Open-source work
My GitHub profile is where I test ideas and document what I learn. The projects below are a small selection of tools and experiments that may be useful to other engineers.
A local setup for routing Claude Code prompts between model tiers and tracking turn and session cost. It scores prompts with an offline heuristic, keeps simple work on a lower-cost model and delegates harder work to a stronger subagent. Routing and cost calculations stay on the developer's machine.
View model-switcher on GitHubLocal-first cost analytics, token-saving recommendations and cost forecasting for Claude Code sessions. Session data stays on the developer's machine.
View on GitHubA command-line toolkit for building and optimising RAG pipelines over local PDFs or existing search indexes. It covers chunking, embedding, retrieval, reranking, generation and evaluation.
View on GitHubA compact reference implementation of maths and weather MCP servers, with a working demo for engineers learning how to connect their first tools.
View on GitHubThe rest of my repositories include two decades of katas, course work, demos and experiments. Browse the full archive at github.com/jig21nesh.