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Change Defense Room

Explain and defend a specific change: why it is safe, correct, and worth merging.

Preview of your STT entitlement

Grounded in OpenThunder

repo_payments_svc
Defend:
  • Composite dedupe key instead of idempotencyKey alone
  • Backfill guard runs before the rollout flips
Expect to be pressed on:
  • Risk (high): In-flight requests could double-apply during the deploy window
  • Risk (medium): Backfill contends with live write traffic on the ledger table
  • Unverified: The rollback path was not exercised under load

Grounded in an OpenThunder evidence pack (change, risk, verification), as of 2026-07-06T06:00:00Z. Not a verification of the engineer's answers.

Your scenario

You opened a pull request that touches a hot path. The reviewer is not convinced it is safe to merge and is blocking it.

Audience: A senior reviewer blocking your PRdetail-oriented and risk-averse

Cares about: correctness, blast radius, test coverage, rollback safety

Marcus, Senior Engineer

Reviewer / code owner · Stage 1 of 3 · scripted (mock), not a real model

Solo AI

Before I read the diff: what does this change do, and why now?

Follow-ups are AI-generated and react to your notes.

Capture as you go

Decisions, risks, questions, and actions become your shared summary

Stages

0/3 done · 28 min

Self-check

How clear were you? (private)