release: v0.1.26

- Add diagnosticsStore to capture Push model notifications
- Handle textDocument/publishDiagnostics notifications in processBuffer
- Fix workspace/configuration response for JSON LSP validation
- Add missing language mappings (json, html, css, sh, fish, md, tf)
- diagnostics() now tries Pull first, falls back to Push store

README.ko.md

@@ -136,6 +136,11 @@ OpenCode 는 아주 확장가능하고 아주 커스터마이저블합니다.
 - **Context Window Monitor**: [컨텍스트 윈도우 불안 관리](https://agentic-patterns.com/patterns/context-window-anxiety-management/) 패턴을 구현합니다.
   - 사용량이 70%를 넘으면 에이전트에게 아직 토큰이 충분하다고 상기시켜, 급하게 불완전한 작업을 하는 것을 완화합니다.
 - **Session Notification**: 에이전트가 작업을 마치면 OS 네이티브 알림을 보냅니다 (macOS, Linux, Windows).
+- **Session Recovery**: API 에러로부터 자동으로 복구하여 세션 안정성을 보장합니다. 네 가지 시나리오를 처리합니다:
+  - **Tool Result Missing**: `tool_use` 블록이 있지만 `tool_result`가 없을 때 (ESC 인터럽트) → "cancelled" tool result 주입
+  - **Thinking Block Order**: thinking 블록이 첫 번째여야 하는데 아닐 때 → 빈 thinking 블록 추가
+  - **Thinking Disabled Violation**: thinking 이 비활성화인데 thinking 블록이 있을 때 → thinking 블록 제거
+  - **Empty Content Message**: 메시지가 thinking/meta 블록만 있고 실제 내용이 없을 때 → 파일시스템을 통해 "(interrupted)" 텍스트 주입
 - **Comment Checker**: 코드 수정 후 불필요한 주석을 감지하여 보고합니다. BDD 패턴, 지시어, 독스트링 등 유효한 주석은 똑똑하게 제외하고, AI가 남긴 흔적을 제거하여 코드를 깨끗하게 유지합니다.
 
 ### Agents
@@ -146,12 +151,22 @@ OpenCode 는 아주 확장가능하고 아주 커스터마이저블합니다.
 - **frontend-ui-ux-engineer** (`google/gemini-3-pro-preview`): 개발자로 전향한 디자이너라는 설정을 갖고 있습니다. 멋진 UI를 만듭니다. 아름답고 창의적인 UI 코드를 생성하는 데 탁월한 Gemini를 사용합니다.
 - **document-writer** (`google/gemini-3-pro-preview`): 기술 문서 전문가라는 설정을 갖고 있습니다. Gemini 는 문학가입니다. 글을 기가막히게 씁니다.
 
+각 에이전트는 메인 에이전트가 알아서 호출하지만, 명시적으로 요청할 수도 있습니다:
+
+```
+@oracle 한테 이 부분 설계 고민하고서 아키텍쳐 제안을 부탁해줘
+@librarian 한테 이 부분 어떻게 구현돼있길래 자꾸 안에서 동작이 바뀌는지 알려달라고 해줘
+@explore 한테 이 기능 정책 알려달라고 해줘
+```
+
 에이전트의 모델, 프롬프트, 권한은 `oh-my-opencode.json`에서 커스텀할 수 있습니다. 자세한 내용은 [설정](#설정)을 참고하세요.
 
 ### Tools
 
 #### 내장 LSP Tools
 
+당신이 에디터에서 사용하는 그 기능을 다른 에이전트들은 사용하지 못합니다. Oh My OpenCode 는 당신만의 그 도구를 LLM Agent 에게 쥐어줍니다. 리팩토링하고, 탐색하고, 분석하는 모든 작업을 OpenCode 의 설정값을 그대로 사용하여 지원합니다.
+
 [OpenCode 는 LSP 를 제공하지만](https://opencode.ai/docs/lsp/), 오로지 분석용으로만 제공합니다. 탐색과 리팩토링을 위한 도구는 OpenCode 와 동일한 스펙과 설정으로 Oh My OpenCode 가 제공합니다.
 
 - **lsp_hover**: 위치의 타입 정보, 문서, 시그니처 가져오기

README.md

@@ -132,7 +132,11 @@ I believe in the right tool for the job. For your wallet's sake, use CLIProxyAPI
 - **Todo Continuation Enforcer**: Forces the agent to complete all tasks before exiting. Eliminates the common LLM issue of "giving up halfway".
 - **Context Window Monitor**: Implements [Context Window Anxiety Management](https://agentic-patterns.com/patterns/context-window-anxiety-management/). When context usage exceeds 70%, it reminds the agent that resources are sufficient, preventing rushed or low-quality output.
 - **Session Notification**: Sends a native OS notification when the job is done (macOS, Linux, Windows).
-- **Session Recovery**: Automatically recovers from API errors by injecting missing tool results and correcting thinking block violations, ensuring session stability.
+- **Session Recovery**: Automatically recovers from API errors, ensuring session stability. Handles four scenarios:
+  - **Tool Result Missing**: When `tool_use` block exists without `tool_result` (ESC interrupt) → injects "cancelled" tool results
+  - **Thinking Block Order**: When thinking block must be first but isn't → prepends empty thinking block
+  - **Thinking Disabled Violation**: When thinking blocks exist but thinking is disabled → strips thinking blocks
+  - **Empty Content Message**: When message has only thinking/meta blocks without actual content → injects "(interrupted)" text via filesystem
 - **Comment Checker**: Detects and reports unnecessary comments after code modifications. Smartly ignores valid patterns (BDD, directives, docstrings, shebangs) to keep the codebase clean from AI-generated artifacts.
 
 ### Agents
@@ -142,12 +146,22 @@ I believe in the right tool for the job. For your wallet's sake, use CLIProxyAPI
 - **frontend-ui-ux-engineer** (`google/gemini-3-pro-preview`): A designer turned developer. Creates stunning UIs. Uses Gemini because its creativity and UI code generation are superior.
 - **document-writer** (`google/gemini-3-pro-preview`): A technical writing expert. Gemini is a wordsmith; it writes prose that flows naturally.
 
+Each agent is automatically invoked by the main agent, but you can also explicitly request them:
+
+```
+@oracle Please think through the design of this part and suggest an architecture.
+@librarian Tell me how this is implemented — why does the behavior keep changing internally?
+@explore Tell me about the policy for this feature.
+```
+
 Agent models, prompts, and permissions can be customized via `oh-my-opencode.json`. See [Configuration](#configuration) for details.
 
 ### Tools
 
 #### Built-in LSP Tools
 
+The features you use in your editor—other agents cannot access them. Oh My OpenCode hands those very tools to your LLM Agent. Refactoring, navigation, and analysis are all supported using the same OpenCode configuration.
+
 [OpenCode provides LSP](https://opencode.ai/docs/lsp/), but only for analysis. Oh My OpenCode equips you with navigation and refactoring tools matching the same specification.
 
