refactor: remove dead ultrawork model override code

Remove ultrawork-model-override hook and per-agent ultrawork model swap
config that relied on zen opencode.ai free tier (no longer functional).

Removed:
- src/hooks/ultrawork-model-override/ (hook, test, index)
- ultrawork field from AgentOverrideConfigSchema
- ultrawork-model-override from HookNameSchema
- UltraworkConfig type from model-fallback-types
- Non-max20 sonnet+ultrawork-opus codepath from model-fallback
- Claude subscription model table from installation docs
- All references in plugin-interface, create-session-hooks, schema.json
- Related test cases and updated snapshots

assets/oh-my-opencode.schema.json

@@ -80,7 +80,6 @@
           "non-interactive-env",
           "interactive-bash-session",
           "thinking-block-validator",
-          "ultrawork-model-override",
           "ralph-loop",
           "category-skill-reminder",
           "compaction-context-injector",
@@ -279,21 +278,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -467,21 +451,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -655,21 +624,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -843,21 +797,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1031,21 +970,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1219,21 +1143,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1407,21 +1316,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1595,21 +1489,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1783,21 +1662,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -1971,21 +1835,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -2159,21 +2008,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -2347,21 +2181,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -2535,21 +2354,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -2723,21 +2527,6 @@
               ],
               "additionalProperties": false
             },
-            "ultrawork": {
-              "type": "object",
-              "properties": {
-                "model": {
-                  "type": "string"
-                },
-                "variant": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "model"
-              ],
-              "additionalProperties": false
-            },
             "reasoningEffort": {
               "type": "string",
               "enum": [
@@ -3373,4 +3162,4 @@
     }
   },
   "additionalProperties": false
-}
+}

docs/guide/installation.md

@@ -68,15 +68,6 @@ Ask the user these questions to determine CLI options:
 
 **Provider Priority**: Native (anthropic/, openai/, google/) > GitHub Copilot > OpenCode Zen > Z.ai Coding Plan
 
-#### Claude Subscription Model Assignments
-
-| Subscription | Sisyphus (Daily) | Ultrawork Mode |
-| ------------ | ---------------- | -------------- |
-| **max20** | `anthropic/claude-opus-4-6` (max) | Already on Opus — no override |
-| **standard** | `anthropic/claude-sonnet-4-6` (max) | `anthropic/claude-opus-4-6` (max) |
-
-Standard Claude subscribers use Sonnet 4.6 for daily driving and automatically switch to Opus 4.6 when ultrawork mode is activated (by typing `ultrawork` or `ulw`).
-
 MUST STRONGLY WARNING, WHEN USER SAID THEY DON'T HAVE CLAUDE SUBSCRIPTION, SISYPHUS AGENT MIGHT NOT WORK IDEALLY.
 
 ### Step 1: Install OpenCode (if not installed)

src/cli/__snapshots__/model-fallback.test.ts.snap

@@ -94,11 +94,7 @@ exports[`generateModelConfig single native provider uses Claude models when only
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },
@@ -483,11 +479,7 @@ exports[`generateModelConfig all native providers uses preferred models from fal
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },
@@ -1044,11 +1036,7 @@ exports[`generateModelConfig mixed provider scenarios uses Claude + OpenCode Zen
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },
@@ -1192,11 +1180,7 @@ exports[`generateModelConfig mixed provider scenarios uses Claude + ZAI combinat
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },
@@ -1257,11 +1241,7 @@ exports[`generateModelConfig mixed provider scenarios uses Gemini + Claude combi
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },
@@ -1405,11 +1385,7 @@ exports[`generateModelConfig mixed provider scenarios uses all providers togethe
       "variant": "max",
     },
     "sisyphus": {
-      "model": "anthropic/claude-sonnet-4-6",
+      "model": "anthropic/claude-opus-4-6",
-      "ultrawork": {
-        "model": "anthropic/claude-opus-4-6",
-        "variant": "max",
-      },
       "variant": "max",
     },
   },

src/cli/config-manager.test.ts

@@ -240,52 +240,6 @@ describe("config-manager ANTIGRAVITY_PROVIDER_CONFIG", () => {
 })
 
