Investigation Script Loop
Write a small throwaway script to reproduce a bug, run it, read output, and iterate until the root cause is proven.
// parameters
// run_this_loop
Copy the kickoff into your agent first. The blueprint below explains how the loop evaluates progress and when it should stop.
Use loop copies the kickoff prompt. Share copies the loop link. Open in Cursor / Claude only pre-fill that prompt — they do not install hook files. Download loop saves the loop as investigation-script-loop.md.
Start the "Investigation Script Loop" loop.
Goal: prove the root cause with a minimal repro script
Max iterations: 8
Between iterations run: node scripts/investigate.mjs
Exit when: script output demonstrates root cause
Step 1: Write a tiny throwaway script that reproduces the issue. Run it and iterate on what the output shows.
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.// blueprint
The loop contract: target outcome, execution sequence, checks, stopping condition, and safety constraints.
prove the root cause with a minimal repro script
// loop_sequence
Trigger
Manual start
Actions block
Feedback gate
Evaluate: state progress
Run the check, read the output, then decide whether the loop is complete.
Check failed
Repeat actions with the latest feedback.
Success
Root cause demonstrated by script output with a written summary
// steps
- 1Write probe script
Create a ~20-line script that reproduces the bug or queries the failing state. One file only.
- 2Run and read
Execute the script and capture stdout/stderr. No guessing — read actual output.
- 3Adjust hypothesis
Update the script or notes based on output. Stop when root cause is demonstrated.