diff --git a/src/skills/telegram/SKILL.md b/src/skills/telegram/SKILL.md
index dcb0f8c5..73d2f100 100644
--- a/src/skills/telegram/SKILL.md
+++ b/src/skills/telegram/SKILL.md
@@ -5,6 +5,7 @@ description: |
   Use when Bub needs to: (1) Send a message to a Telegram user/group/channel,
   (2) Reply to a specific Telegram message with reply_to_message_id,
   (3) Edit an existing Telegram message, or (4) Push proactive Telegram notifications.
+  Prefer rich formatted messages (headings, lists, tables, blockquotes, math, collapsible details, captioned media) over plain markdown whenever the content is more than one short paragraph.
 metadata:
   channel: telegram
 ---
@@ -25,13 +26,45 @@ Collect these before execution:
 - message content (required for send/edit)
 - `reply_to_message_id` (required when you need a threaded reply)
 
+## Rich Messages (Bot API 10.1+, June 2026) — **PREFERRED**
+
+For any message that benefits from structured formatting — headings, bullet/numbered lists, tables, blockquotes, collapsible `<details>`, captioned media, math blocks, code blocks with language hints, or mixed media — use the dedicated `telegram_rich.py` script with `rich-html-style` markup. This is the **first-choice** path; fall back to plain markdown (`telegram_send.py`) only for short single-paragraph replies.
+
+The Rich Message API uses `sendRichMessage` and `editMessageText` with a `rich_message` payload. Exactly one of `html` or `markdown` must be supplied. Supported HTML tags include `<b>`, `<i>`, `<u>`, `<s>`, `<tg-spoiler>`, `<code>`, `<pre>`, `<mark>`, `<sub>`, `<sup>`, `<h1>`-`<h6>`, `<p>`, `<ul>`/`<ol>`/`<li>`, `<blockquote>`, `<aside>`, `<details>`/`<summary>`, `<table>`, `<figure>`/`<figcaption>`, `<img>`/`<video>`/`<audio>`, `<tg-collage>`, `<tg-slideshow>`, `<tg-map>`, `<tg-math>`, `<tg-math-block>`, `<tg-reference>`, `<tg-emoji>`, `<tg-time>`. Full reference: https://core.telegram.org/bots/api#rich-html-style
+
+```bash
+# Send rich message (HTML)
+uv run ./scripts/telegram_rich.py \
+  --chat-id <CHAT_ID> \
+  --html "<h2>Title</h2><p>Body with <b>bold</b> and <code>code</code>.</p>"
+
+# Send rich message (HTML from heredoc via file)
+uv run ./scripts/telegram_rich.py \
+  --chat-id <CHAT_ID> \
+  --html-file /tmp/payload.html \
+  --reply-to <MESSAGE_ID>
+
+# Send rich message (Markdown instead of HTML)
+uv run ./scripts/telegram_rich.py \
+  --chat-id <CHAT_ID> \
+  --markdown "## Title\n\n- item one\n- item two"
+
+# Edit an existing message to become a rich message
+uv run ./scripts/telegram_rich.py \
+  --chat-id <CHAT_ID> \
+  --edit <MESSAGE_ID> \
+  --html "<p>Updated content.</p>"
+```
+
+For multi-line rich HTML, prefer `--html-file` over passing the payload on the command line to avoid shell escaping pitfalls. The script reads the file as UTF-8 and strips a single trailing newline.
+
 ## Execution Policy
 
-1. If handling a Telegram message and `message_id` is known, send a reply message with `--reply-to`.
-2. If there is no message to reply to, send a normal message to `chat_id`.
+1. If handling a direct user message in Telegram and `message_id` is known, send a reply message (`--reply-to`).
+2. If source metadata says sender is a bot (`sender_is_bot=true`), do not use reply mode, but send a normal message and prefix content with `@<sender_username>` (or the provided source username). If the user doesn't have a username, use `--source-user-id` to mention via `tg://user?id=` link.
 3. For long-running tasks, optionally send one progress message, then edit that same message for final status.
 4. **ALWAYS pass message content via stdin using heredoc pipe and `--message -` (or `--text -`).** NEVER embed message text directly in shell arguments — special characters like `'`, `"`, `$`, `!` will be mangled or cause syntax errors.
-5. Avoid emitting HTML tags in message content; use Markdown for formatting instead.
+5. **Prefer `telegram_rich.py` (rich-html-style) over `telegram_send.py` for anything beyond a single short paragraph.** See the "Rich Messages" section above.
 