 describe("generateOmoConfig - model fallback system", () => {
-  test("generates sonnet model with ultrawork opus for Claude standard subscription", () => {
-    // #given user has Claude standard subscription (not max20)
-    const config: InstallConfig = {
-      hasClaude: true,
-      isMax20: false,
-      hasOpenAI: false,
-      hasGemini: false,
-      hasCopilot: false,
-      hasOpencodeZen: false,
-      hasZaiCodingPlan: false,
-      hasKimiForCoding: false,
-    }
-
-    // #when generating config
-    const result = generateOmoConfig(config)
-
-    // #then Sisyphus uses sonnet for daily driving with ultrawork opus override
-    const sisyphus = (result.agents as Record<string, { model: string; variant?: string; ultrawork?: { model: string; variant?: string } }>).sisyphus
-    expect(result.$schema).toBe("https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json")
-    expect(sisyphus.model).toBe("anthropic/claude-sonnet-4-6")
-    expect(sisyphus.variant).toBe("max")
-    expect(sisyphus.ultrawork).toEqual({ model: "anthropic/claude-opus-4-6", variant: "max" })
-  })
-
-  test("generates native opus models without ultrawork when Claude max20 subscription", () => {
-    // #given user has Claude max20 subscription
-    const config: InstallConfig = {
-      hasClaude: true,
-      isMax20: true,
-      hasOpenAI: false,
-      hasGemini: false,
-      hasCopilot: false,
-      hasOpencodeZen: false,
-      hasZaiCodingPlan: false,
-      hasKimiForCoding: false,
-    }
-
-    // #when generating config
-    const result = generateOmoConfig(config)
-
-    // #then Sisyphus uses opus directly, no ultrawork override needed
-    const sisyphus = (result.agents as Record<string, { model: string; ultrawork?: unknown }>).sisyphus
-    expect(sisyphus.model).toBe("anthropic/claude-opus-4-6")
-    expect(sisyphus.ultrawork).toBeUndefined()
-  })
-
   test("uses github-copilot sonnet fallback when only copilot available", () => {
     // #given user has only copilot (no max plan)
     const config: InstallConfig = {

src/cli/model-fallback-types.ts

@@ -11,15 +11,9 @@ export interface ProviderAvailability {
 	isMaxPlan: boolean
 }
 
-export interface UltraworkConfig {
-	model: string
-	variant?: string
-}
-
 export interface AgentConfig {
 	model: string
 	variant?: string
-	ultrawork?: UltraworkConfig
 }
 
 export interface CategoryConfig {

src/cli/model-fallback.ts

@@ -76,15 +76,6 @@ export function generateModelConfig(config: InstallConfig): GeneratedOmoConfig {
         continue
       }
 
-      if (avail.native.claude && !avail.isMaxPlan) {
-        agents[role] = {
-          model: "anthropic/claude-sonnet-4-6",
-          variant: "max",
-          ultrawork: { model: "anthropic/claude-opus-4-6", variant: "max" },
-        }
-        continue
-      }
-
       const resolved = resolveModelFromChain(fallbackChain, avail)
       if (resolved) {
         const variant = resolved.variant ?? req.variant

src/config/schema/agent-overrides.ts

@@ -32,11 +32,6 @@ export const AgentOverrideConfigSchema = z.object({
       budgetTokens: z.number().optional(),
     })
     .optional(),
-  /** Ultrawork model override configuration. */
-  ultrawork: z.object({
-    model: z.string(),
-    variant: z.string().optional(),
-  }).optional(),
   /** Reasoning effort level (OpenAI). Overrides category and default settings. */
   reasoningEffort: z.enum(["low", "medium", "high", "xhigh"]).optional(),
   /** Text verbosity level. */

src/config/schema/hooks.ts

@@ -25,7 +25,6 @@ export const HookNameSchema = z.enum([
   "interactive-bash-session",
 
   "thinking-block-validator",
-  "ultrawork-model-override",
   "ralph-loop",
   "category-skill-reminder",
 

src/hooks/index.ts

@@ -47,4 +47,3 @@ export { createTasksTodowriteDisablerHook } from "./tasks-todowrite-disabler";
 export { createWriteExistingFileGuardHook } from "./write-existing-file-guard";
 export { createHashlineReadEnhancerHook } from "./hashline-read-enhancer";
 
