esengine · 0x0101010 · Jun 3, 2026 · Jun 3, 2026 · Jun 5, 2026
@@ -0,0 +1,214 @@
+# Lark (飞书) Bot
+
+Reasonix can operate as a Lark bot, letting you interact with it through Lark
+chat — group conversations or direct messages. Responses stream progressively,
+tool approvals use interactive card buttons, and each chat maintains an isolated
+session.
+
+## Prerequisites
+
+- A **self-built** Lark/Feishu app with bot capability enabled
+- App credentials: `App ID` and `App Secret` from the [Feishu Developer Console](https://open.feishu.cn/app)
+
+## App Setup
+
+1. **Create a self-built app** at [open.feishu.cn](https://open.feishu.cn/app)
+2. Go to **Features → Bot** and enable the bot capability
+3. Go to **Permissions** and add:
+   - `im:message` (read messages)
+   - `im:message:send_as_bot` (send messages as bot)
+4. Go to **Events & Callbacks → Event Subscription**:
+   - Subscription mode: **Receive events through persistent connection** (使用长连接接收事件)
+   - Add event: `im.message.receive_v1` (receive messages)
+5. Go to **Version Management → Create version** and publish (requires admin approval)
+
+## Quick Start
+
+### 1. Set up credentials
+
+Add your credentials to the Reasonix credentials file at
+`~/Library/Application Support/reasonix/credentials` (macOS) or
+`~/.config/reasonix/credentials` (Linux):
+
+```
+LARK_APP_ID=cli_xxxx
+LARK_APP_SECRET=your_app_secret
+DEEPSEEK_API_KEY=sk-xxxx
+```
+
+Or export them as environment variables in your shell profile (`~/.zshrc`, `~/.bashrc`):
+
+```bash
+export LARK_APP_ID="cli_xxxx"
+export LARK_APP_SECRET="your_app_secret"
+```
+
+### 2. Configure `reasonix.toml`
+
+Add a `[lark]` section to your Reasonix config. The minimal config uses the
+Provider-style env var pattern:
+
+```toml
+# ~/Library/Application Support/reasonix/config.toml (macOS)
+# or ~/.config/reasonix/config.toml (Linux)
+
+[lark]
+app_id_env     = "LARK_APP_ID"
+app_secret_env = "LARK_APP_SECRET"
+```
+
+Alternatively, use `${VAR}` expansion:
+
+```toml
+[lark]
+app_id     = "${LARK_APP_ID}"
+app_secret = "${LARK_APP_SECRET}"
+```
+
+### 3. Start the bot
+
+```bash
+reasonix lark
+```
+
+You should see:
+
+```
+reasonix lark — connected to Lark bot
+lark bot ready
+```
+
+Now send a message to the bot in Lark — either in a group where the bot is a
+member, or via direct message by searching for the app name.
+
+## Configuration Reference
+
+All fields are optional except credentials. Defaults are shown in comments.
+
+```toml
+[lark]
+# ── Credentials (required) ──────────────────────────────────────
+# Env var style (recommended — matches Provider api_key_env pattern):
+app_id_env     = "LARK_APP_ID"
+app_secret_env = "LARK_APP_SECRET"
+
+# Direct style (supports ${VAR} expansion):
+# app_id     = "${LARK_APP_ID}"
+# app_secret = "${LARK_APP_SECRET}"
+
+# ── Session Management ──────────────────────────────────────────
+# session_ttl  = "1h"    # idle sessions expire after this duration
+# max_sessions = 50      # concurrent chat sessions, 0 = unlimited
+
+# ── Permissions ─────────────────────────────────────────────────
+# Per-context mode: "read-only" | "interactive" | "bypass"
+# group_permission = "read-only"    # groups: plan mode, no writes
+# dm_permission    = "interactive"  # DMs: prompt before writes
+
+# ── Message Policy ──────────────────────────────────────────────
+# require_mention       = false   # when true, only respond to @bot in groups
+# respond_to_mention_all = false   # when true, respond to @all mentions
+# allow_groups          = []      # group allowlist (empty = all)
+# allow_dms             = []      # DM user allowlist (empty = all)
+
+# ── Output Formatting ───────────────────────────────────────────
+# show_tool_progress  = false   # true = inline tool markers; false = summary at end
+# show_reasoning      = false   # include thinking/reasoning in output
+# max_response_length = 8000    # truncate responses exceeding this (chars)
+# approval_timeout    = "5m"    # auto-deny pending approvals after this
+```
+
+### Permission Modes
+
+| Mode | Behavior |
