-around: 1–2 days.

Bad build reached Winget

Winget manifests are append-only — no hard unpublish. Options:

1. Ship a point release (preferred — users upgrade via winget upgrade)
2. File a manifest-removal PR against microsoft/winget-pkgs. Moderator review: 24–72h.

User-facing communication

On any incident:

1. Edit the release body on GitHub with a warning banner + workaround
2. Pin a GH Issue with downgrade instructions per channel
3. Announce via Nostr relay + project social channels

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Fallback plans

macOS Intel runner retirement

GitHub's macos-13 runner will eventually be deprecated. Monitor https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners for the deprecation date. When it hits:

1. Drop the macos-13 matrix entry from .github/workflows/create-release.yml
2. Add a cross-arch build step on macos-14 using a bundled x64 JDK + jpackage --mac-signing-prefix shenanigans, OR accept that only Apple Silicon DMGs ship and direct Intel users to winget on a Parallels VM or to rebuild from source.
3. Update README install matrix to reflect the change.

Homebrew main-cask rejects unsigned app (post-Sept 1 2026)

Homebrew has committed to disabling unsigned casks in Homebrew/homebrew-cask on 2026-09-01. Before that date:

Option A (wiring done — needs Apple creds): The signing { sign.set(true) }

• notarization {} blocks are already in desktopApp/build.gradle.kts (gated on the AMETHYST_MAC_SIGN_IDENTITY env var), and the macOS leg of create-release.yml imports a Developer ID cert into a throwaway keychain and exports the signing/notary env. It all stays a no-op until the six MAC_*/notary secrets are provisioned (see § Secrets the CI needs) — until then the DMG builds unsigned. To turn it on: join the Apple Developer Program ($99/yr), create a Developer ID Application certificate, generate an app-specific password, and set the six secrets. The first signed+notarized DMG is best validated with a workflow_dispatch dry-run before a real tag.

Option B: Pivot to a private Homebrew tap:

# Create repo: vitorpamplona/homebrew-amethyst
# Update bump-homebrew.yml:
#   tap: vitorpamplona/amethyst
#   cask: amethyst-nostr
# Users install: brew tap vitorpamplona/amethyst && brew install --cask amethyst-nostr

Note: a private tap does NOT bypass Gatekeeper itself (macOS OS-level) — users still see the "unsigned developer" dialog. Tap only sidesteps Homebrew's internal policy.

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Follow-up channels (separate PRs)

• AUR (amethyst-desktop-bin) — blocked on AUR account ownership decision
• Scoop (Windows) — blocked on bucket strategy (own vs Extras)
• Flathub — deferred (moderate ongoing maintenance)