Show HN: Suture – Semantic merge for 18 file formats (JSON, YAML, XML, CSV, Word, Excel, PDF...)

I built Suture because I was tired of manually resolving merge conflicts in YAML configs, JSON manifests, and XML layouts at work. Git's line-based merge doesn't understand file structure, so it creates false conflicts when two people edit different keys in the same JSON file.

Suture does structural 3-way merge. It parses files into their AST, identifies what actually changed, and merges intelligently:

• JSON/YAML/TOML: merge different keys/sections automatically
• XML: merge different elements and attributes
• CSV: merge different rows and columns
• Word/Excel/PDF: binary-aware merge
• SQL: merge DDL statements
• HTML/Markdown: merge different sections
• SVG: merge different elements
• Images: pixel-level merge
• And 8 more formats...

It works as:

1. Git merge driver (git merge-file) — drop-in replacement
2. CLI tool (suture merge)
3. REST API (merge-as-a-service)
4. Web UI (try it live)
5. VS Code extension
6. Rust library

The core merge engine is ~131K lines of Rust, has 1,550+ tests, and is verified via extensive property-based testing using patch theory. The self-hosted hub is always free (AGPL-3.0). We also have a hosted platform with a free tier (100 merges/month).

Tech: Rust, Axum, SQLite, Wasmtime, Raft consensus, 32 crates on crates.io

GitHub: https://github.com/WyattAu/suture Try the merge tool: https://suture.dev Docs: https://wyattau.github.io/suture/