Telegram Channel Reader

Read posts and comments from Telegram channels via MTProto (Pyrogram or Telethon). Fetch recent messages and discussion replies from public or private channels by time window.

Sergey Mikhaylov@bzsega

Install

openclaw skills install @bzsega/sergei-mikhailov-tg-channel-reader

tg-channel-reader

Read posts and comments from Telegram channels using MTProto (Pyrogram or Telethon). Works with any public channel and private channels the user is subscribed to. Supports fetching discussion replies (comments) for individual posts.

Security notice: This skill requires TG_API_ID and TG_API_HASH from my.telegram.org. The session file grants full Telegram account access — store it securely and never share it.

Exec Approvals

Just installed via clawhub install? Complete Setup & Installation (below) first — the skill needs pip install, credentials, and a session file before exec approvals matter.

OpenClaw blocks unknown CLI commands by default. The user must approve tg-reader commands before they can run. If the command hangs or the user says nothing is happening — exec approval is likely pending.

Quick setup (recommended)

Run from the skill directory — checks prerequisites, installs pip packages if needed, and prints the approval commands to run:

bash

cd ~/.openclaw/workspace/skills/sergei-mikhailov-tg-channel-reader
bash setup-tg-reader.sh

Manual CLI approval

bash

openclaw approvals allowlist add --gateway "$(which tg-reader)"
openclaw approvals allowlist add --gateway "$(which tg-reader-check)"
openclaw approvals allowlist add --gateway "$(which tg-reader-telethon)"

Alternative: approve on first use

Control UI — open http://localhost:18789/, find the pending approval for tg-reader, click "Always allow". Docs
Messenger (Telegram, Slack, Discord) — the bot sends an approval request with an <id>. Reply: /approve <id> allow-always. Other options: allow-once, deny.

The approval prompt appears in the Control UI or as a bot message — not in the agent's conversation. This is a common source of confusion.

When to Use

User asks to "check", "read", or "monitor" a Telegram channel
Wants a digest or summary of recent posts
Asks "what's new in @channel" or "summarize last 24h from @channel"
Wants to track or compare multiple channels
Wants channel info (title, description, subscribers) — use tg-reader info

Quick Start

bash

# 1. Run pre-flight diagnostic (fast, no Telegram connection)
tg-reader-check

# 2. Get channel info
tg-reader info @channel_name

# 3. Fetch recent posts
tg-reader fetch @channel_name --since 24h

tg-reader: command not found? Run bash setup-tg-reader.sh from the skill directory (it will install the package), or manually: cd ~/.openclaw/workspace/skills/sergei-mikhailov-tg-channel-reader && pip install .

Commands

`tg-reader-check` — Pre-flight Diagnostic

Always run before fetching. Fast offline check — no Telegram connection needed.

bash

tg-reader-check
tg-reader-check --config-file /path/to/config.json
tg-reader-check --session-file /path/to/session

Returns JSON with "status": "ok" or "status": "error" plus a problems array.

Verifies:

Credentials available (env vars or ~/.tg-reader.json)
Session file exists on disk (with size, modification date)
At least one MTProto backend installed (Pyrogram or Telethon)
Detects stale sessions (config points to older file while a newer one exists)

`tg-reader info` — Channel Info

bash

tg-reader info @channel_name

Returns title, description, subscriber count, and link.

`tg-reader fetch` — Read Posts

bash

# Last 24 hours (default)
tg-reader fetch @channel_name --since 24h

# Last 7 days, up to 200 posts
tg-reader fetch @channel_name --since 7d --limit 200

# Multiple channels (fetched sequentially with 10s delay between each)
tg-reader fetch @channel1 @channel2 @channel3 --since 24h

# Custom delay between channels (seconds)
tg-reader fetch @channel1 @channel2 @channel3 --since 24h --delay 5

# Fetch posts with comments (single channel only, limit auto-drops to 30)
tg-reader fetch @channel_name --since 7d --comments

# More comments per post, custom delay between posts
tg-reader fetch @channel_name --since 24h --comments --comment-limit 20 --comment-delay 5

# Skip posts without text (media-only, no caption)
tg-reader fetch @channel_name --since 24h --text-only

# Human-readable output
tg-reader fetch @channel_name --since 24h --format text

# Write output to file instead of stdout (saves tokens)
tg-reader fetch @channel_name --since 24h --output
tg-reader fetch @channel_name --since 24h --comments --output comments.json

