feat: add Matrix channel support

README.md

@@ -308,7 +308,7 @@ That's it! You have a working AI assistant in 2 minutes.
 
 ## 💬 Chat Apps
 
-Talk to your picoclaw through Telegram, Discord, WhatsApp, DingTalk, LINE, or WeCom
+Talk to your picoclaw through Telegram, Discord, WhatsApp, Matrix, QQ, DingTalk, LINE, or WeCom
 
 > **Note**: All webhook-based channels (LINE, WeCom, etc.) are served on a single shared Gateway HTTP server (`gateway.host`:`gateway.port`, default `127.0.0.1:18790`). There are no per-channel ports to configure. Note: Feishu uses WebSocket/SDK mode and does not use the shared HTTP webhook server.
 
@@ -317,6 +317,7 @@ Talk to your picoclaw through Telegram, Discord, WhatsApp, DingTalk, LINE, or We
 | **Telegram** | Easy (just a token)                |
 | **Discord**  | Easy (bot token + intents)         |
 | **WhatsApp** | Easy (native: QR scan; or bridge URL) |
+| **Matrix**   | Medium (homeserver + bot access token) |
 | **QQ**       | Easy (AppID + AppSecret)           |
 | **DingTalk** | Medium (app credentials)           |
 | **LINE**     | Medium (credentials + webhook URL) |
@@ -528,6 +529,40 @@ picoclaw gateway
 ```
 </details>
 
+<details>
+<summary><b>Matrix</b></summary>
+
+**1. Prepare bot account**
+
+* Use your preferred homeserver (e.g. `https://matrix.org` or self-hosted)
+* Create a bot user and obtain its access token
+
+**2. Configure**
+
+```json
+{
+  "channels": {
+    "matrix": {
+      "enabled": true,
+      "homeserver": "https://matrix.org",
+      "user_id": "@your-bot:matrix.org",
+      "access_token": "YOUR_MATRIX_ACCESS_TOKEN",
+      "allow_from": []
+    }
+  }
+}
+```
+
+**3. Run**
+
+```bash
+picoclaw gateway
+```
+
+For full options (`device_id`, `join_on_invite`, `group_trigger`, `placeholder`, `reasoning_channel_id`), see [Matrix Channel Configuration Guide](docs/channels/matrix/README.md).
+
+</details>
+
 <details>
 <summary><b>LINE</b></summary>
 

README.zh.md

@@ -299,6 +299,7 @@ PicoClaw 支持多种聊天平台，使您的 Agent 能够连接到任何地方
 | **Telegram**         | ⭐ 简单     | 推荐，支持语音转文字，长轮询无需公网      | [查看文档](docs/channels/telegram/README.zh.md)                                                                 |
 | **Discord**          | ⭐ 简单     | Socket Mode，支持群组/私信，Bot 生态成熟  | [查看文档](docs/channels/discord/README.zh.md)                                                                  |
 | **Slack**            | ⭐ 简单     | **Socket Mode** (无需公网 IP)，企业级支持 | [查看文档](docs/channels/slack/README.zh.md)                                                                    |
+| **Matrix**           | ⭐⭐ 中等   | 联邦协议，支持自建 homeserver 与公开服务器 | [查看文档](docs/channels/matrix/README.zh.md)                                                                  |
 | **QQ**               | ⭐⭐ 中等   | 官方机器人 API，适合国内社群              | [查看文档](docs/channels/qq/README.zh.md)                                                                       |
 | **钉钉 (DingTalk)**  | ⭐⭐ 中等   | Stream 模式无需公网，企业办公首选         | [查看文档](docs/channels/dingtalk/README.zh.md)                                                                 |
 | **企业微信 (WeCom)** | ⭐⭐⭐ 较难 | 支持群机器人(Webhook)、自建应用(API)和智能机器人(AI Bot) | [Bot 文档](docs/channels/wecom/wecom_bot/README.zh.md) / [App 文档](docs/channels/wecom/wecom_app/README.zh.md) / [AI Bot 文档](docs/channels/wecom/wecom_aibot/README.zh.md) |

cmd/picoclaw-launcher-tui/internal/ui/app.go

@@ -423,7 +423,7 @@ func (s *appState) hasEnabledChannel() bool {
 	c := s.config.Channels
 	return c.Telegram.Enabled || c.Discord.Enabled || c.QQ.Enabled || c.MaixCam.Enabled ||
 		c.WhatsApp.Enabled || c.Feishu.Enabled || c.DingTalk.Enabled || c.Slack.Enabled ||
-		c.LINE.Enabled || c.OneBot.Enabled || c.WeCom.Enabled || c.WeComApp.Enabled
+		c.Matrix.Enabled || c.LINE.Enabled || c.OneBot.Enabled || c.WeCom.Enabled || c.WeComApp.Enabled
 }
 
 func (s *appState) confirmApplyOrDiscard(onApply func(), onDiscard func()) {

cmd/picoclaw-launcher-tui/internal/ui/channel.go

@@ -61,6 +61,12 @@ func (s *appState) buildChannelMenuItems() []MenuItem {
 			s.config.Channels.Slack.Enabled,
 			func() { s.push("channel-slack", s.slackForm()) },
 		),
+		channelItem(
+			"Matrix",
+			"Matrix bot settings",
+			s.config.Channels.Matrix.Enabled,
+			func() { s.push("channel-matrix", s.matrixForm()) },
+		),
 		channelItem(
 			"LINE",
 			"LINE bot settings",
@@ -233,6 +239,28 @@ func (s *appState) lineForm() tview.Primitive {
 	return wrapWithBack(form, s)
 }
 
+func (s *appState) matrixForm() tview.Primitive {
+	cfg := &s.config.Channels.Matrix
+	form := baseChannelForm("Matrix", cfg.Enabled, s.makeChannelOnEnabled(&cfg.Enabled))
+	form.AddInputField("Homeserver", cfg.Homeserver, 128, nil, func(text string) {
+		cfg.Homeserver = strings.TrimSpace(text)
+	})
+	form.AddInputField("User ID", cfg.UserID, 128, nil, func(text string) {
+		cfg.UserID = strings.TrimSpace(text)
+	})
+	form.AddInputField("Access Token", cfg.AccessToken, 128, nil, func(text string) {
+		cfg.AccessToken = strings.TrimSpace(text)
+	})
+	form.AddInputField("Device ID", cfg.DeviceID, 128, nil, func(text string) {
+		cfg.DeviceID = strings.TrimSpace(text)
+	})
+	form.AddCheckbox("Join On Invite", cfg.JoinOnInvite, func(checked bool) {
+		cfg.JoinOnInvite = checked
+	})
+	addAllowFromField(form, &cfg.AllowFrom)
+	return wrapWithBack(form, s)
+}
+
 func (s *appState) onebotForm() tview.Primitive {
 	cfg := &s.config.Channels.OneBot
 	form := baseChannelForm("OneBot", cfg.Enabled, s.makeChannelOnEnabled(&cfg.Enabled))

cmd/picoclaw-launcher/README.md

@@ -9,7 +9,7 @@ A standalone launcher for PicoClaw, providing visual JSON editing and OAuth prov
 
 - 📝 **Config Editor** — Sidebar-based settings UI with model management, channel configuration forms, and a raw JSON editor
 - 🤖 **Model Management** — Model card grid with availability status (grayed out without API key), primary model selection, add/edit/delete with required/optional field separation
-- 📡 **Channel Configuration** — Form-based settings for 12 channel types (Telegram, Discord, Slack, WeCom, DingTalk, Feishu, LINE, WhatsApp, QQ, OneBot, MaixCAM, etc.) with documentation links
+- 📡 **Channel Configuration** — Form-based settings for 13 channel types (Telegram, Discord, Slack, Matrix, WeCom, DingTalk, Feishu, LINE, WhatsApp, QQ, OneBot, MaixCAM, etc.) with documentation links
 - 🔐 **Provider Auth** — Login to OpenAI (Device Code), Anthropic (API Token), Google Antigravity (Browser OAuth)
 - 🌐 **Embedded Frontend** — Compiles to a single binary with no external dependencies
 - 🌍 **i18n** — Chinese/English language switching with browser auto-detection

cmd/picoclaw-launcher/internal/ui/index.html

@@ -538,6 +538,7 @@
                         <div class="sidebar-item" data-panel="panelCh_telegram">Telegram</div>
                         <div class="sidebar-item" data-panel="panelCh_discord">Discord</div>
