feat: wire multi-agent config and routing

Co-authored-by: Mark Pors <1078320+pors@users.noreply.github.com>

src/cron/isolated-agent.test.ts

@@ -63,9 +63,11 @@ function makeCfg(
   overrides: Partial<ClawdbotConfig> = {},
 ): ClawdbotConfig {
   const base: ClawdbotConfig = {
-    agent: {
-      model: "anthropic/claude-opus-4-5",
-      workspace: path.join(home, "clawd"),
+    agents: {
+      defaults: {
+        model: "anthropic/claude-opus-4-5",
+        workspace: path.join(home, "clawd"),
+      },
     },
     session: { store: storePath, mainKey: "main" },
   } as ClawdbotConfig;
@@ -738,7 +740,13 @@ describe("runCronIsolatedAgentTurn", () => {
       });
 
       const cfg = makeCfg(home, storePath);
-      cfg.agent = { ...cfg.agent, heartbeat: { ackMaxChars: 0 } };
+      cfg.agents = {
+        ...cfg.agents,
+        defaults: {
+          ...cfg.agents?.defaults,
+          heartbeat: { ackMaxChars: 0 },
+        },
+      };
 
       const res = await runCronIsolatedAgentTurn({
         cfg,

src/cron/isolated-agent.ts

@@ -269,12 +269,11 @@ export async function runCronIsolatedAgentTurn(params: {
   sessionKey: string;
   lane?: string;
 }): Promise<RunCronAgentTurnResult> {
-  const agentCfg = params.cfg.agent;
-  const workspaceDirRaw =
-    params.cfg.agent?.workspace ?? DEFAULT_AGENT_WORKSPACE_DIR;
+  const agentCfg = params.cfg.agents?.defaults;
+  const workspaceDirRaw = agentCfg?.workspace ?? DEFAULT_AGENT_WORKSPACE_DIR;
   const workspace = await ensureAgentWorkspace({
     dir: workspaceDirRaw,
-    ensureBootstrapFiles: !params.cfg.agent?.skipBootstrap,
+    ensureBootstrapFiles: !agentCfg?.skipBootstrap,
   });
   const workspaceDir = workspace.dir;
 
@@ -521,7 +520,8 @@ export async function runCronIsolatedAgentTurn(params: {
   // This allows cron jobs to silently ack when nothing to report but still deliver
   // actual content when there is something to say.
   const ackMaxChars =
-    params.cfg.agent?.heartbeat?.ackMaxChars ?? DEFAULT_HEARTBEAT_ACK_MAX_CHARS;
+    params.cfg.agents?.defaults?.heartbeat?.ackMaxChars ??
+    DEFAULT_HEARTBEAT_ACK_MAX_CHARS;
   const skipHeartbeatDelivery =
     delivery && isHeartbeatOnlyResponse(payloads, Math.max(0, ackMaxChars));