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Hi HN, I built Repomap, a tool that generates interactive architecture diagrams from any GitHub repository. It uses a Rust + tree-sitter engine to analyze the codebase and produces a D3-based graph UI with clustering, zoom/pan, and live progress updates

HN · launched Feb 8, 2026 · 7 upvotes (top 62%) · 0 views

Niche: codebase visualization tools · 89 launches, 4 in the last 7 days ▼ -43% · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Developer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 89 launches in codebase visualization tools →

Could you build this?

Partial Building a basic repository visualizer or D3 frontend is easy, but reliably generating AST-level call/dependency graphs across multiple programming languages requires low-level tree-sitter AST traversal in Rust.

What it would actually take: The architecture involves a Rust backend embedding multiple Tree-sitter language grammars to extract symbol definitions, call hierarchies, and imports across diverse file formats. It generates a graph data structure representing modules, dependencies, and clusters, streaming updates via WebSockets or SSE to a frontend leveraging D3.js or WebGL graph engines (like Cytoscape or ForceGraph) with clustering algorithms (e.g., Louvain). Deep familiarity with compiler ASTs, language parsers, and Rust-to-JS data serialization is necessary.

Discussion

1 comment analyzed.

Competitors mentioned: GitHub code browsing, grep, IDE built-in navigation

Concerns raised: Dependency graphs become hairballs with large codebases, Handling dynamic imports (Python `import *`, JavaScript dynamic require), Resolving barrel exports and ambiguous edges

Feature requests: Clustering by call patterns or import frequency instead of just folder structure, Smart collapsing/expanding that doesn't require pre-existing architecture knowledge

Competitors

Other products that read as similar to this one : 351 launches clear the similarity bar, closest 8 shown.

Attention rank: #196 of 352 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 99 days after the earliest competitor.

  • appgraph · github · 2026-09-11 · 17 upvotes · similarity 0.56
  • cartograph · github · 2026-09-28 · 10 upvotes · similarity 0.56
  • Gitdot · hn · 2026-06-08 · 334 upvotes · similarity 0.54
  • Tool to turn a repo into map · hn · 2026-07-27 · 5 upvotes · similarity 0.53
  • Pretty Git Tree · hn · 2026-10-29 · 5 upvotes · similarity 0.51
  • RepoMap · ph · 2026-10-01 · 2 upvotes · similarity 0.50
  • gitropolis · github · 2026-10-20 · 23 upvotes · similarity 0.48
  • Codemap · hn · 2026-11-04 · 45 upvotes · similarity 0.48

Related data

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