 ## Bot to co-Bot Communication
 
@@ -88,6 +121,16 @@ cat << 'EOF' | uv run ${SKILL_DIR}/scripts/telegram_send.py --chat-id <CHAT_ID>
 Reply content here.
 EOF
 
+# Source message sender is bot: no direct reply, use @username style
+cat << 'EOF' | uv run ${SKILL_DIR}/scripts/telegram_send.py --chat-id <CHAT_ID> --token "$BUB_TELEGRAM_TOKEN" --source-is-bot --source-username <USERNAME> --message -
+Message to a bot using @username mention.
+EOF
+
+# Source message sender is bot without username: use tg://user?id= link
+cat << 'EOF' | uv run ${SKILL_DIR}/scripts/telegram_send.py --chat-id <CHAT_ID> --token "$BUB_TELEGRAM_TOKEN" --source-is-bot --source-user-id <USER_ID> --source-display-name "Display Name" --message -
+Message to a user/bot using tg://user?id= mention.
+EOF
+
 # Edit an existing message
 cat << 'EOF' | uv run ${SKILL_DIR}/scripts/telegram_edit.py --chat-id <CHAT_ID> --token "$BUB_TELEGRAM_TOKEN" --message-id <MESSAGE_ID> --text -
 Updated content here.
@@ -100,12 +143,30 @@ For other actions that not covered by these scripts, use `curl` to call Telegram
 
 ## Script Interface Reference
 
+### `telegram_rich.py` (preferred for structured messages)
+
+- `--chat-id`, `-c`: required
+- `--html`: rich message content as HTML
+- `--html-file`: read rich message HTML from a file (preferred for multi-line payloads)
+- `--markdown`: rich message content as Markdown
+- `--markdown-file`: read rich message Markdown from a file
+- `--rtl`: render right-to-left
+- `--skip-entity-detection`: skip URL/email/mention auto-detection
+- `--reply-to`, `-r`: optional message ID to reply to
+- `--disable-notification`: send silently
+- `--edit MESSAGE_ID`: edit an existing message instead of sending
+- `--token`, `-t`: optional (normally not needed)
+
 ### `telegram_send.py`
 
 - `--chat-id`, `-c`: required, supports comma-separated ids
 - `--message`, `-m`: required (use `-` to read from stdin)
 - `--reply-to`, `-r`: optional
 - `--token`, `-t`: optional (normally not needed)
+- `--source-is-bot`: optional flag, disables reply mode and adds mention prefix
+- `--source-username`: optional, uses `@username` style mention when set
+- `--source-user-id`: optional, uses `tg://user?id=` link mention when username is not available
+- `--source-display-name`: optional, display name for user ID mention (defaults to "User")
 
