feat(agent): fail-closed seat resolution under MOSAIC_AGENTS_DIR override (#46)

Owner decision after live verification of M18: an explicit agents-dir override that cannot resolve the named seat now refuses the launch (exit 4, names the seat and dir) instead of launching seatless and unbounded. Unsetting the override keeps the M13 plain governed TUI. MOSAIC_ROLES_DIR needs no symmetric change - the M18 gate already refuses unresolvable role contracts. Task suite 88 -> 90 (refusal + refusal-names-the-seat). TOOLS.md Agent section documents the refusal. Suites 24/90/14/17 + verify green.
2026-09-03 19:45:10 -05:00
parent ca8135d70c
commit d1d7b5598d
7 changed files with 52 additions and 2 deletions
@@ -27,3 +27,4 @@ Agent operation cycles: launch, work, verify, persist, hand off.
  overridden.
 - If a capability you need is missing, say so. Do not improvise a capability
  you were not granted.
+- End your turn with a timestamp.