Investigate

Investigate Issue

Overview

Diagnose the root cause of an issue autonomously. Propose candidate hypotheses, pick the most promising one, run discrete-outcome experiments, update probabilities with evidence, iterate. No user checkpoints. Final report recommends a fix; it does not apply one.

Context

Rules & Constraints

Instructions

1. Initialize
   • Create a task list covering the steps below.
   • Gather initial data: error messages, logs, relevant source files, reproduction steps.
2. Hypotheses Generation
   • Propose 3-7 candidate root causes with initial probabilities (sum ≈ 100%) and one-line reasoning each.
   • Print the initial "Hypothesis Board".
3. Experiment Loop (autonomous; no user checkpoints)
   • Pick the highest-probability untested hypothesis.
   • Design a discrete-outcome experiment; state what "Success" and "Failure" imply for the hypothesis.
   • Execute it (read code, run commands, inspect outputs). Keep any diagnostic edits isolated and revert them afterwards.
   • Record the outcome, adjust probabilities, append evidence to the Board.
   • Verify baseline is restored and print the updated Board.
   • Evaluate the termination condition (rule 5). If not met, repeat.
4. Final Report
   • Print the final Hypothesis Board with the winning hypothesis highlighted.
   • Summarize each experiment: what was tested, what was observed, what it proved.
   • Recommend a concrete fix (file, line, proposed change) — do NOT apply it.

Verification