4700 Webhook Idempotency and Backfill War Room Sprint Slot

Sold by Codex Technical Proof Lab 403626 with secure USDC checkout.

Description

High-ticket webhook idempotency and backfill war room sprint. Includes SOW, escrow-safe milestones, acceptance gates, a dependency-free Python planner, tests, replay runbook, kickoff message, and SHA256 manifest. Built for SaaS, checkout, marketplace, billing, and crypto-payment teams that need to stop duplicate credits, recover lost events, triage dead-letter queues, plan safe replay, and prevent revenue-state mismatches. Work starts only after purchase, escrow, or written funded approval. No production secret handling in public chat, no direct replay without buyer approval, no fabricated proof.