blog / twitter / dev.to / linkedin

I'm Chris, a software engineer at heart and co-founder of flyweight.io.

Here are some of my favorite projects I built over the years.

Projects are grouped by topic and tagged by type.

Building blocks for apps that talk to LLMs, most of them built around the AI SDK.

• AI Retry npm: Intelligent retry and fallback mechanisms for AI SDK models
• AI Tool Set npm: Manage tool activations with type-safe, chainable tool sets
• AI Test Kit npm: Mock models, content builders and stream helpers for testing AI SDK apps
• AI Resumable Stream npm: Resume and stop UI message streams
• AI Stream Utils npm: Filter and transform UI messages while streaming to the client
• AI Assert Schema npm: Assert schemas (Zod, ArkType, JSON schema) for compatibility against your AI models
• Chunkdown npm: A tree-based markdown text splitter that understands document structure to create semantically meaningful chunks for RAG applications
• Chunk Visualizer web: A web-based playground to visualize and compare chunks from different text splitting libraries

Pieces I kept rewriting across years of serverless projects, packaged up.

• AWS Signature V4 npm: Sign HTTP requests with AWS Signature Version 4 (SigV4), via aws-sigv4-fetch and aws-sigv4-sign
• Amazon S3 URL npm: A simple formatter and parser for the various Amazon S3 URL formats
• Middy Store npm: Middleware for AWS Step Functions that automatically stores and retrieves payloads exceeding the 256KB maximum input or output size
• S3 Downloader vscode: Quick commands to download and open S3 URIs directly in VSCode
• Serverless Exports Plugin plugin: Exports environment variables and stack outputs from your Serverless project to a local file
• Serverless CloudWatch Logs Insights Plugin plugin: Automatically creates CloudWatch Logs Insights queries for all Lambda functions in your Serverless project

Helpers for the rough edges of Shopify's APIs.

• Shopify Search Query Builder npm: A tool for constructing queries for Shopify's GraphQL API search syntax
• Shopify Currencies.js npm: A simple wrapper to access Shopify's currency conversion rates from Node.js

Fixes for the things that annoy me every day on x.com.

• Clipped Page chrome web: Clip any post on x.com into a self-contained, shareable URL that renders anywhere, no account or app required
• Better X chrome: Small but useful enhancements to x.com

Tooling for the loop around the code, not the code itself.

• Git Pull Run cli: Automatically runs commands like npm install when fetching changes from git, but only if certain files have been modified
• expect.toMatchSchema() npm: Check data against any standard schema (Zod, Valibot, ArkType)
• Snapshot Serializers npm: A collection of snapshot serializers for Jest and Vitest that help manage dynamic values in test snapshots

Small, focused libraries that lean on the type system.

• Millis.js npm: A tiny and dependency-free library for date time arithmetic with a chainable and immutable API
• Uniquely Typed npm: A library to create opaque types with unique symbols
• Create Typed Env npm: A library to create a type-safe proxy for accessing environment variables with optional fallback values for development and testing

Repos I start new projects from, so I don't redo the setup every time.

• Package TypeScript Template: Opinionated setup for a single package TypeScript project
• Serverless TypeScript Template: Opinionated setup for a Serverless TypeScript project
• VSCode Extension Template: Opinionated setup for a VSCode extension with TypeScript

Hackathon builds and proofs of concept. Fun to make, not maintained.

• expect.toMatchPrompt() npm: An AI prompt matcher for Jest and Vitest
• Lambdalet.AI web: An AI-powered bookmarking and read-it-later service that sends the current page's HTML from a bookmarklet to an AWS Lambda function, which invokes an LLM to extract the main content and saves it to a Notion database
• PromptThis.AI chrome: A Chrome extension created for the Google Chrome Built-in AI Challenge that seamlessly integrates AI capabilities into your browsing experience
• AdaGPT action: A GitHub Action created for the GitHub + DEV 2023 Hackathon with OpenAI integration that responds to comments on issues and pull requests
• Highlights web: Extracts highlighted text from images using OpenCV and OCR (Tesseract) directly in the browser, without a backend API. Based on the original Python implementation
• Lambda Readability web: Extracts readable content from a web page by running Chromium and Readability.js on AWS Lambda
• Puppeteer Language Experiment web: Tests various methods to change the browser language using Puppeteer with Chrome