From f6fc30ada51bf13aa5c98377e20a28b46b2089e7 Mon Sep 17 00:00:00 2001
From: YeonGyu-Kim <code.yeon.gyu@gmail.com>
Date: Sun, 8 Feb 2026 13:09:58 +0900
Subject: [PATCH] fix: add default value for load_skills parameter in task tool
 (#1493)

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
---
 src/tools/delegate-task/tools.test.ts | 89 +++++++++++++++------------
 src/tools/delegate-task/tools.ts      |  4 +-
 2 files changed, 53 insertions(+), 40 deletions(-)

diff --git a/src/tools/delegate-task/tools.test.ts b/src/tools/delegate-task/tools.test.ts
index 63a42297f..6b08948e6 100644
--- a/src/tools/delegate-task/tools.test.ts
+++ b/src/tools/delegate-task/tools.test.ts
@@ -849,46 +849,59 @@ describe("sisyphus-task", () => {
   })
 
   describe("skills parameter", () => {
-    test("skills parameter is required - throws error when not provided", async () => {
+    test("load_skills defaults to empty array when not provided (undefined)", async () => {
       // given
       const { createDelegateTask } = require("./tools")
-      
-       const mockManager = { launch: async () => ({}) }
-       const mockClient = {
-         app: { agents: async () => ({ data: [] }) },
-         config: { get: async () => ({ data: { model: SYSTEM_DEFAULT_MODEL } }) },
-         session: {
-           create: async () => ({ data: { id: "test-session" } }),
-           prompt: async () => ({ data: {} }),
-           promptAsync: async () => ({ data: {} }),
-           messages: async () => ({ data: [] }),
-         },
-       }
-       
-       const tool = createDelegateTask({
-         manager: mockManager,
-         client: mockClient,
-       })
-       
-       const toolContext = {
-         sessionID: "parent-session",
-         messageID: "parent-message",
-         agent: "sisyphus",
-         abort: new AbortController().signal,
-       }
-       
-       // when - skills not provided (undefined)
-       // then - should throw error about missing skills
-       await expect(tool.execute(
-         {
-           description: "Test task",
-           prompt: "Do something",
-           category: "ultrabrain",
-           run_in_background: false,
-         },
-         toolContext
-       )).rejects.toThrow("IT IS HIGHLY RECOMMENDED")
-    })
+      let promptBody: any
+
+      const mockManager = { launch: async () => ({}) }
+
+      const promptMock = async (input: any) => {
+        promptBody = input.body
+        return { data: {} }
+      }
+
+      const mockClient = {
+        app: { agents: async () => ({ data: [] }) },
+        config: { get: async () => ({ data: { model: SYSTEM_DEFAULT_MODEL } }) },
+        session: {
+          get: async () => ({ data: { directory: "/project" } }),
+          create: async () => ({ data: { id: "ses_default_skills" } }),
+          prompt: promptMock,
+          promptAsync: promptMock,
+          messages: async () => ({
+            data: [{ info: { role: "assistant" }, parts: [{ type: "text", text: "Done" }] }]
+          }),
+          status: async () => ({ data: {} }),
+        },
+      }
+
+      const tool = createDelegateTask({
+        manager: mockManager,
+        client: mockClient,
+      })
+
+      const toolContext = {
+        sessionID: "parent-session",
+        messageID: "parent-message",
+        agent: "sisyphus",
+        abort: new AbortController().signal,
+      }
+
+      // when - load_skills not provided (undefined) - should default to []
+      await tool.execute(
+        {
+          description: "Test task",
+          prompt: "Do something",
+          category: "ultrabrain",
+          run_in_background: false,
+        },
+        toolContext
+      )
+
+      // then - should proceed without error, prompt should be called
+      expect(promptBody).toBeDefined()
+    }, { timeout: 20000 })
 
      test("null skills throws error", async () => {
        // given
diff --git a/src/tools/delegate-task/tools.ts b/src/tools/delegate-task/tools.ts
index 1db72408c..582eb11fd 100644
--- a/src/tools/delegate-task/tools.ts
+++ b/src/tools/delegate-task/tools.ts
@@ -74,7 +74,7 @@ Prompts MUST be in English.`
   return tool({
     description,
     args: {
-      load_skills: tool.schema.array(tool.schema.string()).describe("Skill names to inject. REQUIRED - pass [] if no skills needed, but IT IS HIGHLY RECOMMENDED to pass proper skills like [\"playwright\"], [\"git-master\"] for best results."),
+      load_skills: tool.schema.array(tool.schema.string()).default([]).describe("Skill names to inject. Pass [] if no skills needed, but IT IS HIGHLY RECOMMENDED to pass proper skills like [\"playwright\"], [\"git-master\"] for best results."),
       description: tool.schema.string().describe("Short task description (3-5 words)"),
       prompt: tool.schema.string().describe("Full detailed prompt for the agent"),
       run_in_background: tool.schema.boolean().describe("true=async (returns task_id), false=sync (waits). Default: false"),
@@ -97,7 +97,7 @@ Prompts MUST be in English.`
         throw new Error(`Invalid arguments: 'run_in_background' parameter is REQUIRED. Use run_in_background=false for task delegation, run_in_background=true only for parallel exploration.`)
       }
       if (args.load_skills === undefined) {
-        throw new Error(`Invalid arguments: 'load_skills' parameter is REQUIRED. Pass [] if no skills needed, but IT IS HIGHLY RECOMMENDED to pass proper skills like ["playwright"], ["git-master"] for best results.`)
+        args.load_skills = []
       }
       if (args.load_skills === null) {
         throw new Error(`Invalid arguments: load_skills=null is not allowed. Pass [] if no skills needed, but IT IS HIGHLY RECOMMENDED to pass proper skills.`)