Designs agent tools and builds MCP servers (tool schemas, naming, error shapes, auth, context-efficient results) when exposing capabilities to an LLM agent or scaffolding a Model Context Protocol server.
EnglishWrites and fixes correct async/concurrent code across Python (asyncio), TypeScript (Promises), Rust (tokio), and Go (goroutines/channels), targeting deadlocks, races, cancellation, and backpressure.
EnglishAudits and fixes markup/JSX for WCAG 2.2 AA compliance — alt text, ARIA, heading order, contrast, keyboard nav, focus management; used before shipping UI or preparing an a11y review.
EnglishAudits open-source license compliance — resolves SPDX identifiers across the full transitive dependency tree (license-checker/scancode), classifies copyleft (GPL/AGPL/LGPL) exposure against the distribution model, enforces an allow/deny CI policy, and generates NOTICE/THIRD-PARTY attribution files.
EnglishAudits and fixes technical/on-page SEO — meta tags, Open Graph/Twitter cards, JSON-LD structured data, canonicals, sitemap, robots.txt; used when improving discoverability or fixing crawlability.
EnglishImplements authentication and session management (JWT issuing/verification, refresh rotation, sessions, cookies, OAuth2/OIDC flows, RBAC checks) when building or fixing how a backend logs users in and authorizes requests.
EnglishWrites, fixture-tests, and runs codebase-wide automated transforms (codemods) that parse source to an AST and rewrite nodes via grammar-aware tools (jscodeshift/ts-morph, ast-grep, Comby, libcst/Bowler, OpenRewrite), dry-running before applying one mechanical change across many files. Use when a structural edit must hit many call sites reliably and find-replace would mangle strings, comments, or shadowed names.
EnglishRun a structured design conversation that explores requirements, proposes 2-3 approaches with tradeoffs, and converges on a validated design BEFORE any code is written — used when a feature/idea is fuzzy or under-specified.
EnglishBuilds tamper-evident audit logging — structured actor/action/target/result records for security-relevant events, append-only hash-chained or WORM/object-lock storage, PII-safe payloads that log references not raw data, and regulation-driven retention — to satisfy SOC2/HIPAA-style controls and support incident forensics.
EnglishDesigns change-data-capture and streaming pipelines — log-based CDC off a DB transaction log (Debezium/WAL/binlog), topic-per-table fan-out onto Kafka/Kinesis, consumer-group/offset/rebalance correctness, windowed/stateful stream processing with watermarks, exactly-once vs at-least-once-plus-idempotent delivery, and Avro/Protobuf schema-registry evolution.
EnglishDesigns the UX and contract of a command-line program in any language — argument parsing via a real lib (commander/yargs, click/typer, cobra, clap), meaningful exit codes, the stdout=data / stderr=logs split so the tool pipes cleanly, TTY-aware color/spinners that auto-plain when redirected, a --json machine mode, layered config precedence, signal cleanup, and shell completion. Covers the whole interface contract that makes a CLI scriptable, composable, and safe — not the language-internal logic.
EnglishBuilds production data grids that stay fast and accessible at 10k–1M+ rows — decide server-side vs client-side sort/filter/paginate by the dataset-fits-in-memory test (client only under ~10k rows, otherwise push to the API and treat the table as a controlled view of server state), ROW-VIRTUALIZE with TanStack Virtual or react-window so only the visible window mounts (fixed estimateSize, overscan 5–10, measureElement for dynamic rows, contain:strict, and a real scroll container — never table-layout:auto over thousands of rows), build the headless logic with TanStack Table v8 (or AG Grid when you need pinning/grouping/enterprise out of the box), add column resize/reorder/pin, inline edit with optimistic update + rollback on error, row selection with a stable rowId, full keyboard nav with roving tabindex over an ARIA grid (role=grid/row/gridcell, aria-sort, aria-rowcount/aria-rowindex so virtualization stays announced), position:sticky headers, streaming CSV export that doesn't block the main thread, and explicit empty/loading-skeleton/error/no-results states.
EnglishDesigns and implements ETL/ELT pipelines — extract from sources, transform/normalize, load to a warehouse — with idempotency, incremental loads, scheduling, and orchestration patterns.
EnglishImplements type-safe forms with React Hook Form + Zod (or server-action validation) — schemas, field arrays, multi-step flows, and accessible error handling; used when building or fixing forms.
EnglishBuilds native mobile UI in SwiftUI (iOS) and Jetpack Compose (Android) — declarative layout (List/LazyVStack vs Scaffold/LazyColumn), unidirectional state with hoisting (@Observable vs ViewModel/StateFlow), typed navigation stacks with deep links, adaptive sizing (size classes/WindowSizeClass), light/dark theming via semantic tokens, lifecycle-correct side effects, recomposition control, and VoiceOver/TalkBack accessibility.
EnglishGenerates and edits Office documents (DOCX/PPTX) programmatically from data or templates, including styled reports, tables, headers/footers, tracked changes, and slide decks.
EnglishDesigns offline-first client data layers — a local store (SQLite/Room/Core Data/WatermelonDB), a durable outbound mutation queue with idempotency keys, optimistic local writes, cursor-based delta pull, conflict resolution (last-writer-wins/vector clocks/CRDT), tombstone deletes, and reconnect reconciliation.
EnglishScaffolds production-grade React/Next.js components with proper props typing, server vs client component boundaries, and composition; used when building or restructuring UI components.
EnglishBuilds realtime push channels over WebSocket/SSE — auth-on-connect, heartbeat/zombie eviction, topic subscribe/publish with per-topic authz and presence, sequence-numbered resume for missed-message recovery, client reconnect with backoff+jitter, and a Redis/NATS pub/sub backplane with send-buffer limits for horizontal scale.
EnglishBuilds semantic/vector search — pick an embedding model + dimensionality (and whether to truncate Matryoshka dims) and the matching distance metric (cosine/dot/L2, normalize to unit length so cosine == dot and IP is correct), an ANN index with the recall/latency/memory tradeoff understood (HNSW M/efConstruction/efSearch for low-latency RAM-resident; IVF-PQ nlist/nprobe/PQ for billion-scale compressed; flat/exact for <100k) in pgvector/Qdrant/Milvus/FAISS/Pinecone, chunking + overlap + per-chunk metadata for filtering, HYBRID retrieval fusing BM25 + dense by Reciprocal Rank Fusion (RRF, k≈60) not score addition, a cross-encoder/Cohere reranker over the top-50→k, correct pre-filter-vs-ANN interaction (filterable HNSW, not post-filter that starves k), and offline eval with recall@k / nDCG@10 / MRR against a labeled qrels set. Quantize (scalar/PQ) only after measuring recall loss; tune efSearch/nprobe to a recall target, not a guess.
EnglishDesigns and hardens CI/CD pipelines across GitHub Actions, GitLab CI, Jenkins, and CircleCI — caching, matrix builds, least-privilege tokens, pinned actions, and OIDC instead of long-lived secrets. Triggers when writing or fixing a pipeline/workflow file, speeding up CI, or securing a build.
EnglishPerforms FinOps cost optimization on AWS/GCP/Azure — right-sizing instances, spotting idle/orphaned resources, Savings Plans/Reserved/committed-use analysis, storage tiering, and cost anomaly investigation. Triggers when a cloud bill spikes, doing a cost review, or right-sizing infrastructure.
EnglishWires a local multi-service development stack with Docker Compose — app plus backing datastores (Postgres/Redis/Kafka), dependency-ordered healthchecks (dependson condition: servicehealthy), pinned images and named volumes, seed/init scripts, hot-reload bind mounts, profiles, and one-command up/down/reset via a Makefile.
EnglishConfigures and optimizes the JS/TS build toolchain — tsconfig plus a bundler (Vite/esbuild/Rollup/tsup/webpack) — for correct module output (ESM/CJS/dual + types), code splitting, tree-shaking, sourcemaps, env injection, and fast incremental builds.
EnglishIncludes Agent Tool MCP Builder, Async Concurrency Correctness, Audit Accessibility WCAG, and other workflows.
Supported by the Atlas install prompt. Skill-specific requirements vary.
Pack stats
What’s included
Agent Tool MCP Builder
Designs agent tools and builds MCP servers (tool schemas, naming, error shapes, auth, context-efficient results) when exposing capabilities to an LLM agent or scaffolding a Model Context Protocol server.
Async Concurrency Correctness
Writes and fixes correct async/concurrent code across Python (asyncio), TypeScript (Promises), Rust (tokio), and Go (goroutines/channels), targeting deadlocks, races, cancellation, and backpressure.
