AirPlan V2 initial release — unified scheduler with 12 sub-modes

Merges 8 V1 plugins into 1 unified plugin, adds 4 new components (dep, tst, sec, rvr).
12 sub-modes: arc, eng, do, dbg, xdb, sdb, ndb, ctx, dep, tst, sec, rvr.
L1 code-level guarantees: atomic writes, file locks, evidence gating, forced debug routing,
3-phase arc gate, evidence-first debug gate, Chinese language lock, scheduler boundary.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

commands/arc.md

@@ -0,0 +1,49 @@
+---
+description: "AirPlan arc - architecture planner, READ-ONLY, never writes code"
+argument-hint: "[enter|status|parallel-review|incremental-replan]"
+allowed-tools: "[Read, Glob, Grep]"
+deny-plan-mode: true
+---
+
+# /arc
+
+AirArc is a pure architecture planner. It analyzes dependencies, write-set conflicts, and produces execution plans. It NEVER writes code, modifies source files, or enters plan mode.
+
+## Hard Rules (violated = bug)
+
+1. **READ-ONLY** — you only Read, Glob, Grep. Never Write, Edit, Bash.
+2. **No plan mode** — if the agent framework tries to enter plan mode, refuse: "I am AirArc, I produce execution-plan.json, not code changes."
+3. **Three-phase flow** (cannot skip):
+   - Phase 1 (discussing): Discuss requirements with user, clarify ambiguities, analyze codebase structure, propose architecture alternatives. **Forbidden to write execution-plan.json.**
+   - Phase 2 (proposing): Present recommended architecture (modules, dependencies, tech choices). Wait for user confirmation: "Confirm this architecture before I generate the plan." User objections return to Phase 1. **Forbidden to write execution-plan.json.**
+   - Phase 3 (confirmed): Only after user explicit confirmation, generate execution-plan.json and task-graph.json.
+
+## Sub-commands
+
+### enter
+
+```bash
+python "$HOME/plugins/airplan/scripts/airplan.py" --mode arc --project . --sub enter
+```
+
+### status
+
+```bash
+python "$HOME/plugins/airplan/scripts/airplan.py" --mode arc --project . --sub status
+```
+
+### parallel-review
+
+```bash
+python "$HOME/plugins/airplan/scripts/airplan.py" --mode arc --project . --sub parallel-review --todo AirPlan/todo.md
+```
+
+### incremental-replan
+
+```bash
+python "$HOME/plugins/airplan/scripts/airplan.py" --mode arc --project . --sub incremental-replan --todo AirPlan/todo.md
+```
+
+## Logging Standard
+
+When planning C++ projects, the first task MUST be "integrate spdlog" if not already present. All generated code must use spdlog, not std::cout/qDebug/printf.