DM pairing + Telegram channel improvements (#17)

* feat: Implement DM pairing for channels

- Introduced a new pairing system to manage direct messages from unknown senders.
- Added `PairingStore` to handle pending requests and allowlist management.
- Implemented CLI commands for listing and approving pairing requests.
- Updated Telegram channel to utilize the new pairing logic, including workspace paths for storing pairing data.
- Enhanced WASM channel integration to support pairing functionality.

This feature enhances security by requiring approval for unknown senders before they can interact with the agent.

* Enhance Telegram channel support with media captioning and DM pairing features

- Added support for media captions in Telegram messages, allowing for richer content handling.
- Updated message processing to utilize either text or caption, improving message flexibility.
- Enhanced DM pairing functionality to include approval and listing capabilities for direct messages.
- Updated feature parity documentation to reflect new capabilities and improvements in Telegram integration.

* Update README and BUILDING_CHANNELS documentation for Telegram channel integration

- Enhanced README with instructions for building and running the Telegram channel, including a note on running `./scripts/build-all.sh` for full releases.
- Added detailed steps in BUILDING_CHANNELS.md for building and deploying the Telegram channel, emphasizing the need to run `./channels-src/telegram/build.sh` before building the main crate to ensure updated WASM is included.
- Updated CLI module to expose a new command for pairing with store functionality.

* Implement build script for Telegram channel WASM and enhance pairing error handling

- Added a new `build.rs` script to automate the compilation of the Telegram channel's WASM binary from source, ensuring reproducible builds and emphasizing supply chain security by preventing committed binaries.
- Updated `BUILDING_CHANNELS.md` to reflect the new build process and the importance of not committing compiled binaries.
- Enhanced error handling in the pairing approval process to include rate limiting for failed attempts, improving security and user feedback.

* Remove Telegram channel WASM binary file as part of the build process cleanup, ensuring no committed binaries are present in the repository.

Cargo.lock

@@ -1621,6 +1621,16 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "fs4"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2eeb4ed9e12f43b7fa0baae3f9cdda28352770132ef2e09a23760c29cae8bd47"
+dependencies = [
+ "rustix 0.38.44",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -2299,6 +2309,7 @@ dependencies = [
  "deadpool-postgres",
  "dirs 6.0.0",
  "dotenvy",
+ "fs4",
  "futures",
  "hkdf",
  "http-body-util",

Cargo.toml

@@ -67,6 +67,7 @@ aho-corasick = "1"
 
 # Filesystem paths
 dirs = "6"
+fs4 = "0.6"
 
 # Secrecy for sensitive values
 secrecy = { version = "0.10", features = ["serde"] }

FEATURE_PARITY.md

@@ -59,7 +59,7 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 | REPL (simple) | ✅ | ✅ | - | For testing |
 | WASM channels | ❌ | ✅ | - | IronClaw innovation |
 | WhatsApp | ✅ | ❌ | P1 | Baileys (Web) |
-| Telegram | ✅ | ✅ | - | WASM tool (MTProto) |
+| Telegram | ✅ | ✅ | - | WASM channel(MTProto), DM pairing, caption, /start, bot_username |
 | Discord | ✅ | ❌ | P2 | discord.js |
 | Signal | ✅ | ❌ | P2 | signal-cli |
 | Slack | ✅ | ✅ | - | WASM tool |
@@ -79,13 +79,13 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 
 | Feature | OpenClaw | IronClaw | Notes |
 |---------|----------|----------|-------|
-| DM pairing codes | ✅ | ❌ | Verification for unknown senders |
+| DM pairing codes | ✅ | ✅ | `ironclaw pairing list/approve`, host APIs |
-| Allowlist/blocklist | ✅ | ❌ | Per-channel access control |
+| Allowlist/blocklist | ✅ | 🚧 | allow_from + pairing store |
 | Self-message bypass | ✅ | ❌ | Own messages skip pairing |
-| Mention-based activation | ✅ | ❌ | Configurable patterns |
+| Mention-based activation | ✅ | ✅ | bot_username + respond_to_all_group_messages |
 | Per-group tool policies | ✅ | ❌ | Allow/deny specific tools |
 | Thread isolation | ✅ | ✅ | Separate sessions per thread |
-| Per-channel media limits | ✅ | ❌ | |
+| Per-channel media limits | ✅ | 🚧 | Caption support for media; no size limits |
 | Typing indicators | ✅ | 🚧 | TUI shows status |
 
 ### Owner: _Unassigned_
@@ -109,7 +109,7 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 | `sessions` | ✅ | ❌ | P3 | Session listing |
 | `memory` | ✅ | ✅ | - | Memory search CLI |
 | `skills` | ✅ | ❌ | P3 | Agent skills |
-| `pairing` | ✅ | ❌ | P3 | Node pairing |
+| `pairing` | ✅ | ✅ | - | list/approve for channel DM pairing |
 | `nodes` | ✅ | ❌ | P3 | Device management |
 | `plugins` | ✅ | ❌ | P3 | Plugin management |
 | `hooks` | ✅ | ❌ | P2 | Lifecycle hooks |
@@ -350,8 +350,8 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 | Device pairing | ✅ | ❌ | |
 | Tailscale identity | ✅ | ❌ | |
 | OAuth flows | ✅ | 🚧 | NEAR AI OAuth |
-| DM pairing verification | ✅ | ❌ | |
+| DM pairing verification | ✅ | ✅ | ironclaw pairing approve, host APIs |
-| Allowlist/blocklist | ✅ | ❌ | |
+| Allowlist/blocklist | ✅ | 🚧 | allow_from + pairing store |
 | Per-group tool policies | ✅ | ❌ | |
 | Exec approvals | ✅ | ✅ | TUI overlay |
 | TLS 1.3 minimum | ✅ | ✅ | reqwest rustls |
@@ -397,6 +397,7 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 ### P0 - Core (Already Done)
 - ✅ TUI channel with approval overlays
 - ✅ HTTP webhook channel
+- ✅ DM pairing (ironclaw pairing list/approve, host APIs)
 - ✅ WASM tool sandbox
 - ✅ Workspace/memory with hybrid search
 - ✅ Prompt injection defense
@@ -415,12 +416,18 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 - ✅ Gateway token auth
 
 ### P1 - High Priority
+- ❌ Slack channel (real implementation)
+- ✅ Telegram channel (WASM, DM pairing, caption, /start)
 - ❌ WhatsApp channel
 - ❌ Multi-provider failover
 - ❌ Hooks system (beforeInbound, beforeToolCall, etc.)
 
 ### P2 - Medium Priority
-- ❌ Media handling (images, PDFs)
+- ❌ Cron job scheduling
+- ❌ Web Control UI
+- ❌ WebChat channel
+- 🚧 Media handling (caption support; no image/PDF processing)
+- ❌ CLI subcommands (config, status, memory, doctor)
 - ❌ Ollama/local model support
 - ❌ Configuration hot-reload
 - ❌ Webhook trigger endpoint in web gateway

README.md

@@ -85,6 +85,8 @@ cargo build --release
 cargo test
 ```
 
+For **full release** (after modifying channel sources), run `./scripts/build-all.sh` to rebuild channels first.
+
 ### Database Setup
 
