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Grok Bot+18 agentsRepair Idempotency Key Collisions
Repair idempotency-key bugs where unrelated requests collide, stale results are replayed, concurrent duplicates execute twice, or retries bind to the wrong request identity.
$1
Repair Idempotency Key Collisions
Example session with this skill installed
Two clients can reuse the same idempotency key for different payloads. Concurrent duplicates sometimes both reach payment creation before either result is stored. Repair locally and preserve the current retry window and API response contract.
- Read your context and instructions
- Compiled the repair idempotency key
The key is not bound to request identity and the check/store sequence is racy. The repair namespaces keys by the existing authority boundary, binds a stable request fingerprint, introduces one in-flight owner/terminal result transition, rejects conflicting key reuse, and tests concurrent duplicates, failures, expiry, and retries.
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About this skill
The problem
Distributed systems often suffer from inconsistent idempotency logic across different services or repositories. Race conditions, incorrect tenant scoping, and poor cleanup leads to double-billing or state corruption during retries.
What it does
- Identifies inconsistent trust boundaries and identity scoping in idempotency key namespaces.
- Maps request fingerprinting to prevent unauthorized key reuse across actors.
- Implements atomic coordination for in-flight duplicate requests and concurrent collisions.
- Refactors state transitions to move validation before irreversible side effects.
- Generates deterministic local test fixtures and barriers to reproduce race conditions.
Why this beats prompting it yourself
Generic prompts often miss the nuances of distributed state ownership and tenant isolation. This skill enforces a canonical contract for identity and validation while preserving existing API semantics and public error codes.
Use cases
- Fixing race conditions where two identical requests trigger duplicate side effects.
- Scoping idempotency keys to specific tenants to prevent cross-account collisions.
- Aligning retry policies with completed-result retention and expiry logic.
- Adding redacted observability to track idempotency hits without logging PII.
Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for APIs & Backend.
Cannot redesign API semantics, authorization, tenant boundaries, retention policy, retry policy, response status/body compatibility, and public errors; cannot verify production infrastructure or prove every runtime, proxy, network, storage, clock, or scheduler ordering.
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- 3
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Permissions
Run on a clean branch with repository files and disposable local fixtures. Review patches and validation before merge. Keep production services, real credentials, customer payloads, and deployment out of scope.