diff --git a/assets/oh-my-opencode.schema.json b/assets/oh-my-opencode.schema.json
index d9498a73..416acff9 100644
--- a/assets/oh-my-opencode.schema.json
+++ b/assets/oh-my-opencode.schema.json
@@ -80,7 +80,8 @@
           "prometheus-md-only",
           "sisyphus-junior-notepad",
           "start-work",
-          "atlas"
+          "atlas",
+          "stop-continuation-guard"
         ]
       }
     },
diff --git a/src/config/schema.ts b/src/config/schema.ts
index 1c887b75..1598ed71 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -88,6 +88,7 @@ export const HookNameSchema = z.enum([
   "sisyphus-junior-notepad",
   "start-work",
   "atlas",
+  "stop-continuation-guard",
 ])
 
 export const BuiltinCommandNameSchema = z.enum([
diff --git a/src/features/builtin-commands/commands.ts b/src/features/builtin-commands/commands.ts
index eec67a9a..998ce253 100644
--- a/src/features/builtin-commands/commands.ts
+++ b/src/features/builtin-commands/commands.ts
@@ -2,6 +2,7 @@ import type { CommandDefinition } from "../claude-code-command-loader"
 import type { BuiltinCommandName, BuiltinCommands } from "./types"
 import { INIT_DEEP_TEMPLATE } from "./templates/init-deep"
 import { RALPH_LOOP_TEMPLATE, CANCEL_RALPH_TEMPLATE } from "./templates/ralph-loop"
+import { STOP_CONTINUATION_TEMPLATE } from "./templates/stop-continuation"
 import { REFACTOR_TEMPLATE } from "./templates/refactor"
 import { START_WORK_TEMPLATE } from "./templates/start-work"
 
@@ -70,6 +71,12 @@ $ARGUMENTS
 </user-request>`,
     argumentHint: "[plan-name]",
   },
+  "stop-continuation": {
+    description: "(builtin) Stop all continuation mechanisms (ralph loop, todo continuation, boulder) for this session",
+    template: `<command-instruction>
+${STOP_CONTINUATION_TEMPLATE}
+</command-instruction>`,
+  },
 }
 
 export function loadBuiltinCommands(
diff --git a/src/features/builtin-commands/templates/stop-continuation.test.ts b/src/features/builtin-commands/templates/stop-continuation.test.ts
new file mode 100644
index 00000000..7aa5b714
--- /dev/null
+++ b/src/features/builtin-commands/templates/stop-continuation.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, test } from "bun:test"
+import { STOP_CONTINUATION_TEMPLATE } from "./stop-continuation"
+
+describe("stop-continuation template", () => {
+  test("should export a non-empty template string", () => {
+    // #given - the stop-continuation template
+
+    // #when - we access the template
+
+    // #then - it should be a non-empty string
+    expect(typeof STOP_CONTINUATION_TEMPLATE).toBe("string")
+    expect(STOP_CONTINUATION_TEMPLATE.length).toBeGreaterThan(0)
+  })
+
+  test("should describe the stop-continuation behavior", () => {
+    // #given - the stop-continuation template
+
+    // #when - we check the content
+
+    // #then - it should mention key behaviors
+    expect(STOP_CONTINUATION_TEMPLATE).toContain("todo-continuation-enforcer")
+    expect(STOP_CONTINUATION_TEMPLATE).toContain("Ralph Loop")
+    expect(STOP_CONTINUATION_TEMPLATE).toContain("boulder state")
+  })
+})
diff --git a/src/features/builtin-commands/templates/stop-continuation.ts b/src/features/builtin-commands/templates/stop-continuation.ts
new file mode 100644
index 00000000..036d007b
--- /dev/null
+++ b/src/features/builtin-commands/templates/stop-continuation.ts
@@ -0,0 +1,13 @@
+export const STOP_CONTINUATION_TEMPLATE = `Stop all continuation mechanisms for the current session.
+
+This command will:
+1. Stop the todo-continuation-enforcer from automatically continuing incomplete tasks
+2. Cancel any active Ralph Loop
+3. Clear the boulder state for the current project
+
+After running this command:
+- The session will not auto-continue when idle
+- You can manually continue work when ready
+- The stop state is per-session and clears when the session ends
+
+Use this when you need to pause automated continuation and take manual control.`
diff --git a/src/features/builtin-commands/types.ts b/src/features/builtin-commands/types.ts
index c626092c..1b148774 100644
--- a/src/features/builtin-commands/types.ts
+++ b/src/features/builtin-commands/types.ts
@@ -1,6 +1,6 @@
 import type { CommandDefinition } from "../claude-code-command-loader"
 
