* fix(#3127): make state.begin-phase idempotent on mid-flight phases
Root cause: cmdStateBeginPhase() unconditionally overwrote execution-
progress fields regardless of current phase status. When execute-phase
called it on a phase already mid-flight (--wave N resume), it regressed:
- Current Plan to 1 (from e.g. 3)
- Last Activity Description to 'context gathered; ready for plan-phase'
- Plan: N of M body line to 'Plan: 1 of M'
- last_updated timestamp to an older value
- progress.percent could decrease
Fix: read Status field before writing. If phase is already executing
(Status: Executing Phase N), skip execution-progress fields and only
update fields safe on resume:
- Last Activity date (always safe)
- Resume-specific 'execution resumed (wave continue)' activity line
First-time execution (Status != Executing Phase N) writes all fields
as before -- no regression on the normal path.
Regression test: 4 real unit tests using synthetic STATE.md files:
- mid-flight phase does not reset Current Plan (was the bug)
- mid-flight phase does not overwrite stopped_at narrative
- fresh phase sets Current Plan to 1 (normal path, no regression)
- both paths update Last Activity date (safe field)
Suite: 6990/6990. Closes#3127.
* fix(lint+state): allow-test-rule, escapeRegex phaseNumber in idempotency guard
