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
- currency-cents Public
Money as integer cents: parsing, formatting, arithmetic, and fair allocation without rounding loss
- csv-parser Public
RFC 4180 CSV parser and stringifier with a chunked streaming API, quoted-field/escaped-quote/embedded-newline handling, and opt-in type coercion. Zero runtime dependencies.
- csp-builder Public
Typed Content-Security-Policy builder with directives, nonce/hash helpers, and header generation
- cron-expression-parser Public
Zero-dependency 5-field cron parser: validate, nextRun/nextN (UTC bounded search), describe() human sentences
- cors-config-builder Public
CORS policy engine with origin matching, preflight handling, and footgun prevention
- cookie-parse-lite Public
HTTP cookie parsing and serialization with attribute validation and Set-Cookie parsing
- conventional-changelog-lite Public
Parse Conventional Commits from raw git log text into a rendered changelog + semver bump suggestion. Zero deps.
- conflict-resolver Public
Field-level 3-way merge for offline-first sync: auto-merges non-conflicting field changes, resolves true conflicts via lastWrite/preferLocal/preferRemote/custom strategies, and reports every conflict and how it was resolved. Zero runtime dependencies.
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