The batteries-included runtime for LLMs featuring sandboxes, agents (OpenAI-style, graph-based, parallel/teammate patterns), skills, RAG, roles, macros, and more.
Skill Claude CodeCodex
Author executable high-level plans and per-step implementation plans for phased work. Defines the plan repo layout and step-plan schema. Grants filesystem access for grounding plans in real code.
Skill Claude CodeCodex
Gatekeep a plan for self-containedness before it is finalized. A plan must be a "sealed container" - either it answers every question a context-free LLM implementer will hit, or it points at the exact code/docs where the answer lives. Produces the missing questions and a PLANGATE SEALED/LEAKY verdict. Grants read-only…
Skill Claude CodeCodex
Adversarial review of implementation plans against executability, verifiability, and completeness standards. Verdict is OKAY or REJECT with line-referenced complaints. Grants read-only filesystem access for ground-truth checks.
Skill Claude CodeCodex
Review the API surface contract of a change - REST/HTTP routes and handlers, request/response types, OpenAPI specs, plus gRPC services and GraphQL schemas/resolvers when the diff is that flavor. Checks pagination, recorded auth decisions, HTTP method semantics, error-shape consistency, boundary validation, and…
Skill Claude CodeCodex
Security analysis of a code change - hunts exploitable flaws in the diff (injection, secrets, authz gaps, unsafe deserialization, path traversal, SSRF, supply chain) by tracing untrusted data to dangerous sinks. Verdict is PASS or FAIL, gated by a security posture (prototype/standard/hardened) so POCs aren't held to…
Skill Claude CodeCodex
End-to-end protocol for executing one step of a phased implementation plan - orient, staleness check, checklist, implement, edge-case sweep, verify, review, handoff, approval. Grants shell access for build/test commands.
Skill Claude CodeCodex
File-based task tracking for plan-driven runs on any project. Defines the TASK-NNN directory schema (index.md + append-only log.md), the frontmatter lifecycle (pending/in-progress/blocked/complete), numbering, the completion protocol, and follow-up task creation. The tasks directory on disk is the durable run state …
Skill Claude CodeCodex
Review state-changing code for transactional integrity - atomicity gaps, read-modify-write races, non-idempotent handlers of at-least-once inputs, dual-writes to a DB plus an external system, side effects that escape rollback or re-fire on retry, and isolation-level assumptions. Store-agnostic (SQL transactions…
Skill Claude CodeCodex
Verify a change from the consumer's perspective - exercise the changed surface (HTTP API, RPC, CLI) black-box against a locally running instance with clean, isolated state. Run existing usage suites first for regressions, derive new tests from the spec (never the implementation), and classify every failure as bug /…
Skill Claude CodeCodex
Evidence requirements before claiming completion — diagnostics, build exit code, tests. No completion without proof. Grants shell access for running build/test commands.
Skill Claude CodeCodex
Review the background-work surface contract of a change - queue/stream consumers, scheduled jobs, and cron handlers. Checks retry/backoff policy, DLQ/poison-message routing, graceful-shutdown drain, concurrency/prefetch bounds, and visibility-timeout vs processing-time reasoning. Load when a diff touches…
Skill Claude CodeCodex
The review-miss ledger: escaped defects (bugs that survived review and were caught later) recorded as reusable detection patterns. Review orchestrators load this skill, read the ledger, and route matching entries to reviewers as first-class checks — this is the feedback loop that makes the review stack converge…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: