chore: initialize qiming workspace repository

qimingcode/packages/opencode/src/acp/README.md

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+# ACP (Agent Client Protocol) Implementation
+
+This directory contains a clean, protocol-compliant implementation of the [Agent Client Protocol](https://agentclientprotocol.com/) for opencode.
+
+## Architecture
+
+The implementation follows a clean separation of concerns:
+
+### Core Components
+
+- **`agent.ts`** - Implements the `Agent` interface from `@agentclientprotocol/sdk`
+  - Handles initialization and capability negotiation
+  - Manages session lifecycle (`session/new`, `session/load`)
+  - Processes prompts and returns responses
+  - Properly implements ACP protocol v1
+
+- **`client.ts`** - Implements the `Client` interface for client-side capabilities
+  - File operations (`readTextFile`, `writeTextFile`)
+  - Permission requests (auto-approves for now)
+  - Terminal support (stub implementation)
+
+- **`session.ts`** - Session state management
+  - Creates and tracks ACP sessions
+  - Maps ACP sessions to internal opencode sessions
+  - Maintains working directory context
+  - Handles MCP server configurations
+
+- **`server.ts`** - ACP server startup and lifecycle
+  - Sets up JSON-RPC over stdio using the official library
+  - Manages graceful shutdown on SIGTERM/SIGINT
+  - Provides Instance context for the agent
+
+- **`types.ts`** - Type definitions for internal use
+
+## Usage
+
+### Command Line
+
+```bash
+# Start the ACP server in the current directory
+opencode acp
+
+# Start in a specific directory
+opencode acp --cwd /path/to/project
+```
+
+### Question Tool Opt-In
+
+ACP excludes `QuestionTool` by default.
+
+```bash
+OPENCODE_ENABLE_QUESTION_TOOL=1 opencode acp
+```
+
+Enable this only for ACP clients that support interactive question prompts.
+
+### Programmatic
+
+```typescript
+import { ACPServer } from "./acp/server"
+
+await ACPServer.start()
+```
+
+### Integration with Zed
+
+Add to your Zed configuration (`~/.config/zed/settings.json`):
+
+```json
+{
+  "agent_servers": {
+    "OpenCode": {
+      "command": "opencode",
+      "args": ["acp"]
+    }
+  }
+}
+```
+
+## Protocol Compliance
+
+This implementation follows the ACP specification v1:
+
+✅ **Initialization**
+
+- Proper `initialize` request/response with protocol version negotiation
+- Capability advertisement (`agentCapabilities`)
+- Authentication support (stub)
+
+✅ **Session Management**
+
+- `session/new` - Create new conversation sessions
+- `session/load` - Resume existing sessions (basic support)
+- Working directory context (`cwd`)
+- MCP server configuration support
+
+✅ **Prompting**
+
+- `session/prompt` - Process user messages
+- Content block handling (text, resources)
+- Response with stop reasons
+
+✅ **Client Capabilities**
+
+- File read/write operations
+- Permission requests
+- Terminal support (stub for future)
+
+## Current Limitations
+
+### Not Yet Implemented
+
+1. **Streaming Responses** - Currently returns complete responses instead of streaming via `session/update` notifications
+2. **Tool Call Reporting** - Doesn't report tool execution progress
+3. **Session Modes** - No mode switching support yet
+4. **Authentication** - No actual auth implementation
+5. **Terminal Support** - Placeholder only
+6. **Session Persistence** - `session/load` doesn't restore actual conversation history
+
+### Future Enhancements
+
+- **Real-time Streaming**: Implement `session/update` notifications for progressive responses
+- **Tool Call Visibility**: Report tool executions as they happen
+- **Session Persistence**: Save and restore full conversation history
+- **Mode Support**: Implement different operational modes (ask, code, etc.)
+- **Enhanced Permissions**: More sophisticated permission handling
+- **Terminal Integration**: Full terminal support via opencode's bash tool
+
+## Testing
+
+```bash
+# Run ACP tests
+bun test test/acp.test.ts
+
+# Test manually with stdio
+echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":1}}' | opencode acp
+```
+
+## Design Decisions
+
+### Why the Official Library?
+
+We use `@agentclientprotocol/sdk` instead of implementing JSON-RPC ourselves because:
+
+- Ensures protocol compliance
+- Handles edge cases and future protocol versions
+- Reduces maintenance burden
+- Works with other ACP clients automatically
+
+### Clean Architecture
+
+Each component has a single responsibility:
+
+- **Agent** = Protocol interface
+- **Client** = Client-side operations
+- **Session** = State management
+- **Server** = Lifecycle and I/O
+
+This makes the codebase maintainable and testable.
+
+### Mapping to OpenCode
+
+ACP sessions map cleanly to opencode's internal session model:
+
+- ACP `session/new` → creates internal Session
+- ACP `session/prompt` → uses SessionPrompt.prompt()
+- Working directory context preserved per-session
+- Tool execution uses existing ToolRegistry
+
+## References
+
+- [ACP Specification](https://agentclientprotocol.com/)
+- [TypeScript Library](https://github.com/agentclientprotocol/typescript-sdk)
+- [Protocol Examples](https://github.com/agentclientprotocol/typescript-sdk/tree/main/src/examples)

