loops!Build Until Green
Run the production build, fix compile and bundling errors, and loop until the build succeeds.
by loops!
Use loop copies the kickoff. Share copies the loop link. Open in Cursor / Claude Code only pre-fill that prompt — they do not install hook files. Download loop saves a README and kickoff into .cursor/loops/build-until-green/ — no hooks required. How it works
- Do not modify the check command or exit criteria to force success
- Do not skip, disable, or bypass checks to pass the exit condition
- If stuck after several iterations, stop and report blockers instead of gaming metrics
- Do not weaken, delete, or skip tests to make the suite pass
- Do not replace real assertions with trivial always-pass tests
- Prefer fixing production code over patching tests to go green
Two separate pieces
- Kickoff prompt — tells the agent the goal, check command, exit condition, and how to self-pace between passes.
- 1
Copy or open the kickoff prompt
Click Use loop to copy the kickoff into your clipboard. Open in Cursor and Open in Claude Code only open the agent with that prompt — they do not configure automation for you.
- 2
Paste into your coding agent
Start a chat in Cursor, Claude Code, Codex, or any agent. Paste the kickoff. The prompt includes the goal, iteration limit, shell check, and first step.
- 3
Agent self-paces until done
The agent runs the loop: act → run check command → read output → repeat until the exit condition is met or max iterations is reached. No install step is required for prompt-only loops.
Full guide with Cursor /loop notes: How to install loops
1. Run build
Run the project build command and capture all errors.
npm run build
2. Fix build errors
Fix compile, type, and bundling errors one at a time. Prefer minimal diffs.
3. Re-run build
Run the build again and confirm errors are resolved.
npm run build
Start the "Build Until Green" loop. Goal: production build succeeds Max iterations: 10 Between iterations run: npm run build Exit when: npm run build exits 0 Step 1: Run the build. If it fails, fix the first error, then repeat until green. Self-pace this loop. After each iteration, run the check command, read the output, and only continue if the exit condition is not met. Stop when the exit condition passes or max iterations is reached. Give a short status update each pass.
Related loops
Start the "Ship PR Until Green" loop. Goal: PR is open with all CI checks passing Max iterations: 10 Between iterations run: gh pr checks Exit when: all PR checks are success Step 1: Implement the change, test locally, push, open PR, and fix CI until green. Self-pace this loop. After each iteration, run the check command, read the output, and only continue if the exit condition is not met. Stop when the exit condition passes or max iterations is reached. Give a short status update each pass.
Install and run the "Pre-Commit Guard" loop. Goal: block git commits when tests are failing. Between iterations run: npm test Exit when: tests exit 0 before each commit. Step 1: Before any git commit, run tests. Fix failures before committing.
Start the "Flaky Test Triage" loop. Goal: classify failing tests as flaky vs real and fix only real regressions Max iterations: 5 Between iterations run: npm test -- --testPathPattern=<failing-suite> Exit when: every failure is classified and real regressions are fixed or explicitly deferred Step 1: Run the failing suite multiple times. Classify each failure, fix real ones, and document flaky behavior. Self-pace this loop. After each iteration, run the check command, read the output, and only continue if the exit condition is not met. Stop when the exit condition passes or max iterations is reached. Give a short status update each pass.