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Skill Claude CodeCodex
Use this skill when designing GraphQL schemas, resolvers, or data loading strategies. This skill enforces: schema-first design, N+1 prevention via DataLoader, directive-based auth, cursor-based pagination, and structured error handling. Applies to any backend stack with GraphQL. Do NOT use for: REST API design, gRPC…
Skill Claude CodeCodex
Use this skill when the user says 'gRPC', 'protobuf', 'protocol buffers', 'streaming RPC', 'unary call', 'server streaming', 'client streaming', 'bidirectional streaming', 'gRPC interceptor', 'gRPC error handling', 'protobuf schema', 'service definition', 'RPC design', or when designing gRPC APIs. This skill enforces…
Skill Claude CodeCodex
Use this skill when the user says 'idempotency', 'idempotent', 'idempotency key', 'exactly-once', 'retry safety', 'deduplication', 'duplicate detection', 'idempotent endpoint', 'safe retry'. This skill implements idempotency keys and exactly-once semantics so retries never result in duplicate side effects. Applies to…
Skill Claude CodeCodex
Use this skill when implementing multi-language support, translation workflows, or locale-aware formatting. This skill enforces: BCP 47 locale tags, ICU MessageFormat for complex messages, dot-separated namespaced keys, fallback chains, and CI-validated translation files. Applies to any backend stack serving…
Skill Claude CodeCodex
Use this skill when the user says 'load test', 'stress test', 'soak test', 'spike test', 'k6', 'Locust', 'Artillery', 'performance test', 'benchmark', 'throughput', 'RPS', 'latency p99', 'CI performance', 'regression test', 'load test results', or when planning performance verification. This skill enforces consistent…
Skill Claude CodeCodex
Use this skill when the user says 'message queue', 'Kafka', 'RabbitMQ', 'SQS', 'pub-sub', 'event bus', 'consumer group', 'topic', 'queue', 'at-least-once', 'exactly-once', 'idempotent consumer', 'event sourcing', 'dead letter queue', 'DLQ', 'message broker', 'producer', 'consumer', 'event-driven', 'async processing'…
Skill Claude CodeCodex
Use this skill when the user says 'multi-tenancy', 'SaaS', 'tenant isolation', 'row-level security', 'DB per tenant', 'schema per tenant', 'tenant provisioning', 'tenant migration', 'multi-tenant database', 'tenant context'. This skill implements tenant isolation strategies: row-level, schema-per-tenant, and…
Skill Claude CodeCodex needs its repo
Use this skill when the user says 'OpenAPI', 'Swagger', 'API documentation', 'spec-first', 'API spec', 'openapi.yaml', 'swagger.json', 'codegen', 'openapi-generator', 'API contract first'. This skill enforces spec-first API documentation with OpenAPI 3.x, code generation, and versioned specs. Applies to any backend…
Skill Claude CodeCodex
Use this skill when the user says 'plugin system', 'plugin architecture', 'extension point', 'SPI', 'service provider interface', 'hot-plug', 'modular design', 'plugin loader', 'extensible', 'plugin API', 'custom extension', 'plug-in', 'dynamic loading'. This skill designs plugin/extension architecture with SPI…
Skill Claude CodeCodex
Comprehensive skill definitions for rate-limiting. Includes multiple references and diagrams.
Skill Claude CodeCodex
Use this skill when the user says 'resilience', 'circuit breaker', 'retry', 'bulkhead', 'timeout', 'fallback', 'resilience4j', 'fault tolerance', 'rate limiter', 'backoff', 'retry strategy', 'bulkhead pattern'. This skill applies production fault-tolerance patterns: circuit breaker, retry with backoff, bulkhead…
Skill Claude CodeCodex
Use this skill when the user says 'cron', 'schedule', 'scheduled task', 'cron job', 'job scheduling', 'distributed cron', 'cron expression', 'timezone', 'scheduler', 'background job', 'periodic task', 'interval', 'cron trigger'. This skill implements distributed cron and job scheduling with timezone-aware triggers and…
Skill Claude CodeCodex
Use this skill when designing search functionality, indexing strategies, or relevance tuning. This skill enforces: derived index from source of truth, index aliases for zero-downtime reindex, proper field mapping with analyzers, and resource limits. Applies to Elasticsearch, Meilisearch, Algolia, or any search engine.…
Skill Claude CodeCodex
Advanced serverless deployment and cold-start optimization skill.
