diff --git a/.claude/skills/release/SKILL.md b/.claude/skills/release/SKILL.md
index 235e320f..437f3643 100644
--- a/.claude/skills/release/SKILL.md
+++ b/.claude/skills/release/SKILL.md
@@ -7,10 +7,13 @@ description: Cut a Shipyard release (vX.Y.Z) - version bump, changelog, tag, and
 
 The tag is the release. Pushing `vX.Y.Z` runs `.github/workflows/release.yml`:
 
-1. **checks:** calls `ci.yml`: Go with `-race` and a real Chromium, shellcheck, the app's checks, tests and build, and the docs build. A tag skips the e2e suite. Nothing is built if any check fails.
-2. **tmux:** static tmux for Linux boxes (Docker, on a hosted runner). It runs in parallel with checks.
+1. **checks:** calls `ci.yml`: Go with `-race` and a real Chromium, shellcheck, the app's checks, tests and build, and the docs build. A tag skips the e2e suite. It runs alongside the builds; nothing is published if any check fails (the release stays a draft).
+2. **tmux:** static tmux for Linux boxes (Docker, on a hosted runner).
 3. **release:** builds `berth`/`berthd` archives for darwin and linux, amd64 and arm64, and makes a **draft** release.
-4. **macos:** the universal app, signed, notarized and stapled. It uploads the dmg and updater archive, then `latest.json` last, then publishes the release as Latest. This takes about 30 minutes.
+4. **macos** and **linux:** the universal Mac app (signed, notarized, stapled) and the Linux alpha. They upload their bundles and `latest.json` to the draft.
+5. **feed:** once the apps are built and the checks pass, merges the Linux entries into `latest.json` and publishes the release as Latest. About 15 minutes from the tag when the caches are warm.
+
+The builds restore caches `release-cache.yml` keeps warm on `main` (a tag's run reads only `main`'s caches): the Mac's Go build cache and the Mac and Linux apps' Rust dependencies. It runs when Go or Rust dependencies change and twice a week; run it by hand (`gh workflow run release-cache.yml`) before a release if it hasn't run in a week.
 
 Only people the "Release tags" ruleset lets through can push `v*` tags. An agent usually can't push a tag; prepare everything and give the user the command.
 
diff --git a/.github/workflows/release-cache.yml b/.github/workflows/release-cache.yml
new file mode 100644
index 00000000..844e74d1
--- /dev/null
+++ b/.github/workflows/release-cache.yml
@@ -0,0 +1,119 @@
+name: release-cache
+
+# Keeps the caches a release builds from warm on main, where a release's run
+# (release.yml, on a tag) finds them: a tag's run reads main's caches, not
+# other tags', and CI runs on pull requests, whose caches no tag sees.
+#
+#   mac:   the Go build cache for the Mac's binaries (berth-cli, berthd, the
+#          Linux berthds it carries), and the Rust dependencies of the
+#          universal app (Apple silicon and Intel)
+#   linux: the Rust dependencies of the Linux app's release build
+#
+# Each builds what the release builds, the same way, without signing or
+# bundling. It runs when the dependencies change, and twice a week: GitHub
+# drops a cache nobody has read for seven days.
+on:
+  push:
+    branches: [main]
+    paths:
+      - go.mod
+      - go.sum
+      - app/src-tauri/Cargo.toml
+      - app/src-tauri/Cargo.lock
+      - .github/workflows/release-cache.yml
+  schedule:
+    - cron: "17 4 * * 1,4"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release-cache
+  cancel-in-progress: true
+
+jobs:
+  mac:
+    runs-on: macos-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        with:
+          go-version-file: go.mod
+          cache: false
+      # A new entry each run, so the newest code's packages are what a
+      # release restores (by the go-mac-release- prefix).
+      - uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+        with:
+          path: |
+            ~/Library/Caches/go-build
+            ~/go/pkg/mod
+          key: go-mac-release-${{ hashFiles('go.sum') }}-${{ github.run_id }}
+          restore-keys: |
+            go-mac-release-${{ hashFiles('go.sum') }}-
+            go-mac-release-
+      - name: Build the Go binaries the app carries
+        run: |
+          set -euo pipefail
+          # As make app-binaries does for universal-apple-darwin, and its
+          # daemons target; the version stamp only changes the link.
+          out="$RUNNER_TEMP/go"
+          make daemons BIN="$out" TMUX=0
+          for arch in arm64 amd64; do
+            GOOS=darwin GOARCH=$arch go build -trimpath -o "$out/berth-cli-$arch" ./cmd/berth
+            GOOS=darwin GOARCH=$arch go build -trimpath -o "$out/berthd-$arch" ./cmd/berthd
+          done
+      - uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4.3.0
+        with:
+          version: 11
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: 22
+          cache: pnpm
+          cache-dependency-path: app/pnpm-lock.yaml
+      - run: rustup target add aarch64-apple-darwin x86_64-apple-darwin
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
+        with:
+          workspaces: app/src-tauri
+          shared-key: mac-release
+      - run: pnpm install --frozen-lockfile
+        working-directory: app
+      # The release's build (scripts/mac-release.sh, make app-build), with
+      # its features, for both architectures; no bundle, no signing.
+      - name: Build the app's Rust
+        working-directory: app
+        run: pnpm tauri build --target universal-apple-darwin --no-bundle
+
+  linux:
+    runs-on: ubuntu-22.04
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4.3.0
+        with:
+          version: 11
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: 22
+          cache: pnpm
+          cache-dependency-path: app/pnpm-lock.yaml
+      - name: Install the system libraries
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libxdo-dev libssl-dev libayatana-appindicator3-dev librsvg2-dev
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
+        with:
+          workspaces: app/src-tauri
+          shared-key: linux-release
+      - run: pnpm install --frozen-lockfile
+        working-directory: app
+      # The release build of the Linux app (scripts/linux-release.sh), no
+      # bundles.
+      - name: Build the app's Rust
+        working-directory: app
+        run: pnpm tauri build --no-bundle
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 07102e34..c6485fa5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -7,9 +7,15 @@ name: release
 # notarized and stapled (scripts/mac-release.sh), and adds the dmg, the
 # updater archive and latest.json, the feed installed apps update from. No
 # asset name carries a version, so releases/latest/download/<name> always
-# finds the newest. The checks job (all of ci.yml) must pass first. The
-# release job runs on omarchy, the owner's self-hosted
-# runner (ci/runner/), when the repository variable SELF_HOSTED is true.
+# finds the newest. The checks job (all of ci.yml) runs alongside the builds,
+# and the feed job publishes nothing unless it passes: until then the release
+# is a draft, which releases/latest/download/ and installed apps never see.
+# The release job runs on omarchy, the owner's self-hosted runner
+# (ci/runner/), when the repository variable SELF_HOSTED is true.
+#
+# The builds start from caches release-cache.yml keeps warm on main (a tag's
+# run reads main's caches, not other tags'): the Mac's Go build cache, and
+# the Rust dependencies of the Mac and Linux apps.
 #
 # The linux job builds the Linux desktop app, an alpha, for x86_64 on a
 # hosted Ubuntu runner (scripts/linux-release.sh): an AppImage, which updates
@@ -34,8 +40,9 @@ concurrency:
 jobs:
   # All of CI (ci.yml: Go with -race and a real Chromium, shellcheck, the
   # app's checks, tests, build and Playwright suite, the docs build) on the
-  # tagged commit. Nothing is built or published unless it passes, so a
-  # release needs no test run on a laptop.
+  # tagged commit. It runs while the release is built; nothing is published
+  # unless it passes (the feed job), so a release needs no test run on a
+  # laptop. A failure leaves a draft, which nobody is offered.
   checks:
     uses: ./.github/workflows/ci.yml
 
