feat(hooks): add tool-output-truncator for dynamic context-aware truncation

Refactor grep-output-truncator into a general-purpose tool-output-truncator
that applies dynamic truncation to multiple tools based on context window usage.

Truncated tools:
- Grep, safe_grep (existing)
- Glob, safe_glob (new)
- lsp_find_references (new)
- lsp_document_symbols (new)
- lsp_workspace_symbols (new)
- lsp_diagnostics (new)
- ast_grep_search (new)

Uses the new dynamic-truncator utility from shared/ for context-aware
output size limits based on remaining context window tokens.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/config/schema.ts

@@ -44,6 +44,7 @@ export const HookNameSchema = z.enum([
   "session-notification",
   "comment-checker",
   "grep-output-truncator",
+  "tool-output-truncator",
   "directory-agents-injector",
   "directory-readme-injector",
   "empty-task-response-detector",
@@ -52,7 +53,7 @@ export const HookNameSchema = z.enum([
   "rules-injector",
   "background-notification",
   "auto-update-checker",
-  "ultrawork-mode",
+  "keyword-detector",
   "agent-usage-reminder",
 ])
 

src/hooks/index.ts

@@ -4,6 +4,7 @@ export { createSessionNotification } from "./session-notification";
 export { createSessionRecoveryHook, type SessionRecoveryHook } from "./session-recovery";
 export { createCommentCheckerHooks } from "./comment-checker";
 export { createGrepOutputTruncatorHook } from "./grep-output-truncator";
+export { createToolOutputTruncatorHook } from "./tool-output-truncator";
 export { createDirectoryAgentsInjectorHook } from "./directory-agents-injector";
 export { createDirectoryReadmeInjectorHook } from "./directory-readme-injector";
 export { createEmptyTaskResponseDetectorHook } from "./empty-task-response-detector";
@@ -13,5 +14,6 @@ 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";
+
 export { createAgentUsageReminderHook } from "./agent-usage-reminder";
+export { createKeywordDetectorHook } from "./keyword-detector";

src/hooks/tool-output-truncator.ts

@@ -0,0 +1,38 @@
+import type { PluginInput } from "@opencode-ai/plugin"
+import { createDynamicTruncator } from "../shared/dynamic-truncator"
+
+const TRUNCATABLE_TOOLS = [
+  "Grep",
+  "safe_grep",
+  "Glob",
+  "safe_glob",
+  "lsp_find_references",
+  "lsp_document_symbols",
+  "lsp_workspace_symbols",
+  "lsp_diagnostics",
+  "ast_grep_search",
+]
+
+export function createToolOutputTruncatorHook(ctx: PluginInput) {
+  const truncator = createDynamicTruncator(ctx)
+
+  const toolExecuteAfter = async (
+    input: { tool: string; sessionID: string; callID: string },
+    output: { title: string; output: string; metadata: unknown }
+  ) => {
+    if (!TRUNCATABLE_TOOLS.includes(input.tool)) return
+
+    try {
+      const { result, truncated } = await truncator.truncate(input.sessionID, output.output)
+      if (truncated) {
+        output.output = result
+      }
+    } catch {
+      // Graceful degradation - don't break tool execution
+    }
+  }
+
+  return {
+    "tool.execute.after": toolExecuteAfter,
+  }
+}

src/index.ts

@@ -6,7 +6,7 @@ import {
   createSessionRecoveryHook,
   createSessionNotification,
   createCommentCheckerHooks,
-  createGrepOutputTruncatorHook,
+  createToolOutputTruncatorHook,
   createDirectoryAgentsInjectorHook,
   createDirectoryReadmeInjectorHook,
   createEmptyTaskResponseDetectorHook,
@@ -16,7 +16,7 @@ import {
   createRulesInjectorHook,
   createBackgroundNotificationHook,
   createAutoUpdateCheckerHook,
-  createUltraworkModeHook,
+  createKeywordDetectorHook,
   createAgentUsageReminderHook,
 } from "./hooks";
 import { createGoogleAntigravityAuthPlugin } from "./auth/antigravity";
@@ -178,8 +178,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
   const commentChecker = isHookEnabled("comment-checker")
     ? createCommentCheckerHooks()
     : null;
-  const grepOutputTruncator = isHookEnabled("grep-output-truncator")
+  const toolOutputTruncator = isHookEnabled("tool-output-truncator")
-    ? createGrepOutputTruncatorHook(ctx)
+    ? createToolOutputTruncatorHook(ctx)
     : null;
   const directoryAgentsInjector = isHookEnabled("directory-agents-injector")
     ? createDirectoryAgentsInjectorHook(ctx)
@@ -205,8 +205,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
   const autoUpdateChecker = isHookEnabled("auto-update-checker")
     ? createAutoUpdateCheckerHook(ctx)
     : null;
-  const ultraworkMode = isHookEnabled("ultrawork-mode")
+  const keywordDetector = isHookEnabled("keyword-detector")
-    ? createUltraworkModeHook()
+    ? createKeywordDetectorHook()
     : null;
   const agentUsageReminder = isHookEnabled("agent-usage-reminder")
     ? createAgentUsageReminderHook(ctx)
@@ -240,7 +240,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
 
     "chat.message": async (input, output) => {
       await claudeCodeHooks["chat.message"]?.(input, output);
-      await ultraworkMode?.["chat.message"]?.(input, output);
+      await keywordDetector?.["chat.message"]?.(input, output);
     },
 
     config: async (config) => {
@@ -337,7 +337,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       await rulesInjector?.event(input);
       await thinkMode?.event(input);
       await anthropicAutoCompact?.event(input);
-      await ultraworkMode?.event(input);
+      await keywordDetector?.event(input);
       await agentUsageReminder?.event(input);
 
       const { event } = input;
@@ -451,7 +451,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
 
     "tool.execute.after": async (input, output) => {
       await claudeCodeHooks["tool.execute.after"](input, output);
-      await grepOutputTruncator?.["tool.execute.after"](input, output);
+      await toolOutputTruncator?.["tool.execute.after"](input, output);
       await contextWindowMonitor?.["tool.execute.after"](input, output);
       await commentChecker?.["tool.execute.after"](input, output);
       await directoryAgentsInjector?.["tool.execute.after"](input, output);