Audit Accessibility WCAG
Audits and fixes markup/JSX for WCAG 2.2 AA compliance — alt text, ARIA, heading order, contrast, keyboard nav, focus management; used before shipping UI or preparing an a11y review.
Audit License Compliance
Audits open-source license compliance — resolves SPDX identifiers across the full transitive dependency tree (license-checker/scancode), classifies copyleft (GPL/AGPL/LGPL) exposure against the distribution model, enforces an allow/deny CI policy, and generates NOTICE/THIRD-PARTY attribution files.
Audit Technical SEO
Audits and fixes technical/on-page SEO — meta tags, Open Graph/Twitter cards, JSON-LD structured data, canonicals, sitemap, robots.txt; used when improving discoverability or fixing crawlability.
Auth JWT Session
Implements authentication and session management (JWT issuing/verification, refresh rotation, sessions, cookies, OAuth2/OIDC flows, RBAC checks) when building or fixing how a backend logs users in and authorizes requests.
Author Codemod
Writes, fixture-tests, and runs codebase-wide automated transforms (codemods) that parse source to an AST and rewrite nodes via grammar-aware tools (jscodeshift/ts-morph, ast-grep, Comby, libcst/Bowler, OpenRewrite), dry-running before applying one mechanical change across many files. Use when a structural edit must hit many call sites reliably and find-replace would mangle strings, comments, or shadowed names.
Brainstorm Design
Run a structured design conversation that explores requirements, proposes 2-3 approaches with tradeoffs, and converges on a validated design BEFORE any code is written — used when a feature/idea is fuzzy or under-specified.
Build Audit Logging
Builds tamper-evident audit logging — structured actor/action/target/result records for security-relevant events, append-only hash-chained or WORM/object-lock storage, PII-safe payloads that log references not raw data, and regulation-driven retention — to satisfy SOC2/HIPAA-style controls and support incident forensics.
Build Cdc Streaming Pipeline
Designs change-data-capture and streaming pipelines — log-based CDC off a DB transaction log (Debezium/WAL/binlog), topic-per-table fan-out onto Kafka/Kinesis, consumer-group/offset/rebalance correctness, windowed/stateful stream processing with watermarks, exactly-once vs at-least-once-plus-idempotent delivery, and Avro/Protobuf schema-registry evolution.
Build CLI Tool
Designs the UX and contract of a command-line program in any language — argument parsing via a real lib (commander/yargs, click/typer, cobra, clap), meaningful exit codes, the stdout=data / stderr=logs split so the tool pipes cleanly, TTY-aware color/spinners that auto-plain when redirected, a --json machine mode, layered config precedence, signal cleanup, and shell completion. Covers the whole interface contract that makes a CLI scriptable, composable, and safe — not the language-internal logic.
Build Data Table
Builds production data grids that stay fast and accessible at 10k–1M+ rows — decide server-side vs client-side sort/filter/paginate by the dataset-fits-in-memory test (client only under ~10k rows, otherwise push to the API and treat the table as a controlled view of server state), ROW-VIRTUALIZE with TanStack Virtual or react-window so only the visible window mounts (fixed estimateSize, overscan 5–10, measureElement for dynamic rows, contain:strict, and a real scroll container — never table-layout:auto over thousands of rows), build the headless logic with TanStack Table v8 (or AG Grid when you need pinning/grouping/enterprise out of the box), add column resize/reorder/pin, inline edit with optimistic update + rollback on error, row selection with a stable rowId, full keyboard nav with roving tabindex over an ARIA grid (role=grid/row/gridcell, aria-sort, aria-rowcount/aria-rowindex so virtualization stays announced), position:sticky headers, streaming CSV export that doesn't block the main thread, and explicit empty/loading-skeleton/error/no-results states.
Build Etl Pipeline
Designs and implements ETL/ELT pipelines — extract from sources, transform/normalize, load to a warehouse — with idempotency, incremental loads, scheduling, and orchestration patterns.
Build Form Validation
Implements type-safe forms with React Hook Form + Zod (or server-action validation) — schemas, field arrays, multi-step flows, and accessible error handling; used when building or fixing forms.