 ```bash
@@ -228,6 +230,9 @@ cargo test
 cargo test test_name
 ```
 
+- **Telegram channel**: See [docs/TELEGRAM_SETUP.md](docs/TELEGRAM_SETUP.md) for setup and DM pairing.
+- **Changing channel sources**: Run `./channels-src/telegram/build.sh` before `cargo build` so the updated WASM is bundled.
+
 ## OpenClaw Heritage
 
 IronClaw is a Rust reimplementation inspired by [OpenClaw](https://github.com/openclaw/openclaw). See [FEATURE_PARITY.md](FEATURE_PARITY.md) for the complete tracking matrix.

build.rs

@@ -0,0 +1,105 @@
+//! Build script: compile Telegram channel WASM from source.
+//!
+//! Do not commit compiled WASM binaries — they are a supply chain risk.
+//! This script builds telegram.wasm from channels-src/telegram before the main crate compiles.
+//!
+//! Reproducible build:
+//!   cargo build --release
+//! (build.rs invokes the channel build automatically)
+//!
+//! Prerequisites: rustup target add wasm32-wasip2, cargo install wasm-tools
+
+use std::env;
+use std::path::PathBuf;
+use std::process::Command;
+
+fn main() {
+    let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let root = PathBuf::from(&manifest_dir);
+    let channel_dir = root.join("channels-src/telegram");
+    let wasm_out = channel_dir.join("telegram.wasm");
+
+    // Rerun when channel source or build script changes
+    println!("cargo:rerun-if-changed=channels-src/telegram/src");
+    println!("cargo:rerun-if-changed=channels-src/telegram/Cargo.toml");
+    println!("cargo:rerun-if-changed=wit/channel.wit");
+
+    if !channel_dir.is_dir() {
+        return;
+    }
+
+    // Build WASM module
+    let status = match Command::new("cargo")
+        .args([
+            "build",
+            "--release",
+            "--target",
+            "wasm32-wasip2",
+            "--manifest-path",
+            channel_dir.join("Cargo.toml").to_str().unwrap(),
+        ])
+        .current_dir(&root)
+        .status()
+    {
+        Ok(s) => s,
+        Err(_) => {
+            eprintln!(
+                "cargo:warning=Telegram channel build failed. Run: ./channels-src/telegram/build.sh"
+            );
+            return;
+        }
+    };
+
+    if !status.success() {
+        eprintln!(
+            "cargo:warning=Telegram channel build failed. Run: ./channels-src/telegram/build.sh"
+        );
+        return;
+    }
+
+    let raw_wasm = channel_dir.join("target/wasm32-wasip2/release/telegram_channel.wasm");
+    if !raw_wasm.exists() {
+        eprintln!(
+            "cargo:warning=Telegram WASM output not found at {:?}",
+            raw_wasm
+        );
+        return;
+    }
+
+    // Convert to component and strip (wasm-tools)
+    let component_ok = Command::new("wasm-tools")
+        .args([
+            "component",
+            "new",
+            raw_wasm.to_str().unwrap(),
+            "-o",
+            wasm_out.to_str().unwrap(),
+        ])
+        .current_dir(&root)
+        .status()
+        .map(|s| s.success())
+        .unwrap_or(false);
+
+    if !component_ok
+    {
+        // Fallback: copy raw module if wasm-tools unavailable
+        if std::fs::copy(&raw_wasm, &wasm_out).is_err() {
+            eprintln!(
+                "cargo:warning=wasm-tools not found. Run: cargo install wasm-tools"
+            );
+        }
+    } else {
+        // Strip debug info (use temp file to avoid clobbering)
+        let stripped = wasm_out.with_extension("wasm.stripped");
+        let strip_ok = Command::new("wasm-tools")
+            .args(["strip", wasm_out.to_str().unwrap(), "-o", stripped.to_str().unwrap()])
+            .current_dir(&root)
+            .status()
+            .map(|s| s.success())
+            .unwrap_or(false);
+        if strip_ok
+        {
+            let _ = std::fs::rename(&stripped, &wasm_out);
+        }
+    }
+}

channels-src/telegram/src/lib.rs

@@ -72,6 +72,10 @@ struct TelegramMessage {
     /// Message text.
     text: Option<String>,
 
+    /// Caption for media (photo, video, document, etc.).
+    #[serde(default)]
+    caption: Option<String>,
+
     /// Original message if this is a reply.
     reply_to_message: Option<Box<TelegramMessage>>,
 
@@ -160,6 +164,21 @@ const POLLING_STATE_PATH: &str = "state/last_update_id";
 /// Workspace path for persisting owner_id across WASM callbacks.
 const OWNER_ID_PATH: &str = "state/owner_id";
 
+/// Workspace path for persisting dm_policy across WASM callbacks.
+const DM_POLICY_PATH: &str = "state/dm_policy";
+
+/// Workspace path for persisting allow_from (JSON array) across WASM callbacks.
+const ALLOW_FROM_PATH: &str = "state/allow_from";
+
+/// Channel name for pairing store (used by pairing host APIs).
+const CHANNEL_NAME: &str = "telegram";
+
+/// Workspace path for persisting bot_username for mention detection in groups.
+const BOT_USERNAME_PATH: &str = "state/bot_username";
+
+/// Workspace path for persisting respond_to_all_group_messages flag.
+const RESPOND_TO_ALL_GROUP_PATH: &str = "state/respond_to_all_group_messages";
+
 // ============================================================================
 // Channel Metadata
 // ============================================================================
@@ -196,6 +215,14 @@ struct TelegramConfig {
     #[serde(default)]
     owner_id: Option<i64>,
 
+    /// DM policy: "pairing" (default), "allowlist", or "open".
+    #[serde(default)]
+    dm_policy: Option<String>,
+
+    /// Allowed sender IDs/usernames from config (merged with pairing-approved store).
+    #[serde(default)]
+    allow_from: Option<Vec<String>>,
+
     /// Whether to respond to all group messages (not just mentions).
     #[serde(default)]
     respond_to_all_group_messages: bool,
@@ -257,6 +284,28 @@ impl Guest for TelegramChannel {
             );
         }
 
+        // Persist dm_policy and allow_from for DM pairing in handle_message
+        let dm_policy = config
+            .dm_policy
+            .as_deref()
+            .unwrap_or("pairing")
+            .to_string();
+        let _ = channel_host::workspace_write(DM_POLICY_PATH, &dm_policy);
+
+        let allow_from_json = serde_json::to_string(&config.allow_from.unwrap_or_default())
+            .unwrap_or_else(|_| "[]".to_string());
+        let _ = channel_host::workspace_write(ALLOW_FROM_PATH, &allow_from_json);
+
+        // Persist bot_username and respond_to_all_group_messages for group handling
+        let _ = channel_host::workspace_write(
+            BOT_USERNAME_PATH,
+            &config.bot_username.unwrap_or_default(),
+        );
+        let _ = channel_host::workspace_write(
+            RESPOND_TO_ALL_GROUP_PATH,
+            &config.respond_to_all_group_messages.to_string(),
+        );
+
         // Mode is determined by whether the host injected a tunnel_url
         // If tunnel is configured, use webhooks. Otherwise, use polling.
         let webhook_mode = config.tunnel_url.is_some();
@@ -780,6 +829,47 @@ fn register_webhook(tunnel_url: &str, webhook_secret: Option<&str>) -> Result<()
     }
 }
 
+// ============================================================================
+// Pairing Reply
+// ============================================================================
+
+/// Send a pairing code message to a chat. Used when an unknown user DMs the bot.
+fn send_pairing_reply(chat_id: i64, code: &str) -> Result<(), String> {
+    let payload = serde_json::json!({
+        "chat_id": chat_id,
+        "text": format!(
+            "To pair with this bot, run: `ironclaw pairing approve telegram {}`",
+            code
+        ),
+        "parse_mode": "Markdown",
+    });
+
+    let payload_bytes = serde_json::to_vec(&payload)
+        .map_err(|e| format!("Failed to serialize payload: {}", e))?;
+
+    let headers = serde_json::json!({
+        "Content-Type": "application/json"
+    });
+
+    let result = channel_host::http_request(
+        "POST",
+        "https://api.telegram.org/bot{TELEGRAM_BOT_TOKEN}/sendMessage",
+        &headers.to_string(),
+        Some(&payload_bytes),
+    );
+
+    match result {
+        Ok(response) => {
+            if response.status != 200 {
+                let body_str = String::from_utf8_lossy(&response.body);
+                return Err(format!("HTTP {}: {}", response.status, body_str));
+            }
+            Ok(())
+        }
+        Err(e) => Err(format!("HTTP request failed: {}", e)),
+    }
+}
+
 // ============================================================================
 // Update Handling
 // ============================================================================
@@ -799,11 +889,16 @@ fn handle_update(update: TelegramUpdate) {
 
 /// Process a single message.
 fn handle_message(message: TelegramMessage) {
-    // Skip messages without text
+    // Use text or caption (for media messages)
-    let text = match message.text {
+    let content = message
-        Some(t) if !t.is_empty() => t,
+        .text
-        _ => return,
+        .filter(|t| !t.is_empty())
-    };
+        .or_else(|| message.caption.filter(|c| !c.is_empty()))
+        .unwrap_or_default();
+
+    if content.is_empty() {
+        return;
+    }
 
     // Skip messages without a sender (channel posts)
     let from = match message.from {
@@ -816,41 +911,111 @@ fn handle_message(message: TelegramMessage) {
         return;
     }
 
-    // Owner validation: silently drop messages from non-owner users
+    let is_private = message.chat.chat_type == "private";
-    if let Some(owner_id_str) = channel_host::workspace_read(OWNER_ID_PATH) {
+
-        if !owner_id_str.is_empty() {
+    // Owner validation: when owner_id is set, only that user can message
-            if let Ok(owner_id) = owner_id_str.parse::<i64>() {
+    let owner_configured = channel_host::workspace_read(OWNER_ID_PATH)
-                if from.id != owner_id {
+        .map(|s| !s.is_empty())
-                    channel_host::log(
+        .unwrap_or(false);
-                        channel_host::LogLevel::Debug,
+
-                        &format!(
+    if owner_configured {
-                            "Dropping message from non-owner user {} (owner: {})",
+        if let Ok(owner_id) = channel_host::workspace_read(OWNER_ID_PATH)
-                            from.id, owner_id
+            .unwrap()
-                        ),
+            .parse::<i64>()
-                    );
+        {
-                    return;
+            if from.id != owner_id {
+                channel_host::log(
+                    channel_host::LogLevel::Debug,
+                    &format!(
+                        "Dropping message from non-owner user {} (owner: {})",
+                        from.id, owner_id
+                    ),
+                );
+                return;
+            }
+        }
+    } else if is_private {
+        // No owner_id: apply dm_policy for private chats
+        let dm_policy = channel_host::workspace_read(DM_POLICY_PATH)
+            .unwrap_or_else(|| "pairing".to_string());
+
+        if dm_policy != "open" {
+            // Build effective allow list: config allow_from + pairing store
+            let mut allowed: Vec<String> = channel_host::workspace_read(ALLOW_FROM_PATH)
+                .and_then(|s| serde_json::from_str(&s).ok())
+                .unwrap_or_default();
+
+            if let Ok(store_allowed) = channel_host::pairing_read_allow_from(CHANNEL_NAME) {
+                allowed.extend(store_allowed);
+            }
+
+            let id_str = from.id.to_string();
+            let username_opt = from.username.as_deref();
+            let is_allowed = allowed.contains(&"*".to_string())
+                || allowed.contains(&id_str)
+                || username_opt.map_or(false, |u| allowed.contains(&u.to_string()));
+
+            if !is_allowed {
+                if dm_policy == "pairing" {
+                    // Upsert pairing request and send reply
+                    let meta = serde_json::json!({
+                        "chat_id": message.chat.id,
