Diagnose

The core job is to build a reliable feedback loop. Without one, hypotheses are weak.

Phase 1: Feedback Loop

Create the smallest useful pass/fail signal:

• failing test;
• CLI command with fixture;
• HTTP request against local server;
• browser script;
• replayed trace or payload;
• small harness around the relevant function;
• repeated flake trigger with counted failure rate.

If no loop can be built, state what was tried and ask for logs, traces, access, or permission to instrument.

Phase 2: Reproduce