Build Native Mobile UI
Builds native mobile UI in SwiftUI (iOS) and Jetpack Compose (Android) — declarative layout (List/LazyVStack vs Scaffold/LazyColumn), unidirectional state with hoisting (@Observable vs ViewModel/StateFlow), typed navigation stacks with deep links, adaptive sizing (size classes/WindowSizeClass), light/dark theming via semantic tokens, lifecycle-correct side effects, recomposition control, and VoiceOver/TalkBack accessibility.
Build Office Docs
Generates and edits Office documents (DOCX/PPTX) programmatically from data or templates, including styled reports, tables, headers/footers, tracked changes, and slide decks.
Build Offline First Sync
Designs offline-first client data layers — a local store (SQLite/Room/Core Data/WatermelonDB), a durable outbound mutation queue with idempotency keys, optimistic local writes, cursor-based delta pull, conflict resolution (last-writer-wins/vector clocks/CRDT), tombstone deletes, and reconnect reconciliation.
Build React Component
Scaffolds production-grade React/Next.js components with proper props typing, server vs client component boundaries, and composition; used when building or restructuring UI components.
Build Realtime Channel
Builds realtime push channels over WebSocket/SSE — auth-on-connect, heartbeat/zombie eviction, topic subscribe/publish with per-topic authz and presence, sequence-numbered resume for missed-message recovery, client reconnect with backoff+jitter, and a Redis/NATS pub/sub backplane with send-buffer limits for horizontal scale.
Build Vector Search
Builds semantic/vector search — pick an embedding model + dimensionality (and whether to truncate Matryoshka dims) and the matching distance metric (cosine/dot/L2, normalize to unit length so cosine == dot and IP is correct), an ANN index with the recall/latency/memory tradeoff understood (HNSW M/efConstruction/efSearch for low-latency RAM-resident; IVF-PQ nlist/nprobe/PQ for billion-scale compressed; flat/exact for <100k) in pgvector/Qdrant/Milvus/FAISS/Pinecone, chunking + overlap + per-chunk metadata for filtering, HYBRID retrieval fusing BM25 + dense by Reciprocal Rank Fusion (RRF, k≈60) not score addition, a cross-encoder/Cohere reranker over the top-50→k, correct pre-filter-vs-ANN interaction (filterable HNSW, not post-filter that starves k), and offline eval with recall@k / nDCG@10 / MRR against a labeled qrels set. Quantize (scalar/PQ) only after measuring recall loss; tune efSearch/nprobe to a recall target, not a guess.
CI/CD Pipeline Author
Designs and hardens CI/CD pipelines across GitHub Actions, GitLab CI, Jenkins, and CircleCI — caching, matrix builds, least-privilege tokens, pinned actions, and OIDC instead of long-lived secrets. Triggers when writing or fixing a pipeline/workflow file, speeding up CI, or securing a build.
Cloud Cost Optimize
Performs FinOps cost optimization on AWS/GCP/Azure — right-sizing instances, spotting idle/orphaned resources, Savings Plans/Reserved/committed-use analysis, storage tiering, and cost anomaly investigation. Triggers when a cloud bill spikes, doing a cost review, or right-sizing infrastructure.
Compose Local Dev Stack
Wires a local multi-service development stack with Docker Compose — app plus backing datastores (Postgres/Redis/Kafka), dependency-ordered healthchecks (dependson condition: servicehealthy), pinned images and named volumes, seed/init scripts, hot-reload bind mounts, profiles, and one-command up/down/reset via a Makefile.
Configure Bundler Build
Configures and optimizes the JS/TS build toolchain — tsconfig plus a bundler (Vite/esbuild/Rollup/tsup/webpack) — for correct module output (ESM/CJS/dual + types), code splitting, tree-shaking, sourcemaps, env injection, and fast incremental builds.
Showing 24 of 119 skills. Use the list’s page controls above to explore the rest.
Quick start
- Choose your skills. Select individual skills above, or choose the entire pack.
- Copy the install prompt. Use Copy install prompt above the list.
- Send it to your agent. Paste into your coding agent’s chat. Your agent reviews the source and guides the setup.
Try it with your agent
After installation, start with a request like:
Use the Agent Tool MCP Builder skill to help with my task.
Ask me for the context you need before getting started.Requirements & license
- A coding agent that can access your project files and install skills.
- Your agent checks each skill’s instructions, dependencies, and permissions during setup.
- Reported license for the skills shown: Apache-2.0. The author’s terms apply.