 ### `telegram_edit.py`
 
@@ -113,3 +174,11 @@ For other actions that not covered by these scripts, use `curl` to call Telegram
 - `--message-id`, `-m`: required
 - `--text`, `-t`: required (use `-` to read from stdin)
 - `--token`: optional (normally not needed)
+
+### Bot to co-Bot Communication
+
+In Telegram groups, communicate with another bot using only these patterns:
+
+1. Reply directly to the other bot's message when `message_id` is available.
+2. Use an explicit command mention such as `/command@OtherBot` when you need to invoke that bot intentionally.
+3. Do not assume free-form group text will reach another bot.
diff --git a/src/skills/telegram/scripts/telegram_rich.py b/src/skills/telegram/scripts/telegram_rich.py
new file mode 100755
index 00000000..953b215a
--- /dev/null
+++ b/src/skills/telegram/scripts/telegram_rich.py
@@ -0,0 +1,224 @@
+#!/usr/bin/env uv run
+# /// script
+# requires-python = ">=3.10"
+# dependencies = [
+#     "requests>=2.31.0",
+# ]
+# ///
+
+"""
+Telegram Bot Rich Message Sender
+
+Sends rich formatted messages via the Bot API 10.1 (June 2026) `sendRichMessage`
+endpoint using the `rich-html-style` markup.
+
+Use this script as the **preferred** path whenever the message benefits from
+structured formatting (headings, lists, tables, blockquotes, collapsible
+details, math, captioned figures, etc.). Fall back to `telegram_send.py`
+(plain markdown) only for short single-paragraph replies.
+"""
+
+import argparse
+import json
+import os
+import sys
+
+import requests
+
+
+def send_rich_message(
+    bot_token: str,
+    chat_id: str,
+    html: str | None = None,
+    markdown: str | None = None,
+    is_rtl: bool = False,
+    skip_entity_detection: bool = False,
+    reply_to_message_id: int | None = None,
+    disable_notification: bool | None = None,
+) -> dict:
+    """
+    Call `sendRichMessage` on the Bot API.
+
+    Exactly one of `html` or `markdown` must be supplied.
+
+    Returns:
+        API response as dict
+    """
+    if (html is None) == (markdown is None):
+        raise ValueError("Exactly one of --html or --markdown must be supplied")
+
+    url = f"https://api.telegram.org/bot{bot_token}/sendRichMessage"
+
+    rich_message: dict = {}
+    if html is not None:
+        rich_message["html"] = html
+    if markdown is not None:
+        rich_message["markdown"] = markdown
+    if is_rtl:
+        rich_message["is_rtl"] = True
+    if skip_entity_detection:
+        rich_message["skip_entity_detection"] = True
+
+    payload: dict = {
+        "chat_id": chat_id,
+        "rich_message": json.dumps(rich_message, ensure_ascii=False),
+    }
+    if reply_to_message_id is not None:
+        payload["reply_to_message_id"] = reply_to_message_id
+    if disable_notification is not None:
+        payload["disable_notification"] = disable_notification
+
+    response = requests.post(url, json=payload, timeout=30)
+    if response.status_code == 400 and reply_to_message_id is not None:
+        # Some channels don't accept threaded replies; retry without it.
+        payload.pop("reply_to_message_id", None)
+        response = requests.post(url, json=payload, timeout=30)
+    response.raise_for_status()
+    return response.json()
+
+
+def edit_rich_message(
+    bot_token: str,
+    chat_id: str,
+    message_id: int,
+    html: str | None = None,
+    markdown: str | None = None,
+    is_rtl: bool = False,
+) -> dict:
+    """Edit an existing message in-place to a rich message."""
+    if (html is None) == (markdown is None):
+        raise ValueError("Exactly one of --html or --markdown must be supplied")
+
+    url = f"https://api.telegram.org/bot{bot_token}/editMessageText"
+
+    rich_message: dict = {}
+    if html is not None:
+        rich_message["html"] = html
+    if markdown is not None:
+        rich_message["markdown"] = markdown
+    if is_rtl:
+        rich_message["is_rtl"] = True
+
+    payload: dict = {
+        "chat_id": chat_id,
+        "message_id": message_id,
+        "rich_message": json.dumps(rich_message, ensure_ascii=False),
+    }
+    response = requests.post(url, json=payload, timeout=30)
+    response.raise_for_status()
+    return response.json()
+
+
+def read_payload_from_file(path: str) -> str:
+    with open(path, "r", encoding="utf-8") as f:
+        return f.read().rstrip("\n")
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Send rich formatted messages via Bot API 10.1 sendRichMessage (rich-html-style)",
+    )
+    parser.add_argument("--chat-id", "-c", required=True, help="Target chat ID")
+    parser.add_argument(
+        "--html",
+        help="Rich message content as HTML. Mutually exclusive with --markdown.",
+    )
+    parser.add_argument(
+        "--markdown",
+        help="Rich message content as Markdown. Mutually exclusive with --html.",
+    )
+    parser.add_argument(
+        "--html-file",
+        help="Read rich message HTML from a file (useful for heredoc payloads).",
+    )
+    parser.add_argument(
+        "--markdown-file",
+        help="Read rich message Markdown from a file (useful for heredoc payloads).",
+    )
+    parser.add_argument(
+        "--rtl",
+        action="store_true",
+        help="Render the message right-to-left.",
+    )
+    parser.add_argument(
+        "--skip-entity-detection",
+        action="store_true",
+        help="Skip auto-detection of URLs/emails/mentions in the text.",
+    )
+    parser.add_argument(
+        "--reply-to",
+        "-r",
+        type=int,
+        help="Message ID to reply to (creates threaded conversation).",
+    )
+    parser.add_argument(
+        "--disable-notification",
+        action="store_true",
+        help="Send silently.",
+    )
+    parser.add_argument(
+        "--edit",
+        type=int,
+        metavar="MESSAGE_ID",
+        help="Edit an existing message instead of sending a new one.",
+    )
+    parser.add_argument(
+        "--token",
+        "-t",
+        help="Bot token (defaults to $BUB_TELEGRAM_TOKEN env var).",
+    )
+
+    args = parser.parse_args()
+
+    bot_token = args.token or os.environ.get("BUB_TELEGRAM_TOKEN")
+    if not bot_token:
+        print("❌ Error: Bot token required. Set BUB_TELEGRAM_TOKEN env var or use --token")
+        sys.exit(1)
+
+    html = args.html
+    markdown = args.markdown
+    if args.html_file:
+        html = read_payload_from_file(args.html_file)
+    if args.markdown_file:
+        markdown = read_payload_from_file(args.markdown_file)
+
+    if (html is None) == (markdown is None):
+        print("❌ Error: supply exactly one of --html, --html-file, --markdown, --markdown-file")
+        sys.exit(1)
+
+    try:
+        if args.edit is not None:
+            result = edit_rich_message(
+                bot_token=bot_token,
+                chat_id=args.chat_id,
+                message_id=args.edit,
+                html=html,
+                markdown=markdown,
+                is_rtl=args.rtl,
+            )
+            print(f"✅ Rich message edited (message_id = {args.edit})")
+        else:
+            result = send_rich_message(
+                bot_token=bot_token,
+                chat_id=args.chat_id,
+                html=html,
+                markdown=markdown,
+                is_rtl=args.rtl,
+                skip_entity_detection=args.skip_entity_detection,
+                reply_to_message_id=args.reply_to,
+                disable_notification=args.disable_notification or None,
+            )
+            mid = result.get("result", {}).get("message_id")
+            print(f"✅ Rich message sent successfully to {args.chat_id} (message_id = {mid})")
+    except requests.HTTPError as e:
+        print(f"❌ HTTP Error: {e}")
+        body = e.response.text if e.response is not None else ""
+        print(f"   Response: {body[:1000]}")
+        sys.exit(1)
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/src/skills/telegram/scripts/telegram_send.py b/src/skills/telegram/scripts/telegram_send.py
index 6ebfc10e..11493240 100755
--- a/src/skills/telegram/scripts/telegram_send.py
+++ b/src/skills/telegram/scripts/telegram_send.py
@@ -118,6 +118,14 @@ def send_message(
     return response.json()
 