                         <div class="sidebar-item" data-panel="panelCh_slack">Slack</div>
+                        <div class="sidebar-item" data-panel="panelCh_matrix">Matrix</div>
                         <div class="sidebar-item" data-panel="panelCh_wecom">WeCom</div>
                         <div class="sidebar-item" data-panel="panelCh_wecom_app">WeCom App</div>
                         <div class="sidebar-item" data-panel="panelCh_dingtalk">DingTalk</div>
@@ -606,6 +607,7 @@
                 <div class="content-panel" id="panelCh_telegram"></div>
                 <div class="content-panel" id="panelCh_discord"></div>
                 <div class="content-panel" id="panelCh_slack"></div>
+                <div class="content-panel" id="panelCh_matrix"></div>
                 <div class="content-panel" id="panelCh_wecom"></div>
                 <div class="content-panel" id="panelCh_wecom_app"></div>
                 <div class="content-panel" id="panelCh_dingtalk"></div>
@@ -1011,6 +1013,16 @@ const channelSchemas = {
             { key: 'app_token', label: 'App Token', type: 'password', placeholder: 'xapp-...' },
         ]
     },
+    matrix: {
+        title: 'Matrix', configKey: 'matrix', docSlug: null,
+        fields: [
+            { key: 'homeserver', label: 'Homeserver', type: 'text', placeholder: 'https://matrix.org' },
+            { key: 'user_id', label: 'User ID', type: 'text', placeholder: '@bot:matrix.org' },
+            { key: 'access_token', label: 'Access Token', type: 'password', placeholder: 'syt_...' },
+            { key: 'device_id', label: 'Device ID', type: 'text', placeholder: 'Optional device ID' },
+            { key: 'join_on_invite', label: 'Join On Invite', type: 'toggle' },
+        ]
+    },
     wecom: {
         title: 'WeCom (Bot)', configKey: 'wecom', docSlug: 'wecom-bot',
         fields: [

cmd/picoclaw/internal/gateway/helpers.go

@@ -19,6 +19,7 @@ import (
 	_ "github.com/sipeed/picoclaw/pkg/channels/irc"
 	_ "github.com/sipeed/picoclaw/pkg/channels/line"
 	_ "github.com/sipeed/picoclaw/pkg/channels/maixcam"
+	_ "github.com/sipeed/picoclaw/pkg/channels/matrix"
 	_ "github.com/sipeed/picoclaw/pkg/channels/onebot"
 	_ "github.com/sipeed/picoclaw/pkg/channels/pico"
 	_ "github.com/sipeed/picoclaw/pkg/channels/qq"

config/config.example.json

@@ -114,6 +114,23 @@
       "allow_from": [],
       "reasoning_channel_id": ""
     },
+    "matrix": {
+      "enabled": false,
+      "homeserver": "https://matrix.org",
+      "user_id": "@your-bot:matrix.org",
+      "access_token": "YOUR_MATRIX_ACCESS_TOKEN",
+      "device_id": "",
+      "join_on_invite": true,
+      "allow_from": [],
+      "group_trigger": {
+        "mention_only": true
+      },
+      "placeholder": {
+        "enabled": true,
+        "text": "Thinking... 💭"
+      },
+      "reasoning_channel_id": ""
+    },
     "line": {
       "enabled": false,
       "channel_secret": "YOUR_LINE_CHANNEL_SECRET",

docs/channels/matrix/README.md

@@ -0,0 +1,59 @@
+# Matrix Channel Configuration Guide
+
+## 1. Example Configuration
+
+Add this to `config.json`:
+
+```json
+{
+  "channels": {
+    "matrix": {
+      "enabled": true,
+      "homeserver": "https://matrix.org",
+      "user_id": "@your-bot:matrix.org",
+      "access_token": "YOUR_MATRIX_ACCESS_TOKEN",
+      "device_id": "",
+      "join_on_invite": true,
+      "allow_from": [],
+      "group_trigger": {
+        "mention_only": true
+      },
+      "placeholder": {
+        "enabled": true,
+        "text": "Thinking..."
+      },
+      "reasoning_channel_id": ""
+    }
+  }
+}
+```
+
+## 2. Field Reference
+
+| Field                | Type     | Required | Description |
+|----------------------|----------|----------|-------------|
+| enabled              | bool     | Yes      | Enable or disable the Matrix channel |
+| homeserver           | string   | Yes      | Matrix homeserver URL (for example `https://matrix.org`) |
+| user_id              | string   | Yes      | Bot Matrix user ID (for example `@bot:matrix.org`) |
+| access_token         | string   | Yes      | Bot access token |
+| device_id            | string   | No       | Optional Matrix device ID |
+| join_on_invite       | bool     | No       | Auto-join invited rooms |
+| allow_from           | []string | No       | User whitelist (Matrix user IDs) |
+| group_trigger        | object   | No       | Group trigger strategy (`mention_only` / `prefixes`) |
+| placeholder          | object   | No       | Placeholder message config |
+| reasoning_channel_id | string   | No       | Target channel for reasoning output |
+
+## 3. Currently Supported
+
+- Text message send/receive
+- Incoming image/audio/video/file download (MediaStore first, local path fallback)
+- Incoming audio normalization into existing transcription flow (`[audio: ...]`)
+- Outgoing image/audio/video/file upload and send
+- Group trigger rules (including mention-only mode)
+- Typing state (`m.typing`)
+- Placeholder message + final reply replacement
+- Auto-join invited rooms (can be disabled)
+
+## 4. TODO
+
+- Rich media metadata improvements (for example image/video size and thumbnails)

docs/channels/matrix/README.zh.md

@@ -0,0 +1,59 @@
+# Matrix 通道配置指南
+
+## 1. 配置示例
+
+在 `config.json` 中添加：
+
+```json
+{
+  "channels": {
+    "matrix": {
+      "enabled": true,
+      "homeserver": "https://matrix.org",
+      "user_id": "@your-bot:matrix.org",
+      "access_token": "YOUR_MATRIX_ACCESS_TOKEN",
+      "device_id": "",
+      "join_on_invite": true,
+      "allow_from": [],
+      "group_trigger": {
+        "mention_only": true
+      },
+      "placeholder": {
+        "enabled": true,
+        "text": "Thinking... 💭"
+      },
+      "reasoning_channel_id": ""
+    }
+  }
+}
+```
+
+## 2. 参数说明
+
+| 字段                 | 类型     | 必填 | 说明 |
+|----------------------|----------|------|------|
+| enabled              | bool     | 是   | 是否启用 Matrix 通道 |
+| homeserver           | string   | 是   | Matrix 服务器地址（例如 `https://matrix.org`） |
+| user_id              | string   | 是   | 机器人 Matrix 用户 ID（例如 `@bot:matrix.org`） |
+| access_token         | string   | 是   | 机器人 access token |
+| device_id            | string   | 否   | 设备 ID（可选） |
+| join_on_invite       | bool     | 否   | 是否自动加入邀请房间 |
+| allow_from           | []string | 否   | 白名单用户（Matrix 用户 ID） |
+| group_trigger        | object   | 否   | 群聊触发策略（支持 `mention_only` / `prefixes`） |
+| placeholder          | object   | 否   | 占位消息配置 |
+| reasoning_channel_id | string   | 否   | 思维链输出目标通道 |
+
+## 3. 当前支持
+
+- 文本消息收发
+- 图片/音频/视频/文件消息入站下载（写入 MediaStore / 本地路径回退）
+- 音频消息按统一标记进入现有转写流程（`[audio: ...]`）
+- 图片/音频/视频/文件消息出站发送（上传到 Matrix 媒体库后发送）
+- 群聊触发规则（支持仅 @ 提及时响应）
+- Typing 状态（`m.typing`）
