diff-rationale: An Open-Source CLI to Log AI Coding Agent's Reasoning via Git
cameronmcateer · reddit · 2026-08-14
A developer shared diff-rationale, a CLI tool designed to preserve the "why" behind code changes made by AI coding agents like Claude.
- Mechanism: It stages a rationale record for every git diff chunk when an agent commits. Once changes land in an enforced branch, it "mints" the journal so every line has an explanation.
- Storage & Query: Records are stored in a separate git ref to avoid worktree clutter. Users can query the reasoning for any file part later, with a VS Code plugin for visualization.
- Usage: Built primarily for autonomous coding agents, it also features an interview mode that prompts users with schema-defined questions to stage records manually.
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