-export { createUltraworkModelOverrideHook } from "./ultrawork-model-override";

src/hooks/ultrawork-model-override/hook.test.ts

@@ -1,217 +0,0 @@
-import { describe, expect, it } from "vitest"
-import { createUltraworkModelOverrideHook } from "./hook"
-
-interface ChatParamsInput {
-  agent: string
-  message: {
-    variant: string
-    model?: { providerID?: string; modelID?: string }
-  }
-  sessionID?: string
-}
-
-interface ChatParamsOutput {
-  // Not used by this hook
-}
-
-function createMockParams(overrides: {
-  agent?: string
-  variant?: string
-  model?: { providerID?: string; modelID?: string }
-  sessionID?: string
-}): { input: ChatParamsInput; output: ChatParamsOutput } {
-  const agent = overrides.agent ?? "sisyphus"
-  const variant = overrides.variant ?? "max"
-  const model = overrides.model
-  const sessionID = overrides.sessionID
-
-  return {
-    input: {
-      agent,
-      message: { variant, model },
-      sessionID,
-    },
-    output: {},
-  }
-}
-
-describe("createUltraworkModelOverrideHook", () => {
-  describe("model swap works", () => {
-    it("variant max, ultrawork config exists → model swapped", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toEqual({
-        providerID: "openai",
-        modelID: "gpt-5.2",
-      })
-    })
-  })
-
-  describe("no-op on non-max variant", () => {
-    it("variant high → model unchanged", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({ variant: "high" })
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toBeUndefined()
-    })
-  })
-
-  describe("no-op without config", () => {
-    it("agent has no ultrawork config → model unchanged", async () => {
-      // given
-      const agents = {
-        hephaestus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toBeUndefined()
-    })
-  })
-
-  describe("empty ultrawork config", () => {
-    it("ultrawork: {} → no-op (model required)", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: undefined,
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toBeUndefined()
-    })
-  })
-
-  describe("model string parsing", () => {
-    it("openai/gpt-5.2 → { providerID: openai, modelID: gpt-5.2 }", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toEqual({
-        providerID: "openai",
-        modelID: "gpt-5.2",
-      })
-    })
-  })
-
-  describe("nested slashes", () => {
-    it("google-vertex-anthropic/claude-opus-4-6 → { providerID: google-vertex-anthropic, modelID: claude-opus-4-6 } (first / only)", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "google-vertex-anthropic/claude-opus-4-6",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toEqual({
-        providerID: "google-vertex-anthropic",
-        modelID: "claude-opus-4-6",
-      })
-    })
-  })
-
-  describe("variant override", () => {
-    it("ultrawork.variant exists → message.variant updated", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-            variant: "high",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({})
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.variant).toBe("high")
-    })
-  })
-
-  describe("agent name normalization", () => {
-    it("Sisyphus (Ultraworker) → sisyphus config key lookup", async () => {
-      // given
-      const agents = {
-        sisyphus: {
-          ultrawork: {
-            model: "openai/gpt-5.2",
-          },
-        },
-      }
-      const hook = createUltraworkModelOverrideHook({ agents })
-      const { input, output } = createMockParams({ agent: "Sisyphus (Ultraworker)" })
-
-      // when
-      await hook["chat.params"](input, output)
-
-      // then
-      expect(input.message.model).toEqual({
-        providerID: "openai",
-        modelID: "gpt-5.2",
-      })
-    })
-  })
-})

