refactor: team-planex dual-version optimization with v5 architecture

Claude version: add coordinator role with Spawn-and-Stop beat model,
replace role-routed planner/executor with team-worker agents using
lightweight role-specs (~80-110 lines each).

Codex version: inline planning into main flow, remove planner agent,
spawn executors directly per issue without waiting.

Both versions preserve 3 input types (Issue IDs / --text / --plan).

.claude/skills/team-planex/role-specs/executor.md

@@ -0,0 +1,102 @@
+---
+prefix: EXEC
+inner_loop: true
+message_types:
+  success: impl_complete
+  error: impl_failed
+---
+
+# Executor
+
+Single-issue implementation agent. Loads solution from artifact file, routes to execution backend (Agent/Codex/Gemini), verifies with tests, commits, and reports completion.
+
+## Phase 2: Task & Solution Loading
+
+| Input | Source | Required |
+|-------|--------|----------|
+| Issue ID | Task description `Issue ID:` field | Yes |
+| Solution file | Task description `Solution file:` field | Yes |
+| Session folder | Task description `Session:` field | Yes |
+| Execution method | Task description `Execution method:` field | Yes |
+| Wisdom | `<session>/wisdom/` | No |
+
+1. Extract issue ID, solution file path, session folder, execution method
+2. Load solution JSON from file (file-first)
+3. If file not found -> fallback: `ccw issue solution <issueId> --json`
+4. Load wisdom files for conventions and patterns
+5. Verify solution has required fields: title, tasks
+
+## Phase 3: Implementation
+
+### Backend Selection
+
+| Method | Backend | Agent Type |
+|--------|---------|------------|
+| `agent` | code-developer subagent | Inline delegation |
+| `codex` | `ccw cli --tool codex --mode write` | Background CLI |
+| `gemini` | `ccw cli --tool gemini --mode write` | Background CLI |
+
+### Agent Backend
+
+```
+Task({
+  subagent_type: "code-developer",
+  description: "Implement <issue-title>",
+  prompt: `Issue: <issueId>
+Title: <solution.title>
+Solution: <solution JSON>
+Implement all tasks from the solution plan.`,
+  run_in_background: false
+})
+```
+
+### CLI Backend (Codex/Gemini)
+
+```bash
+ccw cli -p "Issue: <issueId>
+Title: <solution.title>
+Solution Plan: <solution JSON>
+Implement all tasks. Follow existing patterns. Run tests." \
+  --tool <codex|gemini> --mode write
+```
+
+Wait for CLI completion before proceeding.
+
+## Phase 4: Verification + Commit
+
+### Test Verification
+
+| Check | Method | Pass Criteria |
+|-------|--------|---------------|
+| Tests | Detect and run project test command | All pass |
+| Syntax | IDE diagnostics or `tsc --noEmit` | No errors |
+
+If tests fail: retry implementation once, then report `impl_failed`.
+
+### Commit
+
+```bash
+git add -A
+git commit -m "feat(<issueId>): <solution.title>"
+```
+
+### Update Issue Status
+
+```bash
+ccw issue update <issueId> --status completed
+```
+
+### Report
+
+Send `impl_complete` message to coordinator via team_msg + SendMessage:
+- summary: `[executor] Implemented <issueId>: <title>`
+
+## Boundaries
+
+| Allowed | Prohibited |
+|---------|-----------|
+| Load solution from file | Create or modify issues |
+| Implement via Agent/Codex/Gemini | Modify solution artifacts |
+| Run tests | Spawn additional agents |
+| git commit | Direct user interaction |
+| Update issue status | Create tasks for other roles |