+- 占位消息（`Thinking... 💭`）+ 最终回复替换
+- 自动加入邀请房间（可关闭）
+
+## 4. TODO
+
+- 富媒体细节增强（如 image/video 的尺寸、缩略图等 metadata）

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/bwmarrin/discordgo v0.29.0
 	github.com/caarlos0/env/v11 v11.3.1
 	github.com/chzyer/readline v1.5.1
+	github.com/ergochat/irc-go v0.5.0
 	github.com/gdamore/tcell/v2 v2.13.8
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
@@ -27,6 +28,7 @@ require (
 	golang.org/x/oauth2 v0.35.0
 	golang.org/x/time v0.14.0
 	google.golang.org/protobuf v1.36.11
+	maunium.net/go/mautrix v0.26.3
 	modernc.org/sqlite v1.46.1
 )
 
@@ -37,7 +39,6 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/elliotchance/orderedmap/v3 v3.1.0 // indirect
-	github.com/ergochat/irc-go v0.5.0 // indirect
 	github.com/gdamore/encoding v1.0.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect

go.sum

@@ -361,6 +361,8 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+maunium.net/go/mautrix v0.26.3 h1:tWZih6Vjw0qGTWuPmg9JUrQPzViTNDPGQLVc5UXC4nk=
+maunium.net/go/mautrix v0.26.3/go.mod h1:v5ZdDoCwUpNqEj5OrhEoUa3L1kEddKPaAya9TgGXN38=
 modernc.org/cc/v4 v4.27.1 h1:9W30zRlYrefrDV2JE2O8VDtJ1yPGownxciz5rrbQZis=
 modernc.org/cc/v4 v4.27.1/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
 modernc.org/ccgo/v4 v4.30.1 h1:4r4U1J6Fhj98NKfSjnPUN7Ze2c6MnAdL0hWw6+LrJpc=

pkg/channels/manager.go

@@ -61,6 +61,7 @@ var channelRateConfig = map[string]float64{
 	"telegram": 20,
 	"discord":  1,
 	"slack":    1,
+	"matrix":   2,
 	"line":     10,
 	"irc":      2,
 }
@@ -244,6 +245,13 @@ func (m *Manager) initChannels() error {
 		m.initChannel("slack", "Slack")
 	}
 
+	if m.config.Channels.Matrix.Enabled &&
+		m.config.Channels.Matrix.Homeserver != "" &&
+		m.config.Channels.Matrix.UserID != "" &&
+		m.config.Channels.Matrix.AccessToken != "" {
+		m.initChannel("matrix", "Matrix")
+	}
+
 	if m.config.Channels.LINE.Enabled && m.config.Channels.LINE.ChannelAccessToken != "" {
 		m.initChannel("line", "LINE")
 	}

pkg/channels/matrix/init.go

@@ -0,0 +1,13 @@
+package matrix
+
+import (
+	"github.com/sipeed/picoclaw/pkg/bus"
+	"github.com/sipeed/picoclaw/pkg/channels"
+	"github.com/sipeed/picoclaw/pkg/config"
+)
+
+func init() {
+	channels.RegisterFactory("matrix", func(cfg *config.Config, b *bus.MessageBus) (channels.Channel, error) {
+		return NewMatrixChannel(cfg.Channels.Matrix, b)
+	})
+}

pkg/channels/matrix/matrix.go

@@ -0,0 +1,896 @@
+package matrix
+
+import (
+	"context"
+	"fmt"
+	"mime"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+
+	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/event"
+	"maunium.net/go/mautrix/id"
+
+	"github.com/sipeed/picoclaw/pkg/bus"
+	"github.com/sipeed/picoclaw/pkg/channels"
+	"github.com/sipeed/picoclaw/pkg/config"
+	"github.com/sipeed/picoclaw/pkg/identity"
+	"github.com/sipeed/picoclaw/pkg/logger"
+	"github.com/sipeed/picoclaw/pkg/media"
+)
+
+const (
+	typingRefreshInterval = 20 * time.Second
+	typingServerTTL       = 30 * time.Second
+	roomKindCacheTTL      = 5 * time.Minute
+)
+
+type roomKindCacheEntry struct {
+	isGroup   bool
+	expiresAt time.Time
+}
+
+type typingSession struct {
+	stopCh chan struct{}
+	once   sync.Once
+}
+
+func newTypingSession() *typingSession {
+	return &typingSession{
+		stopCh: make(chan struct{}),
+	}
+}
+
+func (s *typingSession) stop() {
+	s.once.Do(func() {
+		close(s.stopCh)
+	})
+}
+
+// MatrixChannel implements the Channel interface for Matrix.
+type MatrixChannel struct {
+	*channels.BaseChannel
+
+	client *mautrix.Client
+	config config.MatrixConfig
+	syncer *mautrix.DefaultSyncer
+
+	ctx       context.Context
+	cancel    context.CancelFunc
+	startTime time.Time
+
+	typingMu       sync.Mutex
+	typingSessions map[string]*typingSession // roomID -> session
+
+	roomKindCache sync.Map // roomID -> roomKindCacheEntry
+}
+
+func NewMatrixChannel(cfg config.MatrixConfig, messageBus *bus.MessageBus) (*MatrixChannel, error) {
+	homeserver := strings.TrimSpace(cfg.Homeserver)
+	userID := strings.TrimSpace(cfg.UserID)
+	accessToken := strings.TrimSpace(cfg.AccessToken)
+	if homeserver == "" {
+		return nil, fmt.Errorf("matrix homeserver is required")
+	}
+	if userID == "" {
+		return nil, fmt.Errorf("matrix user_id is required")
+	}
+	if accessToken == "" {
+		return nil, fmt.Errorf("matrix access_token is required")
+	}
+
+	client, err := mautrix.NewClient(homeserver, id.UserID(userID), accessToken)
+	if err != nil {
+		return nil, fmt.Errorf("create matrix client: %w", err)
+	}
+	if cfg.DeviceID != "" {
+		client.DeviceID = id.DeviceID(cfg.DeviceID)
+	}
+
+	syncer, ok := client.Syncer.(*mautrix.DefaultSyncer)
+	if !ok {
+		return nil, fmt.Errorf("matrix syncer is not *mautrix.DefaultSyncer")
+	}
+
+	base := channels.NewBaseChannel(
+		"matrix",
+		cfg,
+		messageBus,
+		cfg.AllowFrom,
+		channels.WithMaxMessageLength(65536),
+		channels.WithGroupTrigger(cfg.GroupTrigger),
+		channels.WithReasoningChannelID(cfg.ReasoningChannelID),
+	)
+
+	return &MatrixChannel{
+		BaseChannel:    base,
+		client:         client,
+		config:         cfg,
+		syncer:         syncer,
+		typingSessions: make(map[string]*typingSession),
+		startTime:      time.Now(),
+		roomKindCache:  sync.Map{},
+		typingMu:       sync.Mutex{},
+	}, nil
+}
+
+func (c *MatrixChannel) Start(ctx context.Context) error {
+	logger.InfoC("matrix", "Starting Matrix channel")
+
+	c.ctx, c.cancel = context.WithCancel(ctx)
+	c.startTime = time.Now()
+
+	c.syncer.OnEventType(event.EventMessage, c.handleMessageEvent)
+	c.syncer.OnEventType(event.StateMember, c.handleMemberEvent)
+
+	c.SetRunning(true)
+
+	go func() {
+		if err := c.client.SyncWithContext(c.ctx); err != nil && c.ctx.Err() == nil {
+			logger.ErrorCF("matrix", "Matrix sync stopped unexpectedly", map[string]any{
+				"error": err.Error(),
+			})
+		}
+	}()
+
+	logger.InfoC("matrix", "Matrix channel started")
+	return nil
+}
+
+func (c *MatrixChannel) Stop(ctx context.Context) error {
+	logger.InfoC("matrix", "Stopping Matrix channel")
+	c.SetRunning(false)
+
+	if c.cancel != nil {
+		c.cancel()
+	}
+	c.stopTypingSessions(ctx)
+
+	logger.InfoC("matrix", "Matrix channel stopped")
+	return nil
+}
+
+func (c *MatrixChannel) Send(ctx context.Context, msg bus.OutboundMessage) error {
+	if !c.IsRunning() {
+		return channels.ErrNotRunning
+	}
+
+	roomID := id.RoomID(strings.TrimSpace(msg.ChatID))
+	if roomID == "" {
+		return fmt.Errorf("matrix room ID is empty: %w", channels.ErrSendFailed)
+	}
+
+	content := strings.TrimSpace(msg.Content)
+	if content == "" {
+		return nil
+	}
+
+	_, err := c.client.SendMessageEvent(ctx, roomID, event.EventMessage, &event.MessageEventContent{
+		MsgType: event.MsgText,
+		Body:    content,
+	})
+	if err != nil {
+		return fmt.Errorf("matrix send: %w", channels.ErrTemporary)
+	}
+	return nil
+}
+
+// SendMedia implements channels.MediaSender.
