feat(ci): use self-hosted zsh benchmark runner

- Run the main zsh benchmark on the self-hosted local-bench runner
- Keep the PR benchmark on macos-latest and scope git signing config to the workspace
- Add actionlint configuration for the local-bench label and clean benchmark temp files

Co-authored-by: Codex GPT-5.5 <noreply@openai.com>

Author: lemtoc

.github/actionlint.yaml

@@ -0,0 +1,3 @@
+self-hosted-runner:
+  labels:
+    - local-bench

.github/workflows/benchmark-pr.yml

@@ -22,8 +22,8 @@ jobs:
       - uses: ./.github/actions/setup-bench-env
         id: env
 
-      - name: Disable git commit signing
-        run: git config --global commit.gpgsign false
+      - name: Disable git commit signing in workspace
+        run: git config --local commit.gpgsign false
 
       - uses: ./.github/actions/run-benchmark
 
@@ -42,3 +42,10 @@ jobs:
           comment-always: true
           fail-on-alert: true
           summary-always: true
+
+      - name: Clean benchmark temporary files
+        if: always()
+        shell: bash
+        run: |
+          rm -rf "$RUNNER_TEMP/zsh-bench"
+          rm -f zsh-bench-result.txt benchmark-result.json

.github/workflows/benchmark.yml

@@ -1,6 +1,7 @@
 name: Zsh Interactive Benchmark
 
 on:
+  workflow_dispatch:
   push:
     branches: [main]
 
@@ -15,16 +16,32 @@ permissions:
 jobs:
   benchmark:
     name: Zsh Interactive Latency
-    runs-on: macos-latest
+    runs-on: [self-hosted, local-bench]
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v6
 
-      - uses: ./.github/actions/setup-bench-env
-        id: env
+      - name: Add local tool paths
+        shell: bash
+        run: |
+          {
+            echo "$HOME/.local/share/mise/shims"
+            echo "$HOME/.nix-profile/bin"
+            echo "/etc/profiles/per-user/$USER/bin"
+            echo "/run/current-system/sw/bin"
+            echo "/nix/var/nix/profiles/default/bin"
+            echo "/opt/homebrew/bin"
+            echo "/opt/homebrew/sbin"
+          } >> "$GITHUB_PATH"
 
-      - name: Disable git commit signing
-        run: git config --global commit.gpgsign false
+      - name: Warm local shell caches
+        shell: bash
+        run: |
+          zsh -i -c exit
+          bash .github/scripts/warm-zsh-startup-cache.sh
+
+      - name: Disable git commit signing in workspace
+        run: git config --local commit.gpgsign false
 
       - uses: ./.github/actions/run-benchmark
 
@@ -43,3 +60,10 @@ jobs:
           fail-on-alert: true
           summary-always: true
           alert-comment-cc-users: "@lemtoc"
+
+      - name: Clean benchmark temporary files
+        if: always()
+        shell: bash
+        run: |
+          rm -rf "$RUNNER_TEMP/zsh-bench"
+          rm -f zsh-bench-result.txt benchmark-result.json