 - **lsp_hover**: Get type info, docs, signatures at position

bun.lock

@@ -9,6 +9,7 @@
         "@ast-grep/napi": "^0.40.0",
         "@code-yeongyu/comment-checker": "^0.4.1",
         "@opencode-ai/plugin": "^1.0.7",
+        "xdg-basedir": "^5.1.0",
         "zod": "^4.1.8",
       },
       "devDependencies": {
@@ -102,6 +103,8 @@
 
     "undici-types": ["undici-types@7.16.0", "", {}, "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="],
 
+    "xdg-basedir": ["xdg-basedir@5.1.0", "", {}, "sha512-GCPAHLvrIH13+c0SuacwvRYj2SxJXQ4kaVTT5xgL3kPrz56XxkF21IGhjSE1+W0aw7gpBWRGXLCPnPby6lSpmQ=="],
+
     "zod": ["zod@4.1.8", "", {}, "sha512-5R1P+WwQqmmMIEACyzSvo4JXHY5WiAFHRMg+zBZKgKS+Q1viRa0C1hmUKtHltoIFKtIdki3pRxkmpP74jnNYHQ=="],
   }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oh-my-opencode",
-  "version": "0.1.19",
+  "version": "0.1.26",
   "description": "OpenCode plugin - custom agents (oracle, librarian) and enhanced features",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -46,6 +46,7 @@
     "@ast-grep/napi": "^0.40.0",
     "@code-yeongyu/comment-checker": "^0.4.1",
     "@opencode-ai/plugin": "^1.0.7",
+    "xdg-basedir": "^5.1.0",
     "zod": "^4.1.8"
   },
   "devDependencies": {

src/hooks/grep-output-truncator.ts

@@ -0,0 +1,131 @@
+import type { PluginInput } from "@opencode-ai/plugin"
+
+const ANTHROPIC_ACTUAL_LIMIT = 200_000
+const CHARS_PER_TOKEN_ESTIMATE = 4
+const TARGET_MAX_TOKENS = 50_000
+
+interface AssistantMessageInfo {
+  role: "assistant"
+  tokens: {
+    input: number
+    output: number
+    reasoning: number
+    cache: { read: number; write: number }
+  }
+}
+
+interface MessageWrapper {
+  info: { role: string } & Partial<AssistantMessageInfo>
+}
+
+function estimateTokens(text: string): number {
+  return Math.ceil(text.length / CHARS_PER_TOKEN_ESTIMATE)
+}
+
+function truncateToTokenLimit(output: string, maxTokens: number): { result: string; truncated: boolean } {
+  const currentTokens = estimateTokens(output)
+
+  if (currentTokens <= maxTokens) {
+    return { result: output, truncated: false }
+  }
+
+  const lines = output.split("\n")
+
+  if (lines.length <= 3) {
+    const maxChars = maxTokens * CHARS_PER_TOKEN_ESTIMATE
+    return {
+      result: output.slice(0, maxChars) + "\n\n[Output truncated due to context window limit]",
+      truncated: true,
+    }
+  }
+
+  const headerLines = lines.slice(0, 3)
+  const contentLines = lines.slice(3)
+
+  const headerText = headerLines.join("\n")
+  const headerTokens = estimateTokens(headerText)
+  const availableTokens = maxTokens - headerTokens - 50
+
+  if (availableTokens <= 0) {
+    return {
+      result: headerText + "\n\n[Content truncated due to context window limit]",
+      truncated: true,
+    }
+  }
+
+  let resultLines: string[] = []
+  let currentTokenCount = 0
+
+  for (const line of contentLines) {
+    const lineTokens = estimateTokens(line + "\n")
+    if (currentTokenCount + lineTokens > availableTokens) {
+      break
+    }
+    resultLines.push(line)
+    currentTokenCount += lineTokens
+  }
+
+  const truncatedContent = [...headerLines, ...resultLines].join("\n")
+  const removedCount = contentLines.length - resultLines.length
+
+  return {
+    result: truncatedContent + `\n\n[${removedCount} more lines truncated due to context window limit]`,
+    truncated: true,
+  }
+}
+
+export function createGrepOutputTruncatorHook(ctx: PluginInput) {
+  const GREP_TOOLS = ["safe_grep", "Grep"]
+
+  const toolExecuteAfter = async (
+    input: { tool: string; sessionID: string; callID: string },
+    output: { title: string; output: string; metadata: unknown }
+  ) => {
+    if (!GREP_TOOLS.includes(input.tool)) return
+
+    const { sessionID } = input
+
+    try {
+      const response = await ctx.client.session.messages({
+        path: { id: sessionID },
+      })
+
+      const messages = (response.data ?? response) as MessageWrapper[]
+
+      const assistantMessages = messages
+        .filter((m) => m.info.role === "assistant")
+        .map((m) => m.info as AssistantMessageInfo)
+
+      if (assistantMessages.length === 0) return
+
+      const totalInputTokens = assistantMessages.reduce((sum, m) => {
+        const inputTokens = m.tokens?.input ?? 0
+        const cacheReadTokens = m.tokens?.cache?.read ?? 0
+        return sum + inputTokens + cacheReadTokens
+      }, 0)
+
+      const remainingTokens = ANTHROPIC_ACTUAL_LIMIT - totalInputTokens
+
+      const maxOutputTokens = Math.min(
+        remainingTokens * 0.5,
+        TARGET_MAX_TOKENS
+      )
+
+      if (maxOutputTokens <= 0) {
+        output.output = "[Output suppressed - context window exhausted]"
+        return
+      }
+
+      const { result, truncated } = truncateToTokenLimit(output.output, maxOutputTokens)
+      if (truncated) {
+        output.output = result
+      }
+    } catch {
+      // Graceful degradation
+    }
+  }
+
+  return {
+    "tool.execute.after": toolExecuteAfter,
+  }
+}

src/hooks/index.ts

@@ -3,3 +3,5 @@ export { createContextWindowMonitorHook } from "./context-window-monitor"
 export { createSessionNotification } from "./session-notification"
 export { createSessionRecoveryHook } from "./session-recovery"
 export { createCommentCheckerHooks } from "./comment-checker"
+export { createGrepOutputTruncatorHook } from "./grep-output-truncator"
+export { createPulseMonitorHook } from "./pulse-monitor"

src/hooks/pulse-monitor.ts

@@ -0,0 +1,142 @@
+import type { PluginInput } from "@opencode-ai/plugin"
+
+export function createPulseMonitorHook(ctx: PluginInput) {
+  const STANDARD_TIMEOUT = 5 * 60 * 1000 // 5 minutes
+  const THINKING_TIMEOUT = 5 * 60 * 1000 // 5 minutes
+  const CHECK_INTERVAL = 5 * 1000 // 5 seconds
+  
+  let lastHeartbeat = Date.now()
+  let isMonitoring = false
+  let currentSessionID: string | null = null
+  let monitorTimer: ReturnType<typeof setInterval> | null = null
+  let isThinking = false
+  
+  const startMonitoring = (sessionID: string) => {
+    if (currentSessionID !== sessionID) {
+      currentSessionID = sessionID
+      // Reset thinking state when switching sessions or starting new
+      isThinking = false
+    }
+    
+    lastHeartbeat = Date.now()
+    
+    if (!isMonitoring) {
+      isMonitoring = true
+      if (monitorTimer) clearInterval(monitorTimer)
+      
+      monitorTimer = setInterval(async () => {
+        if (!isMonitoring || !currentSessionID) return
+        
+        const timeSinceLastHeartbeat = Date.now() - lastHeartbeat
+        const currentTimeout = isThinking ? THINKING_TIMEOUT : STANDARD_TIMEOUT
+        
+        if (timeSinceLastHeartbeat > currentTimeout) {
+          await recoverStalledSession(currentSessionID, timeSinceLastHeartbeat, isThinking)
+        }
+      }, CHECK_INTERVAL)
+    }
+  }
+  
+  const stopMonitoring = () => {
+    isMonitoring = false
+    if (monitorTimer) {
+      clearInterval(monitorTimer)
+      monitorTimer = null
+    }
+  }
+  
+  const updateHeartbeat = (isThinkingUpdate?: boolean) => {
+    if (isMonitoring) {
+      lastHeartbeat = Date.now()
+      if (isThinkingUpdate !== undefined) {
+        isThinking = isThinkingUpdate
+      }
+    }
+  }
+  
+  const recoverStalledSession = async (sessionID: string, stalledDuration: number, wasThinking: boolean) => {
+    stopMonitoring()
+    
+    try {
+      const durationSec = Math.round(stalledDuration/1000)
+      const typeStr = wasThinking ? "Thinking" : "Standard"
+      
+      // 1. Notify User
+      await ctx.client.tui.showToast({
+        body: {
+            title: "Pulse Monitor: Cardiac Arrest",
+            message: `Session stalled (${typeStr}) for ${durationSec}s. Defibrillating...`,
+            variant: "error",
+            duration: 5000
+        }
+      }).catch(() => {})
+      
+      // 2. Abort current generation (Defibrillation shock)
+      await ctx.client.session.abort({ path: { id: sessionID } }).catch(() => {})
+      
+      // 3. Wait a bit for state to settle
+      await new Promise(resolve => setTimeout(resolve, 1500))
+      
+      // 4. Prompt "continue" to kickstart (CPR)
+      await ctx.client.session.prompt({
+        path: { id: sessionID },
+        body: { parts: [{ type: "text", text: "The connection was unstable and stalled. Please continue from where you left off." }] },
+        query: { directory: ctx.directory }
+      })
+      
+      // Resume monitoring
+      startMonitoring(sessionID)
+      
+    } catch (err) {
+      console.error("[PulseMonitor] Recovery failed:", err)
+      // If recovery fails, we stop monitoring to avoid loops
+      stopMonitoring()
+    }
+  }
+
+  return {
+    event: async (input: { event: any }) => {
+      const { event } = input
+      const props = event.properties as Record<string, any> | undefined
+      
+      // Monitor both session updates and part updates to capture token flow
+      if (event.type === "session.updated" || event.type === "message.part.updated") {
+        // Try to get sessionID from various common locations
+        const sessionID = props?.info?.id || props?.sessionID
+        
+        if (sessionID) {
+            if (!isMonitoring) startMonitoring(sessionID)
+            
+            // Check for thinking indicators in the payload
+            let thinkingUpdate: boolean | undefined = undefined
+            
+            if (event.type === "message.part.updated") {
+                const part = props?.part
+                if (part) {
+                    const THINKING_TYPES = ["thinking", "redacted_thinking", "reasoning"]
+                    if (THINKING_TYPES.includes(part.type)) {
+                        thinkingUpdate = true
+                    } else if (part.type === "text" || part.type === "tool_use") {
+                        thinkingUpdate = false
+                    }
+                }
+            }
+            
+            updateHeartbeat(thinkingUpdate)
+        }
+      } else if (event.type === "session.idle" || event.type === "session.error" || event.type === "session.stopped") {
+        stopMonitoring()
+      }
+    },
+    "tool.execute.before": async () => {
+        // Pause monitoring while tool runs locally (tools can take time)
+        stopMonitoring()
+    },
+    "tool.execute.after": async (input: { sessionID: string }) => {
+        // Resume monitoring after tool finishes
+        if (input.sessionID) {
+            startMonitoring(input.sessionID)
+        }
+    }
+  }
+}

src/hooks/session-recovery.ts

@@ -12,14 +12,21 @@
  *    - Recovery: strip thinking/redacted_thinking blocks
  *
  * 4. Empty content message (non-empty content required)
- *    - Recovery: delete the empty message via revert
+ *    - Recovery: inject text part directly via filesystem
  */
 
+import { existsSync, mkdirSync, readdirSync, readFileSync, writeFileSync } from "node:fs"
+import { join } from "node:path"
+import { xdgData } from "xdg-basedir"
 import type { PluginInput } from "@opencode-ai/plugin"
 import type { createOpencodeClient } from "@opencode-ai/sdk"
 
 type Client = ReturnType<typeof createOpencodeClient>
 
+const OPENCODE_STORAGE = join(xdgData ?? "", "opencode", "storage")
+const MESSAGE_STORAGE = join(OPENCODE_STORAGE, "message")
+const PART_STORAGE = join(OPENCODE_STORAGE, "part")
+
 type RecoveryErrorType = "tool_result_missing" | "thinking_block_order" | "thinking_disabled_violation" | "empty_content_message" | null
 
 interface MessageInfo {
@@ -215,6 +222,140 @@ async function recoverThinkingDisabledViolation(
 }
 
