chore: push all design docs, V2 plan specs, and current working state

Includes AirPlan design documents, AircOding-alpha1-plan, AirPlanV2,
AirPlan-ParaV2, AirPlan-Para V1 reference docs, and all working code
changes across packages.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

AirPlan/docs/spec/AirPlan-ParaV2/plugins/airarc/skills/airarc/SKILL.md

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+---
+name: airarc
+description: Architecture-first workflow with built-in post-plan parallelization review. Use when planning should emit dependency edges, parallel groups, write-set conflicts, and serialization points for AirEng. AirArc plans and edits planning docs only; it does not write code.
+---
+
+# AirArc
+
+## Upgrade Notes
+
+- Keep the original architecture-first planning role.
+- AirArc is an architect-only workflow: it may plan tasks and edit architecture or planning documents, but it must not implement code changes.
+- Add built-in post-plan review instead of a separate review-only plugin.
+- Emit engine-consumable execution artifacts after planning.
+
+## Outputs
+
+- `AirPlan/state/airarc/state.json`
+- `AirPlan/state/airarc/reviews/parallel-review.json`
+- `AirPlan/state/airarc/reviews/parallel-review.md`
+- `AirPlan/state/airarc/reviews/execution-plan.json`
+- `AirPlan/state/airarc/reviews/execution-plan.md`
+
+## Review Responsibilities
+
+- Compute dependency edges.
+- Compute parallel-safe groups.
+- Detect shared write-set conflicts.
+- Mark serialization points for global docs and merge boundaries.
+- Produce an execution plan that AirEng can prefer directly.
+
+## Commands
+
+```bash
+python ../../scripts/airarc_mode.py --mode enter --project <project-root>
+python ../../scripts/airarc_mode.py --mode status --project <project-root>
+python ../../scripts/airarc_mode.py --mode parallel-review --project <project-root> --todo <todo-md>
+```

AirPlan/docs/spec/AirPlan-ParaV2/plugins/airarc/skills/airarc/agents/openai.yaml

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+name: airarc
+short_description: Architecture-first planning with built-in parallel review and Air Engine handoff
+default_prompt: "Use AirArc to build or refresh architecture context, then emit a post-plan parallel review and execution plan for Air Engine."