refactor(agents): drop runtime metadata re-export

src/agents/acp-runtime-overlay.ts

@@ -5,8 +5,7 @@ import { isAcpSessionKey } from "../routing/session-key.js";
  * Leaf type for agent runtime classification. Defined here so that
  * agent-runtime-metadata.ts can import applyAcpRuntimeOverlay without
  * creating a circular dependency (agent-runtime-metadata → acp-runtime-overlay
- * → agent-runtime-metadata).  agent-runtime-metadata.ts re-exports this type
- * so all existing consumers remain unaffected.
+ * → agent-runtime-metadata).
  */
 export type AgentRuntimeMetadata = {
   id: string;

src/agents/agent-runtime-metadata.ts

@@ -4,8 +4,6 @@ import { applyAcpRuntimeOverlay, type AgentRuntimeMetadata } from "./acp-runtime
 import { resolveAgentHarnessPolicy } from "./harness/policy.js";
 import { resolveDefaultModelForAgent } from "./model-selection.js";
 
-export type { AgentRuntimeMetadata };
-
 /** Resolves the runtime id/source that should be reported for a model-backed agent session. */
 export function resolveModelAgentRuntimeMetadata(params: {
   cfg: OpenClawConfig;