-export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph" | "ulw-loop" | "refactor" | "start-work"
+export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph" | "ulw-loop" | "refactor" | "start-work" | "stop-continuation"
 
 export interface BuiltinCommandConfig {
   disabled_commands?: BuiltinCommandName[]
diff --git a/src/hooks/index.ts b/src/hooks/index.ts
index 7206def3..c8f3c0c3 100644
--- a/src/hooks/index.ts
+++ b/src/hooks/index.ts
@@ -34,3 +34,4 @@ export { createAtlasHook } from "./atlas";
 export { createDelegateTaskRetryHook } from "./delegate-task-retry";
 export { createQuestionLabelTruncatorHook } from "./question-label-truncator";
 export { createSubagentQuestionBlockerHook } from "./subagent-question-blocker";
+export { createStopContinuationGuardHook, type StopContinuationGuard } from "./stop-continuation-guard";
diff --git a/src/hooks/stop-continuation-guard/index.test.ts b/src/hooks/stop-continuation-guard/index.test.ts
new file mode 100644
index 00000000..028d2cb6
--- /dev/null
+++ b/src/hooks/stop-continuation-guard/index.test.ts
@@ -0,0 +1,106 @@
+import { describe, expect, test } from "bun:test"
+import { createStopContinuationGuardHook } from "./index"
+
+describe("stop-continuation-guard", () => {
+  function createMockPluginInput() {
+    return {
+      client: {
+        tui: {
+          showToast: async () => ({}),
+        },
+      },
+      directory: "/tmp/test",
+    } as never
+  }
+
+  test("should mark session as stopped", () => {
+    // #given - a guard hook with no stopped sessions
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+    const sessionID = "test-session-1"
+
+    // #when - we stop continuation for the session
+    guard.stop(sessionID)
+
+    // #then - session should be marked as stopped
+    expect(guard.isStopped(sessionID)).toBe(true)
+  })
+
+  test("should return false for non-stopped sessions", () => {
+    // #given - a guard hook with no stopped sessions
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+
+    // #when - we check a session that was never stopped
+
+    // #then - it should return false
+    expect(guard.isStopped("non-existent-session")).toBe(false)
+  })
+
+  test("should clear stopped state for a session", () => {
+    // #given - a session that was stopped
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+    const sessionID = "test-session-2"
+    guard.stop(sessionID)
+
+    // #when - we clear the session
+    guard.clear(sessionID)
+
+    // #then - session should no longer be stopped
+    expect(guard.isStopped(sessionID)).toBe(false)
+  })
+
+  test("should handle multiple sessions independently", () => {
+    // #given - multiple sessions with different stop states
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+    const session1 = "session-1"
+    const session2 = "session-2"
+    const session3 = "session-3"
+
+    // #when - we stop some sessions but not others
+    guard.stop(session1)
+    guard.stop(session2)
+
+    // #then - each session has its own state
+    expect(guard.isStopped(session1)).toBe(true)
+    expect(guard.isStopped(session2)).toBe(true)
+    expect(guard.isStopped(session3)).toBe(false)
+  })
+
+  test("should clear session on session.deleted event", async () => {
+    // #given - a session that was stopped
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+    const sessionID = "test-session-3"
+    guard.stop(sessionID)
+
+    // #when - session is deleted
+    await guard.event({
+      event: {
+        type: "session.deleted",
+        properties: { info: { id: sessionID } },
+      },
+    })
+
+    // #then - session should no longer be stopped (cleaned up)
+    expect(guard.isStopped(sessionID)).toBe(false)
+  })
+
+  test("should not affect other sessions on session.deleted", async () => {
+    // #given - multiple stopped sessions
+    const guard = createStopContinuationGuardHook(createMockPluginInput())
+    const session1 = "session-keep"
+    const session2 = "session-delete"
+    guard.stop(session1)
+    guard.stop(session2)
+
+    // #when - one session is deleted
+    await guard.event({
+      event: {
+        type: "session.deleted",
+        properties: { info: { id: session2 } },
+      },
+    })
+
+    // #then - other session should remain stopped
+    expect(guard.isStopped(session1)).toBe(true)
+    expect(guard.isStopped(session2)).toBe(false)
+  })
+})
diff --git a/src/hooks/stop-continuation-guard/index.ts b/src/hooks/stop-continuation-guard/index.ts
new file mode 100644
index 00000000..e08e9969
--- /dev/null