 const THINKING_TYPES = new Set(["thinking", "redacted_thinking", "reasoning"])
+const META_TYPES = new Set(["step-start", "step-finish"])
+
+interface StoredMessageMeta {
+  id: string
+  sessionID: string
+  role: string
+  parentID?: string
+}
+
+interface StoredPart {
+  id: string
+  sessionID: string
+  messageID: string
+  type: string
+  text?: string
+}
+
+function generatePartId(): string {
+  const timestamp = Date.now().toString(16)
+  const random = Math.random().toString(36).substring(2, 10)
+  return `prt_${timestamp}${random}`
+}
+
+function getMessageDir(sessionID: string): string {
+  const projectHash = readdirSync(MESSAGE_STORAGE).find((dir) => {
+    const sessionDir = join(MESSAGE_STORAGE, dir)
+    try {
+      return readdirSync(sessionDir).some((f) => f.includes(sessionID.replace("ses_", "")))
+    } catch {
+      return false
+    }
+  })
+
+  if (projectHash) {
+    return join(MESSAGE_STORAGE, projectHash, sessionID)
+  }
+
+  for (const dir of readdirSync(MESSAGE_STORAGE)) {
+    const sessionPath = join(MESSAGE_STORAGE, dir, sessionID)
+    if (existsSync(sessionPath)) {
+      return sessionPath
+    }
+  }
+
+  return ""
+}
+
+function readMessagesFromStorage(sessionID: string): StoredMessageMeta[] {
+  const messageDir = getMessageDir(sessionID)
+  if (!messageDir || !existsSync(messageDir)) return []
+
+  const messages: StoredMessageMeta[] = []
+  for (const file of readdirSync(messageDir)) {
+    if (!file.endsWith(".json")) continue
+    try {
+      const content = readFileSync(join(messageDir, file), "utf-8")
+      messages.push(JSON.parse(content))
+    } catch {
+      continue
+    }
+  }
+
+  return messages.sort((a, b) => a.id.localeCompare(b.id))
+}
+
+function readPartsFromStorage(messageID: string): StoredPart[] {
+  const partDir = join(PART_STORAGE, messageID)
+  if (!existsSync(partDir)) return []
+
+  const parts: StoredPart[] = []
+  for (const file of readdirSync(partDir)) {
+    if (!file.endsWith(".json")) continue
+    try {
+      const content = readFileSync(join(partDir, file), "utf-8")
+      parts.push(JSON.parse(content))
+    } catch {
+      continue
+    }
+  }
+
+  return parts
+}
+
+function injectTextPartToStorage(sessionID: string, messageID: string, text: string): boolean {
+  const partDir = join(PART_STORAGE, messageID)
+
+  if (!existsSync(partDir)) {
+    mkdirSync(partDir, { recursive: true })
+  }
+
+  const partId = generatePartId()
+  const part: StoredPart = {
+    id: partId,
+    sessionID,
+    messageID,
+    type: "text",
+    text,
+  }
+
+  try {
+    writeFileSync(join(partDir, `${partId}.json`), JSON.stringify(part, null, 2))
+    return true
+  } catch {
+    return false
+  }
+}
+
+function findEmptyContentMessageFromStorage(sessionID: string): string | null {
+  const messages = readMessagesFromStorage(sessionID)
+
+  for (let i = 0; i < messages.length; i++) {
+    const msg = messages[i]
+    if (msg.role !== "assistant") continue
+
+    const isLastMessage = i === messages.length - 1
+    if (isLastMessage) continue
+
+    const parts = readPartsFromStorage(msg.id)
+    const hasContent = parts.some((p) => {
+      if (THINKING_TYPES.has(p.type)) return false
+      if (META_TYPES.has(p.type)) return false
+      if (p.type === "text" && p.text?.trim()) return true
+      if (p.type === "tool_use") return true
+      if (p.type === "tool_result") return true
+      return false
+    })
+
+    if (!hasContent && parts.length > 0) {
+      return msg.id
+    }
+  }
+
+  return null
+}
 
 function hasNonEmptyOutput(msg: MessageData): boolean {
   const parts = msg.parts
@@ -246,65 +387,15 @@ function findEmptyContentMessage(msgs: MessageData[]): MessageData | null {
 }
 
 async function recoverEmptyContentMessage(
-  client: Client,
+  _client: Client,
   sessionID: string,
   failedAssistantMsg: MessageData,
-  directory: string
+  _directory: string
 ): Promise<boolean> {
-  try {
-    const messagesResp = await client.session.messages({
-      path: { id: sessionID },
-      query: { directory },
-    })
-    const msgs = (messagesResp as { data?: MessageData[] }).data
+  const emptyMessageID = findEmptyContentMessageFromStorage(sessionID) || failedAssistantMsg.info?.id
+  if (!emptyMessageID) return false
 
-    if (!msgs || msgs.length === 0) return false
-
-    const emptyMsg = findEmptyContentMessage(msgs) || failedAssistantMsg
-    const messageID = emptyMsg.info?.id
-    if (!messageID) return false
-
-    const existingParts = emptyMsg.parts || []
-    const hasOnlyThinkingOrMeta = existingParts.length > 0 && existingParts.every(
-      (p) => THINKING_TYPES.has(p.type) || p.type === "step-start" || p.type === "step-finish"
-    )
-
-    if (hasOnlyThinkingOrMeta) {
-      const strippedParts: MessagePart[] = [{ type: "text", text: "(interrupted)" }]
-
-      try {
-        // @ts-expect-error - Experimental API
-        await client.message?.update?.({
-          path: { id: messageID },
-          body: { parts: strippedParts },
-        })
-        return true
-      } catch {
-        // message.update not available
-      }
-
-      try {
-        // @ts-expect-error - Experimental API
-        await client.session.patch?.({
-          path: { id: sessionID },
-          body: { messageID, parts: strippedParts },
-        })
-        return true
-      } catch {
-        // session.patch not available
-      }
-    }
-
-    const revertTargetID = emptyMsg.info?.parentID || messageID
-    await client.session.revert({
-      path: { id: sessionID },
-      body: { messageID: revertTargetID },
-      query: { directory },
-    })
-    return true
-  } catch {
-    return false
-  }
+  return injectTextPartToStorage(sessionID, emptyMessageID, "(interrupted)")
 }
 
 async function fallbackRevertStrategy(

src/hooks/todo-continuation-enforcer.ts

@@ -7,18 +7,13 @@ interface Todo {
   id: string
 }
 
-const CONTINUATION_PROMPT = `[SYSTEM REMINDER - TODO ENFORCEMENT]
+const CONTINUATION_PROMPT = `[SYSTEM REMINDER - TODO CONTINUATION]
 
-Your todo list is NOT complete. There are still incomplete tasks remaining.
+Incomplete tasks remain in your todo list. Continue working on the next pending task.
 
-CRITICAL INSTRUCTION:
-- You MUST NOT stop working until ALL todos are marked as completed
-- Continue working on the next pending task immediately
-- Work honestly and diligently to finish every task
-- Do NOT ask for permission to continue - just proceed with the work
-- Mark each task as completed as soon as you finish it
-
-Resume your work NOW.`
+- Proceed without asking for permission
+- Mark each task complete when finished
+- Do not stop until all tasks are done`
 
 function detectInterrupt(error: unknown): boolean {
   if (!error) return false
@@ -113,7 +108,7 @@ export function createTodoContinuationEnforcer(ctx: PluginInput) {
             parts: [
               {
                 type: "text",
-                text: `${CONTINUATION_PROMPT}\n\n[Status: ${incomplete.length}/${todos.length} tasks remaining]`,
+                text: `${CONTINUATION_PROMPT}\n\n[Status: ${todos.length - incomplete.length}/${todos.length} completed, ${incomplete.length} remaining]`,
               },
             ],
           },