 
+def escape_markdown_v2(text: str) -> str:
+    """
+    Escape special characters for Telegram MarkdownV2 format.
+    """
+    escape_chars = r'_*[]()~`>#+-=|{}.!'
+    return ''.join('\\' + char if char in escape_chars else char for char in text)
+
+
 def main():
     parser = argparse.ArgumentParser(description="Send messages via Telegram Bot API (auto-converts to MarkdownV2)")
     parser.add_argument("--chat-id", "-c", required=True, help="Target chat ID")
@@ -138,6 +146,14 @@ def main():
         "--source-username",
         help="Source username for @username prefix when --source-is-bot is enabled",
     )
+    parser.add_argument(
+        "--source-user-id",
+        help="Source user ID for mention when username is not available (uses tg://user?id= link)",
+    )
+    parser.add_argument(
+        "--source-display-name",
+        help="Display name for user ID mention (defaults to 'User')",
+    )
 
     args = parser.parse_args()
 
@@ -150,13 +166,24 @@ def main():
     # Parse chat IDs
     chat_id = args.chat_id.strip()
     reply_to = args.reply_to
+
+    # Read message from stdin if "-" was passed, otherwise use the inline value.
     message = sys.stdin.read() if args.message == "-" else args.message
 
+    # Handle source-is-bot mode: prefix the message with a mention so the bot picks it up.
     if args.source_is_bot and not reply_to and not message.startswith("/"):
-        if not args.source_username:
-            print("❌ Error: --source-username is required when --source-is-bot is set without --reply-to")
+        if args.source_user_id:
+            # Use tg://user?id= link for mention (works without username)
+            display_name = args.source_display_name or "User"
+            escaped_name = escape_markdown_v2(display_name)
+            mention = f"[{escaped_name}](tg://user?id={args.source_user_id})"
+            message = f"{mention}\n\n{message}"
+        elif args.source_username:
+            # Fall back to explicit /bot@username command mention
+            message = f"/bot@{args.source_username} {message}"
+        else:
+            print("❌ Error: --source-username or --source-user-id is required when --source-is-bot is set without --reply-to")
             sys.exit(1)
-        message = f"/bot@{args.source_username} {message}"
 
     # Send messages
     try: