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Use when something is slow — "why is this slow", "optimize this", "make it faster", jank, lag, a slow query, slow page load, slow render, slow build, high memory, a timeout. Not for correctness bugs; that's debug.
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Use on the first substantive work in a project MasterMind isn't set up for yet, when the user says "init", "initialize", "set up MasterMind", "onboard", "get me ready", or when no field pack matches the project's detected stack.
Use after a correction or review finding worth remembering, when standards may have drifted from the live ecosystem, when switching MasterMind to a new domain or stack, or when the user says "remember this", "learn from that", "level up", "update your knowledge".
Use when implementing any non-trivial feature, change, or fix — "build me X", "add this feature", "implement this", "make this work", "can you create". Covers new functionality, meaningful changes to existing code, and anything where quality matters. Not for a one-line diff — just do that.
Use when a bug isn't obvious, resists a quick fix, keeps coming back, or you're about to start guessing — "why is this broken", "this keeps happening", intermittent or flaky failures, a crash you can't explain, behaviour that makes no sense. Not for a typo or an obvious mistake.
Use when an internal package, module, or shared component has little or no usage documentation and people (or future AI sessions) keep using it wrong — "document this", "write docs for our library", onboarding someone onto an internal API, or handing a package to another team.
Use when work needs to survive losing context — before a /clear on a long task, when pausing something unfinished, when handing over to a teammate or the next session, or when the context window is filling up on multi-day work.
Basado en la clasificación ocupacional SOC
| name | perf |
| description | Use when something is slow — "why is this slow", "optimize this", "make it faster", jank, lag, a slow query, slow page load, slow render, slow build, high memory, a timeout. Not for correctness bugs; that's debug. |
Slowness has a real, measurable cause. The cardinal sin is optimizing by intuition — you'll spend effort on the wrong thing and maybe trade away correctness for nothing. Get data first.
EXPLAIN ANALYZE), request latency, bundle size, memory. No number, no optimizing. Write it
down; it's your before.engineering/active-field.md → the pack's performance
section); if the field has no pack, let the profile — not a checklist — name the suspect.core/rigor.md). A "faster" version that's subtly wrong is a regression.Run levelup (capture) to record the bottleneck class and its lesson in the active field's
lessons.md — including the wrong suspect you ruled out, so MasterMind doesn't re-profile it next
time. Report: before → after numbers, the cause, the fix, and the guard added.
debug (a wrong result) and not qa (proving it works) — this is make the correct thing fast.