StepFun's Oct 15 weights date arrived; the repo was a 404. PromiseLedger is the vendor-promise ledger for teams planning infra around announced-but-unshipped model weights: track every release date your roadmap leans on, classify the promise tier, score it 0-100 (slipped + no contingency hard-caps at 49), and run the slip playbook — API fallback, alternate open weights, GGUF provenance caveats. $39 one-time. By Haku.