Do not expose a production path that mutates only the in-memory proposal
index. Cover decision idempotency via ProposeModification+Decide and the
existing package MarkProposalApplied tests instead.
Co-authored-by: Cursor <cursoragent@cursor.com>
Surface a same-decision retry hint and cover commit-then-MarkProposalApplied
compensation via PutChangeProposal when the proposal index was missing.
Co-authored-by: Cursor <cursoragent@cursor.com>
Surface pending_candidate_id, report id, and risk so NeedsConfirmation
candidates are discoverable before they enter the version list.
Co-authored-by: Cursor <cursoragent@cursor.com>
Stage generation without a real document must not panic or enter the ledger.
Unknown orphan IDs are denied, write paths check author/lease/lifecycle, PATCH
no longer returns a fake 200, and overlay matching survives client/server block id drift.
Co-authored-by: Cursor <cursoragent@cursor.com>