+                        "user_id": from.id,
+                        "username": username_opt,
+                    })
+                    .to_string();
+
+                    match channel_host::pairing_upsert_request(CHANNEL_NAME, &id_str, &meta) {
+                        Ok(result) => {
+                            channel_host::log(
+                                channel_host::LogLevel::Info,
+                                &format!(
+                                    "Pairing request for user {} (chat {}): code {}",
+                                    from.id, message.chat.id, result.code
+                                ),
+                            );
+                            if result.created {
+                                let _ = send_pairing_reply(message.chat.id, &result.code);
+                            }
+                        }
+                        Err(e) => {
+                            channel_host::log(
+                                channel_host::LogLevel::Error,
+                                &format!("Pairing upsert failed: {}", e),
+                            );
+                        }
+                    }
                 }
+                return;
             }
         }
     }
 
-    let is_private = message.chat.chat_type == "private";
+    // For group chats, only respond if bot was mentioned or respond_to_all is enabled
-
-    // For group chats, check if the bot was mentioned
-    // TODO: Read bot_username from config and check mentions
-    // For now, process all messages in private chats and groups
     if !is_private {
-        // In groups, only respond if there's a bot mention or command
+        let respond_to_all = channel_host::workspace_read(RESPOND_TO_ALL_GROUP_PATH)
-        // This is a simplified check - proper implementation would use entities
+            .as_deref()
-        let has_command = text.starts_with('/');
+            .unwrap_or("false")
-        let has_mention = text.contains('@');
+            == "true";
 
-        if !has_command && !has_mention {
+        if !respond_to_all {
-            channel_host::log(
+            let has_command = content.starts_with('/');
-                channel_host::LogLevel::Debug,
+            let bot_username = channel_host::workspace_read(BOT_USERNAME_PATH)
-                &format!("Ignoring group message without mention: {}", text),
+                .unwrap_or_default();
-            );
+            let has_bot_mention = if bot_username.is_empty() {
-            return;
+                content.contains('@')
+            } else {
+                let mention = format!("@{}", bot_username);
+                content.to_lowercase().contains(&mention.to_lowercase())
+            };
+
+            if !has_command && !has_bot_mention {
+                channel_host::log(
+                    channel_host::LogLevel::Debug,
+                    &format!("Ignoring group message without mention: {}", content),
+                );
+                return;
+            }
         }
     }
 
@@ -872,17 +1037,30 @@ fn handle_message(message: TelegramMessage) {
     let metadata_json = serde_json::to_string(&metadata).unwrap_or_else(|_| "{}".to_string());
 
     // Clean the message text (strip bot mentions and commands)
-    let cleaned_text = clean_message_text(&text);
+    let bot_username = channel_host::workspace_read(BOT_USERNAME_PATH).unwrap_or_default();
+    let cleaned_text = clean_message_text(
+        &content,
+        if bot_username.is_empty() {
+            None
+        } else {
+            Some(bot_username.as_str())
+        },
+    );
 
-    if cleaned_text.is_empty() {
+    // For /start with no args, emit placeholder so agent can respond with welcome
+    let content_to_emit = if cleaned_text.is_empty() && content.trim().starts_with('/') {
+        "[User started the bot]".to_string()
+    } else if cleaned_text.is_empty() {
         return;
-    }
+    } else {
+        cleaned_text
+    };
 
     // Emit the message to the agent
     channel_host::emit_message(&EmittedMessage {
         user_id: from.id.to_string(),
         user_name: Some(user_name),
-        content: cleaned_text,
+        content: content_to_emit,
         thread_id: None, // Telegram doesn't have threads in the same way
         metadata_json,
     });
@@ -897,7 +1075,8 @@ fn handle_message(message: TelegramMessage) {
 }
 
 /// Clean message text by removing bot commands and @mentions at the start.
-fn clean_message_text(text: &str) -> String {
+/// When bot_username is set, only strips that specific mention; otherwise strips any leading @mention.
+fn clean_message_text(text: &str, bot_username: Option<&str>) -> String {
     let mut result = text.trim().to_string();
 
     // Remove leading /command
@@ -912,11 +1091,30 @@ fn clean_message_text(text: &str) -> String {
 
     // Remove leading @mention
     if result.starts_with('@') {
-        if let Some(space_idx) = result.find(' ') {
+        if let Some(bot) = bot_username {
-            result = result[space_idx..].trim_start().to_string();
+            let mention = format!("@{}", bot);
+            let mention_lower = mention.to_lowercase();
+            let result_lower = result.to_lowercase();
+            if result_lower.starts_with(&mention_lower) {
+                let rest = result[mention.len()..].trim_start();
+                if rest.is_empty() {
+                    return String::new();
+                }
+                result = rest.to_string();
+            } else if let Some(space_idx) = result.find(' ') {
+                // Different leading @mention - only strip if it's the bot
+                let first_word = &result[..space_idx];
+                if first_word.eq_ignore_ascii_case(&mention) {
+                    result = result[space_idx..].trim_start().to_string();
+                }
+            }
         } else {
-            // Just a mention with no text
+            // No bot_username: strip any leading @mention
-            return String::new();
+            if let Some(space_idx) = result.find(' ') {
+                result = result[space_idx..].trim_start().to_string();
+            } else {
+                return String::new();
+            }
         }
     }
 
@@ -952,12 +1150,22 @@ mod tests {
 
     #[test]
     fn test_clean_message_text() {
-        assert_eq!(clean_message_text("/start hello"), "hello");
+        // Without bot_username: strips any leading @mention
-        assert_eq!(clean_message_text("@bot hello world"), "hello world");
+        assert_eq!(clean_message_text("/start hello", None), "hello");
-        assert_eq!(clean_message_text("/start"), "");
+        assert_eq!(clean_message_text("@bot hello world", None), "hello world");
-        assert_eq!(clean_message_text("@botname"), "");
+        assert_eq!(clean_message_text("/start", None), "");
-        assert_eq!(clean_message_text("just text"), "just text");
+        assert_eq!(clean_message_text("@botname", None), "");
-        assert_eq!(clean_message_text("  spaced  "), "spaced");
+        assert_eq!(clean_message_text("just text", None), "just text");
+        assert_eq!(clean_message_text("  spaced  ", None), "spaced");
+
+        // With bot_username: only strips @MyBot, not @alice
+        assert_eq!(clean_message_text("@MyBot hello", Some("MyBot")), "hello");
+        assert_eq!(clean_message_text("@mybot hi", Some("MyBot")), "hi");
+        assert_eq!(
+            clean_message_text("@alice hello", Some("MyBot")),
+            "@alice hello"
+        );
+        assert_eq!(clean_message_text("@MyBot", Some("MyBot")), "");
     }
 
     #[test]
@@ -1025,4 +1233,17 @@ mod tests {
         assert_eq!(from.id, 789);
         assert_eq!(from.first_name, "John");
     }
+
+    #[test]
+    fn test_parse_message_with_caption() {
+        let json = r#"{
+            "message_id": 1,
+            "from": {"id": 1, "is_bot": false, "first_name": "A"},
+            "chat": {"id": 1, "type": "private"},
+            "caption": "What's in this image?"
+        }"#;
+        let msg: TelegramMessage = serde_json::from_str(json).unwrap();
+        assert_eq!(msg.text, None);
+        assert_eq!(msg.caption.as_deref(), Some("What's in this image?"));
+    }
 }

channels-src/telegram/telegram.capabilities.json

@@ -1,44 +1 @@
-{
+{"type":"channel","name":"telegram","description":"Telegram Bot API channel for receiving and responding to Telegram messages","capabilities":{"http":{"allowlist":[{"host":"api.telegram.org","path_prefix":"/bot"}],"credentials":{"telegram_bot":{"secret_name":"telegram_bot_token","location":{"type":"url_path","placeholder":"{TELEGRAM_BOT_TOKEN}"},"host_patterns":["api.telegram.org"]}},"rate_limit":{"requests_per_minute":30,"requests_per_hour":1000}},"secrets":{"allowed_names":["telegram_*"]},"channel":{"allowed_paths":["/webhook/telegram"],"allow_polling":true,"min_poll_interval_ms":30000,"workspace_prefix":"channels/telegram/","emit_rate_limit":{"messages_per_minute":100,"messages_per_hour":5000}}},"config":{"bot_username":null,"owner_id":null,"respond_to_all_group_messages":false,"polling_enabled":false,"poll_interval_ms":30000,"dm_policy":"pairing","allow_from":[]}}
-  "type": "channel",
-  "name": "telegram",
-  "description": "Telegram Bot API channel for receiving and responding to Telegram messages",
-  "capabilities": {
-    "http": {
-      "allowlist": [
-        { "host": "api.telegram.org", "path_prefix": "/bot" }
-      ],
-      "credentials": {
-        "telegram_bot": {
-          "secret_name": "telegram_bot_token",
-          "location": { "type": "url_path", "placeholder": "{TELEGRAM_BOT_TOKEN}" },
-          "host_patterns": ["api.telegram.org"]
-        }
-      },
-      "rate_limit": {
-        "requests_per_minute": 30,
-        "requests_per_hour": 1000
-      }
-    },
-    "secrets": {
-      "allowed_names": ["telegram_*"]
-    },
-    "channel": {
-      "allowed_paths": ["/webhook/telegram"],
-      "allow_polling": true,
-      "min_poll_interval_ms": 30000,
-      "callback_timeout_secs": 45,
-      "workspace_prefix": "channels/telegram/",
-      "emit_rate_limit": {
-        "messages_per_minute": 100,
-        "messages_per_hour": 5000
-      }
-    }
-  },
-  "config": {
-    "bot_username": null,
-    "owner_id": null,
-    "respond_to_all_group_messages": false,
-    "polling_enabled": false,
-    "poll_interval_ms": 30000
-  }
-}

docs/BUILDING_CHANNELS.md

@@ -246,13 +246,46 @@ Create `my-channel.capabilities.json`:
 
 ## Building and Deploying
 
+### Supply Chain Security: No Committed Binaries
+
+**Do not commit compiled WASM binaries.** They are a supply chain risk — the binary in a PR may not match the source. IronClaw builds channels from source:
+
+- `cargo build` automatically builds `telegram.wasm` via `build.rs`
+- The built binary is in `.gitignore` and is not committed
+- CI should run `cargo build` (or `./scripts/build-all.sh`) to produce releases
+
+**Reproducible build:**
+```bash
+cargo build --release
+```
+
+Prerequisites: `rustup target add wasm32-wasip2`, `cargo install wasm-tools` (optional; fallback copies raw WASM if unavailable).
+
+### Telegram Channel (Manual Build)
+
+```bash
+# Add WASM target if needed
+rustup target add wasm32-wasip2
+
+# Build Telegram channel
+./channels-src/telegram/build.sh
+
+# Install (or use ironclaw onboard to install bundled channel)
+mkdir -p ~/.ironclaw/channels
+cp channels-src/telegram/telegram.wasm channels-src/telegram/telegram.capabilities.json ~/.ironclaw/channels/
+```
+
+**Note**: The main IronClaw binary bundles `telegram.wasm` via `include_bytes!`. When modifying the Telegram channel source, run `./channels-src/telegram/build.sh` **before** building the main crate, so the updated WASM is included.
+
+### Other Channels
+
 ```bash
 # Build the WASM component
-cd channels/my-channel
+cd channels-src/my-channel
-cargo component build --release
+cargo build --release --target wasm32-wasip2
 
 # Deploy to ~/.ironclaw/channels/
-cp target/wasm32-wasip1/release/my_channel.wasm ~/.ironclaw/channels/my-channel.wasm
+cp target/wasm32-wasip2/release/my_channel.wasm ~/.ironclaw/channels/my-channel.wasm
 cp my-channel.capabilities.json ~/.ironclaw/channels/
 ```
 

docs/TELEGRAM_SETUP.md

@@ -0,0 +1,135 @@
+# Telegram Channel Setup
+
+This guide covers configuring the Telegram channel for IronClaw, including DM pairing for access control.
+
+## Overview
+
+The Telegram channel lets you interact with IronClaw via Telegram DMs and groups. It supports:
+
+- **Webhook mode** (recommended): Instant delivery via tunnel
+- **Polling mode**: No tunnel required; ~30s delay
+- **DM pairing**: Approve unknown users before they can message the agent
+- **Group mentions**: `@YourBot` or `/command` to trigger in groups
+
+## Prerequisites
+
+- IronClaw installed and configured (`ironclaw onboard`)
+- A Telegram bot token from [@BotFather](https://t.me/BotFather)
+
+## Quick Start
+
+### 1. Create a Bot
+
+1. Message [@BotFather](https://t.me/BotFather) on Telegram
+2. Send `/newbot` and follow the prompts
+3. Copy the bot token (e.g., `123456789:ABCdefGHIjklMNOpqrsTUVwxyz`)
+
+### 2. Configure via Setup Wizard
+
+```bash
+ironclaw onboard
+```
+
+When prompted, enable the Telegram channel and paste your bot token. The wizard will:
+
+- Validate the token
+- Optionally configure a webhook secret
+- Set up tunnel (if you want webhook mode)
+
+### 3. (Optional) Configure Tunnel for Webhooks
+
+For instant message delivery, expose your agent via a tunnel:
+
+```bash
+# ngrok
+ngrok http 8080
+
+# Cloudflare
+cloudflared tunnel --url http://localhost:8080
+```
+
+Set the tunnel URL in settings or via `TUNNEL_URL` env var. Without a tunnel, the channel uses polling (~30s delay).
+
+## DM Pairing
+
+When an unknown user DMs your bot, they receive a pairing code. You must approve them before they can message the agent.
+
+### Flow
+
+1. Unknown user sends a message to your bot
+2. Bot replies: `To pair with this bot, run: ironclaw pairing approve telegram ABC12345`
+3. You run: `ironclaw pairing approve telegram ABC12345`
+4. User is added to the allow list; future messages are delivered
+
+### Commands
+
+```bash
+# List pending pairing requests
+ironclaw pairing list telegram
+
+# List as JSON
+ironclaw pairing list telegram --json
+
+# Approve a user by code
+ironclaw pairing approve telegram ABC12345
+```
+
+### Configuration
+
+Edit `~/.ironclaw/channels/telegram.capabilities.json` (or the config injected by the host):
+
+| Option | Values | Default | Description |
+|--------|--------|---------|-------------|
+| `dm_policy` | `open`, `allowlist`, `pairing` | `pairing` | `open` = allow all; `allowlist` = config + approved only; `pairing` = allowlist + send pairing reply to unknown |
+| `allow_from` | `["user_id", "username", "*"]` | `[]` | Pre-approved IDs/usernames. `*` allows everyone. |
+| `owner_id` | Telegram user ID | `null` | When set, only this user can message (overrides dm_policy) |
+| `bot_username` | Bot username (no @) | `null` | Used for mention detection in groups; when set, only strips this mention from messages |
+| `respond_to_all_group_messages` | `true`/`false` | `false` | When true, respond to all group messages; when false, only @mentions and /commands |
+
+## Manual Installation
+
+If the channel isn't installed via the wizard:
+
+```bash
+# Build the Telegram channel (requires wasm32-wasip2 target)
+rustup target add wasm32-wasip2
+./channels-src/telegram/build.sh
+
+# Install
+mkdir -p ~/.ironclaw/channels
+cp channels-src/telegram/telegram.wasm channels-src/telegram/telegram.capabilities.json ~/.ironclaw/channels/
+```
+
+## Secrets
+
+The channel expects a secret named `telegram_bot_token`. Configure via:
+
+- **Setup wizard**: Saves to encrypted secrets store
+- **Environment**: `TELEGRAM_BOT_TOKEN=your_token`
+- **Secrets store**: `ironclaw` CLI (if available)
+
+## Webhook Secret (Optional)
+
+For webhook validation, set `telegram_webhook_secret` in secrets. Telegram will send `X-Telegram-Bot-Api-Secret-Token` with each request; the host validates it before forwarding.
+
+## Troubleshooting
+
+### Messages not delivered
+
+- **Polling mode**: Check logs for `getUpdates` errors. Ensure the bot token is valid.
+- **Webhook mode**: Verify tunnel is running and `TUNNEL_URL` is correct. Telegram requires HTTPS.
+
+### Pairing code not received
+
+- Verify the channel can send messages (HTTP allowlist includes `api.telegram.org`)
+- Check `dm_policy` is `pairing` (not `allowlist` which blocks without reply)
+
+### Group mentions not working
+
+- Set `bot_username` in config to your bot's username (e.g., `MyIronClawBot`)
+- Ensure the message contains `@YourBot` or starts with `/`
+
+### "Connection refused" when starting
+
+- For webhook mode: Start your tunnel before `ironclaw run`
+- For polling only: No tunnel needed; ignore tunnel-related warnings

scripts/build-all.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Build IronClaw and all bundled channels.
+#
+# Run this before release or when channel sources have changed.
+# The main binary bundles telegram.wasm via include_bytes!; it must exist.
+
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+echo "Building bundled channels..."
+if [ -d "channels-src/telegram" ]; then
+    ./channels-src/telegram/build.sh
+fi
+
+echo ""
+echo "Building IronClaw..."
+cargo build --release
+
+echo ""
+echo "Done. Binary: target/release/ironclaw"

src/channels/wasm/loader.rs

@@ -16,16 +16,21 @@ use crate::channels::wasm::error::WasmChannelError;
 use crate::channels::wasm::runtime::WasmChannelRuntime;
 use crate::channels::wasm::schema::ChannelCapabilitiesFile;
 use crate::channels::wasm::wrapper::WasmChannel;
+use crate::pairing::PairingStore;
 
 /// Loads WASM channels from the filesystem.
 pub struct WasmChannelLoader {
     runtime: Arc<WasmChannelRuntime>,
+    pairing_store: Arc<PairingStore>,
 }
 
 impl WasmChannelLoader {
-    /// Create a new loader with the given runtime.
+    /// Create a new loader with the given runtime and pairing store.
-    pub fn new(runtime: Arc<WasmChannelRuntime>) -> Self {
+    pub fn new(runtime: Arc<WasmChannelRuntime>, pairing_store: Arc<PairingStore>) -> Self {
-        Self { runtime }
+        Self {
+            runtime,
+            pairing_store,
+        }
     }
 
     /// Load a single WASM channel from a file pair.
@@ -114,7 +119,13 @@ impl WasmChannelLoader {
             .await?;
 
         // Create the channel
-        let channel = WasmChannel::new(self.runtime.clone(), prepared, capabilities, config_json);
+        let channel = WasmChannel::new(
+            self.runtime.clone(),
+            prepared,
+            capabilities,
+            config_json,
+            self.pairing_store.clone(),
+        );
 
         tracing::info!(
             name = name,
@@ -352,6 +363,7 @@ mod tests {
 
     use crate::channels::wasm::loader::{WasmChannelLoader, discover_channels};
     use crate::channels::wasm::runtime::{WasmChannelRuntime, WasmChannelRuntimeConfig};
+    use crate::pairing::PairingStore;
     use std::sync::Arc;
 
     #[tokio::test]
@@ -408,7 +420,7 @@ mod tests {
     async fn test_loader_invalid_name() {
         let config = WasmChannelRuntimeConfig::for_testing();
         let runtime = Arc::new(WasmChannelRuntime::new(config).unwrap());
-        let loader = WasmChannelLoader::new(runtime);
+        let loader = WasmChannelLoader::new(runtime, Arc::new(PairingStore::new()));
 
         let dir = TempDir::new().unwrap();
         let wasm_path = dir.path().join("test.wasm");

src/channels/wasm/router.rs

@@ -469,7 +469,7 @@ pub fn create_wasm_channel_router(
 }
 
 #[cfg(test)]
-mod tests {
+ mod tests {
     use std::sync::Arc;
 
     use crate::channels::wasm::capabilities::ChannelCapabilities;
@@ -478,6 +478,7 @@ mod tests {
         PreparedChannelModule, WasmChannelRuntime, WasmChannelRuntimeConfig,
     };
     use crate::channels::wasm::wrapper::WasmChannel;
+    use crate::pairing::PairingStore;
     use crate::tools::wasm::ResourceLimits;
 
     fn create_test_channel(name: &str) -> Arc<WasmChannel> {
@@ -499,6 +500,7 @@ mod tests {
             prepared,
             capabilities,
             "{}".to_string(),
+            Arc::new(PairingStore::new()),
         ))
     }
 

src/channels/wasm/wrapper.rs

@@ -43,6 +43,7 @@ use wasmtime_wasi::{ResourceTable, WasiCtx, WasiCtxBuilder, WasiView};
 use crate::channels::wasm::capabilities::ChannelCapabilities;
 use crate::channels::wasm::error::WasmChannelError;
 use crate::channels::wasm::host::{ChannelEmitRateLimiter, ChannelHostState, EmittedMessage};
+use crate::pairing::PairingStore;
 use crate::channels::wasm::router::RegisteredEndpoint;
 use crate::channels::wasm::runtime::{PreparedChannelModule, WasmChannelRuntime};
 use crate::channels::wasm::schema::ChannelConfig;
@@ -73,6 +74,8 @@ struct ChannelStoreData {
     /// Injected credentials for URL substitution (e.g., bot tokens).
     /// Keys are placeholder names like "TELEGRAM_BOT_TOKEN".
     credentials: HashMap<String, String>,
+    /// Pairing store for DM pairing (guest access control).
+    pairing_store: Arc<PairingStore>,
 }
 
 impl ChannelStoreData {
@@ -81,6 +84,7 @@ impl ChannelStoreData {
         channel_name: &str,
         capabilities: ChannelCapabilities,
         credentials: HashMap<String, String>,
+        pairing_store: Arc<PairingStore>,
     ) -> Self {
         // Create a minimal WASI context (no filesystem, no env vars for security)
         let wasi = WasiCtxBuilder::new().build();
@@ -91,6 +95,7 @@ impl ChannelStoreData {
             wasi,
             table: ResourceTable::new(),
             credentials,
+            pairing_store,
         }
     }
 
@@ -403,6 +408,43 @@ impl near::agent::channel_host::Host for ChannelStoreData {
             }
         }
     }
+
+    fn pairing_upsert_request(
+        &mut self,
+        channel: String,
+        id: String,
+        meta_json: String,
+    ) -> Result<near::agent::channel_host::PairingUpsertResult, String> {
+        let meta = if meta_json.is_empty() {
+            None
+        } else {
+            serde_json::from_str(&meta_json).ok()
+        };
+        match self.pairing_store.upsert_request(&channel, &id, meta) {
+            Ok(r) => Ok(near::agent::channel_host::PairingUpsertResult {
+                code: r.code,
+                created: r.created,
+            }),
+            Err(e) => Err(e.to_string()),
+        }
+    }
+
+    fn pairing_is_allowed(
+        &mut self,
+        channel: String,
+        id: String,
+        username: Option<String>,
+    ) -> Result<bool, String> {
+        self.pairing_store
+            .is_sender_allowed(&channel, &id, username.as_deref())
+            .map_err(|e| e.to_string())
+    }
+
+    fn pairing_read_allow_from(&mut self, channel: String) -> Result<Vec<String>, String> {
+        self.pairing_store
+            .read_allow_from(&channel)
+            .map_err(|e| e.to_string())
+    }
 }
 
 /// A WASM-based channel implementing the Channel trait.
@@ -455,6 +497,9 @@ pub struct WasmChannel {
     /// Background task that repeats typing indicators every 4 seconds.
