fix(agent): preserve runtime request context

OpenCode tools run in a child service, so they cannot read the Agent process-local session map. Hydrate a sanitized context through the authenticated internal bridge and centralize backend project headers to prevent context loss across both boundaries.

.opencode/tools/skill_manager.ts

@@ -2,16 +2,18 @@ import { tool } from "@opencode-ai/plugin";
 
 import { SkillStore } from "../../src/skills/store.js";
 import {
-  getRuntimeSessionContext,
-  type RuntimeSessionContext,
-} from "../../src/runtime/sessionContext.js";
+  readBridgedRuntimeSessionContext,
+} from "../../src/runtime/internalSessionContextBridge.js";
+import { type RuntimeSessionContext } from "../../src/runtime/sessionContext.js";
 
 type ToolContextReader = {
-  read(sessionId: string): RuntimeSessionContext | null;
+  read(
+    sessionId: string,
+  ): RuntimeSessionContext | null | Promise<RuntimeSessionContext | null>;
 };
 
 const runtimeContextReader: ToolContextReader = {
-  read: getRuntimeSessionContext,
+  read: readBridgedRuntimeSessionContext,
 };
 
 export const createSkillManagerTool = (
@@ -69,7 +71,7 @@ export const createSkillManagerTool = (
     },
     async execute(args, context) {
       await initializePromise;
-      const sessionContext = toolContextStore.read(context.sessionID);
+      const sessionContext = await toolContextStore.read(context.sessionID);
       if (!sessionContext) {
         throw new Error(`session context not found for ${context.sessionID}`);
       }