+|------|----------|
+| `read-only` | Bot runs in plan mode — it can read files and research, but cannot write or execute side-effecting commands |
+| `interactive` | Bot prompts for approval via interactive cards before executing write operations |
+| `bypass` | Bot auto-approves all tool calls without prompting (use with caution) |
+
+## Slash Commands
+
+In Lark chat, the bot responds to these slash commands:
+
+| Command | Description |
+|---------|-------------|
+| `/new` | Reset the session — starts a fresh conversation |
+| `/model <name>` | Switch to a different configured model (e.g., `/model deepseek-pro`) |
+
+## How It Works
+
+```
+User sends message in Lark
+        │
+        ▼
+Lark pushes event via WebSocket
+        │
+        ▼
+SDK Channel.OnMessage → session router
+        │
+        ▼
+control.Controller processes the turn
+        │
+        ▼
+Events stream back via ch.Stream()
+        │
+        ▼
+Model text → progressive Lark message
+Tool calls → accumulated silently
+        │
+        ▼
+TurnDone → tool summary + token count
+           sent as a markdown message
+```
+
+### Message Format
+
+Each turn produces up to two messages:
+
+1. **Streamed reply** — model text only, progressive
+2. **Tool summary** (markdown) — only if tools were used:
+
+   ```
+   **3 tool calls**
+   `read_file` ✅: main.go (2.1KB)
+   `grep` ✅: 15 matches
+   `bash` ✅: tests passed
+
+   11,750 tokens
+   ```
+
+### Approval Flow
+
+When the model needs to run a write operation:
+
+1. Current stream is closed
+2. An interactive card is sent with `[Allow]` `[Deny]` `[Always Allow]` buttons
+3. User clicks → approval handler resolves → new stream opens
+4. Clicking "Always Allow" persists the rule to your Reasonix config
+
+## Troubleshooting
+
+### Bot doesn't respond to messages
+
+1. Make sure the app is **published** (not just in development mode)
+2. Verify the bot is a member of the chat (group) or you're in a DM with the bot
+3. Check that `im.message.receive_v1` event subscription is added and event mode is "persistent connection"
+4. Check the terminal logs for any errors
+
+### Authentication fails
+
+1. Verify `DEEPSEEK_API_KEY` is set in `~/.env` or `credentials` file
+2. Run `reasonix setup` to reconfigure the model provider
+3. Check that your API key is not expired
+
+### Session feels slow on first message
+
+The first message in a chat creates a new controller via `boot.Build`, which
+loads config, tools, plugins, memory, and skills. This takes 2-5 seconds.
+Subsequent messages reuse the session and respond quickly.
+
+### Config section lost after `reasonix setup`
+
+Reasonix v1.0+ uses merge-on-save for existing config files. If your `[lark]`
+section disappears, make sure your Reasonix binary is up to date
+(`reasonix --version`).
@@ -31,6 +31,9 @@ require (
 	github.com/clipperhouse/displaywidth v0.11.0 // indirect
 	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/dlclark/regexp2/v2 v2.1.1 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/larksuite/oapi-sdk-go/v3 v3.9.4 // indirect
 	github.com/lucasb-eyer/go-colorful v1.4.0 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect

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@@ -39,14 +39,22 @@ github.com/clipperhouse/uax29/v2 v2.7.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJ
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-github.com/dlclark/regexp2/v2 v2.1.1 h1:LCUGyd9Wf+r+VVOl8Ny38JTpWJcAsdVnCIuhhtthmKw=
-github.com/dlclark/regexp2/v2 v2.1.1/go.mod h1:avUrQvPaLz2DrFNHJF0taWAFFX2C1GMSSoeiqFjcBmU=
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@@ -61,22 +69,49 @@ github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PK
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@@ -89,6 +89,9 @@ func Run(args []string, version string) int {
 	case "doctor":
 		configureCLIThemeFromConfigNoProbe()
 		return doctorCommand(rest, version)
+	case "lark":
+		configureCLIThemeFromConfigNoProbe()
+		return runLark(rest)
 	case "version", "--version", "-v":
 		fmt.Println("reasonix", version)
 		return 0