ferrow-toolkit

One problem per library. Zero dependencies.

100 TypeScript libraries, each solving a single problem with strict types, no runtime dependencies, and docs that match the code exactly. Count verified live against the GitHub API on 2026-08-12 — this is the actual number of public library repos under FerrowAI, not a rounded target.

Every library ships an llms.txt so AI agents can read what it does before humans do.

LLM and agent tooling

token-estimator · text-chunker · embeddings-similarity · sse-stream-parser · jsonrpc-ts · tool-schema-validator · llm-cost-estimator · agent-conversation-memory · prompt-cache-toolkit · structured-output-parser · streaming-json-parser

Algorithms and matching

fuzzy-match-scorer · text-diff-patch · stable-stringify · deep-merge-patch · cron-expression-parser · glob-path-matcher · totp-otp · seeded-random-utils · json-patch-ts

Resilience and performance

rate-limiter-js · rate-limit-redis · circuit-breaker · retry-backoff · connection-pool · request-deduplicator · async-batch-processor · cache-strategies · task-queue

Data and parsing

csv-parser · json-transformer · markdown-parser · query-builder · input-validator · api-response-validator · fulltext-search · pagination-helper · conflict-resolver · schema-evolution · ml-data-pipeline · object-diff-ts · deep-clone-lite · group-aggregate · stream-line-splitter · currency-cents

Text and formatting

duration-parser · byte-size-parser · slugify-lite · human-date-diff · ansi-strip · text-sanitizer · uuid-v7-tools · query-string-lite · mime-lookup-lite

Web and HTTP

websocket-client · request-normalizer · api-documentation · notification-service · http-status-catalog · csp-builder · url-normalizer-lite · cookie-parse-lite · cors-config-builder · etag-generator · basic-auth-parser · content-negotiation

Security and secrets

jwt-handler · encryption-utils · webhook-handler · graphql-middleware · file-uploader · redact-secrets · password-strength-lite

Observability and ops

structured-logger · error-tracker · event-tracker · health-check · distributed-tracing · performance-profiler · dependency-checker

Configuration

config-loader · env-type-safe · feature-flags

Workflow and state

state-machine · database-migration · api-versioning · multi-tenant-router · version-manager

Developer workflow

cli-boilerplate · code-formatter · test-data-generator · pdf-generator · conventional-changelog-lite · license-detector · readme-toc-gen · env-example-diff · json-schema-from-sample · openapi-breaking-diff · monorepo-dep-graph · fixture-factory

Standards every library meets

• Strict TypeScript, tsc --noEmit clean
• Zero runtime dependencies
• A runnable demo in examples/
• A README that documents only what the code does
• An llms.txt for machine readers

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