src/index.ts

@@ -1,6 +1,6 @@
 import type { Plugin } from "@opencode-ai/plugin"
 import { createBuiltinAgents } from "./agents"
-import { createTodoContinuationEnforcer, createContextWindowMonitorHook, createSessionRecoveryHook, createCommentCheckerHooks } from "./hooks"
+import { createTodoContinuationEnforcer, createContextWindowMonitorHook, createSessionRecoveryHook, createCommentCheckerHooks, createGrepOutputTruncatorHook, createPulseMonitorHook } from "./hooks"
 import { updateTerminalTitle } from "./features/terminal"
 import { builtinTools } from "./tools"
 import { createBuiltinMcps } from "./mcp"
@@ -43,7 +43,9 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
   const todoContinuationEnforcer = createTodoContinuationEnforcer(ctx)
   const contextWindowMonitor = createContextWindowMonitorHook(ctx)
   const sessionRecovery = createSessionRecoveryHook(ctx)
+  const pulseMonitor = createPulseMonitorHook(ctx)
   const commentChecker = createCommentCheckerHooks()
+  const grepOutputTruncator = createGrepOutputTruncatorHook(ctx)
 
   updateTerminalTitle({ sessionId: "main" })
 
@@ -79,6 +81,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     event: async (input) => {
       await todoContinuationEnforcer(input)
       await contextWindowMonitor.event(input)
+      await pulseMonitor.event(input)
 
       const { event } = input
       const props = event.properties as Record<string, unknown> | undefined
@@ -171,6 +174,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "tool.execute.before": async (input, output) => {
+      await pulseMonitor["tool.execute.before"]()
       await commentChecker["tool.execute.before"](input, output)
 
       if (input.sessionID === mainSessionID) {
@@ -185,6 +189,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "tool.execute.after": async (input, output) => {
+      await pulseMonitor["tool.execute.after"](input)
+      await grepOutputTruncator["tool.execute.after"](input, output)
       await contextWindowMonitor["tool.execute.after"](input, output)
       await commentChecker["tool.execute.after"](input, output)
 

src/tools/ast-grep/cli.ts

@@ -1,8 +1,15 @@
 import { spawn } from "bun"
 import { existsSync } from "fs"
-import { getSgCliPath, setSgCliPath, findSgCliPathSync } from "./constants"
+import {
+  getSgCliPath,
+  setSgCliPath,
+  findSgCliPathSync,
+  DEFAULT_TIMEOUT_MS,
+  DEFAULT_MAX_OUTPUT_BYTES,
+  DEFAULT_MAX_MATCHES,
+} from "./constants"
 import { ensureAstGrepBinary } from "./downloader"
-import type { CliMatch, CliLanguage } from "./types"
+import type { CliMatch, CliLanguage, SgResult } from "./types"
 
 export interface RunOptions {
   pattern: string
@@ -54,26 +61,7 @@ export function startBackgroundInit(): void {
   }
 }
 
-interface SpawnResult {
-  stdout: string
-  stderr: string
-  exitCode: number
-}
-
-async function spawnSg(cliPath: string, args: string[]): Promise<SpawnResult> {
-  const proc = spawn([cliPath, ...args], {
-    stdout: "pipe",
-    stderr: "pipe",
-  })
-
-  const stdout = await new Response(proc.stdout).text()
-  const stderr = await new Response(proc.stderr).text()
-  const exitCode = await proc.exited
-
-  return { stdout, stderr, exitCode }
-}
-
-export async function runSg(options: RunOptions): Promise<CliMatch[]> {
+export async function runSg(options: RunOptions): Promise<SgResult> {
   const args = ["run", "-p", options.pattern, "--lang", options.lang, "--json=compact"]
 
   if (options.rewrite) {
@@ -105,55 +93,129 @@ export async function runSg(options: RunOptions): Promise<CliMatch[]> {
     }
   }
 
-  let result: SpawnResult
+  const timeout = DEFAULT_TIMEOUT_MS
+
+  const proc = spawn([cliPath, ...args], {
+    stdout: "pipe",
+    stderr: "pipe",
+  })
+
+  const timeoutPromise = new Promise<never>((_, reject) => {
+    const id = setTimeout(() => {
+      proc.kill()
+      reject(new Error(`Search timeout after ${timeout}ms`))
+    }, timeout)
+    proc.exited.then(() => clearTimeout(id))
+  })
+
+  let stdout: string
+  let stderr: string
+  let exitCode: number
+
   try {
-    result = await spawnSg(cliPath, args)
+    stdout = await Promise.race([new Response(proc.stdout).text(), timeoutPromise])
+    stderr = await new Response(proc.stderr).text()
+    exitCode = await proc.exited
   } catch (e) {
-    const error = e as NodeJS.ErrnoException
+    const error = e as Error
+    if (error.message?.includes("timeout")) {
+      return {
+        matches: [],
+        totalMatches: 0,
+        truncated: true,
+        truncatedReason: "timeout",
+        error: error.message,
+      }
+    }
+
+    const nodeError = e as NodeJS.ErrnoException
     if (
-      error.code === "ENOENT" ||
-      error.message?.includes("ENOENT") ||
-      error.message?.includes("not found")
+      nodeError.code === "ENOENT" ||
+      nodeError.message?.includes("ENOENT") ||
+      nodeError.message?.includes("not found")
     ) {
       const downloadedPath = await ensureAstGrepBinary()
       if (downloadedPath) {
         resolvedCliPath = downloadedPath
         setSgCliPath(downloadedPath)
-        result = await spawnSg(downloadedPath, args)
+        return runSg(options)
       } else {
-        throw new Error(
-          `ast-grep CLI binary not found.\n\n` +
+        return {
+          matches: [],
+          totalMatches: 0,
+          truncated: false,
+          error:
+            `ast-grep CLI binary not found.\n\n` +
             `Auto-download failed. Manual install options:\n` +
             `  bun add -D @ast-grep/cli\n` +
             `  cargo install ast-grep --locked\n` +
-            `  brew install ast-grep`
-        )
+            `  brew install ast-grep`,
+        }
       }
-    } else {
-      throw new Error(`Failed to spawn ast-grep: ${error.message}`)
+    }
+
+    return {
+      matches: [],
+      totalMatches: 0,
+      truncated: false,
+      error: `Failed to spawn ast-grep: ${error.message}`,
     }
   }
 
-  const { stdout, stderr, exitCode } = result
-
   if (exitCode !== 0 && stdout.trim() === "") {
     if (stderr.includes("No files found")) {
-      return []
+      return { matches: [], totalMatches: 0, truncated: false }
     }
     if (stderr.trim()) {
-      throw new Error(stderr.trim())
+      return { matches: [], totalMatches: 0, truncated: false, error: stderr.trim() }
     }
-    return []
+    return { matches: [], totalMatches: 0, truncated: false }
   }
 
   if (!stdout.trim()) {
-    return []
+    return { matches: [], totalMatches: 0, truncated: false }
   }
 
