rdmpw3275m-changelog-20260921-1414-issue-20260911-11-tyrellbar-restart-xpcproxy

Verified and resolved ISSUE-20260911-11: TyrellBar canary launchd xpcproxy transient retry loop.

Scope

Verified fix commit 1165c89a8f105c997c3633b33ba0d65a7bf09231 (PR #27, merge b2e45d04cb4154321a79f672fc841f702a60bf01) in apps/Tyrell on rdmsm4x.
In scripts/lib/tyrell_app_lifecycle.zsh, tyrell_app_restart_loaded_bar_agent retries within the bounded readiness loop when the observed executable is exactly /usr/libexec/xpcproxy during launch transition, avoiding premature fail-closed rollbacks while still failing immediately on any unexpected executable.
Executed tyrellbar_agent_restart_contract_test.zsh: 16 passed, 0 failed (testing xpcproxy-transition, xpcproxy-stuck, delayed-pid, path-alias, and fail-closed rollbacks).
Executed tyrellbar_agent_identity_contract_test.zsh: 16 passed, 0 failed.
Confirmed live canary retry 2 evidence in docs/release-evidence/build18-canary-20260911/HANDOFF.md verified embedded app execution.
Resolved ticket ISSUE-20260911-11 in dev/issues, committed (8c427a6), and pushed to fleet and backup.
Broadcasted issue-20260911-11-resolved via agent_msg.zsh.

zsh Tests/ScriptTests/tyrellbar_agent_restart_contract_test.zsh: 16 passed, 0 failed.
zsh Tests/ScriptTests/tyrellbar_agent_identity_contract_test.zsh: 16 passed, 0 failed.
ticket resolve ISSUE-20260911-11: exit 0, moved to resolved/ and HTML synced.
git push fleet main && git push backup main: pushed to both remotes cleanly.

git -C ~/dev/issues revert 8c427a6
In apps/Tyrell, git revert 1165c89 (not recommended as it re-introduces xpcproxy launch race).