fix(agents): replace gh CLI with curl for PR checking to prevent duplicate work

Agents do not have access to gh CLI, causing them to skip the pre-flight
PR check and collide on duplicate work. This replaces all gh-based PR
checking commands with curl + jq using the GitHub REST API, updates the
task claiming protocol to use branch push + started log file as the
primary lock mechanism, and updates automation scripts to use curl for
PR listing and git fetch for PR checkout.

Files updated:
- AGENTS.md (Section 12 coordination rules)
- CLAUDE.md (coordination rules)
- META_PROMPTS.md (daily + weekly meta prompts)
- daily-scheduler.md (pre-flight gate, task claiming, error handling)
- weekly-scheduler.md (pre-flight gate, task claiming, error handling)
- bitvid-pr-review-agent.md (PR enumeration + checkout)
- bitvid-ci-health-agent.md (CI run gathering)
- bitvid-weekly-synthesis-agent.md (PR metadata gathering)
- bitvid-changelog-agent.md (PR metadata verification)
- scripts/agent/review-open-prs.mjs (PR listing + checkout)
- scripts/automated-pr-review.mjs (--all mode PR listing + checkout)

https://claude.ai/code/session_01L5bzzGpZ6YTiLXcfqaL81G

scripts/agent/review-open-prs.mjs

@@ -13,18 +13,25 @@ function runCommand(command, args = [], options = {}) {
 }
 
 function getOpenPRs() {
-    console.log('Fetching open PRs...');
+    console.log('Fetching open PRs via GitHub API...');
     try {
-        const res = spawnSync('gh', ['pr', 'list', '--json', 'number,headRefName,baseRefName,url'], { encoding: 'utf-8' });
+        const res = spawnSync('curl', ['-s', 'https://api.github.com/repos/PR0M3TH3AN/bitvid/pulls?state=open&per_page=100'], { encoding: 'utf-8' });
         if (res.error) {
-            console.error('Error fetching PRs (gh CLI not installed?):', res.error.message);
+            console.error('Error fetching PRs (curl not available?):', res.error.message);
             return [];
         }
         if (res.status !== 0) {
             console.error('Error fetching PRs:', res.stderr);
             return [];
         }
-        return JSON.parse(res.stdout);
+        const apiPRs = JSON.parse(res.stdout);
+        // Map GitHub API response to the shape we need
+        return apiPRs.map(pr => ({
+            number: pr.number,
+            headRefName: pr.head.ref,
+            baseRefName: pr.base.ref,
+            url: pr.html_url
+        }));
     } catch (e) {
         console.error('Exception fetching PRs:', e);
         return [];
@@ -52,15 +59,16 @@ async function main() {
     for (const pr of openPRs) {
         console.log(`\n=== Processing PR #${pr.number}: ${pr.url} ===`);
         try {
-            // Checkout PR
-            runCommand('gh', ['pr', 'checkout', pr.number]);
+            // Checkout PR via git fetch
+            runCommand('git', ['fetch', 'origin', `pull/${pr.number}/head:pr-${pr.number}`]);
+            runCommand('git', ['checkout', `pr-${pr.number}`]);
 
             // Set Environment Variables
             const env = {
                 ...process.env,
                 PR_NUMBER: pr.number.toString(),
                 GITHUB_BASE_REF: pr.baseRefName,
-                // Assuming origin is the base repo or gh pr checkout handled the remote setup.
+                // Assuming origin is the base repo.
                 // automated-pr-review.mjs handles missing GITHUB_BASE_REPO_URL by defaulting to upstream/origin.
             };