     /// Telegram's "typing..." indicator expires after ~5s, so we refresh it.
     typing_task: RwLock<Option<tokio::task::JoinHandle<()>>>,
+
+    /// Pairing store for DM pairing (guest access control).
+    pairing_store: Arc<PairingStore>,
 }
 
 impl WasmChannel {
@@ -464,6 +509,7 @@ impl WasmChannel {
         prepared: Arc<PreparedChannelModule>,
         capabilities: ChannelCapabilities,
         config_json: String,
+        pairing_store: Arc<PairingStore>,
     ) -> Self {
         let name = prepared.name.clone();
         let rate_limiter = ChannelEmitRateLimiter::new(capabilities.emit_rate_limit.clone());
@@ -483,6 +529,7 @@ impl WasmChannel {
             endpoints: RwLock::new(Vec::new()),
             credentials: Arc::new(RwLock::new(HashMap::new())),
             typing_task: RwLock::new(None),
+            pairing_store,
         }
     }
 
@@ -564,6 +611,7 @@ impl WasmChannel {
         prepared: &PreparedChannelModule,
         capabilities: &ChannelCapabilities,
         credentials: HashMap<String, String>,
+        pairing_store: Arc<PairingStore>,
     ) -> Result<Store<ChannelStoreData>, WasmChannelError> {
         let engine = runtime.engine();
         let limits = &prepared.limits;
@@ -574,6 +622,7 @@ impl WasmChannel {
             &prepared.name,
             capabilities.clone(),
             credentials,
+            pairing_store,
         );
         let mut store = Store::new(engine, store_data);
 
@@ -674,12 +723,18 @@ impl WasmChannel {
         let timeout = self.runtime.config().callback_timeout;
         let channel_name = self.name.clone();
         let credentials = self.get_credentials().await;
+        let pairing_store = self.pairing_store.clone();
 
         // Execute in blocking task with timeout
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 // Call on_start using the generated typed interface
@@ -784,6 +839,7 @@ impl WasmChannel {
         let capabilities = self.capabilities.clone();
         let timeout = self.runtime.config().callback_timeout;
         let credentials = self.get_credentials().await;
+        let pairing_store = self.pairing_store.clone();
 
         // Prepare request data
         let method = method.to_string();
@@ -797,8 +853,13 @@ impl WasmChannel {
         // Execute in blocking task with timeout
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 // Build the WIT request type
@@ -871,12 +932,18 @@ impl WasmChannel {
         let timeout = self.runtime.config().callback_timeout;
         let channel_name = self.name.clone();
         let credentials = self.get_credentials().await;
+        let pairing_store = self.pairing_store.clone();
 
         // Execute in blocking task with timeout
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 // Call on_poll using the generated typed interface
@@ -960,6 +1027,7 @@ impl WasmChannel {
         let timeout = self.runtime.config().callback_timeout;
         let channel_name = self.name.clone();
         let credentials = self.get_credentials().await;
+        let pairing_store = self.pairing_store.clone();
 
         // Prepare response data
         let message_id_str = message_id.to_string();
@@ -973,8 +1041,13 @@ impl WasmChannel {
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
                 tracing::info!("Creating WASM store for on_respond");
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials,
+                    pairing_store,
+                )?;
 
                 tracing::info!("Instantiating WASM component for on_respond");
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
@@ -1067,13 +1140,19 @@ impl WasmChannel {
         let timeout = self.runtime.config().callback_timeout;
         let channel_name = self.name.clone();
         let credentials = self.get_credentials().await;
+        let pairing_store = self.pairing_store.clone();
 
         let wit_update = status_to_wit(status, metadata);
 
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 let channel_iface = instance.near_agent_channel();
@@ -1117,6 +1196,7 @@ impl WasmChannel {
         prepared: &Arc<PreparedChannelModule>,
         capabilities: &ChannelCapabilities,
         credentials: &RwLock<HashMap<String, String>>,
+        pairing_store: Arc<PairingStore>,
         timeout: Duration,
         wit_update: wit_channel::StatusUpdate,
     ) -> Result<(), WasmChannelError> {
@@ -1132,8 +1212,13 @@ impl WasmChannel {
 
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials_snapshot)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials_snapshot,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 let channel_iface = instance.near_agent_channel();
@@ -1201,6 +1286,7 @@ impl WasmChannel {
                 let prepared = Arc::clone(&self.prepared);
                 let capabilities = self.capabilities.clone();
                 let credentials = self.credentials.clone();
+                let pairing_store = self.pairing_store.clone();
                 let callback_timeout = self.runtime.config().callback_timeout;
                 let wit_update = status_to_wit(&status, metadata);
 
@@ -1220,6 +1306,7 @@ impl WasmChannel {
                             &prepared,
                             &capabilities,
                             &credentials,
+                            pairing_store.clone(),
                             callback_timeout,
                             wit_update_clone,
                         )
@@ -1350,6 +1437,7 @@ impl WasmChannel {
         let message_tx = self.message_tx.clone();
         let rate_limiter = self.rate_limiter.clone();
         let credentials = self.credentials.clone();
+        let pairing_store = self.pairing_store.clone();
         let callback_timeout = self.runtime.config().callback_timeout;
 
         tokio::spawn(async move {
@@ -1371,6 +1459,7 @@ impl WasmChannel {
                             &prepared,
                             &capabilities,
                             &credentials,
+                            pairing_store.clone(),
                             callback_timeout,
                         ).await;
 
@@ -1422,6 +1511,7 @@ impl WasmChannel {
         prepared: &Arc<PreparedChannelModule>,
         capabilities: &ChannelCapabilities,
         credentials: &RwLock<HashMap<String, String>>,
+        pairing_store: Arc<PairingStore>,
         timeout: Duration,
     ) -> Result<Vec<EmittedMessage>, WasmChannelError> {
         // Skip if no WASM bytes (testing mode)
@@ -1442,8 +1532,13 @@ impl WasmChannel {
         // Execute in blocking task with timeout
         let result = tokio::time::timeout(timeout, async move {
             tokio::task::spawn_blocking(move || {
-                let mut store =
+                let mut store = Self::create_store(
-                    Self::create_store(&runtime, &prepared, &capabilities, credentials_snapshot)?;
+                    &runtime,
+                    &prepared,
+                    &capabilities,
+                    credentials_snapshot,
+                    pairing_store,
+                )?;
                 let instance = Self::instantiate_component(&runtime, &prepared, &mut store)?;
 
                 // Call on_poll using the generated typed interface
@@ -1978,6 +2073,7 @@ mod tests {
     use std::sync::Arc;
 
     use crate::channels::Channel;
+    use crate::pairing::PairingStore;
     use crate::channels::wasm::capabilities::ChannelCapabilities;
     use crate::channels::wasm::runtime::{
         PreparedChannelModule, WasmChannelRuntime, WasmChannelRuntimeConfig,
@@ -1998,7 +2094,13 @@ mod tests {
 
         let capabilities = ChannelCapabilities::for_channel("test").with_path("/webhook/test");
 
-        WasmChannel::new(runtime, prepared, capabilities, "{}".to_string())
+        WasmChannel::new(
+            runtime,
+            prepared,
+            capabilities,
+            "{}".to_string(),
+            Arc::new(PairingStore::new()),
+        )
     }
 
     #[test]
@@ -2073,6 +2175,7 @@ mod tests {
             &prepared,
             &capabilities,
             &credentials,
+            Arc::new(PairingStore::new()),
             timeout,
         )
         .await;
@@ -2166,7 +2269,13 @@ mod tests {
             .with_path("/webhook/poll")
             .with_polling(1000);
 
-        let channel = WasmChannel::new(runtime, prepared, capabilities, "{}".to_string());
+        let channel = WasmChannel::new(
+            runtime,
+            prepared,
+            capabilities,
+            "{}".to_string(),
+            Arc::new(PairingStore::new()),
+        );
 
         // Start the channel
         let _stream = channel.start().await.expect("Channel should start");

src/cli/mod.rs

@@ -12,12 +12,14 @@
 mod config;
 mod mcp;
 pub mod memory;
+mod pairing;
 pub mod status;
 mod tool;
 
 pub use config::{ConfigCommand, run_config_command};
 pub use mcp::{McpCommand, run_mcp_command};
 pub use memory::{MemoryCommand, run_memory_command};
+pub use pairing::{PairingCommand, run_pairing_command, run_pairing_command_with_store};
 pub use status::run_status_command;
 pub use tool::{ToolCommand, run_tool_command};
 
@@ -86,6 +88,10 @@ pub enum Command {
     #[command(subcommand)]
     Memory(MemoryCommand),
 
+    /// DM pairing (approve inbound requests from unknown senders)
+    #[command(subcommand)]
+    Pairing(PairingCommand),
+
     /// Show system health and diagnostics
     Status,
 

src/cli/pairing.rs

@@ -0,0 +1,183 @@
+//! DM pairing CLI commands.
+//!
+//! Manage pairing requests for channels (Telegram, Slack, etc.).
+
+use clap::Subcommand;
+
+use crate::pairing::PairingStore;
+
+/// Pairing subcommands.
+#[derive(Subcommand, Debug, Clone)]
+pub enum PairingCommand {
+    /// List pending pairing requests
+    List {
+        /// Channel name (e.g., telegram, slack)
+        #[arg(required = true)]
+        channel: String,
+
+        /// Output as JSON
+        #[arg(long)]
+        json: bool,
+    },
+
+    /// Approve a pairing request by code
+    Approve {
+        /// Channel name (e.g., telegram, slack)
+        #[arg(required = true)]
+        channel: String,
+
+        /// Pairing code (e.g., ABC12345)
+        #[arg(required = true)]
+        code: String,
+    },
+}
+
+/// Run pairing CLI command.
+pub fn run_pairing_command(cmd: PairingCommand) -> Result<(), String> {
+    run_pairing_command_with_store(&PairingStore::new(), cmd)
+}
+
+/// Run pairing CLI command with a given store (for testing).
+pub fn run_pairing_command_with_store(
+    store: &PairingStore,
+    cmd: PairingCommand,
+) -> Result<(), String> {
+    match cmd {
+        PairingCommand::List { channel, json } => run_list(store, &channel, json),
+        PairingCommand::Approve { channel, code } => run_approve(store, &channel, &code),
+    }
+}
+
+fn run_list(store: &PairingStore, channel: &str, json: bool) -> Result<(), String> {
+    let requests = store.list_pending(channel).map_err(|e| e.to_string())?;
+
+    if json {
+        println!("{}", serde_json::to_string_pretty(&requests).map_err(|e| e.to_string())?);
+        return Ok(());
+    }
+
+    if requests.is_empty() {
+        println!("No pending {} pairing requests.", channel);
+        return Ok(());
+    }
+
+    println!("Pairing requests ({}):", requests.len());
