Mark Stuart mstuart

Mark Stuart

🤖 AI tooling · ⚙️ Node.js libraries · 🔷 GraphQL

🔌 graphql-agent-toolkit — Turn any GraphQL API into AI-agent-ready tools — MCP servers, LangChain tools, and SDKs.
🤝 graphql-contract — Consumer-driven contract testing for GraphQL — no Pact Broker required.
💰 graphql-cost-guardian — Score and cap GraphQL query cost with configurable per-field weights.
#️⃣ graphql-hash — Deterministic query hashing for caching and persisted queries.
🗃️ graphql-operation-store — Framework-agnostic persisted-query and trusted-document store.
🧬 graphql-pluck-types — Pull TypeScript interfaces straight out of a GraphQL SDL string.
📐 graphql-schema-policies — Enforce semantic schema-design policies in CI.
🛡️ graphql-sentinel — Security scanner and runtime shield for GraphQL APIs.
🐕 graphql-watchdog — Performance toolkit — N+1 detection, normalized caching, cost analysis, CI regression.
🎓 graphql-workshop — Hands-on GraphQL training workshop (2018).
🎤 xoom-graphql-workshop — Hands-on GraphQL training workshop (2019).

📟 ai-statusline — Real-time model, token, cost, and git status line for AI coding assistants.
🧠 code-memory — Persistent memory for AI coding — semantic search, git history, context that survives.
✂️ mcp-prune — Audit MCP server usage from Claude Code transcripts and prune the idle ones.
⏪ mcp-replay — Record and replay MCP interactions for deterministic CI — nock/msw for MCP.
🔍 mcp-tool-lint — Static linter that catches MCP tool-definition defects before they ship.
🍼 pr-babysitter — Auto-fixes merge conflicts, failing CI, and review comments with Claude Code.

🛟 fetch-resilience — Retry, timeout, circuit breaker, and bulkhead policies for native fetch — edge-safe, zero deps.
🚨 openapi-sentinel — Catch OpenAPI 3.1 spec drift live with runtime request/response validation.
📋 problem-response — RFC 9457 Problem Details error responses — framework-agnostic and TypeScript-first.
🔖 versionkit — API versioning with RFC-compliant Sunset and Deprecation headers.
⏱️ api-perf-budget — Define and enforce per-route latency budgets in CI.

🏁 abort-race — Race async operations and auto-cancel the losers' AbortSignals.
⏲️ abort-timer — An AbortSignal that fires after a timeout — with reset and clear.
🔗 signal-compose — Combine AbortSignals with AND, OR, and timeout semantics.
🧵 context-local — Typed, ergonomic context for async flows over AsyncLocalStorage.
🧹 disposable-from — Wrap timers, listeners, and intervals as Disposables with clean teardown.
❓ has-disposable — Check whether a value implements Disposable or AsyncDisposable.
🧴 using-safe — Use and dispose resources safely, even without the using declaration.
👷 offload-fn — Run a function in a Worker thread and await the result as a promise.
🔎 is-runtime — Detect which JavaScript runtime you're executing in.
🔐 has-permission — Check and assert Node.js Permission Model grants at runtime.

📦 dep-perf-analyzer — Measure the runtime performance cost of your npm dependencies.
📊 mem-pressure — Watch Node.js memory and emit events when thresholds are crossed.
🩺 memcheck-node — Automated memory-leak regression testing for Node.js.
📈 perf-fn — Time sync and async functions with the Performance API.
🗑️ weakref-store — A WeakRef cache that evicts entries as values get garbage-collected.
🧰 portacache — Portable key-value cache that auto-picks the best available backend.

🔁 iterable-ops — Lazy map, filter, take, chunk, zip, and flatten for sync and async iterables.
🗺️ map-extras — Missing Map helpers — mapValues, filterEntries, merge, invert, groupBy.
➗ set-extras — Set algebra — union, intersection, difference, subset, superset.
🛂 schema-guard — Build runtime type guards from a plain object schema.
🔀 deep-diff-patch — Compute a minimal JSON diff between objects and apply it as a patch.
📤 error-serialize — Serialize and rebuild Error objects with their cause chains intact.
🏷️ error-with-cause — Typed error classes with codes, cause chains, and type guards.
🌊 stream-to-value — Drain a Web ReadableStream into a string, bytes, JSON, or array.
🚿 web-stream-transform — Functional map, filter, take, batch, and tap for Web Streams.