Engine Prevention Loop

Timeline

1. 1

   Start

   Diagnosis

   Engine-health shows spin but loop doesn't convert it to prevention

2. 2

   15m

   gates.md

   Environment & Config Gate + Deploy Gate written with trigger/checklist/proof format

3. 3

   30m

   Ignition wired

   Spin Triage step added as §7, gates referenced at trigger moments in §3 ORIENTATION

4. 4

   45m

   Schema updated

   gate_checks + spin_triage added to session JSON schema

5. 5

   60m

   build-trends upgraded

   CATEGORY_GATE_MAP added — threshold categories now recommend specific gates, not just 'do something'

6. 6

   75m

   Validation live

   build-session warns if spin_triage missing; build-trends warns THRESHOLD UNHANDLED with gate name

7. 7

   90m

   Visual Debug Gate

   UI Layout threshold category gets its gate — overlay/breakpoint inspection before touching objectPosition

8. 8

   95m

   This retro

   Files spin_triage for all three outstanding threshold categories — clears UNHANDLED signals

What shipped

• .claude/rules/gates.md — triggered prevention checklists, one per spin class (Environment & Config Gate, Deploy Gate, Visual Debug Gate, Spin Triage)

• ignition.md §7 SPIN TRIAGE — named step between QUENCH and HARVEST; threshold rule defined (3+ sessions or 30+ min = gate required)

• ignition.md §3 ORIENTATION — gates referenced at trigger moments (before dep/env/config, before deploy)

• Session schema: gate_checks[] — proof a gate fired before the risky action (gate, trigger, checked_before_action, result, notes)

• Session schema: spin_triage{} — cross-session signal check (repeated_categories_checked, new_prevention_artifacts, classified_one_off, deferred_prevention)

• build-trends.mjs CATEGORY_GATE_MAP — each threshold category maps to a specific gate, destination, triggers, and checklist summary

• build-trends.mjs: THRESHOLD UNHANDLED signal — names the gate + destination when a category has no spin_triage entry

• build-session.mjs: spin_triage validation — warns at step 1 of retro if session has spins but no triage block

• engine-health.md: Threshold-Crossed Categories section — shows UNHANDLED vs accounted-for, plus recommended gate for each