+    for r in &requests {
+        let meta = r
+            .meta
+            .as_ref()
+            .and_then(|m| m.as_object())
+            .map(|o| {
+                o.iter()
+                    .filter_map(|(k, v)| {
+                        v.as_str().map(|s| format!("{}={}", k, s))
+                    })
+                    .collect::<Vec<_>>()
+                    .join(", ")
+            })
+            .unwrap_or_default();
+        println!("  {}  {}  {}  {}", r.code, r.id, meta, r.created_at);
+    }
+
+    Ok(())
+}
+
+fn run_approve(store: &PairingStore, channel: &str, code: &str) -> Result<(), String> {
+    match store.approve(channel, code) {
+        Ok(Some(entry)) => {
+            println!("Approved {} sender {}.", channel, entry.id);
+            Ok(())
+        }
+        Ok(None) => Err(format!("No pending pairing request found for code: {}", code)),
+        Err(crate::pairing::PairingStoreError::ApproveRateLimited) => Err(
+            "Too many failed approve attempts. Wait a few minutes before trying again.".to_string(),
+        ),
+        Err(e) => Err(e.to_string()),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::TempDir;
+
+    fn test_store() -> (PairingStore, TempDir) {
+        let dir = TempDir::new().unwrap();
+        let store = PairingStore::with_base_dir(dir.path().to_path_buf());
+        (store, dir)
+    }
+
+    #[test]
+    fn test_list_empty_returns_ok() {
+        let (store, _) = test_store();
+        let result = run_pairing_command_with_store(
+            &store,
+            PairingCommand::List {
+                channel: "telegram".to_string(),
+                json: false,
+            },
+        );
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_list_json_empty_returns_ok() {
+        let (store, _) = test_store();
+        let result = run_pairing_command_with_store(
+            &store,
+            PairingCommand::List {
+                channel: "telegram".to_string(),
+                json: true,
+            },
+        );
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_approve_invalid_code_returns_err() {
+        let (store, _) = test_store();
+        // Create a pending request so the pairing file exists, then approve with wrong code
+        store.upsert_request("telegram", "user1", None).unwrap();
+
+        let result = run_pairing_command_with_store(
+            &store,
+            PairingCommand::Approve {
+                channel: "telegram".to_string(),
+                code: "BADCODE1".to_string(),
+            },
+        );
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("No pending pairing request"));
+    }
+
+    #[test]
+    fn test_approve_valid_code_returns_ok() {
+        let (store, _) = test_store();
+        let r = store.upsert_request("telegram", "user1", None).unwrap();
+        assert!(r.created);
+
+        let result = run_pairing_command_with_store(
+            &store,
+            PairingCommand::Approve {
+                channel: "telegram".to_string(),
+                code: r.code,
+            },
+        );
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_list_with_pending_returns_ok() {
+        let (store, _) = test_store();
+        store.upsert_request("telegram", "user1", None).unwrap();
+
+        let result = run_pairing_command_with_store(
+            &store,
+            PairingCommand::List {
+                channel: "telegram".to_string(),
+                json: false,
+            },
+        );
+        assert!(result.is_ok());
+    }
+}

src/lib.rs

@@ -43,6 +43,7 @@ pub mod bootstrap;
 pub mod channels;
 pub mod cli;
 pub mod config;
+pub mod pairing;
 pub mod context;
 pub mod error;
 pub mod estimation;

src/main.rs

@@ -7,6 +7,7 @@ use tracing_subscriber::{EnvFilter, layer::SubscriberExt, util::SubscriberInitEx
 
 use ironclaw::{
     agent::{Agent, AgentDeps, SessionManager},
+    pairing::PairingStore,
     channels::{
         ChannelManager, GatewayChannel, HttpChannel, ReplChannel, WebhookServer,
         WebhookServerConfig,
@@ -17,7 +18,8 @@ use ironclaw::{
         web::log_layer::{LogBroadcaster, WebLogLayer},
     },
     cli::{
-        Cli, Command, run_mcp_command, run_memory_command, run_status_command, run_tool_command,
+        Cli, Command, run_mcp_command, run_memory_command, run_pairing_command, run_status_command,
+        run_tool_command,
     },
     config::Config,
     context::ContextManager,
@@ -128,6 +130,15 @@ async fn main() -> anyhow::Result<()> {
 
             return run_memory_command(mem_cmd.clone(), store.pool(), embeddings).await;
         }
+        Some(Command::Pairing(pairing_cmd)) => {
+            tracing_subscriber::fmt()
+                .with_env_filter(
+                    EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("warn")),
+                )
+                .init();
+
+            return run_pairing_command(pairing_cmd.clone()).map_err(|e| anyhow::anyhow!("{}", e));
+        }
         Some(Command::Status) => {
             let _ = dotenvy::dotenv();
             tracing_subscriber::fmt()
@@ -725,7 +736,8 @@ async fn main() -> anyhow::Result<()> {
         match WasmChannelRuntime::new(WasmChannelRuntimeConfig::default()) {
             Ok(runtime) => {
                 let runtime = Arc::new(runtime);
-                let loader = WasmChannelLoader::new(Arc::clone(&runtime));
+                let pairing_store = Arc::new(PairingStore::new());
+                let loader = WasmChannelLoader::new(Arc::clone(&runtime), pairing_store);
 
                 match loader
                     .load_from_dir(&config.channels.wasm_channels_dir)

src/pairing/mod.rs

@@ -0,0 +1,10 @@
+//! DM pairing for channels.
+//!
+//! Gates DMs from unknown senders. Only approved senders can message the agent.
+//! Unknown senders receive a pairing code and must be approved via `ironclaw pairing approve`.
+//!
+//! OpenClaw reference: src/pairing/pairing-store.ts
+
+mod store;
+
+pub use store::{PairingRequest, PairingStore, PairingStoreError};

src/pairing/store.rs

@@ -0,0 +1,669 @@
+//! Pairing store: pending requests and allowFrom list.
+//!
+//! Stored in ~/.ironclaw/{channel}-pairing.json and {channel}-allowFrom.json.
+
+use std::collections::HashSet;
+use std::fs;
+use std::io::{Seek, SeekFrom, Write};
+use std::path::PathBuf;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use fs4::FileExt;
+use rand::Rng;
+use serde::{Deserialize, Serialize};
+
+const PAIRING_CODE_LENGTH: usize = 8;
+const PAIRING_ALPHABET: &[u8] = b"ABCDEFGHJKLMNPQRSTUVWXYZ23456789";
+/// TTL for pending pairing requests (minutes, not hours — reduces brute-force window).
+const PAIRING_PENDING_TTL_SECS: u64 = 15 * 60;
+const PAIRING_PENDING_MAX: usize = 3;
+/// Max failed approve attempts per channel before rate limit kicks in.
+const PAIRING_APPROVE_RATE_LIMIT: usize = 10;
+/// Time window for rate limit (seconds).
+const PAIRING_APPROVE_RATE_WINDOW_SECS: u64 = 5 * 60;
+
+/// Error from pairing store operations.
+#[derive(Debug, thiserror::Error)]
+pub enum PairingStoreError {
+    #[error("Invalid channel: {0}")]
+    InvalidChannel(String),
+
+    #[error("IO error: {0}")]
+    Io(#[from] std::io::Error),
+
+    #[error("JSON error: {0}")]
+    Json(#[from] serde_json::Error),
+
+    #[error("Rate limit: too many failed approve attempts; try again later")]
+    ApproveRateLimited,
+}
+
+/// Result of upserting a pairing request.
+#[derive(Debug)]
+pub struct UpsertResult {
+    pub code: String,
+    pub created: bool,
+}
+
+/// A pending pairing request.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PairingRequest {
+    pub id: String,
+    pub code: String,
+    pub created_at: String,
+    pub last_seen_at: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub meta: Option<serde_json::Value>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct PairingStoreFile {
+    version: u8,
+    requests: Vec<PairingRequest>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct AllowFromStoreFile {
+    version: u8,
+    #[serde(rename = "allowFrom")]
+    allow_from: Vec<String>,
+}
+
+fn default_pairing_dir() -> PathBuf {
+    dirs::home_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join(".ironclaw")
+}
+
+fn safe_channel_key(channel: &str) -> Result<String, PairingStoreError> {
+    let raw = channel.trim().to_lowercase();
+    if raw.is_empty() {
+        return Err(PairingStoreError::InvalidChannel("empty".to_string()));
+    }
+    let safe = raw
+        .chars()
+        .map(|c| match c {
+            '\\' | '/' | ':' | '*' | '?' | '"' | '<' | '>' | '|' => '_',
+            _ => c,
+        })
+        .collect::<String>()
+        .replace("..", "_");
+    if safe.is_empty() || safe == "_" {
+        return Err(PairingStoreError::InvalidChannel(channel.to_string()));
+    }
+    Ok(safe)
+}
+
+fn pairing_path(base_dir: &PathBuf, channel: &str) -> Result<PathBuf, PairingStoreError> {
+    let key = safe_channel_key(channel)?;
+    Ok(base_dir.join(format!("{}-pairing.json", key)))
+}
+
+fn allow_from_path(base_dir: &PathBuf, channel: &str) -> Result<PathBuf, PairingStoreError> {
+    let key = safe_channel_key(channel)?;
+    Ok(base_dir.join(format!("{}-allowFrom.json", key)))
+}
+
+fn approve_attempts_path(base_dir: &PathBuf, channel: &str) -> Result<PathBuf, PairingStoreError> {
+    let key = safe_channel_key(channel)?;
+    Ok(base_dir.join(format!("{}-approve-attempts.json", key)))
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+struct ApproveAttemptsFile {
+    failed_at: Vec<u64>,
+}
+
+fn now_iso() -> String {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default();
+    #[allow(clippy::cast_possible_wrap)]
+    chrono::DateTime::from_timestamp(now.as_secs() as i64, 0)
+        .map(|dt| dt.to_rfc3339())
+        .unwrap_or_else(|| now.as_secs().to_string())
+}
+
+fn now_secs() -> u64 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map(|d| d.as_secs())
+        .unwrap_or(0)
+}
+
+fn parse_timestamp(value: &str) -> Option<u64> {
+    chrono::DateTime::parse_from_rfc3339(value)
+        .ok()
+        .map(|dt| dt.timestamp() as u64)
+        .or_else(|| value.parse::<u64>().ok())
+}
+
+fn is_expired(req: &PairingRequest, now_secs: u64) -> bool {
+    let created = parse_timestamp(&req.created_at).unwrap_or(0);
+    now_secs.saturating_sub(created) > PAIRING_PENDING_TTL_SECS
+}
+
+fn random_code() -> String {
+    let mut rng = rand::thread_rng();
+    (0..PAIRING_CODE_LENGTH)
+        .map(|_| {
+            let idx = rng.gen_range(0..PAIRING_ALPHABET.len());
+            PAIRING_ALPHABET[idx] as char
+        })
+        .collect()
+}
+
+fn generate_unique_code(existing: &HashSet<String>) -> String {
+    let mut rng = rand::thread_rng();
+    for _ in 0..500 {
+        let code = random_code();
+        if !existing.contains(&code) {
+            return code;
+        }
+    }
+    // Fallback: add suffix
+    format!("{}{:04}", random_code(), rng.gen_range(0..10000))
+}
+
+/// Pairing store for a channel.
+#[derive(Debug, Clone)]
+pub struct PairingStore {
+    base_dir: PathBuf,
+}
+
+impl PairingStore {
+    /// Create a new pairing store using default directory (~/.ironclaw).
+    pub fn new() -> Self {
+        Self {
+            base_dir: default_pairing_dir(),
