feat: add sessions_spawn sub-agent tool

src/config/types.ts

@@ -806,6 +806,16 @@ export type ClawdbotConfig = {
     };
     /** Max concurrent agent runs across all conversations. Default: 1 (sequential). */
     maxConcurrent?: number;
+    /** Sub-agent defaults (spawned via sessions_spawn). */
+    subagents?: {
+      /** Max concurrent sub-agent runs (global lane: "subagent"). Default: 1. */
+      maxConcurrent?: number;
+      /** Tool allow/deny policy for sub-agent sessions (deny wins). */
+      tools?: {
+        allow?: string[];
+        deny?: string[];
+      };
+    };
     /** Bash tool defaults. */
     bash?: {
       /** Default time (ms) before a bash command auto-backgrounds. */

src/config/zod-schema.ts

@@ -465,6 +465,17 @@ export const ClawdbotSchema = z.object({
       typingIntervalSeconds: z.number().int().positive().optional(),
       heartbeat: HeartbeatSchema,
       maxConcurrent: z.number().int().positive().optional(),
+      subagents: z
+        .object({
+          maxConcurrent: z.number().int().positive().optional(),
+          tools: z
+            .object({
+              allow: z.array(z.string()).optional(),
+              deny: z.array(z.string()).optional(),
+            })
+            .optional(),
+        })
+        .optional(),
       bash: z
         .object({
           backgroundMs: z.number().int().positive().optional(),