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>

lib/air_runtime/modes/xdb_mode.py

@@ -0,0 +1,44 @@
+"""AirXDB mode -- GUI verification via screenshot capture."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+from air_runtime.xdb_capture import CaptureManager, CaptureResult
+from air_runtime.events import EventLog, XDB_CAPTURED
+from air_runtime.paths import event_log_path
+
+
+def capture_screenshot(
+    project_root: Path,
+    output_name: str = "screenshot.png",
+    prefer: str = "auto",
+) -> CaptureResult:
+    out_path = project_root / "AirPlan" / "state" / "airxdb" / "captures" / output_name
+    out_path.parent.mkdir(parents=True, exist_ok=True)
+    mgr = CaptureManager()
+    result = mgr.capture(out_path, prefer)
+
+    log = EventLog(event_log_path(project_root))
+    log.emit(XDB_CAPTURED, {
+        "outputName": output_name,
+        "success": result.success,
+        "method": result.method,
+        "outputPath": str(result.output_path),
+    })
+
+    return result
+
+
+def main(args) -> None:
+    project_root = Path(args.project).expanduser().resolve()
+    prefer = getattr(args, "prefer", "auto")
+    output = getattr(args, "output", None) or "screenshot.png"
+
+    result = capture_screenshot(project_root, output, prefer)
+    print("airplan_mode=xdb")
+    print(f"success={result.success}")
+    print(f"method={result.method}")
+    print(f"output={result.output_path}")
+    if result.error:
+        print(f"error={result.error}")