Building Ferrow. Maintainer of the ferrow-toolkit: zero-dependency TypeScript libraries, one problem per library.
- Product: https://ferrow.ai
- Toolkit: https://github.com/FerrowAI/ferrow-toolkit
FerrowAI
Building Ferrow. Maintainer of the ferrow-toolkit: zero-dependency TypeScript libraries with honest docs.
Popular repositories Loading
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prompt-cache-toolkit
prompt-cache-toolkit PublicMaximize Claude API token efficiency with prompt caching
TypeScript
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structured-output-parser
structured-output-parser PublicExtract and repair JSON from LLM text output, with a fallback option
TypeScript
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env-type-safe
env-type-safe PublicType-safe environment variable loader with schema validation, type coercion, and detailed error reporting
TypeScript
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cli-boilerplate
cli-boilerplate PublicTiny CLI micro-framework: flag parsing, subcommand routing, auto-generated help, ANSI colors, and typo suggestions. Zero runtime dependencies.
TypeScript
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api-response-validator
api-response-validator PublicStructural schema validation for API responses: nested objects, arrays, unions, enums, optional/nullable fields, and exact JSONPath mismatches. Zero runtime dependencies.
TypeScript
Repositories
Showing 10 of 102 repositories
- redact-secrets Public
Scrub secrets from text and objects: AWS keys, GitHub tokens, JWTs, PEM blocks, bearer headers, hex/base64 keys
- readme-toc-gen Public
Generate a GitHub-style TOC for markdown, fence-aware, with idempotent marker insertion and dry-run diffs. Zero deps.
- rate-limit-redis Public
Distributed sliding-window rate limiter over a pluggable minimal eval() client interface — works with any redis client, no dependency required. Ships an atomic Lua script plus an in-memory fallback for tests/dev.
- query-string-lite Public
Parse/stringify URL query strings: nested bracket notation, arrays, type coercion, prototype-pollution guard
- query-builder Public
Chainable SQL query builder for SELECT/INSERT/UPDATE/DELETE with nested AND/OR WHERE, joins, ordering, limit/offset, and safe identifier escaping. Produces { sql, params } — no DB driver dependency.
- performance-profiler Public
Instrumentation helpers for perf_hooks with hierarchical section timing and memory tracking
- pdf-generator Public
Minimal text-and-lines PDF 1.4 writer built from scratch, zero dependencies. Helvetica core font, multi-page, mm/pt units.
- password-strength-lite Public
Lightweight, dependency-free password strength estimator: entropy scoring, pattern penalties (repeats, sequences, keyboard runs, years, leetspeak), a built-in common-password list, and documented crack-time estimates. Smaller and less accurate than zxcvbn.
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