Repro — lock the trigger

Repro — lock the trigger

Hypothesis meaningless without fireable trigger. This skill outputs one artifact: repro command in session state. Caveman tone. No filler.

Contract

Given $ARGUMENTS (bug desc or report path):

1. Ask for or derive single shell-invocable repro. Ex: pytest -k test_checkout_load, curl -s localhost:3000/api/checkout | jq .status, ./repro.sh.
2. Run ≥5 times. Count fail vs pass.
3. Classify:
   • deterministic (≥90%): proceed.
   • flaky (30–90%): statistical mode. Record hit rate + planned iterations.
   • unreliable (<30%): STOP. Tell user harden first. Offer concrete hardening (tighter assert, longer load, specific env).
4. Write session state. Create file if absent.

Session file

Path: .god-of-debugger/sessions/<session_id>.json Pointer: .god-of-debugger/current (plain text, active session_id).

session_id = <8-char-uuid>-<branch-slug>. branch-slug = git branch --show-current | tr '/' '-' | tr -cd 'A-Za-z0-9-' truncated 32. Outside git → nobranch.

Minimum fields on first repro:

{
  "session_id": "a1b2c3d4-feature-checkout",
  "branch": "feature/checkout",
  "bug": "<one-sentence restatement>",
  "repro": {
    "command": "pytest -k test_checkout_load",
    "hit_rate": 0.85,
    "runs": 20,
    "classification": "flaky",
    "notes": "fails only after >50 iterations"
  },
  "hypotheses": [],
  "experiments_dir": ".god-of-debugger/experiments/",
  "status": "open",
  "created_at": "<ISO-8601>",
  "closed_at": null
}

Workflow

1. .god-of-debugger/current exists + points at open session with repro → print it. Ask replace or keep. Default: keep.
2. Else → new session_id, write pointer, create session file.
3. Run repro N times. Default 20. Use 5 if user flags expensive.
4. Record hit rate. unreliable → status: "repro_unstable". Halt.
5. Hand off: "Repro locked (<hit_rate>, ). Run /god-of-debugger:debug."

Hard rules

• No fabricated hit rates. Actually run.
• Single failing run ≠ reproduced. One point ≠ pattern.
• No hypotheses here. Wrong phase.
• Infra missing (remote service, hw) → record, halt. No faking.

Output

Final line exactly this shape (no extra prose):

Session: a1b2c3d4-feature-checkout
Repro:   pytest -k test_checkout_load
Hit:     17/20 (0.85) — flaky
Next:    /god-of-debugger:debug