+  const outputTruncated = stdout.length >= DEFAULT_MAX_OUTPUT_BYTES
+  const outputToProcess = outputTruncated ? stdout.substring(0, DEFAULT_MAX_OUTPUT_BYTES) : stdout
+
+  let matches: CliMatch[] = []
   try {
-    return JSON.parse(stdout) as CliMatch[]
+    matches = JSON.parse(outputToProcess) as CliMatch[]
   } catch {
-    return []
+    if (outputTruncated) {
+      try {
+        const lastValidIndex = outputToProcess.lastIndexOf("}")
+        if (lastValidIndex > 0) {
+          const bracketIndex = outputToProcess.lastIndexOf("},", lastValidIndex)
+          if (bracketIndex > 0) {
+            const truncatedJson = outputToProcess.substring(0, bracketIndex + 1) + "]"
+            matches = JSON.parse(truncatedJson) as CliMatch[]
+          }
+        }
+      } catch {
+        return {
+          matches: [],
+          totalMatches: 0,
+          truncated: true,
+          truncatedReason: "max_output_bytes",
+          error: "Output too large and could not be parsed",
+        }
+      }
+    } else {
+      return { matches: [], totalMatches: 0, truncated: false }
+    }
+  }
+
+  const totalMatches = matches.length
+  const matchesTruncated = totalMatches > DEFAULT_MAX_MATCHES
+  const finalMatches = matchesTruncated ? matches.slice(0, DEFAULT_MAX_MATCHES) : matches
+
+  return {
+    matches: finalMatches,
+    totalMatches,
+    truncated: outputTruncated || matchesTruncated,
+    truncatedReason: outputTruncated ? "max_output_bytes" : matchesTruncated ? "max_matches" : undefined,
   }
 }
 

src/tools/ast-grep/constants.ts

@@ -1,10 +1,18 @@
 import { createRequire } from "module"
 import { dirname, join } from "path"
-import { existsSync } from "fs"
+import { existsSync, statSync } from "fs"
 import { getCachedBinaryPath } from "./downloader"
 
 type Platform = "darwin" | "linux" | "win32" | "unsupported"
 
+function isValidBinary(filePath: string): boolean {
+  try {
+    return statSync(filePath).size > 10000
+  } catch {
+    return false
+  }
+}
+
 function getPlatformPackageName(): string | null {
   const platform = process.platform as Platform
   const arch = process.arch
@@ -25,13 +33,18 @@ function getPlatformPackageName(): string | null {
 export function findSgCliPathSync(): string | null {
   const binaryName = process.platform === "win32" ? "sg.exe" : "sg"
 
+  const cachedPath = getCachedBinaryPath()
+  if (cachedPath && isValidBinary(cachedPath)) {
+    return cachedPath
+  }
+
   try {
     const require = createRequire(import.meta.url)
     const cliPkgPath = require.resolve("@ast-grep/cli/package.json")
     const cliDir = dirname(cliPkgPath)
     const sgPath = join(cliDir, binaryName)
 
-    if (existsSync(sgPath)) {
+    if (existsSync(sgPath) && isValidBinary(sgPath)) {
       return sgPath
     }
   } catch {
@@ -47,7 +60,7 @@ export function findSgCliPathSync(): string | null {
       const astGrepName = process.platform === "win32" ? "ast-grep.exe" : "ast-grep"
       const binaryPath = join(pkgDir, astGrepName)
 
-      if (existsSync(binaryPath)) {
+      if (existsSync(binaryPath) && isValidBinary(binaryPath)) {
         return binaryPath
       }
     } catch {
@@ -58,17 +71,12 @@ export function findSgCliPathSync(): string | null {
   if (process.platform === "darwin") {
     const homebrewPaths = ["/opt/homebrew/bin/sg", "/usr/local/bin/sg"]
     for (const path of homebrewPaths) {
-      if (existsSync(path)) {
+      if (existsSync(path) && isValidBinary(path)) {
         return path
       }
     }
   }
 
-  const cachedPath = getCachedBinaryPath()
-  if (cachedPath) {
-    return cachedPath
-  }
-
   return null
 }
 
@@ -127,6 +135,10 @@ export const CLI_LANGUAGES = [
 export const NAPI_LANGUAGES = ["html", "javascript", "tsx", "css", "typescript"] as const
 
 // Language to file extensions mapping
+export const DEFAULT_TIMEOUT_MS = 300_000
+export const DEFAULT_MAX_OUTPUT_BYTES = 1 * 1024 * 1024
+export const DEFAULT_MAX_MATCHES = 500
+
 export const LANG_EXTENSIONS: Record<string, string[]> = {
   bash: [".bash", ".sh", ".zsh", ".bats"],
   c: [".c", ".h"],

src/tools/ast-grep/tools.ts

@@ -15,10 +15,12 @@ function getEmptyResultHint(pattern: string, lang: CliLanguage): string | null {
 
   if (lang === "python") {
     if (src.startsWith("class ") && src.endsWith(":")) {
-      return `💡 Hint: Python class patterns need body. Try "class $NAME" or include body with $$$BODY`
+      const withoutColon = src.slice(0, -1)
+      return `💡 Hint: Remove trailing colon. Try: "${withoutColon}"`
     }
     if ((src.startsWith("def ") || src.startsWith("async def ")) && src.endsWith(":")) {
-      return `💡 Hint: Python function patterns need body. Try "def $FUNC($$$):\\n    $$$BODY"`
+      const withoutColon = src.slice(0, -1)
+      return `💡 Hint: Remove trailing colon. Try: "${withoutColon}"`
     }
   }
 
@@ -47,7 +49,7 @@ export const ast_grep_search = tool({
   },
   execute: async (args, context) => {
     try {
-      const matches = await runSg({
+      const result = await runSg({
         pattern: args.pattern,
         lang: args.lang as CliLanguage,
         paths: args.paths,
@@ -55,9 +57,9 @@ export const ast_grep_search = tool({
         context: args.context,
       })
 
-      let output = formatSearchResult(matches)
+      let output = formatSearchResult(result)
 
-      if (matches.length === 0) {
+      if (result.matches.length === 0 && !result.error) {
         const hint = getEmptyResultHint(args.pattern, args.lang as CliLanguage)
         if (hint) {
           output += `\n\n${hint}`
@@ -89,7 +91,7 @@ export const ast_grep_replace = tool({
   },
   execute: async (args, context) => {
     try {
-      const matches = await runSg({
+      const result = await runSg({
         pattern: args.pattern,
         rewrite: args.rewrite,
         lang: args.lang as CliLanguage,
@@ -97,7 +99,7 @@ export const ast_grep_replace = tool({
         globs: args.globs,
         updateAll: args.dryRun === false,
       })
-      const output = formatReplaceResult(matches, args.dryRun !== false)
+      const output = formatReplaceResult(result, args.dryRun !== false)
       showOutputToUser(context, output)
       return output
     } catch (e) {

src/tools/ast-grep/types.ts

@@ -51,3 +51,11 @@ export interface TransformResult {
   transformed: string
   editCount: number
 }
+
+export interface SgResult {
+  matches: CliMatch[]
+  totalMatches: number
+  truncated: boolean
+  truncatedReason?: "max_matches" | "max_output_bytes" | "timeout"
+  error?: string
+}

src/tools/ast-grep/utils.ts

@@ -1,13 +1,28 @@
-import type { CliMatch, AnalyzeResult } from "./types"
+import type { CliMatch, AnalyzeResult, SgResult } from "./types"
 
