Cross-platform interactive function call graph navigator for modern languages
Developers who used to rely on Sourcetrail (archived 2021) keep asking for a successor that can ingest a TypeScript, Python, Rust, or Go repo and give them a clickable, zoomable call graph to reason about unfamiliar codebases. Existing IDE features give local 'peek references' but no whole-repo map.
builder note
Build on tree-sitter + LSP and ship as a local web app (not a VS Code extension) so it works across editors. The wedge is onboarding to a new repo on day one, not replacing go-to-definition.
landscape (3 existing solutions)
The dedicated category essentially died with Sourcetrail. Current tools either target enterprise buyers or give only local hop-by-hop navigation inside an editor.
NumbatUI Community fork of Sourcetrail, early-stage and does not support modern JS/TS monorepos out of the box
Augoor Enterprise-focused code knowledge graph, not something a solo developer can point at a local repo in 5 minutes
IDE Call Hierarchy (VS Code, JetBrains) Single-function drill-down only, no whole-repo map, no cross-language support
sources (2)
hn https://news.ycombinator.com/item?id=46345827 "I'd kill for a Sourcetrail that actually gets maintained" 2026-04-10
other https://github.com/CoatiSoftware/Sourcetrail "development discontinued... community still requesting maintained fork" 2026-04-01