+func (c *MatrixChannel) SendMedia(ctx context.Context, msg bus.OutboundMediaMessage) error {
+	if !c.IsRunning() {
+		return channels.ErrNotRunning
+	}
+	sendCtx := ctx
+	if sendCtx == nil {
+		sendCtx = context.Background()
+	}
+
+	roomID := id.RoomID(strings.TrimSpace(msg.ChatID))
+	if roomID == "" {
+		return fmt.Errorf("matrix room ID is empty: %w", channels.ErrSendFailed)
+	}
+
+	store := c.GetMediaStore()
+	if store == nil {
+		return fmt.Errorf("no media store available: %w", channels.ErrSendFailed)
+	}
+
+	for _, part := range msg.Parts {
+		if err := sendCtx.Err(); err != nil {
+			return err
+		}
+
+		localPath, meta, err := store.ResolveWithMeta(part.Ref)
+		if err != nil {
+			logger.ErrorCF("matrix", "Failed to resolve media ref", map[string]any{
+				"ref":   part.Ref,
+				"error": err.Error(),
+			})
+			continue
+		}
+
+		fileInfo, err := os.Stat(localPath)
+		if err != nil {
+			logger.ErrorCF("matrix", "Failed to stat media file", map[string]any{
+				"path":  localPath,
+				"error": err.Error(),
+			})
+			continue
+		}
+
+		file, err := os.Open(localPath)
+		if err != nil {
+			logger.ErrorCF("matrix", "Failed to open media file", map[string]any{
+				"path":  localPath,
+				"error": err.Error(),
+			})
+			continue
+		}
+
+		filename := strings.TrimSpace(part.Filename)
+		if filename == "" {
+			filename = strings.TrimSpace(meta.Filename)
+		}
+		if filename == "" {
+			filename = filepath.Base(localPath)
+		}
+		if filename == "" {
+			filename = "file"
+		}
+
+		contentType := strings.TrimSpace(part.ContentType)
+		if contentType == "" {
+			contentType = strings.TrimSpace(meta.ContentType)
+		}
+		if contentType == "" {
+			contentType = mime.TypeByExtension(strings.ToLower(filepath.Ext(filename)))
+		}
+		if contentType == "" {
+			contentType = "application/octet-stream"
+		}
+
+		uploadResp, err := c.client.UploadMedia(sendCtx, mautrix.ReqUploadMedia{
+			Content:       file,
+			ContentLength: fileInfo.Size(),
+			ContentType:   contentType,
+			FileName:      filename,
+		})
+		file.Close()
+		if err != nil {
+			logger.ErrorCF("matrix", "Failed to upload media", map[string]any{
+				"path":  localPath,
+				"type":  part.Type,
+				"error": err.Error(),
+			})
+			return fmt.Errorf("matrix upload media: %w", channels.ErrTemporary)
+		}
+
+		msgType := matrixOutboundMsgType(part.Type, filename, contentType)
+		content := matrixOutboundContent(
+			part.Caption,
+			filename,
+			msgType,
+			contentType,
+			fileInfo.Size(),
+			uploadResp.ContentURI.CUString(),
+		)
+
+		if _, err := c.client.SendMessageEvent(sendCtx, roomID, event.EventMessage, content); err != nil {
+			logger.ErrorCF("matrix", "Failed to send media message", map[string]any{
+				"room_id": roomID.String(),
+				"type":    msgType,
+				"error":   err.Error(),
+			})
+			return fmt.Errorf("matrix send media: %w", channels.ErrTemporary)
+		}
+	}
+
+	return nil
+}
+
+// StartTyping implements channels.TypingCapable.
+func (c *MatrixChannel) StartTyping(ctx context.Context, chatID string) (func(), error) {
+	if !c.IsRunning() {
+		return func() {}, nil
+	}
+
+	roomID := id.RoomID(strings.TrimSpace(chatID))
+	if roomID == "" {
+		return func() {}, fmt.Errorf("matrix room ID is empty")
+	}
+
+	session := newTypingSession()
+
+	c.typingMu.Lock()
+	if prev := c.typingSessions[chatID]; prev != nil {
+		prev.stop()
+	}
+	c.typingSessions[chatID] = session
+	c.typingMu.Unlock()
+
+	parent := c.baseContext()
+	go c.typingLoop(parent, roomID, session)
+
+	var once sync.Once
+	stop := func() {
+		once.Do(func() {
+			session.stop()
+			c.typingMu.Lock()
+			if current := c.typingSessions[chatID]; current == session {
+				delete(c.typingSessions, chatID)
+			}
+			c.typingMu.Unlock()
+			_, _ = c.client.UserTyping(context.Background(), roomID, false, 0)
+		})
+	}
+
+	return stop, nil
+}
+
+// SendPlaceholder implements channels.PlaceholderCapable.
+func (c *MatrixChannel) SendPlaceholder(ctx context.Context, chatID string) (string, error) {
+	if !c.config.Placeholder.Enabled {
+		return "", nil
+	}
+
+	roomID := id.RoomID(strings.TrimSpace(chatID))
+	if roomID == "" {
+		return "", fmt.Errorf("matrix room ID is empty")
+	}
+
+	text := strings.TrimSpace(c.config.Placeholder.Text)
+	if text == "" {
+		text = "Thinking... 💭"
+	}
+
+	resp, err := c.client.SendMessageEvent(ctx, roomID, event.EventMessage, &event.MessageEventContent{
+		MsgType: event.MsgNotice,
+		Body:    text,
+	})
+	if err != nil {
+		return "", err
+	}
+
+	return resp.EventID.String(), nil
+}
+
+// EditMessage implements channels.MessageEditor.
+func (c *MatrixChannel) EditMessage(ctx context.Context, chatID string, messageID string, content string) error {
+	roomID := id.RoomID(strings.TrimSpace(chatID))
+	if roomID == "" {
+		return fmt.Errorf("matrix room ID is empty")
+	}
+	if strings.TrimSpace(messageID) == "" {
+		return fmt.Errorf("matrix message ID is empty")
+	}
+
+	editContent := &event.MessageEventContent{
+		MsgType: event.MsgText,
+		Body:    content,
+	}
+	editContent.SetEdit(id.EventID(messageID))
+
+	_, err := c.client.SendMessageEvent(ctx, roomID, event.EventMessage, editContent)
+	return err
+}
+
+func (c *MatrixChannel) handleMemberEvent(ctx context.Context, evt *event.Event) {
+	if !c.config.JoinOnInvite {
+		return
+	}
+	if evt == nil {
+		return
+	}
+
+	member := evt.Content.AsMember()
+	if member.Membership != event.MembershipInvite {
+		return
+	}
+	if evt.GetStateKey() != c.client.UserID.String() {
+		return
+	}
+
+	_, err := c.client.JoinRoomByID(c.baseContext(), evt.RoomID)
+	if err != nil {
+		logger.WarnCF("matrix", "Failed to auto-join invited room", map[string]any{
+			"room_id": evt.RoomID.String(),
+			"error":   err.Error(),
+		})
+		return
+	}
+
+	logger.InfoCF("matrix", "Joined room after invite", map[string]any{
+		"room_id": evt.RoomID.String(),
+	})
+}
+
+func (c *MatrixChannel) handleMessageEvent(ctx context.Context, evt *event.Event) {
+	if evt == nil {
+		return
+	}
+
+	// Ignore our own messages.
+	if evt.Sender == c.client.UserID {
+		return
+	}
+
+	// Ignore historical events on first sync.
+	if time.UnixMilli(evt.Timestamp).Before(c.startTime) {
+		return
+	}
+
+	msgEvt := evt.Content.AsMessage()
+	if msgEvt == nil {
+		return
+	}
+
+	// Ignore edits.
