From 5682a69017d19efbcc58e3b01575275daab693be Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Sat, 25 Oct 2025 19:38:01 -0500
Subject: [PATCH 1/2] =?UTF-8?q?=F0=9F=A4=96=20Optimize=20setup-cmux=20acti?=
 =?UTF-8?q?on=20with=20node=5Fmodules=20caching?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

_Generated with `cmux`_

Add node_modules directory caching to drastically reduce install times
when the lockfile hasn't changed. This caches the entire node_modules
folder in addition to bun's install cache, eliminating the need to
reinstall packages on every CI run.

Expected impact: Reduce bun install time from 5-7s to <1s when cache hits.
---
 .github/actions/setup-cmux/action.yml | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/.github/actions/setup-cmux/action.yml b/.github/actions/setup-cmux/action.yml
index ee3edb5147..f4b17b665c 100644
--- a/.github/actions/setup-cmux/action.yml
+++ b/.github/actions/setup-cmux/action.yml
@@ -8,13 +8,21 @@ runs:
       with:
         bun-version: latest
 
-    - name: Cache bun dependencies
+    - name: Cache node_modules
+      uses: actions/cache@v4
+      with:
+        path: node_modules
+        key: ${{ runner.os }}-node-modules-${{ hashFiles('**/bun.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-node-modules-
+
+    - name: Cache bun install cache
       uses: actions/cache@v4
       with:
         path: ~/.bun/install/cache
-        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+        key: ${{ runner.os }}-bun-cache-${{ hashFiles('**/bun.lock') }}
         restore-keys: |
-          ${{ runner.os }}-bun-
+          ${{ runner.os }}-bun-cache-
 
     - name: Cache Homebrew (macOS)
       if: runner.os == 'macOS'

From 67700df2fcc1ab3025b66218238ce613b2309863 Mon Sep 17 00:00:00 2001
From: Ammar <ammar+ai@ammar.io>
Date: Sat, 25 Oct 2025 19:40:42 -0500
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=A4=96=20Invalidate=20node=5Fmodules?=
 =?UTF-8?q?=20cache=20on=20Bun=20version/arch=20changes?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Include Bun version and runner architecture in cache key to ensure
node_modules cache is invalidated when the Bun runtime changes. This
prevents native module ABI mismatches that could cause subtle failures.
---
 .github/actions/setup-cmux/action.yml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/.github/actions/setup-cmux/action.yml b/.github/actions/setup-cmux/action.yml
index f4b17b665c..0b6d314fae 100644
--- a/.github/actions/setup-cmux/action.yml
+++ b/.github/actions/setup-cmux/action.yml
@@ -8,13 +8,18 @@ runs:
       with:
         bun-version: latest
 
+    - name: Get Bun version
+      id: bun-version
+      shell: bash
+      run: echo "version=$(bun --version)" >> $GITHUB_OUTPUT
+
     - name: Cache node_modules
       uses: actions/cache@v4
       with:
         path: node_modules
-        key: ${{ runner.os }}-node-modules-${{ hashFiles('**/bun.lock') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-bun-${{ steps.bun-version.outputs.version }}-node-modules-${{ hashFiles('**/bun.lock') }}
         restore-keys: |
-          ${{ runner.os }}-node-modules-
+          ${{ runner.os }}-${{ runner.arch }}-bun-${{ steps.bun-version.outputs.version }}-node-modules-
 
     - name: Cache bun install cache
       uses: actions/cache@v4