qimingcode/packages/opencode/src/acp/session.ts

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+import { RequestError, type McpServer } from "@agentclientprotocol/sdk"
+import type { ACPSessionState } from "./types"
+import { Log } from "@/util"
+import type { OpencodeClient } from "@opencode-ai/sdk/v2"
+
+const log = Log.create({ service: "acp-session-manager" })
+
+export class ACPSessionManager {
+  private sessions = new Map<string, ACPSessionState>()
+  private sdk: OpencodeClient
+
+  constructor(sdk: OpencodeClient) {
+    this.sdk = sdk
+  }
+
+  tryGet(sessionId: string): ACPSessionState | undefined {
+    return this.sessions.get(sessionId)
+  }
+
+  /**
+   * 创建 ACP 侧会话镜像，并可选保存客户端在 `session/new` 里通过 `_meta.systemPrompt` 传入的自定义系统提示。
+   * 该字段不会写入 OpenCode session 实体，仅在 ACP 桥接层保留，供后续 `sdk.session.prompt` 注入 `system`。
+   */
+  async create(
+    cwd: string,
+    mcpServers: McpServer[],
+    model?: ACPSessionState["model"],
+    systemPrompt?: ACPSessionState["systemPrompt"],
+  ): Promise<ACPSessionState> {
+    const session = await this.sdk.session
+      .create(
+        {
+          directory: cwd,
+        },
+        { throwOnError: true },
+      )
+      .then((x) => x.data!)
+
+    const sessionId = session.id
+    const resolvedModel = model
+
+    const state: ACPSessionState = {
+      id: sessionId,
+      cwd,
+      mcpServers,
+      createdAt: new Date(),
+      model: resolvedModel,
+      systemPrompt,
+    }
+    log.info("creating_session", {
+      sessionId,
+      hasSystemPrompt: systemPrompt !== undefined,
+    })
+
+    this.sessions.set(sessionId, state)
+    return state
+  }
+
+  async load(
+    sessionId: string,
+    cwd: string,
+    mcpServers: McpServer[],
+    model?: ACPSessionState["model"],
+  ): Promise<ACPSessionState> {
+    const session = await this.sdk.session
+      .get(
+        {
+          sessionID: sessionId,
+          directory: cwd,
+        },
+        { throwOnError: true },
+      )
+      .then((x) => x.data!)
+
+    const resolvedModel = model
+
+    const state: ACPSessionState = {
+      id: sessionId,
+      cwd,
+      mcpServers,
+      createdAt: new Date(session.time.created),
+      model: resolvedModel,
+    }
+    log.info("loading_session", { state })
+
+    this.sessions.set(sessionId, state)
+    return state
+  }
+
+  get(sessionId: string): ACPSessionState {
+    const session = this.sessions.get(sessionId)
+    if (!session) {
+      log.error("session not found", { sessionId })
+      throw RequestError.invalidParams(JSON.stringify({ error: `Session not found: ${sessionId}` }))
+    }
+    return session
+  }
+
+  getModel(sessionId: string) {
+    const session = this.get(sessionId)
+    return session.model
+  }
+
+  setModel(sessionId: string, model: ACPSessionState["model"]) {
+    const session = this.get(sessionId)
+    session.model = model
+    this.sessions.set(sessionId, session)
+    return session
+  }
+
+  getVariant(sessionId: string) {
+    const session = this.get(sessionId)
+    return session.variant
+  }
+
+  setVariant(sessionId: string, variant?: string) {
+    const session = this.get(sessionId)
+    session.variant = variant
+    this.sessions.set(sessionId, session)
+    return session
+  }
+
+  setMode(sessionId: string, modeId: string) {
+    const session = this.get(sessionId)
+    session.modeId = modeId
+    this.sessions.set(sessionId, session)
+    return session
+  }
+}

qimingcode/packages/opencode/src/acp/types.ts

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+import type { McpServer } from "@agentclientprotocol/sdk"
+import type { OpencodeClient } from "@opencode-ai/sdk/v2"
+import type { ProviderID, ModelID } from "../provider/schema"
+
+/**
+ * ACP `session/new` 在 `params._meta.systemPrompt` 里下发的系统提示（与 claude-code-acp 等客户端约定一致）。
+ * - 字符串：作为本条会话每次 `prompt` 传给后端的 `system` 全文；
+ * - `{ append }`：仅追加片段，由 HTTP `session.prompt` 的 `system` 字段传入，在 LLM 层与 agent / provider 提示合并。
+ */
+export type ACPSystemPromptMeta = string | { append: string }
+
+export interface ACPSessionState {
+  id: string
+  cwd: string
+  mcpServers: McpServer[]
+  createdAt: Date
+  model?: {
+    providerID: ProviderID
+    modelID: ModelID
+  }
+  variant?: string
+  modeId?: string
+  /** 来自 `newSession` 的 `_meta.systemPrompt`，在每次非 slash-command 的 `prompt` 中映射为 SDK 的 `system` */
+  systemPrompt?: ACPSystemPromptMeta
+}
+
+export interface ACPConfig {
+  sdk: OpencodeClient
+  defaultModel?: {
+    providerID: ProviderID
+    modelID: ModelID
+  }
+}