Run 9's planner wrote a dead end as "tried X -> failed because Y". The content
was exactly what the protocol asks for. The parser split on "→" only, refused
the handoff, and a refused handoff fails the release rather than the turn, so
the lease expired with the work intact and unrecorded.
Accept either arrow. A separator is not the thing being validated.
The prefix stripping was also wrong on the right-hand side: it trimmed
"failed because " from an untrimmed string that started with a space, so every
parsed dead end kept the literal prefix in why_failed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CVbaKucEYBjMqVeUgJUsc1
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