MCP.so
Sign In
Debuggingmanual

Investigation Script Loop

Write a small throwaway script to reproduce a bug, run it, read output, and iterate until the root cause is proven.

Kickoff prompt

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.

Basic information

Category

Debugging

Goal

prove the root cause with a minimal repro script

Max iterations

8

Check command

node scripts/investigate.mjs

Exit when

script output demonstrates root cause

Supported agents

Cursor, Claude Code

Steps

  1. 1

    Write probe script

    Create a ~20-line script that reproduces the bug or queries the failing state. One file only.

  2. 2

    Run and read

    Execute the script and capture stdout/stderr. No guessing — read actual output.

  3. 3

    Adjust hypothesis

    Update the script or notes based on output. Stop when root cause is demonstrated.

More Debugging loops