+	if msgEvt.RelatesTo != nil && msgEvt.RelatesTo.GetReplaceID() != "" {
+		return
+	}
+
+	roomID := evt.RoomID.String()
+	scope := channels.BuildMediaScope("matrix", roomID, evt.ID.String())
+
+	content, mediaPaths, ok := c.extractInboundContent(ctx, msgEvt, scope)
+	if !ok {
+		return
+	}
+	content = strings.TrimSpace(content)
+	if content == "" && len(mediaPaths) == 0 {
+		return
+	}
+
+	senderID := evt.Sender.String()
+	sender := bus.SenderInfo{
+		Platform:    "matrix",
+		PlatformID:  senderID,
+		CanonicalID: identity.BuildCanonicalID("matrix", senderID),
+		Username:    senderID,
+		DisplayName: senderID,
+	}
+
+	if !c.IsAllowedSender(sender) {
+		logger.DebugCF("matrix", "Message rejected by allowlist", map[string]any{
+			"sender_id": senderID,
+		})
+		return
+	}
+
+	isGroup := c.isGroupRoom(ctx, evt.RoomID)
+	if isGroup {
+		isMentioned := c.isBotMentioned(msgEvt)
+		if isMentioned {
+			content = stripUserMention(content, c.client.UserID)
+		}
+		respond, cleaned := c.ShouldRespondInGroup(isMentioned, content)
+		if !respond {
+			return
+		}
+		content = cleaned
+	} else {
+		content = stripUserMention(content, c.client.UserID)
+	}
+
+	content = strings.TrimSpace(content)
+	if content == "" {
+		return
+	}
+
+	peerKind := "direct"
+	peerID := senderID
+	if isGroup {
+		peerKind = "group"
+		peerID = roomID
+	}
+
+	metadata := map[string]string{
+		"room_id":    roomID,
+		"timestamp":  fmt.Sprintf("%d", evt.Timestamp),
+		"is_group":   fmt.Sprintf("%t", isGroup),
+		"sender_raw": senderID,
+	}
+	if replyTo := msgEvt.GetRelatesTo().GetReplyTo(); replyTo != "" {
+		metadata["reply_to_msg_id"] = replyTo.String()
+	}
+
+	c.HandleMessage(
+		c.baseContext(),
+		bus.Peer{Kind: peerKind, ID: peerID},
+		evt.ID.String(),
+		senderID,
+		roomID,
+		content,
+		mediaPaths,
+		metadata,
+		sender,
+	)
+}
+
+func (c *MatrixChannel) extractInboundContent(
+	ctx context.Context,
+	msgEvt *event.MessageEventContent,
+	scope string,
+) (string, []string, bool) {
+	switch msgEvt.MsgType {
+	case event.MsgText, event.MsgNotice:
+		return msgEvt.Body, nil, true
+	case event.MsgImage, event.MsgAudio, event.MsgVideo, event.MsgFile:
+		return c.extractInboundMedia(ctx, msgEvt, scope)
+	default:
+		logger.DebugCF("matrix", "Ignoring unsupported matrix msgtype", map[string]any{
+			"msgtype": msgEvt.MsgType,
+		})
+		return "", nil, false
+	}
+}
+
+func (c *MatrixChannel) extractInboundMedia(
+	ctx context.Context,
+	msgEvt *event.MessageEventContent,
+	scope string,
+) (string, []string, bool) {
+	mediaKind := matrixMediaKind(msgEvt.MsgType)
+	label := matrixMediaLabel(msgEvt, mediaKind)
+	content := fmt.Sprintf("[%s: %s]", mediaKind, label)
+	if caption := strings.TrimSpace(msgEvt.GetCaption()); caption != "" {
+		content = caption + "\n" + content
+	}
+
+	localPath, err := c.downloadMedia(ctx, msgEvt, mediaKind)
+	if err != nil {
+		logger.WarnCF("matrix", "Failed to download media; forwarding as text-only marker", map[string]any{
+			"msgtype": msgEvt.MsgType,
+			"error":   err.Error(),
+		})
+		return content, nil, true
+	}
+
+	filename := matrixMediaFilename(label, mediaKind, matrixContentType(msgEvt))
+	ref := c.storeMedia(localPath, media.MediaMeta{
+		Filename:    filename,
+		ContentType: matrixContentType(msgEvt),
+		Source:      "matrix",
+	}, scope)
+	return content, []string{ref}, true
+}
+
+func (c *MatrixChannel) storeMedia(localPath string, meta media.MediaMeta, scope string) string {
+	if store := c.GetMediaStore(); store != nil {
+		ref, err := store.Store(localPath, meta, scope)
+		if err == nil {
+			return ref
+		}
+		logger.WarnCF("matrix", "Failed to store media in MediaStore, falling back to local path", map[string]any{
+			"path":  localPath,
+			"error": err.Error(),
+		})
+	}
+	return localPath
+}
+
+func (c *MatrixChannel) downloadMedia(
+	ctx context.Context,
+	msgEvt *event.MessageEventContent,
+	mediaKind string,
+) (string, error) {
+	uri := matrixMediaURI(msgEvt)
+	if uri == "" {
+		return "", fmt.Errorf("empty matrix media URL")
+	}
+	parsed := uri.ParseOrIgnore()
+	if parsed.IsEmpty() {
+		return "", fmt.Errorf("invalid matrix media URL: %s", uri)
+	}
+
+	dlCtx := c.baseContext()
+	if ctx != nil {
+		dlCtx = ctx
+	}
+	reqCtx, cancel := context.WithTimeout(dlCtx, 20*time.Second)
+	defer cancel()
+
+	data, err := c.client.DownloadBytes(reqCtx, parsed)
+	if err != nil {
+		return "", err
+	}
+
+	// Encrypted attachments put URL in msgEvt.File and require client-side decryption.
+	if msgEvt != nil && msgEvt.File != nil && msgEvt.URL == "" {
+		if err := msgEvt.File.DecryptInPlace(data); err != nil {
+			return "", fmt.Errorf("decrypt matrix media: %w", err)
+		}
+	}
+
+	label := matrixMediaLabel(msgEvt, mediaKind)
+	ext := matrixMediaExt(label, matrixContentType(msgEvt), mediaKind)
+	tmp, err := os.CreateTemp("", "matrix-media-*"+ext)
+	if err != nil {
+		return "", err
+	}
+	defer tmp.Close()
+
+	if _, err = tmp.Write(data); err != nil {
+		_ = os.Remove(tmp.Name())
+		return "", err
+	}
+
+	return tmp.Name(), nil
+}
+
+func matrixContentType(msgEvt *event.MessageEventContent) string {
+	if msgEvt != nil && msgEvt.Info != nil {
+		return strings.TrimSpace(msgEvt.Info.MimeType)
+	}
+	return ""
+}
+
+func matrixMediaURI(msgEvt *event.MessageEventContent) id.ContentURIString {
+	if msgEvt == nil {
+		return ""
+	}
+	if msgEvt.URL != "" {
+		return msgEvt.URL
+	}
+	if msgEvt.File != nil {
+		return msgEvt.File.URL
+	}
+	return ""
+}
+
+func matrixMediaKind(msgType event.MessageType) string {
+	switch msgType {
+	case event.MsgAudio:
+		return "audio"
+	case event.MsgVideo:
+		return "video"
+	case event.MsgFile:
+		return "file"
+	default:
+		return "image"
+	}
+}
+
+func matrixOutboundMsgType(partType, filename, contentType string) event.MessageType {
+	switch strings.ToLower(strings.TrimSpace(partType)) {
+	case "image":
+		return event.MsgImage
+	case "audio", "voice":
+		return event.MsgAudio
+	case "video":
+		return event.MsgVideo
+	case "file", "document":
+		return event.MsgFile
+	}
+
+	ct := strings.ToLower(strings.TrimSpace(contentType))
+	switch {
+	case strings.HasPrefix(ct, "image/"):
+		return event.MsgImage
+	case strings.HasPrefix(ct, "audio/"), ct == "application/ogg", ct == "application/x-ogg":
+		return event.MsgAudio
+	case strings.HasPrefix(ct, "video/"):
+		return event.MsgVideo
+	}
+
+	switch strings.ToLower(strings.TrimSpace(filepath.Ext(filename))) {
+	case ".jpg", ".jpeg", ".png", ".gif", ".webp", ".bmp", ".svg":
+		return event.MsgImage
+	case ".mp3", ".wav", ".ogg", ".m4a", ".flac", ".aac", ".wma", ".opus":
+		return event.MsgAudio
+	case ".mp4", ".avi", ".mov", ".webm", ".mkv":
+		return event.MsgVideo
+	default:
+		return event.MsgFile
+	}
+}
+
+func matrixOutboundContent(
+	caption, filename string,
+	msgType event.MessageType,
