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name: iterative-runner description: "Runs Claude in a retry loop until tests pass or task completes. Use for TDD loops, overnight builds, or any task needing repeated iteration until success. Triggers on: loop until done, keep trying, retry until pass, TDD loop, iterate until tests pass."

Iterative Runner

Runs Claude in a persistent loop that keeps retrying until tests pass or the task is complete.

When to Use

• Running TDD loops that iterate until all tests pass
• Overnight builds that need to keep trying until successful
• Any task requiring repeated attempts until completion criteria are met
• Automated retry for flaky or complex implementations

Core Concept

Copywhile :; do cat PROMPT.md | claude ; done

Keep iterating until task is complete.

Workflow

Step 1: Define Completion Criteria

Specify clear success conditions:

• All tests passing
• No linter errors
• Specific output marker (e.g., <promise>DONE</promise>)

Step 2: Set Safety Limits

Always use --max-iterations to prevent infinite loops.

Step 3: Run the Loop

Copy# Basic loop
iterative-runner "Build feature X" --completion-promise "DONE" --max-iterations 30

# TDD loop
iterative-runner "Implement feature using TDD.
1. Write failing test
2. Implement to pass
3. Run tests
4. Fix if failing
5. Repeat

Output <promise>DONE</promise> when all tests green." --max-iterations 50

Prompt Best Practices

1. Clear completion criteria - Define what "done" means
2. Incremental goals - Break into phases
3. Self-correction - Include retry logic
4. Escape hatch - Always use --max-iterations

Template

CopyImplement [FEATURE].

Requirements:
- [Requirement 1]
- [Requirement 2]

Success criteria:
- All tests passing
- No linter errors

After 15 failed iterations:
- Document blockers
- List attempted approaches

Output <promise>COMPLETE</promise> when done.