PatchDiet

Your AI coding agent passed the tests. The PR was still bloated.

PatchDiet shrinks AI-generated pull requests into the smallest reviewable patch that still passes your checks.

npx patchdiet shrink --base origin/main --head HEAD --test "pnpm test"

Example

Before PatchDiet:

• 4 files changed
• 14 changed lines
• 4 hunks
• tests passing, but review scope is inflated

After PatchDiet:

• 1 file changed
• 4 changed lines
• 1 hunk
• tests still passing
• cleanup patch generated
• line reduction: 71%

What it removes

• unrelated refactors
• formatting-only hunks
• stale comments
• dependency bumps outside scope
• files that do not affect the requested behavior

What it is not

PatchDiet is not an AI code reviewer.

It is not a coding agent.

It does not upload your code.

It is a patch minimizer for AI-generated diffs.

Commands

• patchdiet init
• patchdiet check --base origin/main --head HEAD
• patchdiet shrink --base origin/main --head HEAD --test "node --test"
• patchdiet shrink --base origin/main --head HEAD --test "node --test" --create-branch
• patchdiet report --format github
• patchdiet report --format json

Repo Layout

• packages/core: diff parsing, config, shrink engine
• packages/report: markdown/html/github renderers
• packages/cli: command line interface
• packages/action: GitHub Action wrapper
• examples/*: reproducible demo scenarios

Safety

• local-first by default
• no source upload
• does not rewrite the current branch in place
• produces cleanup artifacts under .patchdiet/

Status

v0.1 currently ships conservative hunk-level reduction and reproducible TypeScript, Python, and monorepo demo flows. AST-level atoms, richer dependency reasoning, and benchmark datasets are planned but not included in this version.