# Improve Metric Accuracy for Issues, PRs, and Review Distribution

## 1. What the change is
This PR refactors the `open_issues.ts` and `open_prs.ts` metric scripts to use the GitHub GraphQL API's `totalCount` field instead of relying on the CLI's `gh issue list` command with a hardcoded limit. It also updates `review_distribution.ts` to include `COLLABORATOR` in the maintainer association check.

## 2. Why it is recommended
The current implementation of `open_issues.ts` and `open_prs.ts` used `--limit 1000`, which caused metrics to be capped at 1000 even when the actual backlog was much larger (~2400 issues). This provided a misleading view of repository health and the true scale of the backlog. Using GraphQL `totalCount` ensures accurate counts regardless of list size.

Additionally, `review_distribution.ts` was inconsistently excluding `COLLABORATOR` associations, which could lead to an inaccurate representation of review work distribution if many maintainers are designated as Collaborators. This led to a `review_distribution_variance` of 0 in recent runs.

## 3. Which metric or aspect of productivity is expected to be improved
- **open_issues**: Will now reflect the true total count (expected to jump from 1000 to ~2400).
- **open_prs**: Will reflect the true total count of open pull requests.
- **review_distribution_variance**: Will more accurately reflect how review work is shared among all maintainers (including collaborators).

## 4. By how much the metric is expected to improve
The `open_issues` metric is expected to increase by approximately **140%** (from 1000 to ~2400) once accurate data is collected. The `review_distribution_variance` is expected to become non-zero, providing a real baseline for monitoring reviewer workload balance.

tools/gemini-cli-bot/metrics/scripts/latency.ts

@@ -31,10 +31,18 @@ try {
   }
   `;
   const output = execSync(
-    `gh api graphql -F owner=${GITHUB_OWNER} -F repo=${GITHUB_REPO} -f query='${query}'`,
-    { encoding: 'utf-8' },
+    'gh api graphql -F owner=$OWNER -F repo=$REPO -f query=@-',
+    {
+      encoding: 'utf-8',
+      input: query,
+      env: { ...process.env, OWNER: GITHUB_OWNER, REPO: GITHUB_REPO },
+    },
   );
-  const data = JSON.parse(output).data.repository;
+  const response = JSON.parse(output);
+  if (response.errors) {
+    throw new Error(response.errors.map((e: any) => e.message).join(', '));
+  }
+  const data = response.data.repository;
 
   const prs = data.pullRequests.nodes.map(
     (p: {