feat(agents): enable call_omo_agent for Sisyphus-Junior subagents

Allow Sisyphus-Junior (category-based tasks) to spawn explore/librarian
agents via call_omo_agent for research capabilities.

Changes:
- Remove call_omo_agent from BLOCKED_TOOLS in sisyphus-junior.ts
- Update prompt to show ALLOWED status for call_omo_agent
- Remove global call_omo_agent blocking in config-handler.ts
- Keep blocking for orchestrator-sisyphus (use sisyphus_task instead)
- Keep runtime recursion prevention in index.ts for explore/librarian

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/agents/sisyphus-junior.test.ts

@@ -138,8 +138,8 @@ describe("createSisyphusJuniorAgentWithOverrides", () => {
     })
   })
 
-  describe("tool safety (blocked tools enforcement)", () => {
-    test("blocked tools remain blocked even if override tries to enable them via tools format", () => {
+  describe("tool safety (task/sisyphus_task blocked, call_omo_agent allowed)", () => {
+    test("task and sisyphus_task remain blocked, call_omo_agent is allowed via tools format", () => {
       // #given
       const override = {
         tools: {
@@ -159,17 +159,19 @@ describe("createSisyphusJuniorAgentWithOverrides", () => {
       if (tools) {
         expect(tools.task).toBe(false)
         expect(tools.sisyphus_task).toBe(false)
-        expect(tools.call_omo_agent).toBe(false)
+        // call_omo_agent is NOW ALLOWED for subagents to spawn explore/librarian
+        expect(tools.call_omo_agent).toBe(true)
         expect(tools.read).toBe(true)
       }
       if (permission) {
         expect(permission.task).toBe("deny")
         expect(permission.sisyphus_task).toBe("deny")
-        expect(permission.call_omo_agent).toBe("deny")
+        // call_omo_agent is NOW ALLOWED for subagents to spawn explore/librarian
+        expect(permission.call_omo_agent).toBe("allow")
       }
     })
 
-    test("blocked tools remain blocked when using permission format override", () => {
+    test("task and sisyphus_task remain blocked when using permission format override", () => {
       // #given
       const override = {
         permission: {
@@ -183,18 +185,18 @@ describe("createSisyphusJuniorAgentWithOverrides", () => {
       // #when
       const result = createSisyphusJuniorAgentWithOverrides(override as Parameters<typeof createSisyphusJuniorAgentWithOverrides>[0])
 
-      // #then - blocked tools should be denied regardless
+      // #then - task/sisyphus_task blocked, but call_omo_agent allowed for explore/librarian spawning
       const tools = result.tools as Record<string, boolean> | undefined
       const permission = result.permission as Record<string, string> | undefined
       if (tools) {
         expect(tools.task).toBe(false)
         expect(tools.sisyphus_task).toBe(false)
-        expect(tools.call_omo_agent).toBe(false)
+        expect(tools.call_omo_agent).toBe(true)
       }
       if (permission) {
         expect(permission.task).toBe("deny")
         expect(permission.sisyphus_task).toBe("deny")
-        expect(permission.call_omo_agent).toBe("deny")
+        expect(permission.call_omo_agent).toBe("allow")
       }
     })
   })

src/agents/sisyphus-junior.ts

@@ -15,11 +15,10 @@ Execute tasks directly. NEVER delegate or spawn other agents.
 <Critical_Constraints>
 BLOCKED ACTIONS (will fail if attempted):
 - task tool: BLOCKED
-- sisyphus_task tool: BLOCKED  
-- sisyphus_task tool: BLOCKED (already blocked above, but explicit)
-- call_omo_agent tool: BLOCKED
+- sisyphus_task tool: BLOCKED
 
-You work ALONE. No delegation. No background tasks. Execute directly.
+ALLOWED: call_omo_agent - You CAN spawn explore/librarian agents for research.
+You work ALONE for implementation. No delegation of implementation tasks.
 </Critical_Constraints>
 
 <Work_Context>
@@ -76,7 +75,8 @@ function buildSisyphusJuniorPrompt(promptAppend?: string): string {
 }
 
 // Core tools that Sisyphus-Junior must NEVER have access to
-const BLOCKED_TOOLS = ["task", "sisyphus_task", "call_omo_agent"]
+// Note: call_omo_agent is ALLOWED so subagents can spawn explore/librarian
+const BLOCKED_TOOLS = ["task", "sisyphus_task"]
 
 export const SISYPHUS_JUNIOR_DEFAULTS = {
   model: "anthropic/claude-sonnet-4-5",
@@ -106,6 +106,7 @@ export function createSisyphusJuniorAgentWithOverrides(
     for (const tool of BLOCKED_TOOLS) {
       merged[tool] = "deny"
     }
+    merged.call_omo_agent = "allow"
     toolsConfig = { permission: { ...merged, ...basePermission } }
   } else {
     const userTools = override?.tools ?? {}
@@ -114,6 +115,7 @@ export function createSisyphusJuniorAgentWithOverrides(
     for (const tool of BLOCKED_TOOLS) {
       merged[tool] = false
     }
+    merged.call_omo_agent = true
     toolsConfig = { tools: { ...merged, ...baseTools } }
   }