Canonical Build21 source ownership was explicitly accepted in one isolated rdmsm4x worktree, and the local coordinator now follows that lane without authorizing installation.

Tyrell Build21 owner receipt

• Time: 2026-09-14 15:05 EDT
• Coordinator host: rdmpw3275m
• Canonical source host: rdmsm4x
• Scope: coordination metadata and the recurring Tyrell/AGY monitor only; no Tyrell source, installed app, daemon, database, or canary runtime was changed from this host.

Changes

• Updated /Users/richh/.agent-coordination/checkins/codex-rdmpw3275m-tyrelld-build18-recovery-20260910.json from dispatch-only state to an explicit ownership receipt for codex@rdmsm4x/01a08a70.
• Recorded the sole worktree /Users/richh/dev/_handoff/tyrell-build21-memory-20260914/apps/Tyrell, branch codex/tyrell-build21-memory-20260914, base/HEAD 75e8ab6e598a6670e6b584b26ce3e3c7ef8637a5, receipt message 20260914-150056-FD681F34, and an eight-hour lease accepted at 15:00:31 EDT.
• Updated heartbeat automation finish-tyrell-build-16 through the Codex automation API. It remains ACTIVE every 15 minutes, retains failed-runs-only notifications, forbids Build20 relaunch, and now follows the accepted Build21 worktree while distinguishing ownership from a fix, build, install, or canary acceptance.
• Read and acknowledged coordination messages 20260914-150056-FD681F34 and 20260914-145257-3B00EED1.

Commands and verification

• Used agent_msg.zsh sync, read, and ack for the exact owner receipts.
• Edited the check-in with apply_patch, validated it with jq empty, and synchronized it through /Users/richh/dev/fleet/maintenance/scripts/fleet_checkin_sync.zsh on rdmsm4x.
• Local and canonical check-in hashes match: db065538873ad493143c308fae84d0ad712fb40046da34caed97ff9e50b229ee.
• Updated the monitor with the Codex automation API and re-read its TOML. It is ACTIVE, contains receipt 20260914-150056-FD681F34, no longer contains the stale dispatch-only ownership statement, and has SHA-256 5d2bfcfbd3d629c4e61a5ce1abc7ddeca6abfd8ec73904532894aaf3312a7895.
• Read-only Git verification on rdmsm4x found the expected branch and unchanged committed HEAD. Five source/test files are currently modified by the canonical task; there is not yet a distinct fix commit or artifact.
• A bounded task wait still showed canonical task 01a08a70-7b42-7ed1-aa30-1e3408453d0a active with no final response. No duplicate task or writer was created.

Backups and undo

• No separate backup was created for these additive, reversible coordination records. The prior synchronized check-in hash was 640ebf2ac81104728c26bcb72bd2aec35decdfada779f93ea4cc671c520f09b5; the prior automation hash was ecd6f3f7d43dd95ca4a6769c86e0d45452c0a7fb4e210e9a36ff0826cf45a9f5.
• To undo, revert the ownership fields in the JSON check-in with apply_patch, run the canonical fleet check-in sync, and update the heartbeat prompt through the Codex automation API. Do not edit the automation TOML directly.

Outstanding work

• The canonical owner must finish the allocator diagnosis, produce a distinct reviewed fix commit, run the full reproducible test suite, and create a signed/notarized Build21-or-later artifact before any install is considered.
• A newer artifact must pass exact rollback preflight and the complete fresh R11-or-successor canary sequence on rdmbair15m5; Build20 remains rejected.
• AGY Track B remains monitor-only because every discovered parent is complete or closed and there is no real provider quota-reset boundary or eligible unfinished parent.
• Canary Apple Notes receipt request 20260914-144418-56B0DF3B still needs an explicit remote reply.