High-performance Distributed System Patterns (Consistent Hashing, Token Bucket, LSM Tree) with zero dependencies.

A simple and efficient Token Bucket rate limiter in TypeScript

Gracenote TV listings to XMLTV for tvheadend EPG

Convert KML placemarks to geojson

Token Bucket rate limiter middleware using NodeCache

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Writ MCP server — give an MCP-capable runtime (Claude Code, etc.) a verifiable agent passport. Tools to check status and present signed X-Passport assertions for real economic actions.

Model-facing background job control tools (job_output, job_list, job_kill) over the ctx.jobs registry

Writ agent SDK — Ed25519 keypair management, mandate-scoped assertion signing, and the X-Passport header for verified agent actions. Give your agents authority they can prove.

Writ platform middleware — requireKYA() for Hono / Express / Next, plus a Verify API client. ~10 lines to gate an endpoint on a verified agent passport. Fails closed.

Writ end-to-end demo CLI — run the full KYA acceptance flow (onboard, mandate, ALLOW/DENY caps, revocation, anonymous block) against the live sandbox with one command: npx @writhq/demo.

verglas-pay — give any LLM agent a spending envelope it cannot exceed