gdd-reapply-patches

name	gdd-reapply-patches
description	Reapply user modifications to reference/ files after a plugin update. Detects customizations via git diff against pristine baseline.
argument-hint	[--dry-run]
tools	Read, Write, Bash
disable-model-invocation	true

gdd-reapply-patches

Re-applies user customizations to reference/*.md files after /gdd:update resyncs the plugin. Customizations are detected by diffing each reference/ file against a pristine baseline stored in .gdd-baseline/.

Steps

1. Detect baseline - check for .gdd-baseline/reference/. If it does not exist, warn the user and offer to initialize it from the current reference/ state (no diffs will be generated on this run; the next /gdd:update will use the new baseline).
2. Generate diffs - for each reference/*.md, run git diff --no-index .gdd-baseline/reference/<file> reference/<file> (or plain diff -u). Non-empty diffs are candidate user patches.
3. Review patches - for each non-empty diff, print the hunk and ask: Apply this customization to the updated reference/<file>? (yes/no/view). view shows the full diff; yes queues the patch; no skips it.
4. Apply - for each confirmed patch, apply it with patch -p0 or with a targeted Edit call. Log every applied patch.
5. Refresh baseline - after applying, copy the current reference/*.md tree into .gdd-baseline/reference/ to record the new pristine-for-this-user state.
6. Dry-run - if --dry-run is passed, perform steps 1–3 but do not apply patches or refresh the baseline.

Design note

.gdd-baseline/ is per-install and user-local. It must be gitignored by the host project - it is never committed to the plugin repo.

Output

End every invocation with:

## REAPPLY-PATCHES COMPLETE