Treepeat – Code similarity detection using Tree-sitter
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treepeat is a tool that finds similarities in your codebase.Find duplicate code blocks meaningful to the language (classes/functions), not just lines.Find near-duplicates: ignore whitespace, strings, high level AST nodes such as function and names.Find structurally similar code: anonymize identifiers, constants, etc.Pull requests welcome: This is very much an proof of concept - I'm happy with it, but I haven't supported very many languages at present.Languages supported: astro, bash, css, go, html, javascript, lua, markdown (plus codeblocks), python, sql, typescript, java, kotlin, rust, yaml
HN · launched Sep 22, 2026 · 70 upvotes (top 12%) · 0 views
Niche: code and binary analysis tools · 118 launches, 4 in the last 7 days ▼ -56% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 118 launches in code and binary analysis tools →
Could you build this?
Yes Treepeat is an AST-based code similarity detector utilizing existing Tree-sitter bindings. A developer can build this with AI assistance by writing a CLI tool that parses code with Tree-sitter, normalizes node identifiers, and runs hash or rolling-hash comparisons across subtrees.
Discussion
3 comments analyzed.
Competitors mentioned: slopdex
Competitors
Other products that read as similar to this one : 218 launches clear the similarity bar, closest 8 shown.
Attention rank: #21 of 219 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 315 days after the earliest competitor.
- CodeRLM · hn · 2026-02-11 · 81 upvotes · similarity 0.49
- CLI tool for detecting non-exact code duplication with embedding models · hn · 2026-07-02 · 91 upvotes · similarity 0.49
- Sqry · hn · 2026-03-06 · 5 upvotes · similarity 0.45
- beet · github · 2026-10-07 · 15 upvotes · similarity 0.44
- kirari · github · 2026-10-18 · 69 upvotes · similarity 0.43
- Duplicate Content Finder · ph · 2026-10-02 · 2 upvotes · similarity 0.43
- Anyone interested in a tool helps to explore C++ ASTs · hn · 2026-05-21 · 49 upvotes · similarity 0.42
- Structural code grep across public GitHub repositories · hn · 2026-08-22 · 15 upvotes · similarity 0.42
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