feat: add design-conformance-reviewer agent, weekly-shipped skill, fix counts and worktree constraints

- Add design-conformance-reviewer agent for reviewing code against design docs
- Add weekly-shipped skill for stakeholder summaries from Jira/GitHub
- Fix component counts across marketplace.json, plugin.json, and README
- Add worktree constraints to ce-review and resolve_todo_parallel skills
- Fix typo in resolve_todo_parallel SKILL.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/skills/ce-review/SKILL.md

@@ -86,6 +86,12 @@ Run all agents simultaneously for speed. If you hit context limits, retry with `
 
 #### Parallel Agents to review the PR:
 
+<worktree_constraint>
+
+**IMPORTANT: Do NOT create worktrees per review agent.** A worktree or branch was already set up in Phase 1 (or provided in the original prompt from `/ce:work`). All review agents run in that same checkout. If a worktree path was provided, `cd` into it. Otherwise, find the worktree where the target branch is checked out using `git worktree list`. Never pass `isolation: "worktree"` when spawning review agents — they are read-only and share the existing checkout.
+
+</worktree_constraint>
+
 <parallel_tasks>
 
 **Parallel mode (default for ≤5 agents):**