Sync Claude Code Plugins

User request: $ARGUMENTS

Sync prompt-engineering plugin components from a local sibling clone of claude-code-plugins into this repo's .claude/ directory. The plugin OWNS only the files it ships — other content in .claude/agents/ and .claude/skills/ (manifest-dev sync, KB skills, anything else) must be left alone.

Source & Target

Sync scope

prompt-engineering ships no hooks today.

Territory model

Deletion invariant: only items in tracked (the previously-synced set) are eligible for removal when they disappear upstream. Items never in tracked are invisible — that's how project-local content stays safe.

The tracked set lives in .claude/.claude-code-plugins-sync.json:

{
  "version": 1,
  "last_synced_at": "ISO-8601 timestamp",
  "agents": ["<agent-file>.md", "..."],
  "skills": ["<skill-dir>", "..."]
}

First run (file missing): tracked is empty, no deletions happen, file is written at end.

Sync algorithm

Pre-flight: if the source is a clean git repo, git pull --ff-only first; surface a warning and proceed if pulling fails.

Then, when <source_repo>/claude-plugins/prompt-engineering/ is missing, decide which of two different situations produced that one signal before doing anything else. A misconfigured path and a retired-upstream plugin look identical from the target side, and treating retirement as misconfiguration is what strands a retirement: the tracked items stay forever, because the only machinery that could remove them refuses to run.

• Misconfigured path — the default. <source_repo> itself does not resolve, is not a git repository, or is a partial or mid-clone checkout. Abort. Delete nothing, and leave the tracking file untouched.
• Confirmed upstream removal. <source_repo> resolves to a healthy full clone, and its own history shows the plugin deliberately removed — a commit deleting claude-plugins/prompt-engineering/, and a decision record in <source_repo>/docs/adr/ stating the retirement. Both are required: a directory absent from a healthy clone with no such history is still treated as misconfiguration. On confirmation, run the sync with an empty source listing — every tracked item becomes eligible for deletion under the ordinary tracked − source rule, the .agents/ mirror symlinks go with them, and the tracking file is left with empty agents and skills arrays. Add the removed components to the retirement denylist in the same change, so a stale checkout cannot reintroduce them, and record the propagation in this repo's own docs/adr/.

When the evidence for removal is not available — no access to the source repo's history, or history that does not settle it — take the misconfigured-path branch. Aborting costs a stale copy that a later run fixes; deleting on a wrong reading costs files no run restores.

For each component (agents/skills):

• Copy every source item over its target path. Skip if target is a symlink. Skip retired items (see denylist below) even when an older upstream checkout still ships them.
• Re-apply local metadata after copying: every non-symlink synced skill's SKILL.md must carry metadata: / internal: true in its frontmatter — add it back when the upstream copy lacks it. Synced skills are repo-maintenance tooling in this repo; the flag keeps skill pickers and directory scrapers from listing them as product skills.
• Delete items in tracked − source from target. Skip if target is a symlink, doesn't exist, or is the sync-claude-code-plugins skill itself.
• Refresh .claude/.claude-code-plugins-sync.json with the current source listing minus the denylist.

Source listing excludes README.md and .claude-plugin/ (plugin metadata, not content).

Retirement denylist (never copy or track, regardless of upstream):

The last five were retired as capability lost, not capability moved — there is no replacement to point at, and an older upstream checkout that still ships them must not reintroduce them. All seven are already dropped from the tracked set.

.agents mirror

After each sync, ensure .agents/skills/<name> is a symlink to ../../.claude/skills/<name> for every tracked skill, and remove the symlink for any skill removed from tracked. This lets non-Claude coding agents (Codex, etc.) read the same skills without duplicating content. Only skills are mirrored — .agents/agents/ is out of scope.

• Create the symlink if missing.
• If .agents/skills/<name> exists and is not a symlink, skip it — that's project-local content, don't clobber.
• Create .agents/skills/ if missing, but never .agents/ itself (the user opts in by creating it).

Gotchas

• Upstream copies drop the internal flag. Upstream claude-code-plugins skills ship without metadata: internal: true; a plain copy silently reverts the flag on the non-symlink synced skills (observed 2026-07-05). The re-apply step above exists for this — do not skip it.

• Source must exist: missing source path means abort, not "delete all tracked items."

• Nested skills directory: source skills live one directory down, at skills/<skill-name>/. Copy each skill directory into .claude/skills/<skill-name>/ — don't copy the outer skills/ folder or you get .claude/skills/skills/.

• prompt-engineering and review-prompt are plugin-owned, not upstream: manifest-dev-tools ships its own versions of both skills, symlinked at .claude/skills/prompt-engineering and .claude/skills/review-prompt. The upstream plugin ships skills with the same names, but the "skip if target is a symlink" rule above means this sync leaves the plugin's symlinks alone (it neither overwrites nor deletes them). Do not re-add either to the tracking file.

• Symlinks look like directories to cp/rm/find: a symlinked target overwritten by cp -R corrupts the linked plugin's source files; a symlinked directory deleted by rm -rf removes the link, not the plugin, but a recursive find that follows the link will. Use [ -L path ] before every overwrite and every delete.

Output

Summary table per component (agents/skills): items added, updated, removed, symlinks skipped, and removals refused (e.g. due to symlink). Show the net change to the tracking file.

Never

• Overwrite, remove, or follow into symlinks under .claude/ — check [ -L path ] before every copy, delete, or recursive descent
• Replace a non-symlink at .agents/skills/<name> — leave project-local content alone
• Create .agents/ itself (only manage .agents/skills/<name> entries inside an existing .agents/)
• Delete items not in the tracked set — even if they're not in source
• Delete the sync-claude-code-plugins skill
• Treat a missing source path as upstream removal on the absence alone — abort unless the source repo's own history confirms a deliberate removal, per the pre-flight
• Copy plugin metadata (README.md, .claude-plugin/) or the source repo's own .claude/ directory
• Modify the source repo (other than the optional git pull --ff-only)