diff --git a/src/features/background-agent/manager.ts b/src/features/background-agent/manager.ts
index e20f84146..95526dcba 100644
--- a/src/features/background-agent/manager.ts
+++ b/src/features/background-agent/manager.ts
@@ -16,7 +16,6 @@ import {
   DEFAULT_STALE_TIMEOUT_MS,
   MIN_IDLE_TIME_MS,
   MIN_RUNTIME_BEFORE_STALE_MS,
-  MIN_STABILITY_TIME_MS,
   POLLING_INTERVAL_MS,
   TASK_CLEANUP_DELAY_MS,
   TASK_TTL_MS,
diff --git a/src/tools/background-task/create-background-cancel.ts b/src/tools/background-task/create-background-cancel.ts
index fb584e9b3..49fc4e5bb 100644
--- a/src/tools/background-task/create-background-cancel.ts
+++ b/src/tools/background-task/create-background-cancel.ts
@@ -4,7 +4,7 @@ import type { BackgroundCancelArgs } from "./types"
 import type { BackgroundCancelClient } from "./clients"
 import { BACKGROUND_CANCEL_DESCRIPTION } from "./constants"
 
-export function createBackgroundCancel(manager: BackgroundManager, client: BackgroundCancelClient): ToolDefinition {
+export function createBackgroundCancel(manager: BackgroundManager, _client: BackgroundCancelClient): ToolDefinition {
   return tool({
     description: BACKGROUND_CANCEL_DESCRIPTION,
     args: {
diff --git a/src/tools/background-task/modules/background-cancel.ts b/src/tools/background-task/modules/background-cancel.ts
index 2bc7e172c..f26bba5f9 100644
--- a/src/tools/background-task/modules/background-cancel.ts
+++ b/src/tools/background-task/modules/background-cancel.ts
@@ -4,7 +4,7 @@ import type { BackgroundManager } from "../../../features/background-agent"
 import type { BackgroundCancelArgs } from "../types"
 import { BACKGROUND_CANCEL_DESCRIPTION } from "../constants"
 
-export function createBackgroundCancel(manager: BackgroundManager, client: BackgroundCancelClient): ToolDefinition {
+export function createBackgroundCancel(manager: BackgroundManager, _client: BackgroundCancelClient): ToolDefinition {
   return tool({
     description: BACKGROUND_CANCEL_DESCRIPTION,
     args: {
diff --git a/src/tools/background-task/modules/background-task.ts b/src/tools/background-task/modules/background-task.ts
index 4fa468766..142dd8500 100644
--- a/src/tools/background-task/modules/background-task.ts
+++ b/src/tools/background-task/modules/background-task.ts
@@ -2,7 +2,7 @@ import { tool, type ToolDefinition } from "@opencode-ai/plugin"
 import type { BackgroundManager } from "../../../features/background-agent"
 import type { BackgroundTaskArgs } from "../types"
 import { BACKGROUND_TASK_DESCRIPTION } from "../constants"
-import { findNearestMessageWithFields, findFirstMessageWithAgent, MESSAGE_STORAGE } from "../../../features/hook-message-injector"
+import { findNearestMessageWithFields, findFirstMessageWithAgent } from "../../../features/hook-message-injector"
 import { getSessionAgent } from "../../../features/claude-code-session-state"
 import { log } from "../../../shared/logger"
 import { storeToolMetadata } from "../../../features/tool-metadata-store"
diff --git a/src/tools/call-omo-agent/background-executor.ts b/src/tools/call-omo-agent/background-executor.ts
index c9eb9ef40..b59473d2a 100644
--- a/src/tools/call-omo-agent/background-executor.ts
+++ b/src/tools/call-omo-agent/background-executor.ts
@@ -2,7 +2,6 @@ import type { CallOmoAgentArgs } from "./types"
 import type { BackgroundManager } from "../../features/background-agent"
 import type { PluginInput } from "@opencode-ai/plugin"
 import { log } from "../../shared"
-import { consumeNewMessages } from "../../shared/session-cursor"
 import { resolveMessageContext } from "../../features/hook-message-injector"
 import { getSessionAgent } from "../../features/claude-code-session-state"
 import { getMessageDir } from "./message-dir"