feat(plugin): reorganize compounding-engineering v2.0.0

Major restructure of the compounding-engineering plugin:

## Agents (24 total, now categorized)
- review/ (10): architecture-strategist, code-simplicity-reviewer,
  data-integrity-guardian, dhh-rails-reviewer, kieran-rails-reviewer,
  kieran-python-reviewer, kieran-typescript-reviewer,
  pattern-recognition-specialist, performance-oracle, security-sentinel
- research/ (4): best-practices-researcher, framework-docs-researcher,
  git-history-analyzer, repo-research-analyst
- design/ (3): design-implementation-reviewer, design-iterator,
  figma-design-sync
- workflow/ (6): bug-reproduction-validator, every-style-editor,
  feedback-codifier, lint, pr-comment-resolver, spec-flow-analyzer
- docs/ (1): ankane-readme-writer

## Commands (15 total)
- Moved workflow commands to commands/workflows/ subdirectory
- Added: changelog, create-agent-skill, heal-skill, plan_review,
  prime, reproduce-bug, resolve_parallel, resolve_pr_parallel

## Skills (11 total)
- Added: andrew-kane-gem-writer, codify-docs, create-agent-skills,
  dhh-ruby-style, dspy-ruby, every-style-editor, file-todos,
  frontend-design, git-worktree, skill-creator
- Kept: gemini-imagegen

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/compounding-engineering/skills/create-agent-skills/workflows/add-workflow.md

@@ -0,0 +1,120 @@
+# Workflow: Add a Workflow to Existing Skill
+
+<required_reading>
+**Read these reference files NOW:**
+1. references/recommended-structure.md
+2. references/workflows-and-validation.md
+</required_reading>
+
+<process>
+## Step 1: Select the Skill
+
+**DO NOT use AskUserQuestion** - there may be many skills.
+
+```bash
+ls ~/.claude/skills/
+```
+
+Present numbered list, ask: "Which skill needs a new workflow?"
+
+## Step 2: Analyze Current Structure
+
+Read the skill:
+```bash
+cat ~/.claude/skills/{skill-name}/SKILL.md
+ls ~/.claude/skills/{skill-name}/workflows/ 2>/dev/null
+```
+
+Determine:
+- **Simple skill?** → May need to upgrade to router pattern first
+- **Already has workflows/?** → Good, can add directly
+- **What workflows exist?** → Avoid duplication
+
+Report current structure to user.
+
+## Step 3: Gather Workflow Requirements
+
+Ask using AskUserQuestion or direct question:
+- What should this workflow do?
+- When would someone use it vs existing workflows?
+- What references would it need?
+
+## Step 4: Upgrade to Router Pattern (if needed)
+
+**If skill is currently simple (no workflows/):**
+
+Ask: "This skill needs to be upgraded to the router pattern first. Should I restructure it?"
+
+If yes:
+1. Create workflows/ directory
+2. Move existing process content to workflows/main.md
+3. Rewrite SKILL.md as router with intake + routing
+4. Verify structure works before proceeding
+
+## Step 5: Create the Workflow File
+
+Create `workflows/{workflow-name}.md`:
+
+```markdown
+# Workflow: {Workflow Name}
+
+<required_reading>
+**Read these reference files NOW:**
+1. references/{relevant-file}.md
+</required_reading>
+
+<process>
+## Step 1: {First Step}
+[What to do]
+
+## Step 2: {Second Step}
+[What to do]
+
+## Step 3: {Third Step}
+[What to do]
+</process>
+
+<success_criteria>
+This workflow is complete when:
+- [ ] Criterion 1
+- [ ] Criterion 2
+- [ ] Criterion 3
+</success_criteria>
+```
+
+## Step 6: Update SKILL.md
+
+Add the new workflow to:
+
+1. **Intake question** - Add new option
+2. **Routing table** - Map option to workflow file
+3. **Workflows index** - Add to the list
+
+## Step 7: Create References (if needed)
+
+If the workflow needs domain knowledge that doesn't exist:
+1. Create `references/{reference-name}.md`
+2. Add to reference_index in SKILL.md
+3. Reference it in the workflow's required_reading
+
+## Step 8: Test
+
+Invoke the skill:
+- Does the new option appear in intake?
+- Does selecting it route to the correct workflow?
+- Does the workflow load the right references?
+- Does the workflow execute correctly?
+
+Report results to user.
+</process>
+
+<success_criteria>
+Workflow addition is complete when:
+- [ ] Skill upgraded to router pattern (if needed)
+- [ ] Workflow file created with required_reading, process, success_criteria
+- [ ] SKILL.md intake updated with new option
+- [ ] SKILL.md routing updated
+- [ ] SKILL.md workflows_index updated
+- [ ] Any needed references created
+- [ ] Tested and working
+</success_criteria>