Skill Claude CodeCodex
Use this skill when implementing logging frameworks, log formats, or distributed tracing correlation. This skill enforces: JSON lines format, strict log schema with correlation IDs, PII redaction, log level discipline, and stdout-only output. Applies to any backend stack with Winston/Pino/Serilog/Log4j/logrus/zerolog.…
Skill Claude CodeCodex
Use this skill when working with Supabase platform — PostgreSQL schema, Row Level Security, Realtime subscriptions, Auth, Storage, Edge Functions, pgvector. This skill enforces: RLS policies on every table, proper PostgreSQL schema design, real-time channel organization, storage bucket policies, edge function cold…
Skill Claude CodeCodex
Use this skill when the user says 'outbox', 'transactional outbox', 'outbox pattern', 'reliable event publishing', 'dual write', 'CDC outbox', 'message relay', 'publish events reliably', 'exactly-once publish', 'debezium outbox'. This skill enforces: event publication in the same DB transaction as business data…
Skill Claude CodeCodex
Use this skill when the user says 'webhook', 'webhook receiver', 'webhook delivery', 'signature verification', 'HMAC', 'event delivery', 'outgoing webhook', 'incoming webhook', 'retry webhook', 'webhook endpoint'. This skill implements receiving, verifying, retrying, and delivering webhooks securely. Applies to any…
Skill Claude CodeCodex
Use this skill when the user says 'WebSocket', 'real-time', 'socket.io', 'WS connection', 'reconnection', 'WS rooms', 'broadcast', 'WS scaling', 'WS clustering', 'pub/sub over WS', 'SSE', 'Server-Sent Events', 'long polling', 'WS handshake', or when designing real-time communication. This skill enforces consistent…
Skill Claude CodeCodex
Use when the user asks about WebRTC, real-time video/audio, media streaming, SFU/MCU, signaling server, TURN/STUN, live streaming, WebSocket for media, or real-time communication infrastructure. Do NOT use for: basic WebSocket patterns (websocket-patterns), or general real-time updates (data-streaming).
Skill Claude CodeCodex
Use this skill when asked about smart contract development, Solidity, Vyper, Rust smart contracts (Solana, NEAR, Polkadot), Haskell/Plutus (Cardano), Cairo/StarkNet, dApp backend development, Truffle, Hardhat, Foundry, Anchor, and blockchain application patterns. Languages: Solidity, Vyper, Rust, Haskell, Cairo, Move.…
Skill Claude CodeCodex
Use this skill when asked about Bitcoin internals, Bitcoin Core, Bitcoin Script, Taproot, mining, Proof of Work, Lightning Network, BIP standards, Ordinals, BRC-20, Runes, Bitcoin L2s (Stacks, RSK, Babylon), and Bitcoin protocol development. Languages: C++, Rust, Python, Clarity. Covers Bitcoin Core C++ implementation…
Skill Claude CodeCodex
Use this skill when asked about blockchain fundamentals, consensus mechanisms, PoW, PoS, gas, staking, blockchain data structures, DAG consensus, Avalanche, MEV, PBS, economic security, blockchain node implementation. Languages: C++, Go. Covers core protocol engineering including consensus algorithms (Nakamoto, PBFT…
Skill Claude CodeCodex
Cross-chain protocols, IBC, LayerZero, Wormhole, Axelar, CCIP, bridges, atomic composability, shared sequencer, cross-chain message passing. Covers trust models (light clients, external validators, ZK proofs), bridge security, token representation (canonical, wrapped, native), relayer economics, and cross-chain…
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: