re-binary-diff
Enables read-only binary diff and fingerprinting of files without writing to disk, providing structured diffs and per-section SHA-256 hashes.
README
re-binary-diff
MCP server for read-only binary comparison: a unified diff between two files, and a per-section fingerprint of one file. Dry-run only — the server never writes a byte to disk.
Why
The 2026-06-05 stress test surfaced a need to compare an
original binary against a patched copy (the Output/.../patches/
workflow) without re-introducing the on-disk patch primitive.
re-binary-diff is the read-only cousin: it reports the diff,
it never applies it.
Tools
| Tool | What it does |
|---|---|
check_binary_diff |
Health check — re-binary-diff has no system deps; always status: OK |
unified_diff |
Run difflib.unified_diff over the byte streams of two files (or, if too large, hash their chunks) and return a structured diff |
fingerprint_sections |
Return per-chunk SHA-256 + offset + size for a single file (a structural fingerprint, like re-lief.normalize_for_diff but at chunk granularity) |
Install
Part of the RE-AI plugin; ./install.sh installs the package. To
install standalone:
pip install -e ./servers/re-binary-diff
Run
re-binary-diff # stdio transport (default for MCP)
python -m re_binary_diff # equivalent
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