-export function formatSearchResult(matches: CliMatch[]): string {
-  if (matches.length === 0) {
+export function formatSearchResult(result: SgResult): string {
+  if (result.error) {
+    return `Error: ${result.error}`
+  }
+
+  if (result.matches.length === 0) {
     return "No matches found"
   }
 
-  const lines: string[] = [`Found ${matches.length} match(es):\n`]
+  const lines: string[] = []
 
-  for (const match of matches) {
+  if (result.truncated) {
+    const reason = result.truncatedReason === "max_matches"
+      ? `showing first ${result.matches.length} of ${result.totalMatches}`
+      : result.truncatedReason === "max_output_bytes"
+      ? "output exceeded 1MB limit"
+      : "search timed out"
+    lines.push(`⚠️ Results truncated (${reason})\n`)
+  }
+
+  lines.push(`Found ${result.matches.length} match(es)${result.truncated ? ` (truncated from ${result.totalMatches})` : ""}:\n`)
+
+  for (const match of result.matches) {
     const loc = `${match.file}:${match.range.start.line + 1}:${match.range.start.column + 1}`
     lines.push(`${loc}`)
     lines.push(`  ${match.lines.trim()}`)
@@ -17,15 +32,30 @@ export function formatSearchResult(matches: CliMatch[]): string {
   return lines.join("\n")
 }
 
-export function formatReplaceResult(matches: CliMatch[], isDryRun: boolean): string {
-  if (matches.length === 0) {
+export function formatReplaceResult(result: SgResult, isDryRun: boolean): string {
+  if (result.error) {
+    return `Error: ${result.error}`
+  }
+
+  if (result.matches.length === 0) {
     return "No matches found to replace"
   }
 
   const prefix = isDryRun ? "[DRY RUN] " : ""
-  const lines: string[] = [`${prefix}${matches.length} replacement(s):\n`]
+  const lines: string[] = []
 
-  for (const match of matches) {
+  if (result.truncated) {
+    const reason = result.truncatedReason === "max_matches"
+      ? `showing first ${result.matches.length} of ${result.totalMatches}`
+      : result.truncatedReason === "max_output_bytes"
+      ? "output exceeded 1MB limit"
+      : "search timed out"
+    lines.push(`⚠️ Results truncated (${reason})\n`)
+  }
+
+  lines.push(`${prefix}${result.matches.length} replacement(s):\n`)
+
+  for (const match of result.matches) {
     const loc = `${match.file}:${match.range.start.line + 1}:${match.range.start.column + 1}`
     lines.push(`${loc}`)
     lines.push(`  ${match.text}`)

src/tools/lsp/client.ts

@@ -3,6 +3,7 @@ import { readFileSync } from "fs"
 import { extname, resolve } from "path"
 import type { ResolvedServer } from "./config"
 import { getLanguageId } from "./config"
+import type { Diagnostic } from "./types"
 
 interface ManagedClient {
   client: LSPClient
@@ -155,6 +156,7 @@ export class LSPClient {
   private openedFiles = new Set<string>()
   private stderrBuffer: string[] = []
   private processExited = false
+  private diagnosticsStore = new Map<string, Diagnostic[]>()
 
   constructor(
     private root: string,
@@ -290,7 +292,11 @@ export class LSPClient {
       try {
         const msg = JSON.parse(content)
 
-        if ("id" in msg && "method" in msg) {
+        if ("method" in msg && !("id" in msg)) {
+          if (msg.method === "textDocument/publishDiagnostics" && msg.params?.uri) {
+            this.diagnosticsStore.set(msg.params.uri, msg.params.diagnostics ?? [])
+          }
+        } else if ("id" in msg && "method" in msg) {
           this.handleServerRequest(msg.id, msg.method, msg.params)
         } else if ("id" in msg && this.pending.has(msg.id)) {
           const handler = this.pending.get(msg.id)!
@@ -347,9 +353,14 @@ export class LSPClient {
     this.proc.stdin.write(`Content-Length: ${Buffer.byteLength(msg)}\r\n\r\n${msg}`)
   }
 
-  private handleServerRequest(id: number | string, method: string, _params?: unknown): void {
+  private handleServerRequest(id: number | string, method: string, params?: unknown): void {
     if (method === "workspace/configuration") {
-      this.respond(id, [{}])
+      const items = (params as { items?: Array<{ section?: string }> })?.items ?? []
+      const result = items.map((item) => {
+        if (item.section === "json") return { validate: { enable: true } }
+        return {}
+      })
+      this.respond(id, result)
     } else if (method === "client/registerCapability") {
       this.respond(id, null)
     } else if (method === "window/workDoneProgress/create") {
@@ -412,7 +423,9 @@ export class LSPClient {
       ...this.server.initialization,
     })
     this.notify("initialized")
-    this.notify("workspace/didChangeConfiguration", { settings: {} })
+    this.notify("workspace/didChangeConfiguration", {
+      settings: { json: { validate: { enable: true } } },
+    })
     await new Promise((r) => setTimeout(r, 300))
   }
 
@@ -477,13 +490,23 @@ export class LSPClient {
     return this.send("workspace/symbol", { query })
   }
 
-  async diagnostics(filePath: string): Promise<unknown> {
+  async diagnostics(filePath: string): Promise<{ items: Diagnostic[] }> {
     const absPath = resolve(filePath)
+    const uri = `file://${absPath}`
     await this.openFile(absPath)
     await new Promise((r) => setTimeout(r, 500))
-    return this.send("textDocument/diagnostic", {
-      textDocument: { uri: `file://${absPath}` },
-    })
+
+    try {
+      const result = await this.send("textDocument/diagnostic", {
+        textDocument: { uri },
+      })
+      if (result && typeof result === "object" && "items" in result) {
+        return result as { items: Diagnostic[] }
+      }
+    } catch {
+    }
+
+    return { items: this.diagnosticsStore.get(uri) ?? [] }
   }
 
   async prepareRename(filePath: string, line: number, character: number): Promise<unknown> {
@@ -545,5 +568,6 @@ export class LSPClient {
     this.proc?.kill()
     this.proc = null
     this.processExited = true
+    this.diagnosticsStore.clear()
   }
 }

src/tools/lsp/constants.ts

@@ -36,6 +36,10 @@ export const SEVERITY_MAP: Record<number, string> = {
   4: "hint",
 }
 
