fix: repair opencode config and project metadata

skills/continuous-learning-v2/scripts/detect-project.sh

@@ -142,6 +142,7 @@ _clv2_update_project_registry() {
   local pname="$2"
   local proot="$3"
   local premote="$4"
+  local pdir="$_CLV2_PROJECT_DIR"
 
   mkdir -p "$(dirname "$_CLV2_REGISTRY_FILE")"
 
@@ -155,27 +156,55 @@ _clv2_update_project_registry() {
   _CLV2_REG_PNAME="$pname" \
   _CLV2_REG_PROOT="$proot" \
   _CLV2_REG_PREMOTE="$premote" \
+  _CLV2_REG_PDIR="$pdir" \
   _CLV2_REG_FILE="$_CLV2_REGISTRY_FILE" \
   "$_CLV2_PYTHON_CMD" -c '
-import json, os
+import json, os, tempfile
 from datetime import datetime, timezone
 
 registry_path = os.environ["_CLV2_REG_FILE"]
+project_dir = os.environ["_CLV2_REG_PDIR"]
+project_file = os.path.join(project_dir, "project.json")
+
+os.makedirs(project_dir, exist_ok=True)
+
+def atomic_write_json(path, payload):
+    fd, tmp_path = tempfile.mkstemp(
+        prefix=f".{os.path.basename(path)}.tmp.",
+        dir=os.path.dirname(path),
+        text=True,
+    )
+    try:
+        with os.fdopen(fd, "w") as f:
+            json.dump(payload, f, indent=2)
+            f.write("\n")
+        os.replace(tmp_path, path)
+    finally:
+        if os.path.exists(tmp_path):
+            os.unlink(tmp_path)
+
 try:
     with open(registry_path) as f:
         registry = json.load(f)
 except (FileNotFoundError, json.JSONDecodeError):
     registry = {}
 
-registry[os.environ["_CLV2_REG_PID"]] = {
+now = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
+entry = registry.get(os.environ["_CLV2_REG_PID"], {})
+
+metadata = {
+    "id": os.environ["_CLV2_REG_PID"],
     "name": os.environ["_CLV2_REG_PNAME"],
     "root": os.environ["_CLV2_REG_PROOT"],
     "remote": os.environ["_CLV2_REG_PREMOTE"],
-    "last_seen": datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
+    "created_at": entry.get("created_at", now),
+    "last_seen": now,
 }
 
-with open(registry_path, "w") as f:
-    json.dump(registry, f, indent=2)
+registry[os.environ["_CLV2_REG_PID"]] = metadata
+
+atomic_write_json(project_file, metadata)
+atomic_write_json(registry_path, registry)
 ' 2>/dev/null || true
 }