+	contentType string,
+	size int64,
+	uri id.ContentURIString,
+) *event.MessageEventContent {
+	body := strings.TrimSpace(caption)
+	if body == "" {
+		body = filename
+	}
+	if body == "" {
+		body = matrixMediaKind(msgType)
+	}
+
+	info := &event.FileInfo{MimeType: strings.TrimSpace(contentType)}
+	if size > 0 && size <= int64(int(^uint(0)>>1)) {
+		info.Size = int(size)
+	}
+
+	content := &event.MessageEventContent{
+		MsgType:  msgType,
+		Body:     body,
+		URL:      uri,
+		FileName: filename,
+		Info:     info,
+	}
+	return content
+}
+
+func matrixMediaLabel(msgEvt *event.MessageEventContent, fallback string) string {
+	if msgEvt == nil {
+		return fallback
+	}
+	if v := strings.TrimSpace(msgEvt.FileName); v != "" {
+		return v
+	}
+	if v := strings.TrimSpace(msgEvt.Body); v != "" {
+		return v
+	}
+	return fallback
+}
+
+func matrixMediaFilename(label, mediaKind, contentType string) string {
+	filename := strings.TrimSpace(label)
+	if filename == "" {
+		filename = mediaKind
+	}
+	if filepath.Ext(filename) == "" {
+		filename += matrixMediaExt("", contentType, mediaKind)
+	}
+	return filename
+}
+
+func matrixMediaExt(filename, contentType, mediaKind string) string {
+	if ext := strings.TrimSpace(filepath.Ext(filename)); ext != "" {
+		return ext
+	}
+	if contentType != "" {
+		if exts, err := mime.ExtensionsByType(contentType); err == nil && len(exts) > 0 {
+			return exts[0]
+		}
+	}
+	switch mediaKind {
+	case "audio":
+		return ".ogg"
+	case "video":
+		return ".mp4"
+	case "file":
+		return ".bin"
+	default:
+		return ".jpg"
+	}
+}
+
+func (c *MatrixChannel) isGroupRoom(ctx context.Context, roomID id.RoomID) bool {
+	now := time.Now()
+	if cached, ok := c.roomKindCache.Load(roomID.String()); ok {
+		entry := cached.(roomKindCacheEntry)
+		if now.Before(entry.expiresAt) {
+			return entry.isGroup
+		}
+	}
+
+	qctx := c.baseContext()
+	if ctx != nil {
+		qctx = ctx
+	}
+	reqCtx, cancel := context.WithTimeout(qctx, 5*time.Second)
+	defer cancel()
+
+	resp, err := c.client.JoinedMembers(reqCtx, roomID)
+	if err != nil {
+		logger.DebugCF("matrix", "Failed to query room members; assume direct", map[string]any{
+			"room_id": roomID.String(),
+			"error":   err.Error(),
+		})
+		return false
+	}
+
+	isGroup := len(resp.Joined) > 2
+	c.roomKindCache.Store(roomID.String(), roomKindCacheEntry{
+		isGroup:   isGroup,
+		expiresAt: now.Add(roomKindCacheTTL),
+	})
+	return isGroup
+}
+
+func (c *MatrixChannel) isBotMentioned(msgEvt *event.MessageEventContent) bool {
+	if msgEvt == nil {
+		return false
+	}
+
+	if msgEvt.Mentions != nil && msgEvt.Mentions.Has(c.client.UserID) {
+		return true
+	}
+
+	userID := c.client.UserID.String()
+	if userID != "" && (strings.Contains(msgEvt.Body, userID) || strings.Contains(msgEvt.FormattedBody, userID)) {
+		return true
+	}
+
+	localpart := matrixLocalpart(c.client.UserID)
+	if localpart == "" {
+		return false
+	}
+
+	re := localpartMentionRegexp(localpart)
+	return re.MatchString(msgEvt.Body) || re.MatchString(msgEvt.FormattedBody)
+}
+
+func (c *MatrixChannel) typingLoop(ctx context.Context, roomID id.RoomID, session *typingSession) {
+	sendTyping := func() {
+		_, err := c.client.UserTyping(ctx, roomID, true, typingServerTTL)
+		if err != nil {
+			logger.DebugCF("matrix", "Failed to send typing status", map[string]any{
+				"room_id": roomID.String(),
+				"error":   err.Error(),
+			})
+		}
+	}
+
+	sendTyping()
+	ticker := time.NewTicker(typingRefreshInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-session.stopCh:
+			return
+		case <-ticker.C:
+			sendTyping()
+		}
+	}
+}
+
+func (c *MatrixChannel) stopTypingSessions(ctx context.Context) {
+	c.typingMu.Lock()
+	sessions := c.typingSessions
+	c.typingSessions = make(map[string]*typingSession)
+	c.typingMu.Unlock()
+
+	stopCtx := ctx
+	if stopCtx == nil {
+		stopCtx = context.Background()
+	}
+	for roomID, session := range sessions {
+		session.stop()
+		_, _ = c.client.UserTyping(stopCtx, id.RoomID(roomID), false, 0)
+	}
+}
+
+func (c *MatrixChannel) baseContext() context.Context {
+	if c.ctx != nil {
+		return c.ctx
+	}
+	return context.Background()
+}
+
+func matrixLocalpart(userID id.UserID) string {
+	s := strings.TrimPrefix(userID.String(), "@")
+	localpart, _, _ := strings.Cut(s, ":")
+	return strings.TrimSpace(localpart)
+}
+
+func localpartMentionRegexp(localpart string) *regexp.Regexp {
+	pattern := `(?i)(^|[^[:alnum:]_])@` + regexp.QuoteMeta(localpart) + `(?::[A-Za-z0-9._:-]+)?([^[:alnum:]_]|$)`
+	return regexp.MustCompile(pattern)
+}
+
+func stripUserMention(text string, userID id.UserID) string {
+	cleaned := strings.ReplaceAll(text, userID.String(), "")
+
+	localpart := matrixLocalpart(userID)
+	if localpart != "" {
+		re := localpartMentionRegexp(localpart)
+		cleaned = re.ReplaceAllString(cleaned, "$1$2")
+	}
+
+	cleaned = strings.TrimSpace(cleaned)
+	cleaned = strings.TrimLeft(cleaned, ",:; ")
+	return strings.TrimSpace(cleaned)
+}

pkg/channels/matrix/matrix_test.go

@@ -0,0 +1,218 @@
+package matrix
+
+import (
+	"context"
+	"testing"
+
+	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/event"
+	"maunium.net/go/mautrix/id"
+)
+
+func TestMatrixLocalpartMentionRegexp(t *testing.T) {
+	re := localpartMentionRegexp("picoclaw")
+
+	cases := []struct {
+		text string
+		want bool
+	}{
+		{text: "@picoclaw hello", want: true},
+		{text: "hi @picoclaw:matrix.org", want: true},
+		{text: "欢迎一下picoclaw小龙虾", want: false}, // historical false-positive case in PR #356
+		{text: "mail test@example.com", want: false},
+	}
+
+	for _, tc := range cases {
+		if got := re.MatchString(tc.text); got != tc.want {
+			t.Fatalf("text=%q match=%v want=%v", tc.text, got, tc.want)
+		}
+	}
+}
+
+func TestStripUserMention(t *testing.T) {
+	userID := id.UserID("@picoclaw:matrix.org")
+
+	cases := []struct {
+		in   string
+		want string
+	}{
+		{in: "@picoclaw:matrix.org hello", want: "hello"},
+		{in: "@picoclaw, hello", want: "hello"},
+		{in: "no mention here", want: "no mention here"},
+	}
+
+	for _, tc := range cases {
+		if got := stripUserMention(tc.in, userID); got != tc.want {
+			t.Fatalf("stripUserMention(%q)=%q want=%q", tc.in, got, tc.want)
+		}
+	}
+}
+
+func TestIsBotMentioned(t *testing.T) {
+	ch := &MatrixChannel{
+		client: &mautrix.Client{
+			UserID: id.UserID("@picoclaw:matrix.org"),
+		},
+	}
+
+	cases := []struct {
+		name string
+		msg  event.MessageEventContent
+		want bool
+	}{
+		{
+			name: "mentions field",
+			msg: event.MessageEventContent{
+				Body: "hello",
+				Mentions: &event.Mentions{
+					UserIDs: []id.UserID{id.UserID("@picoclaw:matrix.org")},
+				},
+			},
+			want: true,
+		},
+		{
+			name: "full user id in body",
+			msg: event.MessageEventContent{
+				Body: "@picoclaw:matrix.org hello",
+			},
+			want: true,
+		},
+		{
+			name: "localpart with at sign",