src/hooks/ultrawork-model-override/hook.ts

@@ -1,83 +0,0 @@
-import type { AgentOverrides } from "../../config"
-import { log } from "../../shared"
-import { getAgentConfigKey } from "../../shared/agent-display-names"
-
-function isRecord(value: unknown): value is Record<string, unknown> {
-  return typeof value === "object" && value !== null
-}
-
-function getUltraworkConfig(agents: AgentOverrides | undefined, configKey: string) {
-  if (!agents) return undefined
-
-  for (const [agentKey, override] of Object.entries(agents)) {
-    if (getAgentConfigKey(agentKey) === configKey) {
-      return override?.ultrawork
-    }
-  }
-
-  return undefined
-}
-
-export function createUltraworkModelOverrideHook(args: { agents?: AgentOverrides }) {
-  let didLogSpikeInput = false
-
-  return {
-    "chat.params": async (input: unknown, output: unknown): Promise<void> => {
-      if (!didLogSpikeInput) {
-        didLogSpikeInput = true
-
-        const inputRecord = isRecord(input) ? input : null
-        const messageRecord = isRecord(inputRecord?.message) ? inputRecord.message : null
-
-        log("ultrawork-model-override spike: raw chat.params input", {
-          inputType: typeof input,
-          outputType: typeof output,
-          hasMessage: messageRecord !== null,
-          messageKeys: messageRecord ? Object.keys(messageRecord) : [],
-          hasMessageModel: messageRecord ? "model" in messageRecord : false,
-          messageModelType: messageRecord ? typeof messageRecord.model : "undefined",
-        })
-      }
-
-      if (!isRecord(input)) return
-
-      const message = input.message
-      if (!isRecord(message)) return
-      if (message.variant !== "max") return
-
-      const agentName = input.agent
-      if (typeof agentName !== "string") return
-
-      const configKey = getAgentConfigKey(agentName)
-      const ultrawork = getUltraworkConfig(args.agents, configKey)
-      if (!ultrawork?.model) return
-
-      const separatorIndex = ultrawork.model.indexOf("/")
-      const providerID = separatorIndex === -1 ? ultrawork.model : ultrawork.model.slice(0, separatorIndex)
-      const modelID = separatorIndex === -1 ? "" : ultrawork.model.slice(separatorIndex + 1)
-
-      const previousModel = isRecord(message.model)
-        ? {
-            providerID:
-              typeof message.model.providerID === "string" ? message.model.providerID : undefined,
-            modelID: typeof message.model.modelID === "string" ? message.model.modelID : undefined,
-          }
-        : undefined
-
-      message.model = { providerID, modelID }
-
-      if (ultrawork.variant !== undefined) {
-        message.variant = ultrawork.variant
-      }
-
-      log("ultrawork-model-override: swapped model", {
-        sessionID: typeof input.sessionID === "string" ? input.sessionID : undefined,
-        agent: agentName,
-        configKey,
-        from: previousModel,
-        to: message.model,
-        variant: message.variant,
-      })
-    },
-  }
-}

src/hooks/ultrawork-model-override/index.ts

@@ -1 +0,0 @@
-export { createUltraworkModelOverrideHook } from "./hook"

src/plugin-interface.ts

@@ -31,7 +31,6 @@ export function createPluginInterface(args: {
     tool: tools,
 
     "chat.params": async (input, output) => {
-      await hooks.ultraworkModelOverride?.["chat.params"]?.(input, output)
       const handler = createChatParamsHandler({ anthropicEffort: hooks.anthropicEffort })
       await handler(input, output)
     },

src/plugin/hooks/create-session-hooks.ts

@@ -25,7 +25,6 @@ import {
   createPreemptiveCompactionHook,
 } from "../../hooks"
 import { createAnthropicEffortHook } from "../../hooks/anthropic-effort"
-import { createUltraworkModelOverrideHook } from "../../hooks/ultrawork-model-override"
 import {
   detectExternalNotificationPlugin,
   getNotificationConflictWarning,
@@ -56,7 +55,6 @@ export type SessionHooks = {
   questionLabelTruncator: ReturnType<typeof createQuestionLabelTruncatorHook>
   taskResumeInfo: ReturnType<typeof createTaskResumeInfoHook>
   anthropicEffort: ReturnType<typeof createAnthropicEffortHook> | null
-  ultraworkModelOverride: ReturnType<typeof createUltraworkModelOverrideHook> | null
 }
 
 export function createSessionHooks(args: {
@@ -171,10 +169,6 @@ export function createSessionHooks(args: {
     ? safeHook("anthropic-effort", () => createAnthropicEffortHook())
     : null
 
-  const ultraworkModelOverride = isHookEnabled("ultrawork-model-override")
-    ? safeHook("ultrawork-model-override", () => createUltraworkModelOverrideHook({ agents: pluginConfig.agents }))
-    : null
-
   return {
     contextWindowMonitor,
     preemptiveCompaction,
@@ -197,6 +191,5 @@ export function createSessionHooks(args: {
     questionLabelTruncator,
     taskResumeInfo,
     anthropicEffort,
-    ultraworkModelOverride,
   }
 }