+        }
+    }
+
+    /// Create a pairing store with a custom base directory (for testing).
+    pub fn with_base_dir(base_dir: PathBuf) -> Self {
+        Self { base_dir }
+    }
+
+    /// List pending pairing requests for a channel.
+    pub fn list_pending(&self, channel: &str) -> Result<Vec<PairingRequest>, PairingStoreError> {
+        let path = pairing_path(&self.base_dir, channel)?;
+        let content = match fs::read_to_string(&path) {
+            Ok(c) => c,
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+                return Ok(Vec::new());
+            }
+            Err(e) => return Err(e.into()),
+        };
+
+        let file: PairingStoreFile = serde_json::from_str(&content).unwrap_or(PairingStoreFile {
+            version: 1,
+            requests: Vec::new(),
+        });
+
+        let now = now_secs();
+        let original_len = file.requests.len();
+        let mut requests: Vec<_> = file
+            .requests
+            .into_iter()
+            .filter(|r| !is_expired(r, now))
+            .collect();
+
+        if requests.len() != original_len {
+            self.write_pairing_file(channel, &requests)?;
+        }
+
+        requests.sort_by(|a, b| a.created_at.cmp(&b.created_at));
+        Ok(requests)
+    }
+
+    /// Upsert a pairing request. Returns (code, created).
+    pub fn upsert_request(
+        &self,
+        channel: &str,
+        id: &str,
+        meta: Option<serde_json::Value>,
+    ) -> Result<UpsertResult, PairingStoreError> {
+        let path = pairing_path(&self.base_dir, channel)?;
+        fs::create_dir_all(path.parent().unwrap())?;
+
+        let mut file = fs::OpenOptions::new()
+            .read(true)
+            .write(true)
+            .create(true)
+            .truncate(false)
+            .open(&path)?;
+
+        file.lock_exclusive()?;
+
+        let content = fs::read_to_string(&path).unwrap_or_default();
+        let mut store: PairingStoreFile = serde_json::from_str(&content).unwrap_or(PairingStoreFile {
+            version: 1,
+            requests: Vec::new(),
+        });
+
+        let now = now_iso();
+        let now_secs = now_secs();
+        let id = id.trim().to_string();
+        if id.is_empty() {
+            fs4::FileExt::unlock(&file)?;
+            return Err(PairingStoreError::InvalidChannel("empty id".to_string()));
+        }
+
+        store.requests.retain(|r| !is_expired(r, now_secs));
+        let existing_codes: HashSet<String> = store
+            .requests
+            .iter()
+            .map(|r| r.code.to_uppercase())
+            .collect();
+
+        if let Some(idx) = store.requests.iter().position(|r| r.id == id) {
+            let req = &mut store.requests[idx];
+            let code = if req.code.is_empty() {
+                generate_unique_code(&existing_codes)
+            } else {
+                req.code.clone()
+            };
+            req.last_seen_at = now.clone();
+            req.code = code.clone();
+            if let Some(m) = meta {
+                req.meta = Some(m);
+            }
+            self.write_pairing_file_locked(&mut file, channel, &store.requests)?;
+            fs4::FileExt::unlock(&file)?;
+            return Ok(UpsertResult {
+                code,
+                created: false,
+            });
+        }
+
+        if store.requests.len() >= PAIRING_PENDING_MAX {
+            fs4::FileExt::unlock(&file)?;
+            return Ok(UpsertResult {
+                code: String::new(),
+                created: false,
+            });
+        }
+
+        let code = generate_unique_code(&existing_codes);
+        store.requests.push(PairingRequest {
+            id: id.clone(),
+            code: code.clone(),
+            created_at: now.clone(),
+            last_seen_at: now,
+            meta,
+        });
+
+        self.write_pairing_file_locked(&mut file, channel, &store.requests)?;
+        fs4::FileExt::unlock(&file)?;
+
+        Ok(UpsertResult { code, created: true })
+    }
+
+    fn is_approve_rate_limited(&self, channel: &str) -> Result<bool, PairingStoreError> {
+        let path = approve_attempts_path(&self.base_dir, channel)?;
+        let content = match fs::read_to_string(&path) {
+            Ok(c) => c,
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => return Ok(false),
+            Err(e) => return Err(e.into()),
+        };
+        let mut data: ApproveAttemptsFile =
+            serde_json::from_str(&content).unwrap_or_default();
+        let now = now_secs();
+        let cutoff = now.saturating_sub(PAIRING_APPROVE_RATE_WINDOW_SECS);
+        data.failed_at.retain(|&t| t >= cutoff);
+        Ok(data.failed_at.len() >= PAIRING_APPROVE_RATE_LIMIT)
+    }
+
+    fn record_failed_approve(&self, channel: &str) -> Result<(), PairingStoreError> {
+        let path = approve_attempts_path(&self.base_dir, channel)?;
+        fs::create_dir_all(path.parent().unwrap())?;
+        let file = fs::OpenOptions::new()
+            .read(true)
+            .write(true)
+            .create(true)
+            .open(&path)?;
+        file.lock_exclusive()?;
+        let content = fs::read_to_string(&path).unwrap_or_default();
+        let mut data: ApproveAttemptsFile =
+            serde_json::from_str(&content).unwrap_or_default();
+        let now = now_secs();
+        data.failed_at.push(now);
+        let cutoff = now.saturating_sub(PAIRING_APPROVE_RATE_WINDOW_SECS);
+        data.failed_at.retain(|&t| t >= cutoff);
+        let json = serde_json::to_string_pretty(&data)?;
+        fs::write(&path, json)?;
+        fs4::FileExt::unlock(&file)?;
+        Ok(())
+    }
+
+    /// Approve a pairing code and add the sender to allowFrom.
+    pub fn approve(
+        &self,
+        channel: &str,
+        code: &str,
+    ) -> Result<Option<PairingRequest>, PairingStoreError> {
+        let code = code.trim().to_uppercase();
+        if code.is_empty() {
+            return Ok(None);
+        }
+
+        if self.is_approve_rate_limited(channel)? {
+            return Err(PairingStoreError::ApproveRateLimited);
+        }
+
+        let path = pairing_path(&self.base_dir, channel)?;
+        let mut file = fs::OpenOptions::new()
+            .read(true)
+            .write(true)
+            .create(false)
+            .open(&path)
+            .map_err(|e| {
+                if e.kind() == std::io::ErrorKind::NotFound {
+                    PairingStoreError::InvalidChannel("no pairing file".to_string())
+                } else {
+                    PairingStoreError::Io(e)
+                }
+            })?;
+
+        file.lock_exclusive()?;
+
+        let content = fs::read_to_string(&path).unwrap_or_default();
+        let mut store: PairingStoreFile = serde_json::from_str(&content).unwrap_or(PairingStoreFile {
+            version: 1,
+            requests: Vec::new(),
+        });
+
+        let now_secs = now_secs();
+        store.requests.retain(|r| !is_expired(r, now_secs));
+
+        let idx = store
+            .requests
+            .iter()
+            .position(|r| r.code.to_uppercase() == code);
+
+        let entry = match idx {
+            Some(i) => store.requests.remove(i),
+            None => {
+                fs4::FileExt::unlock(&file)?;
+                self.record_failed_approve(channel)?;
+                return Ok(None);
+            }
+        };
+
+        self.write_pairing_file_locked(&mut file, channel, &store.requests)?;
+        fs4::FileExt::unlock(&file)?;
+
+        self.add_allow_from(channel, &entry.id)?;
+
+        Ok(Some(entry))
+    }
+
+    /// Read the allowFrom list for a channel.
+    pub fn read_allow_from(&self, channel: &str) -> Result<Vec<String>, PairingStoreError> {
+        let path = allow_from_path(&self.base_dir, channel)?;
+        let content = match fs::read_to_string(&path) {
+            Ok(c) => c,
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+                return Ok(Vec::new());
+            }
+            Err(e) => return Err(e.into()),
+        };
+
+        let file: AllowFromStoreFile = serde_json::from_str(&content).unwrap_or(AllowFromStoreFile {
+            version: 1,
+            allow_from: Vec::new(),
+        });
+
+        Ok(file.allow_from)
+    }
+
+    /// Check if a sender is allowed (by id or username).
+    pub fn is_sender_allowed(
+        &self,
+        channel: &str,
+        id: &str,
+        username: Option<&str>,
+    ) -> Result<bool, PairingStoreError> {
+        let allow = self.read_allow_from(channel)?;
+        let id = id.trim();
+        let id_ok = allow.iter().any(|e| e.trim() == id);
+        if id_ok {
+            return Ok(true);
+        }
+        if let Some(u) = username {
+            let u = u.trim().to_lowercase();
+            let u_norm = u.strip_prefix('@').unwrap_or(&u);
+            if allow
+                .iter()
+                .any(|e| e.trim().to_lowercase() == u || e.trim().to_lowercase() == format!("@{}", u_norm))
+            {
+                return Ok(true);
+            }
+        }
+        Ok(false)
+    }
+
+    fn add_allow_from(&self, channel: &str, entry: &str) -> Result<(), PairingStoreError> {
+        let entry = entry.trim().to_string();
+        if entry.is_empty() {
+            return Ok(());
+        }
+
+        let path = allow_from_path(&self.base_dir, channel)?;
+        fs::create_dir_all(path.parent().unwrap())?;
+
+        let file = fs::OpenOptions::new()
+            .read(true)
+            .write(true)
+            .create(true)
+            .open(&path)?;
+
+        file.lock_exclusive()?;
+
+        let content = fs::read_to_string(&path).unwrap_or_default();
+        let mut store: AllowFromStoreFile =
+            serde_json::from_str(&content).unwrap_or(AllowFromStoreFile {
+                version: 1,
+                allow_from: Vec::new(),
+            });
+
+        let normalized = entry.to_lowercase();
+        if store
+            .allow_from
+            .iter()
+            .any(|e| e.to_lowercase() == normalized)
+        {
+            fs4::FileExt::unlock(&file)?;
+            return Ok(());
+        }
+
+        store.allow_from.push(entry);
+        let json = serde_json::to_string_pretty(&store)?;
+        fs::write(&path, json)?;
+
+        fs4::FileExt::unlock(&file)?;
+        Ok(())
+    }
+
+    fn write_pairing_file(
+        &self,
+        channel: &str,
+        requests: &[PairingRequest],
+    ) -> Result<(), PairingStoreError> {
+        let path = pairing_path(&self.base_dir, channel)?;
+        let mut file = fs::OpenOptions::new()
+            .write(true)
+            .create(true)
+            .truncate(true)
+            .open(&path)?;
+        file.lock_exclusive()?;
+        self.write_pairing_file_locked(&mut file, channel, requests)?;
+        fs4::FileExt::unlock(&file)?;
+        Ok(())
+    }
+
+    fn write_pairing_file_locked(
+        &self,
+        file: &mut fs::File,
+        _channel: &str,
+        requests: &[PairingRequest],
+    ) -> Result<(), PairingStoreError> {
+        let store = PairingStoreFile {
+            version: 1,
+            requests: requests.to_vec(),
+        };
+        let json = serde_json::to_string_pretty(&store)?;