+			msg: event.MessageEventContent{
+				Body: "@picoclaw hello",
+			},
+			want: true,
+		},
+		{
+			name: "localpart without at sign should not match",
+			msg: event.MessageEventContent{
+				Body: "欢迎一下picoclaw小龙虾",
+			},
+			want: false,
+		},
+	}
+
+	for _, tc := range cases {
+		if got := ch.isBotMentioned(&tc.msg); got != tc.want {
+			t.Fatalf("%s: got=%v want=%v", tc.name, got, tc.want)
+		}
+	}
+}
+
+func TestMatrixMediaExt(t *testing.T) {
+	if got := matrixMediaExt("photo.png", "", "image"); got != ".png" {
+		t.Fatalf("filename extension mismatch: got=%q", got)
+	}
+	if got := matrixMediaExt("", "image/webp", "image"); got != ".webp" {
+		t.Fatalf("content-type extension mismatch: got=%q", got)
+	}
+	if got := matrixMediaExt("", "", "image"); got != ".jpg" {
+		t.Fatalf("default image extension mismatch: got=%q", got)
+	}
+	if got := matrixMediaExt("", "", "audio"); got != ".ogg" {
+		t.Fatalf("default audio extension mismatch: got=%q", got)
+	}
+	if got := matrixMediaExt("", "", "video"); got != ".mp4" {
+		t.Fatalf("default video extension mismatch: got=%q", got)
+	}
+	if got := matrixMediaExt("", "", "file"); got != ".bin" {
+		t.Fatalf("default file extension mismatch: got=%q", got)
+	}
+}
+
+func TestExtractInboundContent_ImageNoURLFallback(t *testing.T) {
+	ch := &MatrixChannel{}
+	msg := &event.MessageEventContent{
+		MsgType: event.MsgImage,
+		Body:    "test.png",
+	}
+
+	content, mediaRefs, ok := ch.extractInboundContent(context.Background(), msg, "matrix:room:event")
+	if !ok {
+		t.Fatal("expected ok for image fallback")
+	}
+	if content != "[image: test.png]" {
+		t.Fatalf("unexpected content: %q", content)
+	}
+	if len(mediaRefs) != 0 {
+		t.Fatalf("expected no media refs, got %d", len(mediaRefs))
+	}
+}
+
+func TestExtractInboundContent_AudioNoURLFallback(t *testing.T) {
+	ch := &MatrixChannel{}
+	msg := &event.MessageEventContent{
+		MsgType:  event.MsgAudio,
+		FileName: "voice.ogg",
+		Body:     "please transcribe",
+	}
+
+	content, mediaRefs, ok := ch.extractInboundContent(context.Background(), msg, "matrix:room:event")
+	if !ok {
+		t.Fatal("expected ok for audio fallback")
+	}
+	if content != "please transcribe\n[audio: voice.ogg]" {
+		t.Fatalf("unexpected content: %q", content)
+	}
+	if len(mediaRefs) != 0 {
+		t.Fatalf("expected no media refs, got %d", len(mediaRefs))
+	}
+}
+
+func TestMatrixOutboundMsgType(t *testing.T) {
+	cases := []struct {
+		name        string
+		partType    string
+		filename    string
+		contentType string
+		want        event.MessageType
+	}{
+		{name: "explicit image", partType: "image", want: event.MsgImage},
+		{name: "explicit audio", partType: "audio", want: event.MsgAudio},
+		{name: "mime fallback video", contentType: "video/mp4", want: event.MsgVideo},
+		{name: "extension fallback audio", filename: "voice.ogg", want: event.MsgAudio},
+		{name: "unknown defaults file", filename: "report.txt", want: event.MsgFile},
+	}
+
+	for _, tc := range cases {
+		if got := matrixOutboundMsgType(tc.partType, tc.filename, tc.contentType); got != tc.want {
+			t.Fatalf("%s: got=%q want=%q", tc.name, got, tc.want)
+		}
+	}
+}
+
+func TestMatrixOutboundContent(t *testing.T) {
+	content := matrixOutboundContent(
+		"please review",
+		"voice.ogg",
+		event.MsgAudio,
+		"audio/ogg",
+		1234,
+		id.ContentURIString("mxc://matrix.org/abc"),
+	)
+	if content.Body != "please review" {
+		t.Fatalf("unexpected body: %q", content.Body)
+	}
+	if content.FileName != "voice.ogg" {
+		t.Fatalf("unexpected filename: %q", content.FileName)
+	}
+	if content.Info == nil || content.Info.MimeType != "audio/ogg" {
+		t.Fatalf("unexpected content type: %+v", content.Info)
+	}
+	if content.Info == nil || content.Info.Size != 1234 {
+		t.Fatalf("unexpected size: %+v", content.Info)
+	}
+
+	noCaption := matrixOutboundContent(
+		"",
+		"image.png",
+		event.MsgImage,
+		"image/png",
+		0,
+		id.ContentURIString("mxc://matrix.org/def"),
+	)
+	if noCaption.Body != "image.png" {
+		t.Fatalf("unexpected fallback body: %q", noCaption.Body)
+	}
+}

pkg/config/config.go

@@ -225,6 +225,7 @@ type ChannelsConfig struct {
 	QQ         QQConfig         `json:"qq"`
 	DingTalk   DingTalkConfig   `json:"dingtalk"`
 	Slack      SlackConfig      `json:"slack"`
+	Matrix     MatrixConfig     `json:"matrix"`
 	LINE       LINEConfig       `json:"line"`
 	OneBot     OneBotConfig     `json:"onebot"`
 	WeCom      WeComConfig      `json:"wecom"`
@@ -333,6 +334,19 @@ type SlackConfig struct {
 	ReasoningChannelID string              `json:"reasoning_channel_id"    env:"PICOCLAW_CHANNELS_SLACK_REASONING_CHANNEL_ID"`
 }
 
+type MatrixConfig struct {
+	Enabled            bool                `json:"enabled"                 env:"PICOCLAW_CHANNELS_MATRIX_ENABLED"`
+	Homeserver         string              `json:"homeserver"              env:"PICOCLAW_CHANNELS_MATRIX_HOMESERVER"`
+	UserID             string              `json:"user_id"                 env:"PICOCLAW_CHANNELS_MATRIX_USER_ID"`
+	AccessToken        string              `json:"access_token"            env:"PICOCLAW_CHANNELS_MATRIX_ACCESS_TOKEN"`
+	DeviceID           string              `json:"device_id,omitempty"     env:"PICOCLAW_CHANNELS_MATRIX_DEVICE_ID"`
+	JoinOnInvite       bool                `json:"join_on_invite"          env:"PICOCLAW_CHANNELS_MATRIX_JOIN_ON_INVITE"`
+	AllowFrom          FlexibleStringSlice `json:"allow_from"              env:"PICOCLAW_CHANNELS_MATRIX_ALLOW_FROM"`
+	GroupTrigger       GroupTriggerConfig  `json:"group_trigger,omitempty"`
+	Placeholder        PlaceholderConfig   `json:"placeholder,omitempty"`
+	ReasoningChannelID string              `json:"reasoning_channel_id"    env:"PICOCLAW_CHANNELS_MATRIX_REASONING_CHANNEL_ID"`
+}
+
 type LINEConfig struct {
 	Enabled            bool                `json:"enabled"                 env:"PICOCLAW_CHANNELS_LINE_ENABLED"`
 	ChannelSecret      string              `json:"channel_secret"          env:"PICOCLAW_CHANNELS_LINE_CHANNEL_SECRET"`

pkg/config/config_test.go

@@ -283,6 +283,9 @@ func TestDefaultConfig_Channels(t *testing.T) {
 	if cfg.Channels.Slack.Enabled {
 		t.Error("Slack should be disabled by default")
 	}
+	if cfg.Channels.Matrix.Enabled {
+		t.Error("Matrix should be disabled by default")
+	}
 }
 
 // TestDefaultConfig_WebTools verifies web tools config

pkg/config/defaults.go

@@ -97,6 +97,22 @@ func DefaultConfig() *Config {
 				AppToken:  "",
 				AllowFrom: FlexibleStringSlice{},
 			},
+			Matrix: MatrixConfig{
+				Enabled:      false,
+				Homeserver:   "https://matrix.org",
+				UserID:       "",
+				AccessToken:  "",
+				DeviceID:     "",
+				JoinOnInvite: true,
+				AllowFrom:    FlexibleStringSlice{},
+				GroupTrigger: GroupTriggerConfig{
+					MentionOnly: true,
+				},
+				Placeholder: PlaceholderConfig{
+					Enabled: true,
