Tyrell task state was isolated from canonical main after its Codex executor failed, preserving every uncommitted file while leaving the project recoverable.

Tyrell task handoff recovery

• Recorded: 2026-08-30T12:40:16-0400
• State-changing host: rdmsm4x
• Initiating agent: codex@rdmpw3275m
• Scope: Codex task 01a04277-a949-77f1-8f07-57ff6a8ff90f (tyrell main) and the canonical Tyrell Git worktree set on rdmsm4x
• Reason: the established task failed code-mode-host negotiation three times, including for /bin/echo; a same-host worktree handoff was attempted to recover task execution without creating a competing project writer.

State changed

• Codex handoff operation exec-75b1cc7b-c83f-41a1-bac3-86febe51617b created /Users/richh/.codex/worktrees/5a0b/Tyrell.
• The new worktree uses branch codex/tyrell-main at eff529380e8c173ada39eaaad244264078a7031c.
• The previously dirty documentation/gallery delta was transferred into that isolated worktree. Modified files observed there: ARCHITECTURE.md, CHANGELOG.md, FEATURE_MATRIX.md, ISSUES.md, KICKOFF.md, README.md, STATUS.md, design/led-matrix/gallery/index.html, docs/brainstorm/2026-08-24-llmroo-planning-notes.md, docs/handoff-session-86816e7d-20260826.md, docs/superpowers/specs/2026-08-24-tyrell-day1-design.md, and docs/tyrell-project.html.
• Canonical /Users/richh/dev/apps/Tyrell main is clean at the same commit.
• git stash list is empty; recovery does not depend on an unnamed stash.
• Existing named iOS/CloudKit worktrees and their dirty deltas were left in place.
• The Git handoff completed, but the app could not create/switch to the destination task. The original task remains bound to /Users/richh/dev/apps/Tyrell.
• One bounded retry in the original task still failed before /bin/echo with timed out negotiating with the code-mode host; it made no additional Git, source, build, device, install, or deployment changes.

Verification evidence

• git -C /Users/richh/dev/apps/tyrell worktree list --porcelain
• git -C /Users/richh/dev/apps/tyrell stash list --date=iso-strict
• git -C <each-worktree> status --porcelain=v1 --branch
• Codex handoff status revision 15: worktree/Git steps done; switching-thread failed with Git handoff completed, but the destination thread could not be created.
• Task retry result: executor_blocked; no project-layer command executed.

Recovery and undo

• Do not delete or prune /Users/richh/.codex/worktrees/5a0b/Tyrell; it is the recovery copy for the transferred delta.
• Once the Codex code-mode executor is healthy, either bind the existing task to this worktree or checkpoint the delta to a reviewed branch before any integration.
• Do not reapply the delta to canonical main until the Tyrell owner compares it with the named iOS/CloudKit worktrees and confirms one-writer ownership.
• No remote branch was pushed, no release was built, and no deployment occurred.

Outstanding owner actions

• Restore/reconnect the Codex code-mode executor for the pinned Tyrell task.
• Resume verification from /Users/richh/.codex/worktrees/5a0b/Tyrell plus the established named implementation worktrees.
• Publish this changelog to Apple Notes in the rdmsm4x folder from an Aqua Terminal session. The initiating session is remote/background and cannot truthfully claim the Notes write.