+++ b/src/hooks/stop-continuation-guard/index.ts
@@ -0,0 +1,54 @@
+import type { PluginInput } from "@opencode-ai/plugin"
+import { log } from "../../shared/logger"
+
+const HOOK_NAME = "stop-continuation-guard"
+
+export interface StopContinuationGuard {
+  event: (input: { event: { type: string; properties?: unknown } }) => Promise<void>
+  stop: (sessionID: string) => void
+  isStopped: (sessionID: string) => boolean
+  clear: (sessionID: string) => void
+}
+
+export function createStopContinuationGuardHook(
+  _ctx: PluginInput
+): StopContinuationGuard {
+  const stoppedSessions = new Set<string>()
+
+  const stop = (sessionID: string): void => {
+    stoppedSessions.add(sessionID)
+    log(`[${HOOK_NAME}] Continuation stopped for session`, { sessionID })
+  }
+
+  const isStopped = (sessionID: string): boolean => {
+    return stoppedSessions.has(sessionID)
+  }
+
+  const clear = (sessionID: string): void => {
+    stoppedSessions.delete(sessionID)
+    log(`[${HOOK_NAME}] Continuation guard cleared for session`, { sessionID })
+  }
+
+  const event = async ({
+    event,
+  }: {
+    event: { type: string; properties?: unknown }
+  }): Promise<void> => {
+    const props = event.properties as Record<string, unknown> | undefined
+
+    if (event.type === "session.deleted") {
+      const sessionInfo = props?.info as { id?: string } | undefined
+      if (sessionInfo?.id) {
+        clear(sessionInfo.id)
+        log(`[${HOOK_NAME}] Session deleted: cleaned up`, { sessionID: sessionInfo.id })
+      }
+    }
+  }
+
+  return {
+    event,
+    stop,
+    isStopped,
+    clear,
+  }
+}
diff --git a/src/hooks/todo-continuation-enforcer.test.ts b/src/hooks/todo-continuation-enforcer.test.ts
index fa33b84f..de0ded44 100644
--- a/src/hooks/todo-continuation-enforcer.test.ts
+++ b/src/hooks/todo-continuation-enforcer.test.ts
@@ -1178,4 +1178,68 @@ describe("todo-continuation-enforcer", () => {
     // #then - continuation injected (no agents to skip)
     expect(promptCalls.length).toBe(1)
   })
+
+  test("should not inject when isContinuationStopped returns true", async () => {
+    // #given - session with continuation stopped
+    const sessionID = "main-stopped"
+    setMainSession(sessionID)
+
+    const hook = createTodoContinuationEnforcer(createMockPluginInput(), {
+      isContinuationStopped: (id) => id === sessionID,
+    })
+
+    // #when - session goes idle
+    await hook.handler({
+      event: { type: "session.idle", properties: { sessionID } },
+    })
+
+    await fakeTimers.advanceBy(3000)
+
+    // #then - no continuation injected (stopped flag is true)
+    expect(promptCalls).toHaveLength(0)
+  })
+
+  test("should inject when isContinuationStopped returns false", async () => {
+    // #given - session with continuation not stopped
+    const sessionID = "main-not-stopped"
+    setMainSession(sessionID)
+
+    const hook = createTodoContinuationEnforcer(createMockPluginInput(), {
+      isContinuationStopped: () => false,
+    })
+
+    // #when - session goes idle
+    await hook.handler({
+      event: { type: "session.idle", properties: { sessionID } },
+    })
+
+    await fakeTimers.advanceBy(3000)
+
+    // #then - continuation injected (stopped flag is false)
+    expect(promptCalls.length).toBe(1)
+  })
+
+  test("should cancel all countdowns via cancelAllCountdowns", async () => {
+    // #given - multiple sessions with running countdowns
+    const session1 = "main-cancel-all-1"
+    const session2 = "main-cancel-all-2"
+    setMainSession(session1)
+
+    const hook = createTodoContinuationEnforcer(createMockPluginInput(), {})
+
+    // #when - first session goes idle
+    await hook.handler({
+      event: { type: "session.idle", properties: { sessionID: session1 } },
+    })
+    await fakeTimers.advanceBy(500)
+
+    // #when - cancel all countdowns
+    hook.cancelAllCountdowns()
+
+    // #when - advance past countdown time
+    await fakeTimers.advanceBy(3000)
+
+    // #then - no continuation injected (all countdowns cancelled)
+    expect(promptCalls).toHaveLength(0)
+  })
 })
diff --git a/src/hooks/todo-continuation-enforcer.ts b/src/hooks/todo-continuation-enforcer.ts
index d93bd16d..c3ed8389 100644
--- a/src/hooks/todo-continuation-enforcer.ts
+++ b/src/hooks/todo-continuation-enforcer.ts
@@ -18,12 +18,14 @@ const DEFAULT_SKIP_AGENTS = ["prometheus", "compaction"]
 export interface TodoContinuationEnforcerOptions {
   backgroundManager?: BackgroundManager
   skipAgents?: string[]
+  isContinuationStopped?: (sessionID: string) => boolean
 }
 
