- boot-smoke: shutdown verdict now requires SIGTERM actually delivered and a
clean exit (code 0 or SIGTERM); EADDRINUSE port race retries with a fresh
port (3 attempts)
- test-changed: rename shouldForceFullSuite -> isSharedInfraChange (it routes
to gate mode, not full); run the changed-mode gate under the isolation guard
- workflows: least-privilege permissions (contents: read) on pr-checks and
full-suite
- decideExecutionPlan: implicit wide-blast reasons (missing base, diff failed,
no changes, shared infra, unmapped package) route to new gate mode instead of full
- CI===true force-full branch removed (CI no longer calls test-changed.mjs)
- changed mode runs pnpm test:gate before the affected set
- full suite reachable only via explicit --full / FUSION_TEST_FULL=1
- characterization tests updated + new only-explicit-full invariant test
