fix: render registry workspaces for harness

backend/src/routes/sessions.ts

@@ -77,6 +77,12 @@ export function sessionRoutes(
     return typeof runner.withPrincipal === "function" ? runner.withPrincipal(principal) : runner;
   };
 
+  const optionsWithRuntimeConfig = (runner: any, workspaceConfigPath: string | undefined, options: any) => (
+    workspaceConfigPath && typeof runner.acquireWorkspaceRuntime === "function"
+      ? { ...options, runtimeConfig: runner.acquireWorkspaceRuntime(workspaceConfigPath) }
+      : options
+  );
+
   const maintenanceReply = (reply: any) => reply.code(503).send({
     code: "maintenance",
     error: "Session admission is temporarily paused for maintenance. Try again shortly.",
@@ -413,9 +419,11 @@ export function sessionRoutes(
         principal,
         question: b.question,
       };
+      let runtimeOptions = options;
       let rt: ReturnType<PiProcessManager["createFor"]> | undefined;
       try {
-        rt = d.mgr.createFor(id, options);
+        runtimeOptions = optionsWithRuntimeConfig(runner, workspaceConfigPath, options);
+        rt = d.mgr.createFor(id, runtimeOptions);
         bindRuntime(id, rt, runner, workspaceConfigPath);
       } catch (error) {
         if (rt) d.mgr.teardownIfCurrent(id, rt);
@@ -430,9 +438,9 @@ export function sessionRoutes(
       }
       info(id, "Session created");
       bootstrap(
-        id, rt, runner, workspaceConfigPath, d.mgr.configure(rt, options),
+        id, rt, runner, workspaceConfigPath, d.mgr.configure(rt, runtimeOptions),
         runner.searchPack(b.question, id, workspaceConfigPath),
-        () => d.mgr.start(id, rt, options),
+        () => d.mgr.start(id, rt, runtimeOptions),
       );
       return { id };
     } finally {
@@ -560,6 +568,7 @@ export function sessionRoutes(
         principal,
         mode: "resume" as const,
       };
+      let runtimeOptions = options;
 
       // Reopening is validation, not the transport commit point. Keep the old hub intact if
       // persistence cannot be reopened.
@@ -589,7 +598,8 @@ export function sessionRoutes(
           if (boundRuntimes.get(id) === current) boundRuntimes.delete(id);
           d.mgr.teardownIfCurrent(id, current);
         }
-        rt = d.mgr.createFor(id, options);
+        runtimeOptions = optionsWithRuntimeConfig(runner, workspaceConfigPath, options);
+        rt = d.mgr.createFor(id, runtimeOptions);
         bindRuntime(id, rt, runner, workspaceConfigPath);
       } catch {
         // A created-but-unbound runtime is not usable. The old hub remains attached because
@@ -605,7 +615,11 @@ export function sessionRoutes(
       // immediately before the first event produced by the new Resume.
       d.hub.clear(id);
       info(id, "Resuming session");
-      bootstrap(id, rt, runner, workspaceConfigPath, d.mgr.configure(rt, options), null, () => d.mgr.start(id, rt, options));
+      bootstrap(
+        id, rt, runner, workspaceConfigPath,
+        d.mgr.configure(rt, runtimeOptions), null,
+        () => d.mgr.start(id, rt, runtimeOptions),
+      );
       return reply.code(200).send({ id, alreadyActive: false });
     });
   });