 export interface TodoContinuationEnforcer {
   handler: (input: { event: { type: string; properties?: unknown } }) => Promise<void>
   markRecovering: (sessionID: string) => void
   markRecoveryComplete: (sessionID: string) => void
+  cancelAllCountdowns: () => void
 }
 
 interface Todo {
@@ -95,7 +97,7 @@ export function createTodoContinuationEnforcer(
   ctx: PluginInput,
   options: TodoContinuationEnforcerOptions = {}
 ): TodoContinuationEnforcer {
-  const { backgroundManager, skipAgents = DEFAULT_SKIP_AGENTS } = options
+  const { backgroundManager, skipAgents = DEFAULT_SKIP_AGENTS, isContinuationStopped } = options
   const sessions = new Map<string, SessionState>()
 
   function getState(sessionID: string): SessionState {
@@ -420,6 +422,11 @@ export function createTodoContinuationEnforcer(
         return
       }
 
+      if (isContinuationStopped?.(sessionID)) {
+        log(`[${HOOK_NAME}] Skipped: continuation stopped for session`, { sessionID })
+        return
+      }
+
       startCountdown(sessionID, incompleteCount, todos.length, resolvedInfo)
       return
     }
@@ -485,9 +492,17 @@ export function createTodoContinuationEnforcer(
     }
   }
 
+  const cancelAllCountdowns = (): void => {
+    for (const sessionID of sessions.keys()) {
+      cancelCountdown(sessionID)
+    }
+    log(`[${HOOK_NAME}] All countdowns cancelled`)
+  }
+
   return {
     handler,
     markRecovering,
     markRecoveryComplete,
+    cancelAllCountdowns,
   }
 }
diff --git a/src/index.ts b/src/index.ts
index f97410e1..1e1d2083 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,6 +35,7 @@ import {
   createSisyphusJuniorNotepadHook,
   createQuestionLabelTruncatorHook,
   createSubagentQuestionBlockerHook,
+  createStopContinuationGuardHook,
 } from "./hooks";
 import {
   contextCollector,
@@ -77,6 +78,7 @@ import { BackgroundManager } from "./features/background-agent";
 import { SkillMcpManager } from "./features/skill-mcp-manager";
 import { initTaskToastManager } from "./features/task-toast-manager";
 import { TmuxSessionManager } from "./features/tmux-subagent";
+import { clearBoulderState } from "./features/boulder-state";
 import { type HookName } from "./config";
 import { log, detectExternalNotificationPlugin, getNotificationConflictWarning, resetMessageCursor, includesCaseInsensitive, hasConnectedProvidersCache, getOpenCodeVersion, isOpenCodeVersionAtLeast, OPENCODE_NATIVE_AGENTS_INJECTION_VERSION } from "./shared";
 import { loadPluginConfig } from "./plugin-config";
@@ -277,8 +279,15 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
 
   initTaskToastManager(ctx.client);
 
+  const stopContinuationGuard = isHookEnabled("stop-continuation-guard")
+    ? createStopContinuationGuardHook(ctx)
+    : null;
+
   const todoContinuationEnforcer = isHookEnabled("todo-continuation-enforcer")
-    ? createTodoContinuationEnforcer(ctx, { backgroundManager })
+    ? createTodoContinuationEnforcer(ctx, {
+        backgroundManager,
+        isContinuationStopped: stopContinuationGuard?.isStopped,
+      })
     : null;
 
   if (sessionRecovery && todoContinuationEnforcer) {
@@ -521,6 +530,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       await categorySkillReminder?.event(input);
       await interactiveBashSession?.event(input);
       await ralphLoop?.event(input);
+      await stopContinuationGuard?.event(input);
       await atlasHook?.handler(input);
 
       const { event } = input;
@@ -664,14 +674,28 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
            );
 
            ralphLoop.startLoop(sessionID, prompt, {
-             ultrawork: true,
-             maxIterations: maxIterMatch
-               ? parseInt(maxIterMatch[1], 10)
-               : undefined,
-             completionPromise: promiseMatch?.[1],
-           });
+              ultrawork: true,
+              maxIterations: maxIterMatch
+                ? parseInt(maxIterMatch[1], 10)
+                : undefined,
+              completionPromise: promiseMatch?.[1],
+            });
          }
       }
+
+      if (input.tool === "slashcommand") {
+        const args = output.args as { command?: string } | undefined;
+        const command = args?.command?.replace(/^\//, "").toLowerCase();
+        const sessionID = input.sessionID || getMainSessionID();
+
+        if (command === "stop-continuation" && sessionID) {
+          stopContinuationGuard?.stop(sessionID);
+          todoContinuationEnforcer?.cancelAllCountdowns();
+          ralphLoop?.cancelLoop(sessionID);
+          clearBoulderState(ctx.directory);
+          log("[stop-continuation] All continuation mechanisms stopped", { sessionID });
+        }
+      }
     },
 
     "tool.execute.after": async (input, output) => {