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
- websocket-client Public
A reconnecting WebSocket wrapper with exponential backoff + jitter, heartbeat ping/pong, message queueing while disconnected, and an event emitter API. Bring your own WebSocket implementation.
- url-normalizer-lite Public
URL canonicalization and normalization with tracking param stripping and equivalence checking
- tool-schema-validator Public
Validate LLM tool/function-call definitions and model-produced arguments — JSON-Schema subset checks, LLM-pitfall linting, path-precise argument errors, coercion mode. Zero runtime dependencies.
- token-estimator Public
Heuristic LLM prompt token count estimation with no tokenizer dependency — char/word/CJK/code aware, per-model calibration, message-array overhead, budget helpers.
- text-sanitizer Public
Text hygiene for logs and LLM inputs: control chars, Unicode normalization, zero-width removal, homoglyph detection
- text-diff-patch Public
Zero-dependency Myers line diff, unified-diff hunks, fuzzy patch apply with reject reporting, word-level highlighting
- text-chunker Public
Boundary-respecting text chunking for RAG — sentence/paragraph/markdown-heading aware, configurable overlap, per-chunk metadata, zero runtime dependencies.
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