fix(delegate-task): make plan agent categories/skills dynamic

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

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

src/tools/delegate-task/tools.ts

@@ -3,6 +3,10 @@ import type { DelegateTaskArgs, ToolContextWithMetadata, DelegateTaskToolOptions
 import { DEFAULT_CATEGORIES, CATEGORY_DESCRIPTIONS } from "./constants"
 import { log } from "../../shared"
 import { buildSystemContent } from "./prompt-builder"
+import type {
+  AvailableCategory,
+  AvailableSkill,
+} from "../../agents/dynamic-agent-prompt-builder"
 import {
   resolveSkillContent,
   resolveParentContext,
@@ -26,6 +30,20 @@ export function createDelegateTask(options: DelegateTaskToolOptions): ToolDefini
   const categoryNames = Object.keys(allCategories)
   const categoryExamples = categoryNames.map(k => `'${k}'`).join(", ")
 
+  const availableCategories: AvailableCategory[] = options.availableCategories
+    ?? Object.entries(allCategories).map(([name, categoryConfig]) => {
+      const userDesc = userCategories?.[name]?.description
+      const builtinDesc = CATEGORY_DESCRIPTIONS[name]
+      const description = userDesc || builtinDesc || "General tasks"
+      return {
+        name,
+        description,
+        model: categoryConfig.model,
+      }
+    })
+
+  const availableSkills: AvailableSkill[] = options.availableSkills ?? []
+
   const categoryList = categoryNames.map(name => {
     const userDesc = userCategories?.[name]?.description
     const builtinDesc = CATEGORY_DESCRIPTIONS[name]
@@ -150,7 +168,13 @@ Prompts MUST be in English.`
         })
 
         if (isUnstableAgent && isRunInBackgroundExplicitlyFalse) {
-          const systemContent = buildSystemContent({ skillContent, categoryPromptAppend, agentName: agentToUse })
+          const systemContent = buildSystemContent({
+            skillContent,
+            categoryPromptAppend,
+            agentName: agentToUse,
+            availableCategories,
+            availableSkills,
+          })
           return executeUnstableAgentTask(args, ctx, options, parentContext, agentToUse, categoryModel, systemContent, actualModel)
         }
       } else {
@@ -162,7 +186,13 @@ Prompts MUST be in English.`
         categoryModel = resolution.categoryModel
       }
 
-      const systemContent = buildSystemContent({ skillContent, categoryPromptAppend, agentName: agentToUse })
+      const systemContent = buildSystemContent({
+        skillContent,
+        categoryPromptAppend,
+        agentName: agentToUse,
+        availableCategories,
+        availableSkills,
+      })
 
       if (runInBackground) {
         return executeBackgroundTask(args, ctx, options, parentContext, agentToUse, categoryModel, systemContent)