diff --git a/src/config/schema.ts b/src/config/schema.ts
index 5692b65..40fb348 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -39,6 +39,7 @@ export const HookNameSchema = z.enum([
   "rules-injector",
   "background-notification",
   "auto-update-checker",
+  "ultrawork-mode",
 ])
 
 export const AgentOverrideConfigSchema = z.object({
diff --git a/src/hooks/index.ts b/src/hooks/index.ts
index be1fcef..12666d7 100644
--- a/src/hooks/index.ts
+++ b/src/hooks/index.ts
@@ -13,3 +13,4 @@ export { createClaudeCodeHooksHook } from "./claude-code-hooks";
 export { createRulesInjectorHook } from "./rules-injector";
 export { createBackgroundNotificationHook } from "./background-notification"
 export { createAutoUpdateCheckerHook } from "./auto-update-checker";
+export { createUltraworkModeHook } from "./ultrawork-mode";
diff --git a/src/hooks/ultrawork-mode/constants.ts b/src/hooks/ultrawork-mode/constants.ts
new file mode 100644
index 0000000..4341346
--- /dev/null
+++ b/src/hooks/ultrawork-mode/constants.ts
@@ -0,0 +1,48 @@
+/** Keyword patterns - "ultrawork", "ulw" (case-insensitive, word boundary) */
+export const ULTRAWORK_PATTERNS = [/\bultrawork\b/i, /\bulw\b/i]
+
+/** Code block pattern to exclude from keyword detection */
+export const CODE_BLOCK_PATTERN = /```[\s\S]*?```/g
+
+/** Inline code pattern to exclude */
+export const INLINE_CODE_PATTERN = /`[^`]+`/g
+
+/**
+ * ULTRAWORK_CONTEXT - Agent-Agnostic Guidance
+ *
+ * Key principles:
+ * - NO specific agent names (oracle, librarian, etc.)
+ * - Only provide guidance based on agent role/capability
+ * - Emphasize parallel execution, TODO tracking, delegation
+ */
+export const ULTRAWORK_CONTEXT = `<ultrawork-mode>
+[CODE RED] Maximum precision required. Ultrathink before acting.
+
+YOU MUST LEVERAGE ALL AVAILABLE AGENTS TO THEIR FULLEST POTENTIAL.
+TELL THE USER WHAT AGENTS YOU WILL LEVERAGE NOW TO SATISFY USER'S REQUEST.
+
+## AGENT UTILIZATION PRINCIPLES (by capability, not by name)
+- **Codebase Exploration**: Spawn exploration agents using BACKGROUND TASKS for file patterns, internal implementations, project structure
+- **Documentation & References**: Use librarian-type agents via BACKGROUND TASKS for API references, examples, external library docs
+- **Planning & Strategy**: NEVER plan yourself - ALWAYS spawn a dedicated planning agent for work breakdown
+- **High-IQ Reasoning**: Leverage specialized agents for architecture decisions, code review, strategic planning
+- **Frontend/UI Tasks**: Delegate to UI-specialized agents for design and implementation
+
+## EXECUTION RULES
+- **TODO**: Track EVERY step. Mark complete IMMEDIATELY after each.
+- **PARALLEL**: Fire independent agent calls simultaneously via background_task - NEVER wait sequentially.
+- **BACKGROUND FIRST**: Use background_task for exploration/research agents (10+ concurrent if needed).
+- **VERIFY**: Re-read request after completion. Check ALL requirements met before reporting done.
+- **DELEGATE**: Don't do everything yourself - orchestrate specialized agents for their strengths.
+
+## WORKFLOW
+1. Analyze the request and identify required capabilities
+2. Spawn exploration/librarian agents via background_task in PARALLEL (10+ if needed)
+3. Use planning agents to create detailed work breakdown
+4. Execute with continuous verification against original requirements
+
+</ultrawork-mode>
+
+---
+
+`
diff --git a/src/hooks/ultrawork-mode/detector.ts b/src/hooks/ultrawork-mode/detector.ts
new file mode 100644
index 0000000..898c480
--- /dev/null
+++ b/src/hooks/ultrawork-mode/detector.ts
@@ -0,0 +1,33 @@
+import {
+  ULTRAWORK_PATTERNS,
+  CODE_BLOCK_PATTERN,
+  INLINE_CODE_PATTERN,
+} from "./constants"
+
+/**
+ * Remove code blocks and inline code from text.
+ * Prevents false positives when keywords appear in code.
+ */
+export function removeCodeBlocks(text: string): string {
+  return text.replace(CODE_BLOCK_PATTERN, "").replace(INLINE_CODE_PATTERN, "")
+}
+
+/**
+ * Detect ultrawork keywords in text (excluding code blocks).
+ */
+export function detectUltraworkKeyword(text: string): boolean {
+  const textWithoutCode = removeCodeBlocks(text)
+  return ULTRAWORK_PATTERNS.some((pattern) => pattern.test(textWithoutCode))
+}
+
+/**
+ * Extract text content from message parts.
+ */
+export function extractPromptText(
+  parts: Array<{ type: string; text?: string }>
+): string {
+  return parts
+    .filter((p) => p.type === "text")
+    .map((p) => p.text || "")
+    .join("")
+}
diff --git a/src/hooks/ultrawork-mode/index.ts b/src/hooks/ultrawork-mode/index.ts
new file mode 100644
