From 1b3470861689e8aebe096d9c512dbc43d340823f Mon Sep 17 00:00:00 2001
From: Andrew Mao <andrewyxmao@gmail.com>
Date: Thu, 4 Jun 2026 15:09:35 -0700
Subject: [PATCH 1/2] caching added

---
 .github/actions/environment-setup/action.yml | 9 +++++++++
 .github/workflows/main.yml                   | 5 +----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/.github/actions/environment-setup/action.yml b/.github/actions/environment-setup/action.yml
index ff9cdc160b..0046bbddf3 100644
--- a/.github/actions/environment-setup/action.yml
+++ b/.github/actions/environment-setup/action.yml
@@ -30,3 +30,12 @@ runs:
       if: runner.os == 'macOS'
       run: |
         "${GITHUB_WORKSPACE}"/environment_setup/setup_software_mac.sh
+
+    - name: Cache Bazel disk cache
+      uses: actions/cache@v4
+      with:
+        path: ~/.cache/thunderbots_bazel_disk_cache
+        key: bazel-cache-${{ runner.os }}-${{ github.sha }}
+        restore-keys: |
+          bazel-cache-${{ runner.os }}-
+
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e557f2d2a5..ae18585ab5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -64,10 +64,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
-
-      - name: Environment Setup
-        run: |
-          "${GITHUB_WORKSPACE}"/environment_setup/setup_software.sh
+      - uses: ./.github/actions/environment-setup
         
       - name: Raspberry Pi Build
         run: |

From 9c3048fc60e6dad3b33ff0e03cc47621fdc6e75e Mon Sep 17 00:00:00 2001
From: Andrew Mao <andrewyxmao@gmail.com>
Date: Fri, 5 Jun 2026 15:53:28 -0700
Subject: [PATCH 2/2] Update CI workflows with caching rules and manual
 invalidation

---
 .github/actions/environment-setup/action.yml |  3 +-
 .github/workflows/main.yml                   | 61 +++++++++++++++++++-
 2 files changed, 62 insertions(+), 2 deletions(-)

diff --git a/.github/actions/environment-setup/action.yml b/.github/actions/environment-setup/action.yml
index 0046bbddf3..45b8a2e231 100644
--- a/.github/actions/environment-setup/action.yml
+++ b/.github/actions/environment-setup/action.yml
@@ -35,7 +35,8 @@ runs:
       uses: actions/cache@v4
       with:
         path: ~/.cache/thunderbots_bazel_disk_cache
-        key: bazel-cache-${{ runner.os }}-${{ github.sha }}
+        key: bazel-cache-${{ runner.os }}-${{ github.job }}-${{ github.sha }}
         restore-keys: |
+          bazel-cache-${{ runner.os }}-${{ github.job }}-
           bazel-cache-${{ runner.os }}-
 
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ae18585ab5..084cd928a8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -5,13 +5,64 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ master ]
+  schedule:
+    - cron: '0 8 * * *'  # 12 AM PST / 8 AM UTC
+  workflow_dispatch:
+    inputs:
+      clear_cache:
+        description: 'Clear cache before building'
+        required: false
+        type: boolean
+        default: true
+
+permissions:
+  actions: write
+  contents: read
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs:
+  check-and-clear-cache:
+    runs-on: ubuntu-24.04
+    outputs:
+      should_run: ${{ steps.check.outputs.should_run }}
+    steps:
+      - uses: actions/checkout@v4
+        if: github.event_name == 'schedule'
+        with:
+          fetch-depth: 50
+      - name: Check conditions and optionally clear cache
+        id: check
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          SHOULD_RUN=true
+          if [ "${{ github.event_name }}" == "schedule" ]; then
+            COMMITS=$(git log --oneline --since="24 hours ago")
+            if [ -z "$COMMITS" ]; then
+              echo "No commits in the last 24 hours. Skipping."
+              SHOULD_RUN=false
+            else
+              echo "Commits found in the last 24 hours. Clearing cache..."
+              gh extension install actions/gh-actions-cache || true
+              gh actions-cache delete --all --confirm || true
+              gh cache delete --all || true
+            fi
+          elif [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            if [ "${{ github.event.inputs.clear_cache }}" == "true" ]; then
+              echo "Manual trigger with clear_cache. Clearing cache..."
+              gh extension install actions/gh-actions-cache || true
+              gh actions-cache delete --all --confirm || true
+              gh cache delete --all || true
+            fi
+          fi
+          echo "should_run=$SHOULD_RUN" >> $GITHUB_OUTPUT
+
   multiplatform-build:
+    needs: check-and-clear-cache
+    if: needs.check-and-clear-cache.outputs.should_run == 'true'
     strategy:
       matrix:
         platform: [ ubuntu-24.04-arm ]
@@ -41,6 +92,8 @@ jobs:
 
 
   software-tests:
+    needs: check-and-clear-cache
+    if: needs.check-and-clear-cache.outputs.should_run == 'true'
     name: Software Tests
     runs-on: ubuntu-24.04
     steps:
@@ -60,6 +113,8 @@ jobs:
             -//software:unix_full_system_tar_gen
 
   robot-tests:
+    needs: check-and-clear-cache
+    if: needs.check-and-clear-cache.outputs.should_run == 'true'
     name: Robot Software Tests
     runs-on: ubuntu-24.04
     steps:
@@ -73,6 +128,8 @@ jobs:
 
 
   simulated-gameplay-tests:
+    needs: check-and-clear-cache
+    if: needs.check-and-clear-cache.outputs.should_run == 'true'
     name: Simulated Gameplay Tests
     runs-on: ubuntu-24.04
     steps:
@@ -107,6 +164,8 @@ jobs:
             /tmp/tbots/yellow/test/*/proto_*
 
   autorefd-game:
+    needs: check-and-clear-cache
+    if: needs.check-and-clear-cache.outputs.should_run == 'true'
     name: AutoRef'd Game (3 Minutes)
     runs-on: ubuntu-24.04
     steps: