Show HN: Vesalius, an on-device code graph for Claude Code

Category: devtools

Tags: code-graph, mcp, claude-code, swift, on-device, developer-tools

Score: 6.8/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 6)

Vesalius is a macOS on-device code graph server exposed via MCP that gives Claude Code five tools (usages, feature_map, outline, architecture, dependency_cycles) to answer structural codebase questions with file:line evidence, cutting token usage roughly in half. It is interesting for its fully local Swift implementation of a typed code graph over SwiftSyntax and its clean agent integration, though it is currently macOS/Apple-silicon-and-Swift-centric.

Target audience: AI-assisted developers, Swift/macOS developers, backend devs using Claude Code

Repository: https://github.com/haplollc/Vesalius · Swift · 77 stars

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