State-Lifetime Decision

New state has a home whether you choose it or not — and the wrong home is a class of bug (forgets too soon, leaks across users, grows unbounded, serves stale). Decide scope × durability on purpose, run the four cross-cutting checks, and name the tradeoff.

Works with any agent. No vendor APIs. Reasons about your app's state and stores.

Supporting files (read when needed):

• decision-grid.md — the scope × durability grid, store mapping, the four checks
• decision-record-template.md — the short SDR output format

Output: {SKILL_OUTPUT_DIR}/state-lifetime-decision/ — see ../OUTPUT.md

Step 0 — Name the state

Establish (infer from the request; ask only if missing):