index 0000000..312ba7f
--- /dev/null
+++ b/src/hooks/ultrawork-mode/index.ts
@@ -0,0 +1,84 @@
+import { detectUltraworkKeyword, extractPromptText } from "./detector"
+import { ULTRAWORK_CONTEXT } from "./constants"
+import type { UltraworkModeState } from "./types"
+import { log } from "../../shared"
+
+export * from "./detector"
+export * from "./constants"
+export * from "./types"
+
+const ultraworkModeState = new Map<string, UltraworkModeState>()
+
+export function clearUltraworkModeState(sessionID: string): void {
+  ultraworkModeState.delete(sessionID)
+}
+
+export function createUltraworkModeHook() {
+  return {
+    /**
+     * chat.message hook - detect ultrawork/ulw keywords, inject context
+     *
+     * Execution timing: AFTER claudeCodeHooks["chat.message"]
+     * Behavior:
+     *   1. Extract text from user prompt
+     *   2. Detect ultrawork/ulw keywords (excluding code blocks)
+     *   3. If detected, prepend ULTRAWORK_CONTEXT to first text part
+     */
+    "chat.message": async (
+      input: {
+        sessionID: string
+        agent?: string
+        model?: { providerID: string; modelID: string }
+        messageID?: string
+      },
+      output: {
+        message: Record<string, unknown>
+        parts: Array<{ type: string; text?: string; [key: string]: unknown }>
+      }
+    ): Promise<void> => {
+      const state: UltraworkModeState = {
+        detected: false,
+        injected: false,
+      }
+
+      const promptText = extractPromptText(output.parts)
+
+      if (!detectUltraworkKeyword(promptText)) {
+        ultraworkModeState.set(input.sessionID, state)
+        return
+      }
+
+      state.detected = true
+      log("Ultrawork keyword detected", { sessionID: input.sessionID })
+
+      const parts = output.parts as Array<{ type: string; text?: string }>
+      const idx = parts.findIndex((p) => p.type === "text" && p.text)
+
+      if (idx >= 0) {
+        parts[idx].text = `${ULTRAWORK_CONTEXT}${parts[idx].text ?? ""}`
+        state.injected = true
+        log("Ultrawork context injected", { sessionID: input.sessionID })
+      }
+
+      ultraworkModeState.set(input.sessionID, state)
+    },
+
+    /**
+     * event hook - cleanup session state on deletion
+     */
+    event: async ({
+      event,
+    }: {
+      event: { type: string; properties?: unknown }
+    }) => {
+      if (event.type === "session.deleted") {
+        const props = event.properties as
+          | { info?: { id?: string } }
+          | undefined
+        if (props?.info?.id) {
+          ultraworkModeState.delete(props.info.id)
+        }
+      }
+    },
+  }
+}
diff --git a/src/hooks/ultrawork-mode/types.ts b/src/hooks/ultrawork-mode/types.ts
new file mode 100644
index 0000000..6c92ace
--- /dev/null
+++ b/src/hooks/ultrawork-mode/types.ts
@@ -0,0 +1,20 @@
+export interface UltraworkModeState {
+  /** Whether ultrawork keyword was detected */
+  detected: boolean
+  /** Whether context was injected */
+  injected: boolean
+}
+
+export interface ModelRef {
+  providerID: string
+  modelID: string
+}
+
+export interface MessageWithModel {
+  model?: ModelRef
+}
+
+export interface UltraworkModeInput {
+  parts: Array<{ type: string; text?: string }>
+  message: MessageWithModel
+}
diff --git a/src/index.ts b/src/index.ts
index ba4dca5..84d2207 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,6 +16,7 @@ import {
   createRulesInjectorHook,
   createBackgroundNotificationHook,
   createAutoUpdateCheckerHook,
+  createUltraworkModeHook,
 } from "./hooks";
 import { createGoogleAntigravityAuthPlugin } from "./auth/antigravity";
 import {
@@ -203,6 +204,9 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
   const autoUpdateChecker = isHookEnabled("auto-update-checker")
     ? createAutoUpdateCheckerHook(ctx)
     : null;
+  const ultraworkMode = isHookEnabled("ultrawork-mode")
+    ? createUltraworkModeHook()
+    : null;
 
   updateTerminalTitle({ sessionId: "main" });
 
@@ -230,6 +234,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
 
     "chat.message": async (input, output) => {
       await claudeCodeHooks["chat.message"]?.(input, output);
+      await ultraworkMode?.["chat.message"]?.(input, output);
     },
 
     config: async (config) => {
@@ -304,6 +309,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       await rulesInjector?.event(input);
       await thinkMode?.event(input);
       await anthropicAutoCompact?.event(input);
+      await ultraworkMode?.event(input);
 
       const { event } = input;
       const props = event.properties as Record<string, unknown> | undefined;