feat: add MCP server for semantic code search with FastMCP integration

.claude/skills/wf-composer/specs/node-catalog.md

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+# Node Catalog — Available Executors
+
+All executors available for node resolution in Phase 2.
+
+## Skill Nodes
+
+| Executor | Type | Input Ports | Output Ports | Typical Args Template |
+|----------|------|-------------|--------------|----------------------|
+| `workflow-lite-plan` | skill | requirement | plan | `"{goal}"` |
+| `workflow-plan` | skill | requirement, specification | detailed-plan | `"{goal}"` |
+| `workflow-execute` | skill | detailed-plan, verified-plan | code | `--resume-session {prev_session_id}` |
+| `workflow-test-fix` | skill | failing-tests, code | test-passed | `--session {prev_session_id}` |
+| `workflow-tdd-plan` | skill | requirement | tdd-tasks | `"{goal}"` |
+| `workflow-multi-cli-plan` | skill | requirement | multi-cli-plan | `"{goal}"` |
+| `review-cycle` | skill | code, session | review-findings | `--session {prev_session_id}` |
+| `brainstorm` | skill | exploration-topic | brainstorm-analysis | `"{goal}"` |
+| `spec-generator` | skill | requirement | specification | `"{goal}"` |
+
+## Command Nodes (namespace skills)
+
+| Executor | Type | Input Ports | Output Ports | Typical Args Template |
+|----------|------|-------------|--------------|----------------------|
+| `workflow:refactor-cycle` | command | codebase | refactored-code | `"{goal}"` |
+| `workflow:integration-test-cycle` | command | requirement | test-passed | `"{goal}"` |
+| `workflow:brainstorm-with-file` | command | exploration-topic | brainstorm-document | `"{goal}"` |
+| `workflow:analyze-with-file` | command | analysis-topic | discussion-document | `"{goal}"` |
+| `workflow:debug-with-file` | command | bug-report | understanding-document | `"{goal}"` |
+| `workflow:collaborative-plan-with-file` | command | requirement | plan-note | `"{goal}"` |
+| `workflow:roadmap-with-file` | command | requirement | execution-plan | `"{goal}"` |
+| `workflow:unified-execute-with-file` | command | plan-note, discussion-document | code | (no args — reads from session) |
+| `issue:discover` | command | codebase | pending-issues | (no args) |
+| `issue:plan` | command | pending-issues | issue-plans | `--all-pending` |
+| `issue:queue` | command | issue-plans | execution-queue | (no args) |
+| `issue:execute` | command | execution-queue | completed-issues | `--queue auto` |
+| `issue:convert-to-plan` | command | plan | converted-plan | `--latest-lite-plan` |
+| `team-planex` | skill | requirement, execution-plan | code | `"{goal}"` |
+
+## CLI Nodes
+
+CLI nodes use `ccw cli` with a tool + mode + rule.
+
+| Use Case | cli_tool | cli_mode | cli_rule |
+|----------|----------|----------|----------|
+| Architecture analysis | gemini | analysis | analysis-review-architecture |
+| Code quality review | gemini | analysis | analysis-review-code-quality |
+| Bug root cause | gemini | analysis | analysis-diagnose-bug-root-cause |
+| Security assessment | gemini | analysis | analysis-assess-security-risks |
+| Performance analysis | gemini | analysis | analysis-analyze-performance |
+| Code patterns | gemini | analysis | analysis-analyze-code-patterns |
+| Task breakdown | gemini | analysis | planning-breakdown-task-steps |
+| Architecture design | gemini | analysis | planning-plan-architecture-design |
+| Feature implementation | gemini | write | development-implement-feature |
+| Refactoring | gemini | write | development-refactor-codebase |
+| Test generation | gemini | write | development-generate-tests |
+
+**CLI node args_template format**:
+```
+PURPOSE: {goal}
+TASK: • [derived from step description]
+MODE: analysis
+CONTEXT: @**/* | Memory: {memory_context}
+EXPECTED: [derived from step output_ports]
+CONSTRAINTS: {scope}
+```
+
+## Agent Nodes
+
+| subagent_type | Use Case | run_in_background |
+|---------------|----------|-------------------|
+| `general-purpose` | Freeform analysis or implementation | false |
+| `team-worker` | Worker in team-coordinate pipeline | true |
+| `code-reviewer` | Focused code review | false |
+
+**Agent node args_template format**:
+```
+Task: {goal}
+
+Context from previous step:
+{prev_output}
+
+Deliver: [specify expected output format]
+```
+
+## Checkpoint Nodes
+
+Checkpoints are auto-generated — not selected from catalog.
+
+| auto_continue | When to Use |
+|---------------|-------------|
+| `true` | Background save, execution continues automatically |
+| `false` | Pause for user review before proceeding |
+
+Set `auto_continue: false` when:
+- The next node is user-facing (plan display, spec review)
+- The user requested an explicit pause in their workflow description
+- The next node spawns a background agent (give user chance to cancel)