feat(delegate-task): use explicit high variant for unspecified-high category

- Update DEFAULT_CATEGORIES to use 'openai/gpt-5.4-high' directly instead of separate model + variant
- Add helper functions (isExplicitHighModel, getExplicitHighBaseModel) to preserve explicit high models during fuzzy matching
- Update category resolver to avoid collapsing explicit high models to base model + variant pair
- Update tests to verify explicit high model handling in both background and sync modes
- Update documentation examples to reflect new configuration

🤖 Generated with OhMyOpenCode assistance

docs/guide/agent-model-matching.md

@@ -190,7 +190,7 @@ See the [Orchestration System Guide](./orchestration.md) for how agents dispatch
   "categories": {
     "quick": { "model": "opencode/gpt-5-nano" },
     "unspecified-low": { "model": "anthropic/claude-sonnet-4-6" },
-    "unspecified-high": { "model": "openai/gpt-5.4", "variant": "high" },
+    "unspecified-high": { "model": "openai/gpt-5.4-high" },
     "visual-engineering": {
       "model": "google/gemini-3.1-pro",
       "variant": "high",

docs/reference/configuration.md

@@ -100,7 +100,7 @@ Here's a practical starting configuration:
     "unspecified-low": { "model": "anthropic/claude-sonnet-4-6" },
 
     // unspecified-high — complex work
-    "unspecified-high": { "model": "openai/gpt-5.4", "variant": "high" },
+    "unspecified-high": { "model": "openai/gpt-5.4-high" },
 
     // writing — docs/prose
     "writing": { "model": "google/gemini-3-flash" },

src/tools/delegate-task/constants.ts

@@ -289,7 +289,7 @@ export const DEFAULT_CATEGORIES: Record<string, CategoryConfig> = {
   artistry: { model: "google/gemini-3.1-pro", variant: "high" },
   quick: { model: "anthropic/claude-haiku-4-5" },
   "unspecified-low": { model: "anthropic/claude-sonnet-4-6" },
-  "unspecified-high": { model: "openai/gpt-5.4", variant: "high" },
+  "unspecified-high": { model: "openai/gpt-5.4-high" },
   writing: { model: "kimi-for-coding/k2p5" },
 }
 

src/tools/delegate-task/model-selection.ts

@@ -3,6 +3,14 @@ import { normalizeModel } from "../../shared/model-normalization"
 import { fuzzyMatchModel } from "../../shared/model-availability"
 import { transformModelForProvider } from "../../shared/provider-model-id-transform"
 
+function isExplicitHighModel(model: string): boolean {
+  return /(?:^|\/)[^/]+-high$/.test(model)
+}
+
+function getExplicitHighBaseModel(model: string): string | null {
+  return isExplicitHighModel(model) ? model.replace(/-high$/, "") : null
+}
+
 
 export function resolveModelForDelegateTask(input: {
   userModel?: string
@@ -17,6 +25,8 @@ export function resolveModelForDelegateTask(input: {
   }
 
   const categoryDefault = normalizeModel(input.categoryDefaultModel)
+  const explicitHighBaseModel = categoryDefault ? getExplicitHighBaseModel(categoryDefault) : null
+  const explicitHighModel = explicitHighBaseModel ? categoryDefault : undefined
   if (categoryDefault) {
     if (input.availableModels.size === 0) {
       return { model: categoryDefault }
@@ -26,6 +36,10 @@ export function resolveModelForDelegateTask(input: {
     const providerHint = parts.length >= 2 ? [parts[0]] : undefined
     const match = fuzzyMatchModel(categoryDefault, input.availableModels, providerHint)
     if (match) {
+      if (isExplicitHighModel(categoryDefault) && match !== categoryDefault) {
+        return { model: categoryDefault }
+      }
+
       return { model: match }
     }
   }
@@ -45,12 +59,20 @@ export function resolveModelForDelegateTask(input: {
           const fullModel = `${provider}/${entry.model}`
           const match = fuzzyMatchModel(fullModel, input.availableModels, [provider])
           if (match) {
+            if (explicitHighModel && entry.variant === "high" && match === explicitHighBaseModel) {
+              return { model: explicitHighModel }
+            }
+
             return { model: match, variant: entry.variant }
           }
         }
 