+export const DEFAULT_MAX_REFERENCES = 200
+export const DEFAULT_MAX_SYMBOLS = 200
+export const DEFAULT_MAX_DIAGNOSTICS = 200
+
 export const BUILTIN_SERVERS: Record<string, Omit<LSPServerConfig, "id">> = {
   typescript: {
     command: ["typescript-language-server", "--stdio"],
@@ -171,4 +175,18 @@ export const EXT_TO_LANG: Record<string, string> = {
   ".astro": "astro",
   ".yaml": "yaml",
   ".yml": "yaml",
+  ".json": "json",
+  ".jsonc": "jsonc",
+  ".html": "html",
+  ".htm": "html",
+  ".css": "css",
+  ".scss": "scss",
+  ".less": "less",
+  ".sh": "shellscript",
+  ".bash": "shellscript",
+  ".zsh": "shellscript",
+  ".fish": "fish",
+  ".md": "markdown",
+  ".tf": "terraform",
+  ".tfvars": "terraform",
 }

src/tools/lsp/tools.ts

@@ -1,5 +1,10 @@
 import { tool } from "@opencode-ai/plugin/tool"
 import { getAllServers } from "./config"
+import {
+  DEFAULT_MAX_REFERENCES,
+  DEFAULT_MAX_SYMBOLS,
+  DEFAULT_MAX_DIAGNOSTICS,
+} from "./constants"
 import {
   withLspClient,
   formatHoverResult,
@@ -112,7 +117,14 @@ export const lsp_find_references = tool({
         return output
       }
 
-      const output = result.map(formatLocation).join("\n")
+      const total = result.length
+      const truncated = total > DEFAULT_MAX_REFERENCES
+      const limited = truncated ? result.slice(0, DEFAULT_MAX_REFERENCES) : result
+      const lines = limited.map(formatLocation)
+      if (truncated) {
+        lines.unshift(`Found ${total} references (showing first ${DEFAULT_MAX_REFERENCES}):`)
+      }
+      const output = lines.join("\n")
       return output
     } catch (e) {
       const output = `Error: ${e instanceof Error ? e.message : String(e)}`
@@ -138,13 +150,21 @@ export const lsp_document_symbols = tool({
         return output
       }
 
-      let output: string
-      if ("range" in result[0]) {
-        output = (result as DocumentSymbol[]).map((s) => formatDocumentSymbol(s)).join("\n")
-      } else {
-        output = (result as SymbolInfo[]).map(formatSymbolInfo).join("\n")
+      const total = result.length
+      const truncated = total > DEFAULT_MAX_SYMBOLS
+      const limited = truncated ? result.slice(0, DEFAULT_MAX_SYMBOLS) : result
+
+      const lines: string[] = []
+      if (truncated) {
+        lines.push(`Found ${total} symbols (showing first ${DEFAULT_MAX_SYMBOLS}):`)
       }
-      return output
+
+      if ("range" in limited[0]) {
+        lines.push(...(limited as DocumentSymbol[]).map((s) => formatDocumentSymbol(s)))
+      } else {
+        lines.push(...(limited as SymbolInfo[]).map(formatSymbolInfo))
+      }
+      return lines.join("\n")
     } catch (e) {
       const output = `Error: ${e instanceof Error ? e.message : String(e)}`
       return output
@@ -171,8 +191,15 @@ export const lsp_workspace_symbols = tool({
         return output
       }
 
-      const limited = args.limit ? result.slice(0, args.limit) : result
-      const output = limited.map(formatSymbolInfo).join("\n")
+      const total = result.length
+      const limit = Math.min(args.limit ?? DEFAULT_MAX_SYMBOLS, DEFAULT_MAX_SYMBOLS)
+      const truncated = total > limit
+      const limited = result.slice(0, limit)
+      const lines = limited.map(formatSymbolInfo)
+      if (truncated) {
+        lines.unshift(`Found ${total} symbols (showing first ${limit}):`)
+      }
+      const output = lines.join("\n")
       return output
     } catch (e) {
       const output = `Error: ${e instanceof Error ? e.message : String(e)}`
@@ -213,7 +240,14 @@ export const lsp_diagnostics = tool({
         return output
       }
 
-      const output = diagnostics.map(formatDiagnostic).join("\n")
+      const total = diagnostics.length
+      const truncated = total > DEFAULT_MAX_DIAGNOSTICS
+      const limited = truncated ? diagnostics.slice(0, DEFAULT_MAX_DIAGNOSTICS) : diagnostics
+      const lines = limited.map(formatDiagnostic)
+      if (truncated) {
+        lines.unshift(`Found ${total} diagnostics (showing first ${DEFAULT_MAX_DIAGNOSTICS}):`)
+      }
+      const output = lines.join("\n")
       return output
     } catch (e) {
       const output = `Error: ${e instanceof Error ? e.message : String(e)}`

src/tools/lsp/utils.ts

@@ -12,6 +12,7 @@ import type {
   Diagnostic,
   PrepareRenameResult,
   PrepareRenameDefaultBehavior,
+  Range,
   WorkspaceEdit,
   TextEdit,
   CodeAction,
@@ -165,21 +166,35 @@ export function filterDiagnosticsBySeverity(
 }
 
 export function formatPrepareRenameResult(
-  result: PrepareRenameResult | PrepareRenameDefaultBehavior | null
+  result: PrepareRenameResult | PrepareRenameDefaultBehavior | Range | null
 ): string {
   if (!result) return "Cannot rename at this position"
 
+  // Case 1: { defaultBehavior: boolean }
   if ("defaultBehavior" in result) {
     return result.defaultBehavior ? "Rename supported (using default behavior)" : "Cannot rename at this position"
   }
 
-  const startLine = result.range.start.line + 1
-  const startChar = result.range.start.character
-  const endLine = result.range.end.line + 1
-  const endChar = result.range.end.character
-  const placeholder = result.placeholder ? ` (current: "${result.placeholder}")` : ""
+  // Case 2: { range: Range, placeholder?: string }
+  if ("range" in result && result.range) {
+    const startLine = result.range.start.line + 1
+    const startChar = result.range.start.character
+    const endLine = result.range.end.line + 1
+    const endChar = result.range.end.character
+    const placeholder = result.placeholder ? ` (current: "${result.placeholder}")` : ""
+    return `Rename available at ${startLine}:${startChar}-${endLine}:${endChar}${placeholder}`
+  }
 
-  return `Rename available at ${startLine}:${startChar}-${endLine}:${endChar}${placeholder}`
+  // Case 3: Range directly (has start/end but no range property)
+  if ("start" in result && "end" in result) {
+    const startLine = result.start.line + 1
+    const startChar = result.start.character
+    const endLine = result.end.line + 1
+    const endChar = result.end.character
+    return `Rename available at ${startLine}:${startChar}-${endLine}:${endChar}`
+  }
+
+  return "Cannot rename at this position"
 }
 
 export function formatTextEdit(edit: TextEdit): string {