Telegram News Skill (Read-Only)

Reads Telegram channels and groups for financial news and market research using tdl, a Telegram CLI tool.

This skill is read-only. It is designed for financial research: reading channel messages, monitoring financial news channels, and exporting message history. It does NOT support sending messages, joining/leaving channels, or any write operations.

Step 1: Ensure tdl Is Installed

Current environment status:

!`(command -v tdl && tdl version 2>&1 | head -3 || echo "TDL_NOT_INSTALLED") 2>/dev/null`

If the status above shows a version number, tdl is installed — skip to Step 2.

If TDL_NOT_INSTALLED, install tdl based on the user's platform:

Platform

Install Command

macOS / Linux

curl -sSL https://docs.iyear.me/tdl/install.sh | sudo bash

macOS (Homebrew)

brew install telegram-downloader

Linux (Termux)

pkg install tdl

Linux (AUR)

yay -S tdl

Linux (Nix)

nix-env -iA nixos.tdl

Go (any platform)

go install github.com/iyear/tdl@latest

Ask the user which installation method they prefer. Default to Homebrew on macOS, curl script on Linux.

Step 2: Ensure tdl Is Authenticated

Current auth status:

!`(tdl chat ls --limit 1 2>&1 >/dev/null && echo "AUTH_OK" || echo "AUTH_NEEDED") 2>/dev/null`

If AUTH_OK, skip to Step 3.

If AUTH_NEEDED, guide the user through login. Login requires interactive input — the user must enter their phone number and verification code manually.

Login methods

Method A: QR Code (recommended — fastest)

tdl login -T qr

A QR code will be displayed in the terminal. The user scans it with their Telegram mobile app (Settings > Devices > Link Desktop Device).

Method B: Phone + Code

tdl login -T code

The user enters their phone number, then the verification code sent to their Telegram app.

Method C: Import from Telegram Desktop

If the user has Telegram Desktop installed and logged in:

tdl login

This imports the session from the existing desktop client. The desktop client must be from the official website, NOT from the App Store or Microsoft Store.

Namespaces

By default, tdl uses a default namespace. To manage multiple accounts:

tdl login -n work -T qr      # Login to "work" namespace

tdl chat ls -n work           # Use "work" namespace for commands

Important login notes

• Login is a one-time operation. The session persists on disk after successful login.

• If login fails, ask the user to check their internet connection and try again.

• Never ask for or handle Telegram passwords/2FA codes programmatically — always let the user enter them interactively.

Step 3: Identify What the User Needs

Match the user's request to one of the read operations below.

User Request

Command

Key Flags

List all chats/channels

tdl chat ls

-o json, -f "FILTER"

List only channels

tdl chat ls -f "Type contains 'channel'"

-o json

Export recent messages

tdl chat export -c CHAT -T last -i N

--all, --with-content

Export messages by time range

tdl chat export -c CHAT -T time -i START,END

--all, --with-content

Export messages by ID range

tdl chat export -c CHAT -T id -i FROM,TO

--all, --with-content

Export from a topic/thread

tdl chat export -c CHAT --topic TOPIC_ID

--all, --with-content

Search for a channel by name

tdl chat ls -f "VisibleName contains 'NAME'"

-o json

Chat identifiers

The -c flag accepts multiple formats:

Format

Example

Username (with @)

-c @channel_name

Username (without @)

-c channel_name

Numeric chat ID

-c 123456789

Public link

-c https://t.me/channel_name

Phone number

-c "+1 123456789"

Saved Messages

-c "" (empty)

Step 4: Execute the Command

Listing chats

# List all chats

tdl chat ls

# JSON output for processing

tdl chat ls -o json

# Filter for channels only

tdl chat ls -f "Type contains 'channel'"

# Search by name

tdl chat ls -f "VisibleName contains 'Bloomberg'"

Exporting messages

Always use --all --with-content to get text messages (not just media):

# Last 20 messages from a channel

tdl chat export -c @channel_name -T last -i 20 --all --with-content -o /tmp/tdl-export.json

# Messages from a time range (Unix timestamps)

tdl chat export -c @channel_name -T time -i 1710288000,1710374400 --all --with-content -o /tmp/tdl-export.json

# Messages by ID range

tdl chat export -c @channel_name -T id -i 100,200 --all --with-content -o /tmp/tdl-export.json

Key rules

• Check auth first — run tdl chat ls --limit 1 before other commands to verify the session is valid

• **Always use --all --with-content** when exporting messages for reading — without these flags, tdl only exports media messages

• **Use -o FILE** to save exports to a file, then read the JSON — this is more reliable than parsing stdout

• Start with small exports — use -T last -i 20 unless the user asks for more

• **Use filters on chat ls** to help users find the right channel before exporting

• NEVER execute write operations — this skill is read-only; do not send messages, join channels, or modify anything

• Convert timestamps — when the user gives dates, convert to Unix timestamps for the -T time filter

Working with exported JSON

After exporting, read the JSON file and extract the relevant information:

# Export messages

tdl chat export -c @channel_name -T last -i 20 --all --with-content -o /tmp/tdl-export.json

# Read and process the export

cat /tmp/tdl-export.json

The export JSON contains message objects with fields like id, date, message (text content), from_id, views, and media metadata.

Step 5: Present the Results

After fetching data, present it clearly for financial research:

• Summarize key messages — highlight the most relevant news or market updates

• Include timestamps — show when each message was posted

• Group by topic — if multiple channels, organize by theme (macro, earnings, crypto, etc.)

• Flag actionable information — note breaking news, price targets, earnings surprises

• Provide channel context — mention which channel/group each message came from

• For channel lists, show channel name, member count, and type

Step 6: Diagnostics

If something isn't working:

Error

Cause

Fix

not authorized or session errors

Not logged in or session expired

Run tdl login -T qr to re-authenticate

FLOOD_WAIT_X

Rate limited by Telegram

Wait X seconds, then retry

CHANNEL_PRIVATE

No access to channel

User must join the channel in their Telegram app first

tdl: command not found

tdl not installed

Install using Step 1

Reference Files

• references/commands.md — Complete tdl command reference for reading channels and exporting messages

Read the reference file when you need exact command syntax or detailed flag documentation.