feat: force overwrite core instruction files

app/git.js

@@ -20,6 +20,11 @@ export const SYNC_PATHS = [
   'CLAUDE.md',
   'GEMINI.md',
 ];
+const FORCE_SYNC_FILE_PATHS = [
+  '.github/copilot-instructions.md',
+  'CLAUDE.md',
+  'GEMINI.md',
+];
 const SYNC_TREE_PATHS = [
   '.codex/skills/triage-findings',
   '.claude/skills/triage-findings',
@@ -77,6 +82,15 @@ function copyTree(sourceRoot, repoDir, relDir) {
   return copied;
 }
 
+function copyFileOverwrite(sourceRoot, repoDir, relPath) {
+  const src = path.join(sourceRoot, relPath);
+  if (!fs.existsSync(src)) return null;
+  const dest = path.join(repoDir, relPath);
+  fs.mkdirSync(path.dirname(dest), { recursive: true });
+  fs.copyFileSync(src, dest);
+  return relPath;
+}
+
 export function getRepoState(repoDir, _spawnSync = spawnSync) {
   const run = makeRunner(_spawnSync);
   const headSha = readGitOutput(run, ['rev-parse', 'HEAD'], repoDir);
@@ -137,15 +151,18 @@ export async function commitAndPush(workspace, repoDir, _spawnSync = spawnSync,
         }
       }
 
+      // Force overwrite the direct instruction files first so the target repo always
+      // receives the action-owned versions even if the repo has drifted.
+      for (const relPath of FORCE_SYNC_FILE_PATHS) {
+        const copied = copyFileOverwrite(sourceRoot, repoDir, relPath);
+        if (copied) existingSyncPaths.add(copied);
+      }
+
       // Copy standalone action files into the target repo. Existing files are overwritten.
       for (const relPath of SYNC_PATHS) {
-        const src = path.join(sourceRoot, relPath);
+        if (FORCE_SYNC_FILE_PATHS.includes(relPath)) continue;
-        const dest = path.join(repoDir, relPath);
+        const copied = copyFileOverwrite(sourceRoot, repoDir, relPath);
-        if (fs.existsSync(src)) {
+        if (copied) existingSyncPaths.add(copied);
-          fs.mkdirSync(path.dirname(dest), { recursive: true });
-          fs.copyFileSync(src, dest);
-          existingSyncPaths.add(relPath);
-        }
       }
 
       if (existingSyncPaths.size > 0) {

app/git.test.js

@@ -159,11 +159,15 @@ describe('commitAndPush', () => {
     const repoDir = path.join(workspace, 'repo');
     fs.writeFileSync(path.join(repoDir, '.github/skills/triage-findings/SKILL.md'), 'stale');
     fs.writeFileSync(path.join(repoDir, 'CLAUDE.md'), 'stale');
+    fs.writeFileSync(path.join(repoDir, 'GEMINI.md'), 'stale');
+    fs.writeFileSync(path.join(repoDir, '.github/copilot-instructions.md'), 'stale');
 
     await commitAndPush(workspace, repoDir, makeSpawn(), sourceRoot);
 
     assert.equal(fs.readFileSync(path.join(repoDir, '.github/skills/triage-findings/SKILL.md'), 'utf8'), '.github/skills/triage-findings/SKILL.md');
     assert.equal(fs.readFileSync(path.join(repoDir, 'CLAUDE.md'), 'utf8'), 'CLAUDE.md');
+    assert.equal(fs.readFileSync(path.join(repoDir, 'GEMINI.md'), 'utf8'), 'GEMINI.md');
+    assert.equal(fs.readFileSync(path.join(repoDir, '.github/copilot-instructions.md'), 'utf8'), '.github/copilot-instructions.md');
   });
 
   it('recursively overwrites skill tree files from the action source', async () => {