Show HN: Lantern Lattice – the call graph from your compiler, for coding agents

Category: devtools

Tags: call-graph, mcp, coding-agents, static-analysis, rust

Score: 7.8/10 (Innovation: 8, Technical: 8, Documentation: 8, Utility: 7)

Lantern Lattice builds an exact call graph for multiple languages by driving the language's own compiler or type checker (rust-analyzer, tsrs, pyrefly, scip-go, clangd), then exposes it both as a CLI and as MCP tools for coding agents, so agents can trace callers/callees, measure impact, and edit by symbol instead of relying on grep. It also provides a live WebGPU visualization of the graph. The concept of grounding agent tooling in compiler-resolved symbol data rather than text search is a meaningful and technically demanding combination.

Target audience: backend developers, AI coding agent users, tooling engineers

Repository: https://github.com/julymetodiev/lantern-lattice · Rust · MIT

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