merge origin/main into feat/wf5-securestorage

Brings MOSAIC_GIT_IDENTITY (per-seat git authorship) onto the delivery
branch, which had none of it. The branch carried W-F7's FLEET_SEAT seam in
the same launcher file; the two auto-merged cleanly.

Three single-hunk conflicts resolved:
- pr-merge.sh: kept branch policy allowing main OR next (next is the
  release stream).
- test-ci-queue-wait-tristate.sh: kept the branch's 4 added merge-readiness
  assertions; merge base and main both had zero, so nothing of main's is
  reverted.
- package.json test:framework-shell: union of both enumerations, 50 entries,
  no test dropped from either side. Picks up main's test-start-agent-session.sh
  and test-fleet-units.sh, which are the guards for the identity key.

.woodpecker/ci.yml

@@ -46,6 +46,28 @@ steps:
       # [0] of the pnpm chain, so severing that chain would silence it together
       # with everything it guards; this direct line keeps one instrument running.
       - bash packages/mosaic/framework/tools/quality/scripts/check-test-enumeration.sh
+      # Tool-index gate: a shipped wrapper that appears in no resident index doc
+      # is undiscoverable from inside a session, and an agent that cannot learn a
+      # wrapper exists reaches for raw curl instead — which is how a Gitea review
+      # got filed PENDING three times. Ships-and-documented is one commit, or red.
+      - bash packages/mosaic/framework/tools/quality/scripts/check-tools-index.sh --self-test
+      - bash packages/mosaic/framework/tools/quality/scripts/check-tools-index.sh
+      # Hermetic regression for issue-close.sh (#1081): mocks tea/curl onto PATH
+      # and sandboxes a throwaway git repo, so it resolves no real credentials and
+      # joins CI directly rather than the exclusions file.
+      - bash packages/mosaic/framework/tools/git/test-issue-close-fail-closed.sh
+      # Hermetic behavioural regression for the PreToolUse wrapper guard: proves
+      # it still blocks the three mistakes AND still lets reads, unwrapped
+      # endpoints and ordinary commands through. Both directions are asserted —
+      # a guard that over-blocks gets routed around, which fails just as hard.
+      - bash packages/mosaic/framework/tools/git/test-wrapper-guard.sh
+      # Hermetic regression for mosaic-worktree.sh at fleet scale: stubs git onto
+      # PATH so `list` faces ~450 KB of porcelain. The defect it pins is invisible
+      # at small size — `git … | awk '…exit'` gives the producer SIGPIPE, which
+      # under `set -euo pipefail` aborts the caller silently with rc=141 and no
+      # output. A repo only reaches that once it has enough worktrees, so the
+      # stub supplies the scale instead of the host's own checkout.
+      - bash packages/mosaic/framework/tools/git/test-mosaic-worktree-large-repo.sh
 
   # Blocking gate (#791): a framework upgrade must never write or delete an
   # operator-owned path. The HARD GATE proves an unanticipated operator sentinel