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Felis/docs
Lemon-miaow 62e8c87d0e docs(diagrams): align §28 claim/link sequences with the audited implementations
The claim-transaction note still described the pre-audit-#4 shape (SELECT
EXISTS plus a quota pre-check outside the transaction); the implemented
ClaimServer serializes on pg_advisory_xact_lock(user_id), takes the row
FOR UPDATE and re-runs the four-dimension gate inside the same
transaction — the diagram's QuotaAvailable step is only a fast path.
The link flow now selects the code FOR UPDATE, treats a same-user
re-verify as idempotent, and lets a live caller take over a retired
(soft-deleted) owner's link — the 409 is only for a different, live user.
Both re-read from internal/api/pgrepo.go and the handler mappings.
2026-09-24 01:26:32 +08:00
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