@@ -73,7 +80,7 @@ jobs:
           if-no-files-found: error
 
   release:
-    needs: [tmux, checks]
+    needs: [tmux]
     runs-on: ${{ (vars.SELF_HOSTED == 'true' && github.event_name == 'push' && github.actor == github.repository_owner) && fromJSON('["self-hosted","omarchy"]') || 'ubuntu-latest' }}
     permissions:
       contents: write
@@ -173,6 +180,24 @@ jobs:
           node-version: 22
           cache: pnpm
           cache-dependency-path: app/pnpm-lock.yaml
+      # main's warm caches (release-cache.yml): read here, never written,
+      # since a tag's caches serve no later tag.
+      - if: steps.published.outputs.published != 'true'
+        uses: actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+        with:
+          path: |
+            ~/Library/Caches/go-build
+            ~/go/pkg/mod
+          key: go-mac-release-${{ hashFiles('go.sum') }}-
+          restore-keys: |
+            go-mac-release-${{ hashFiles('go.sum') }}-
+            go-mac-release-
+      - if: steps.published.outputs.published != 'true'
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
+        with:
+          workspaces: app/src-tauri
+          shared-key: mac-release
+          save-if: false
       - name: Install tools
         if: steps.published.outputs.published != 'true'
         run: |
@@ -314,6 +339,11 @@ jobs:
           tar -xzf "$RUNNER_TEMP/minisign.tar.gz" -C "$RUNNER_TEMP" minisign-linux/x86_64/minisign
           sudo install -m 0755 "$RUNNER_TEMP/minisign-linux/x86_64/minisign" /usr/local/bin/minisign
           minisign -v
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
+        with:
+          workspaces: app/src-tauri
+          shared-key: linux-release
+          save-if: false
       - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: tmux
@@ -344,12 +374,13 @@ jobs:
           if-no-files-found: error
 
   feed:
-    # After the Mac and Linux jobs, whichever finished first: the Mac's
-    # latest.json gets the Linux entries, then the release becomes "latest".
-    # Runs when the Mac app is published even if the Linux build failed; then
-    # the feed stays the Mac's alone.
-    needs: [macos, linux]
-    if: ${{ !cancelled() && needs.macos.result == 'success' }}
+    # After the Mac and Linux jobs, whichever finished first, and the checks:
+    # the Mac's latest.json gets the Linux entries, then the release becomes
+    # "latest". Runs when the Mac app is built even if the Linux build
+    # failed; then the feed stays the Mac's alone. Never when a check failed:
+    # the release stays a draft.
+    needs: [macos, linux, checks]
+    if: ${{ !cancelled() && needs.macos.result == 'success' && needs.checks.result == 'success' }}
     runs-on: ubuntu-latest
     permissions:
       contents: write