         const crossProviderMatch = fuzzyMatchModel(entry.model, input.availableModels)
         if (crossProviderMatch) {
+          if (explicitHighModel && entry.variant === "high" && crossProviderMatch === explicitHighBaseModel) {
+            return { model: explicitHighModel }
+          }
+
           return { model: crossProviderMatch, variant: entry.variant }
         }
       }

src/tools/delegate-task/tools.test.ts

@@ -96,6 +96,16 @@ describe("sisyphus-task", () => {
       expect(category.model).toBe("openai/gpt-5.3-codex")
       expect(category.variant).toBe("medium")
     })
+
+    test("unspecified-high category uses explicit high model", () => {
+      // given
+      const category = DEFAULT_CATEGORIES["unspecified-high"]
+
+      // when / #then
+      expect(category).toBeDefined()
+      expect(category.model).toBe("openai/gpt-5.4-high")
+      expect(category.variant).toBeUndefined()
+    })
   })
 
   describe("CATEGORY_PROMPT_APPENDS", () => {
@@ -981,7 +991,7 @@ describe("sisyphus-task", () => {
       })
     })
 
-    test("DEFAULT_CATEGORIES variant passes to background WITHOUT userCategories", async () => {
+    test("DEFAULT_CATEGORIES explicit high model passes to background WITHOUT userCategories", async () => {
       // given - NO userCategories, testing DEFAULT_CATEGORIES only
       const { createDelegateTask } = require("./tools")
       let launchInput: any
@@ -1026,7 +1036,7 @@ describe("sisyphus-task", () => {
         abort: new AbortController().signal,
       }
 
-      // when - unspecified-high has variant: "max" in DEFAULT_CATEGORIES
+      // when - unspecified-high uses the explicit high model in DEFAULT_CATEGORIES
       await tool.execute(
         {
           description: "Test unspecified-high default variant",
@@ -1038,15 +1048,14 @@ describe("sisyphus-task", () => {
         toolContext
       )
 
-      // then - variant MUST be "max" from DEFAULT_CATEGORIES
+      // then - the explicit high model should be passed without a separate variant
       expect(launchInput.model).toEqual({
         providerID: "openai",
-        modelID: "gpt-5.4",
+        modelID: "gpt-5.4-high",
-        variant: "high",
       })
     }, { timeout: 20000 })
 
-     test("DEFAULT_CATEGORIES variant passes to sync session.prompt WITHOUT userCategories", async () => {
+     test("DEFAULT_CATEGORIES explicit high model passes to sync session.prompt WITHOUT userCategories", async () => {
        // given - NO userCategories, testing DEFAULT_CATEGORIES for sync mode
        const { createDelegateTask } = require("./tools")
        let promptBody: any
@@ -1087,7 +1096,7 @@ describe("sisyphus-task", () => {
         abort: new AbortController().signal,
       }
 
-      // when - unspecified-high has variant: "max" in DEFAULT_CATEGORIES
+      // when - unspecified-high uses the explicit high model in DEFAULT_CATEGORIES
       await tool.execute(
         {
           description: "Test unspecified-high sync variant",
@@ -1099,12 +1108,12 @@ describe("sisyphus-task", () => {
         toolContext
       )
 
-      // then - variant MUST be "max" from DEFAULT_CATEGORIES (passed as separate field)
+      // then - the explicit high model should be passed without a separate variant
       expect(promptBody.model).toEqual({
         providerID: "openai",
-        modelID: "gpt-5.4",
+        modelID: "gpt-5.4-high",
       })
-      expect(promptBody.variant).toBe("high")
+      expect(promptBody.variant).toBeUndefined()
     }, { timeout: 20000 })
   })