+					Text:    "Thinking... 💭",
+				},
+			},
 			LINE: LINEConfig{
 				Enabled:            false,
 				ChannelSecret:      "",

pkg/migrate/sources/openclaw/common.go

@@ -22,6 +22,7 @@ var supportedChannels = map[string]bool{
 	"qq":        true,
 	"dingtalk":  true,
 	"slack":     true,
+	"matrix":    true,
 	"line":      true,
 	"onebot":    true,
 	"wecom":     true,

pkg/migrate/sources/openclaw/openclaw_config.go

@@ -371,6 +371,8 @@ func (c *OpenClawConfig) IsChannelEnabled(name string) bool {
 		return c.Channels.Discord == nil || c.Channels.Discord.Enabled == nil || *c.Channels.Discord.Enabled
 	case "slack":
 		return c.Channels.Slack == nil || c.Channels.Slack.Enabled == nil || *c.Channels.Slack.Enabled
+	case "matrix":
+		return c.Channels.Matrix == nil || c.Channels.Matrix.Enabled == nil || *c.Channels.Matrix.Enabled
 	case "whatsapp":
 		return c.Channels.WhatsApp == nil || c.Channels.WhatsApp.Enabled == nil || *c.Channels.WhatsApp.Enabled
 	case "feishu":
@@ -397,6 +399,11 @@ func GetChannelAllowFrom(ch any) []string {
 			return nil
 		}
 		return c.AllowFrom
+	case *OpenClawMatrixConfig:
+		if c == nil {
+			return nil
+		}
+		return c.AllowFrom
 	case *OpenClawWhatsAppConfig:
 		if c == nil {
 			return nil
@@ -627,6 +634,7 @@ type ChannelsConfig struct {
 	QQ       QQConfig       `json:"qq"`
 	DingTalk DingTalkConfig `json:"dingtalk"`
 	Slack    SlackConfig    `json:"slack"`
+	Matrix   MatrixConfig   `json:"matrix"`
 	LINE     LINEConfig     `json:"line"`
 }
 
@@ -687,6 +695,14 @@ type SlackConfig struct {
 	AllowFrom []string `json:"allow_from"`
 }
 
+type MatrixConfig struct {
+	Enabled     bool     `json:"enabled"`
+	Homeserver  string   `json:"homeserver"`
+	UserID      string   `json:"user_id"`
+	AccessToken string   `json:"access_token"`
+	AllowFrom   []string `json:"allow_from"`
+}
+
 type LINEConfig struct {
 	Enabled            bool     `json:"enabled"`
 	ChannelSecret      string   `json:"channel_secret"`
@@ -862,12 +878,26 @@ func (c *OpenClawConfig) convertChannels(warnings *[]string) ChannelsConfig {
 		}
 	}
 
+	if c.Channels.Matrix != nil && supportedChannels["matrix"] {
+		enabled := c.Channels.Matrix.Enabled == nil || *c.Channels.Matrix.Enabled
+		channels.Matrix = MatrixConfig{
+			Enabled:   enabled,
+			AllowFrom: c.Channels.Matrix.AllowFrom,
+		}
+		if c.Channels.Matrix.Homeserver != nil {
+			channels.Matrix.Homeserver = *c.Channels.Matrix.Homeserver
+		}
+		if c.Channels.Matrix.UserID != nil {
+			channels.Matrix.UserID = *c.Channels.Matrix.UserID
+		}
+		if c.Channels.Matrix.AccessToken != nil {
+			channels.Matrix.AccessToken = *c.Channels.Matrix.AccessToken
+		}
+	}
+
 	if c.Channels.Signal != nil {
 		*warnings = append(*warnings, "Channel 'signal': No PicoClaw adapter available")
 	}
-	if c.Channels.Matrix != nil {
-		*warnings = append(*warnings, "Channel 'matrix': No PicoClaw adapter available")
-	}
 	if c.Channels.IRC != nil {
 		*warnings = append(*warnings, "Channel 'irc': No PicoClaw adapter available")
 	}
@@ -1020,6 +1050,14 @@ func (c ChannelsConfig) ToStandardChannels() config.ChannelsConfig {
 			BotToken: c.Slack.BotToken,
 			AppToken: c.Slack.AppToken,
 		},
+		Matrix: config.MatrixConfig{
+			Enabled:      c.Matrix.Enabled,
+			Homeserver:   c.Matrix.Homeserver,
+			UserID:       c.Matrix.UserID,
+			AccessToken:  c.Matrix.AccessToken,
+			AllowFrom:    c.Matrix.AllowFrom,
+			JoinOnInvite: true,
+		},
 		LINE: config.LINEConfig{
 			Enabled:            c.LINE.Enabled,
 			ChannelSecret:      c.LINE.ChannelSecret,

pkg/migrate/sources/openclaw/openclaw_config_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -375,6 +376,96 @@ func TestConvertToPicoClawWithQQAndDingTalk(t *testing.T) {
 	}
 }
 
+func TestConvertToPicoClawWithMatrix(t *testing.T) {
+	tmpDir := t.TempDir()
+	configPath := filepath.Join(tmpDir, "openclaw.json")
+
+	testConfig := `{
+		"channels": {
+			"matrix": {
+				"enabled": true,
+				"homeserver": "https://matrix.example.com",
+				"userId": "@bot:matrix.example.com",
+				"accessToken": "syt_test_token",
+				"allowFrom": ["@alice:matrix.example.com"]
+			}
+		}
+	}`
+
+	err := os.WriteFile(configPath, []byte(testConfig), 0o644)
+	if err != nil {
+		t.Fatalf("failed to write test config: %v", err)
+	}
+
+	cfg, err := LoadOpenClawConfig(configPath)
+	if err != nil {
+		t.Fatalf("failed to load config: %v", err)
+	}
+
+	picoCfg, warnings, err := cfg.ConvertToPicoClaw("")
+	if err != nil {
+		t.Fatalf("failed to convert config: %v", err)
+	}
+
+	if !picoCfg.Channels.Matrix.Enabled {
+		t.Error("matrix should be enabled")
+	}
+	if picoCfg.Channels.Matrix.Homeserver != "https://matrix.example.com" {
+		t.Errorf("expected matrix homeserver, got %q", picoCfg.Channels.Matrix.Homeserver)
+	}
+	if picoCfg.Channels.Matrix.UserID != "@bot:matrix.example.com" {
+		t.Errorf("expected matrix user_id, got %q", picoCfg.Channels.Matrix.UserID)
+	}
+	if picoCfg.Channels.Matrix.AccessToken != "syt_test_token" {
+		t.Errorf("expected matrix access_token, got %q", picoCfg.Channels.Matrix.AccessToken)
+	}
+	if len(picoCfg.Channels.Matrix.AllowFrom) != 1 ||
+		picoCfg.Channels.Matrix.AllowFrom[0] != "@alice:matrix.example.com" {
+		t.Errorf("unexpected matrix allow_from: %#v", picoCfg.Channels.Matrix.AllowFrom)
+	}
+
+	for _, w := range warnings {
+		if strings.Contains(w, "Channel 'matrix'") {
+			t.Fatalf("matrix should no longer be reported as unsupported, warning=%q", w)
+		}
+	}
+}
+
+func TestConvertToPicoClawWithMatrixDisabled(t *testing.T) {
+	tmpDir := t.TempDir()
+	configPath := filepath.Join(tmpDir, "openclaw.json")
+
+	testConfig := `{
+		"channels": {
+			"matrix": {
+				"enabled": false,
+				"homeserver": "https://matrix.example.com",
+				"userId": "@bot:matrix.example.com",
+				"accessToken": "syt_test_token"
+			}
+		}
+	}`
+
+	err := os.WriteFile(configPath, []byte(testConfig), 0o644)
+	if err != nil {
+		t.Fatalf("failed to write test config: %v", err)
+	}
+
+	cfg, err := LoadOpenClawConfig(configPath)
+	if err != nil {
+		t.Fatalf("failed to load config: %v", err)
+	}
+
+	picoCfg, _, err := cfg.ConvertToPicoClaw("")
+	if err != nil {
+		t.Fatalf("failed to convert config: %v", err)
+	}
+
+	if picoCfg.Channels.Matrix.Enabled {
+		t.Error("matrix should respect enabled=false from source config")
+	}
+}
+
 func TestOpenClawAgentModel(t *testing.T) {
 	model := &OpenClawAgentModel{
 		Primary:   strPtr("anthropic/claude-3-opus"),
@@ -425,6 +516,9 @@ func TestChannelEnabled(t *testing.T) {
 	if !cfg.IsChannelEnabled("slack") {
 		t.Error("slack should be enabled (explicitly set)")
 	}
+	if !cfg.IsChannelEnabled("matrix") {
+		t.Error("matrix should be enabled (nil config defaults to enabled)")
+	}
 	if cfg.IsChannelEnabled("line") {
 		t.Error("line should return false (not in switch cases)")
 	}