+        file.set_len(0)?;
+        file.seek(SeekFrom::Start(0))?;
+        file.write_all(json.as_bytes())?;
+        file.sync_all()?;
+        Ok(())
+    }
+}
+
+impl Default for PairingStore {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::TempDir;
+
+    #[test]
+    fn test_safe_channel_key() {
+        assert_eq!(safe_channel_key("telegram").unwrap(), "telegram");
+        assert_eq!(safe_channel_key("Telegram").unwrap(), "telegram");
+        safe_channel_key("").unwrap_err();
+    }
+
+    #[test]
+    fn test_random_code() {
+        let c = random_code();
+        assert_eq!(c.len(), PAIRING_CODE_LENGTH);
+        assert!(c.chars().all(|c| PAIRING_ALPHABET.contains(&(c as u8))));
+    }
+
+    fn test_store() -> (PairingStore, TempDir) {
+        let dir = TempDir::new().unwrap();
+        let store = PairingStore::with_base_dir(dir.path().to_path_buf());
+        (store, dir)
+    }
+
+    #[test]
+    fn test_list_pending_empty() {
+        let (store, _) = test_store();
+        let requests = store.list_pending("telegram").unwrap();
+        assert!(requests.is_empty());
+    }
+
+    #[test]
+    fn test_upsert_request_creates_new() {
+        let (store, _) = test_store();
+        let result = store
+            .upsert_request("telegram", "user123", Some(serde_json::json!({"chat_id": 456})))
+            .unwrap();
+        assert!(result.created);
+        assert_eq!(result.code.len(), PAIRING_CODE_LENGTH);
+        assert!(result.code.chars().all(|c| PAIRING_ALPHABET.contains(&(c as u8))));
+    }
+
+    #[test]
+    fn test_upsert_request_updates_existing() {
+        let (store, _) = test_store();
+        let r1 = store.upsert_request("telegram", "user123", None).unwrap();
+        assert!(r1.created);
+        let r2 = store.upsert_request("telegram", "user123", Some(serde_json::json!({"x": 1}))).unwrap();
+        assert!(!r2.created);
+        assert_eq!(r1.code, r2.code);
+
+        let pending = store.list_pending("telegram").unwrap();
+        assert_eq!(pending.len(), 1);
+        assert_eq!(pending[0].id, "user123");
+        assert_eq!(pending[0].meta, Some(serde_json::json!({"x": 1})));
+    }
+
+    #[test]
+    fn test_approve_adds_to_allow_from() {
+        let (store, _) = test_store();
+        let r = store.upsert_request("telegram", "user456", None).unwrap();
+        assert!(r.created);
+
+        let approved = store.approve("telegram", &r.code).unwrap();
+        assert!(approved.is_some());
+        assert_eq!(approved.unwrap().id, "user456");
+
+        let allow = store.read_allow_from("telegram").unwrap();
+        assert_eq!(allow, vec!["user456"]);
+    }
+
+    #[test]
+    fn test_approve_case_insensitive_code() {
+        let (store, _) = test_store();
+        let r = store.upsert_request("telegram", "user789", None).unwrap();
+        let code_lower = r.code.to_lowercase();
+        let approved = store.approve("telegram", &code_lower).unwrap();
+        assert!(approved.is_some());
+    }
+
+    #[test]
+    fn test_approve_invalid_code_returns_none() {
+        let (store, _) = test_store();
+        store.upsert_request("telegram", "user123", None).unwrap();
+        let approved = store.approve("telegram", "BADCODE1").unwrap();
+        assert!(approved.is_none());
+    }
+
+    #[test]
+    fn test_approve_rate_limited_after_many_failures() {
+        let (store, _) = test_store();
+        store.upsert_request("telegram", "user123", None).unwrap();
+        for _ in 0..PAIRING_APPROVE_RATE_LIMIT {
+            let _ = store.approve("telegram", "WRONG01");
+        }
+        let err = store.approve("telegram", "WRONG02").unwrap_err();
+        assert!(matches!(err, PairingStoreError::ApproveRateLimited));
+    }
+
+    #[test]
+    fn test_is_sender_allowed_by_id() {
+        let (store, _) = test_store();
+        let r = store.upsert_request("telegram", "user999", None).unwrap();
+        store.approve("telegram", &r.code).unwrap();
+
+        assert!(store.is_sender_allowed("telegram", "user999", None).unwrap());
+        assert!(!store.is_sender_allowed("telegram", "other", None).unwrap());
+    }
+
+    #[test]
+    fn test_is_sender_allowed_by_username() {
+        let (store, _) = test_store();
+        store.upsert_request("telegram", "alice", Some(serde_json::json!({"username": "alice"}))).unwrap();
+        let pending = store.list_pending("telegram").unwrap();
+        store.approve("telegram", &pending[0].code).unwrap();
+
+        // approve adds id to allow_from. For username we need to add it manually.
+        // Actually approve adds entry.id which is "alice". So is_sender_allowed("telegram", "alice", None) would work.
+        assert!(store.is_sender_allowed("telegram", "alice", None).unwrap());
+        assert!(store.is_sender_allowed("telegram", "alice", Some("alice")).unwrap());
+    }
+
+    #[test]
+    fn test_channel_normalization() {
+        let (store, _) = test_store();
+        store.upsert_request("Telegram", "u1", None).unwrap();
+        let pending = store.list_pending("telegram").unwrap();
+        assert_eq!(pending.len(), 1);
+        assert_eq!(pending[0].id, "u1");
+    }
+
+    #[test]
+    fn test_invalid_channel_rejected() {
+        let (store, _) = test_store();
+        store.upsert_request("telegram", "u1", None).unwrap();
+        store.list_pending("").unwrap_err();
+        store.upsert_request("", "u1", None).unwrap_err();
+    }
+}

tests/pairing_integration.rs

@@ -0,0 +1,112 @@
+//! Integration tests for the DM pairing flow.
+//!
+//! Verifies the full pairing lifecycle: upsert → list → approve → allowFrom → is_sender_allowed.
+//! Uses temp directory for isolation.
+
+use ironclaw::cli::{run_pairing_command_with_store, PairingCommand};
+use ironclaw::pairing::PairingStore;
+use tempfile::TempDir;
+
+fn test_store() -> (PairingStore, TempDir) {
+    let dir = TempDir::new().unwrap();
+    let store = PairingStore::with_base_dir(dir.path().to_path_buf());
+    (store, dir)
+}
+
+#[test]
+fn test_pairing_flow_unknown_user_to_approved() {
+    let (store, _) = test_store();
+    let channel = "telegram";
+
+    // 1. Unknown user sends first message -> upsert creates request
+    let r1 = store.upsert_request(channel, "user_12345", Some(serde_json::json!({
+        "chat_id": 999,
+        "username": "alice"
+    }))).unwrap();
+    assert!(r1.created);
+    assert!(!r1.code.is_empty());
+    assert_eq!(r1.code.len(), 8);
+
+    // 2. List pending shows the request
+    let pending = store.list_pending(channel).unwrap();
+    assert_eq!(pending.len(), 1);
+    assert_eq!(pending[0].id, "user_12345");
+    assert_eq!(pending[0].code, r1.code);
+
+    // 3. User is not allowed yet
+    assert!(!store.is_sender_allowed(channel, "user_12345", Some("alice")).unwrap());
+
+    // 4. Approve via code
+    let approved = store.approve(channel, &r1.code).unwrap();
+    assert!(approved.is_some());
+    assert_eq!(approved.unwrap().id, "user_12345");
+
+    // 5. User is now allowed
+    assert!(store.is_sender_allowed(channel, "user_12345", None).unwrap());
+    assert!(store.is_sender_allowed(channel, "user_12345", Some("alice")).unwrap());
+
+    // 6. Pending list is empty
+    let pending_after = store.list_pending(channel).unwrap();
+    assert!(pending_after.is_empty());
+
+    // 7. allowFrom contains the user
+    let allow = store.read_allow_from(channel).unwrap();
+    assert_eq!(allow, vec!["user_12345"]);
+}
+
+#[test]
+fn test_pairing_flow_cli_approve() {
+    let (store, _) = test_store();
+    store.upsert_request("telegram", "user_999", None).unwrap();
+    let pending = store.list_pending("telegram").unwrap();
+    let code = pending[0].code.clone();
+
+    let result = run_pairing_command_with_store(
+        &store,
+        PairingCommand::Approve {
+            channel: "telegram".to_string(),
+            code,
+        },
+    );
+    assert!(result.is_ok());
+    assert!(store.is_sender_allowed("telegram", "user_999", None).unwrap());
+}
+
+#[test]
+fn test_pairing_reject_invalid_code() {
+    let (store, _) = test_store();
+    store.upsert_request("telegram", "user_1", None).unwrap();
+
+    let result = store.approve("telegram", "INVALID1");
+    assert!(result.unwrap().is_none());
+
+    let result = run_pairing_command_with_store(
+        &store,
+        PairingCommand::Approve {
+            channel: "telegram".to_string(),
+            code: "BADCODE1".to_string(),
+        },
+    );
+    assert!(result.is_err());
+}
+
+#[test]
+fn test_pairing_multiple_channels_isolated() {
+    let (store, _) = test_store();
+
+    let r_telegram = store.upsert_request("telegram", "user_a", None).unwrap();
+    let r_slack = store.upsert_request("slack", "user_b", None).unwrap();
+
+    // Each channel has its own pending
+    assert_eq!(store.list_pending("telegram").unwrap().len(), 1);
+    assert_eq!(store.list_pending("slack").unwrap().len(), 1);
+
+    // Approve in one channel doesn't affect the other
+    store.approve("telegram", &r_telegram.code).unwrap();
+    assert!(store.is_sender_allowed("telegram", "user_a", None).unwrap());
+    assert!(!store.is_sender_allowed("slack", "user_a", None).unwrap());
+
+    store.approve("slack", &r_slack.code).unwrap();
+    assert!(store.is_sender_allowed("slack", "user_b", None).unwrap());
+}
+

tests/wasm_channel_integration.rs

@@ -10,6 +10,7 @@ use std::collections::HashMap;
 use std::sync::Arc;
 
 use ironclaw::channels::Channel;
+use ironclaw::pairing::PairingStore;
 use ironclaw::channels::wasm::{
     ChannelCapabilities, EmitRateLimitConfig, PreparedChannelModule, RegisteredEndpoint,
     WasmChannel, WasmChannelRouter, WasmChannelRuntime, WasmChannelRuntimeConfig,
@@ -38,7 +39,13 @@ fn create_test_channel(
         capabilities = capabilities.with_path(path.to_string());
     }
 
-    WasmChannel::new(runtime, prepared, capabilities, "{}".to_string())
+    WasmChannel::new(
+        runtime,
+        prepared,
+        capabilities,
+        "{}".to_string(),
+        Arc::new(PairingStore::new()),
+    )
 }
 
 mod router_tests {

wit/channel.wit

@@ -147,6 +147,32 @@ interface channel-host {
     /// - Path validation fails (traversal attempt, absolute path)
     /// - Write operation fails
     workspace-write: func(path: string, content: string) -> result<_, string>;
+
+    // ==================== DM Pairing ====================
+
+    /// Result of upserting a pairing request.
+    record pairing-upsert-result {
+        code: string,
+        created: bool,
+    }
+
+    /// Upsert a pairing request for an unknown sender.
+    /// Returns (code, created). When created is true, the channel should send a pairing reply.
+    pairing-upsert-request: func(
+        channel: string,
+        id: string,
+        meta-json: string
+    ) -> result<pairing-upsert-result, string>;
+
+    /// Check if a sender is allowed (in allowFrom store).
+    pairing-is-allowed: func(
+        channel: string,
+        id: string,
+        username: option<string>
+    ) -> result<bool, string>;
+
+    /// Read the allowFrom list (for merging with config allowFrom).
+    pairing-read-allow-from: func(channel: string) -> result<list<string>, string>;
 }
 
 /// Channel interface that sandboxed channels must implement.