# Use Telethon instead of Pyrogram (one-time)
tg-reader fetch @channel_name --since 24h --telethon

# Read unread mode — only fetch new (unread) posts, no --since needed
# Requires "read_unread": true in ~/.tg-reader.json
tg-reader fetch @channel_name

# Override read_unread mode (fetch everything, don't update state)
tg-reader fetch @channel_name --since 7d --all

# Custom state file location
tg-reader fetch @channel_name --since 24h --state-file /path/to/state.json

`tg-reader auth` — First-time Authentication

bash

tg-reader auth

Creates a session file. Only needed once.

Read Unread Mode

Only return new (unread) posts — the skill remembers what you've already seen. Useful for daily digests and monitoring workflows.

Setup

Option A — config file (~/.tg-reader.json):

json

{
  "api_id": 12345,
  "api_hash": "...",
  "read_unread": true
}

Option B — env var (works with ~/.openclaw/openclaw.json):

bash

export TG_READ_UNREAD=true

Env vars take priority over the config file. This lets you enable read_unread via openclaw.json Docker env alongside TG_API_ID/TG_API_HASH.

State is stored in ~/.tg-reader-state.json (configurable via "state_file" in config, TG_STATE_FILE env var, or --state-file flag).

Behavior

--since is not needed when read_unread is enabled — the skill automatically returns all unread posts regardless of time
First run (no prior state for channel): --since applies as usual (default 24h); state file created
Subsequent runs: only posts newer than the last read are returned; --since is ignored
--all flag: bypasses read_unread mode — fetches everything by --since without updating state (preserves your position)
New channel: behaves like a first run (no prior state)
No new posts: state unchanged, count: 0 returned

Examples

bash

# With read_unread enabled — just fetch, no --since needed
tg-reader fetch @channel_name

# First run for a new channel — --since determines initial window
tg-reader fetch @new_channel --since 7d

# Override: fetch everything, don't update tracking state
tg-reader fetch @channel_name --since 7d --all

Output

When read_unread mode is active, the JSON output includes a read_unread field:

json

{
  "channel": "@channel_name",
  "read_unread": {"enabled": true},
  "count": 5,
  "messages": [...]
}

With --all: "read_unread": {"enabled": true, "overridden": true}

Limitations

Tracking is post-level only — new comments on already-read posts are not caught
If a channel changes its username, tracking resets (state is keyed by username)
Concurrent runs for the same channel are safe but last writer wins

Diagnostic

tg-reader-check reports tracking status:

json

{
  "tracking": {
    "read_unread": true,
    "state_file": "~/.tg-reader-state.json",
    "state_file_exists": true,
    "tracked_channels": 3
  }
}

Output Format

`info`

json

{
  "id": -1001234567890,
  "title": "Channel Name",
  "username": "channel_name",
  "description": "About this channel...",
  "members_count": 42000,
  "link": "https://t.me/channel_name"
}

`fetch`

json

{
  "channel": "@channel_name",
  "fetched_at": "2026-02-22T10:00:00Z",
  "since": "2026-02-21T10:00:00Z",
  "count": 12,
  "messages": [
    {
      "id": 1234,
      "date": "2026-02-22T09:30:00Z",
      "text": "Post content...",
      "views": 5200,
      "forwards": 34,
      "link": "https://t.me/channel_name/1234",
      "has_media": true,
      "media_type": "MessageMediaType.PHOTO"
    }
  ]
}

Optional web_page field — present only when a post carries a Telegram link-preview card (e.g. Instant View articles, link shares). Photos / videos / documents are reported via has_media + media_type, not here.

json

{
  "id": 9876,
  "text": "Card title\n\nCard description...\n\nhttps://example.com/article",
  "has_media": false,
  "web_page": {
    "url": "https://example.com/article",
    "display_url": "example.com/article",
    "title": "Card title",
    "description": "Card description...",
    "site_name": "Example Site"
  }
}

When the message has no text of its own (a common pattern for channels publishing via Instant View), the text field is synthesized from title + description + url so the post still surfaces. The web_page object carries the original structured data for agents that want them separately.

`fetch` with `--comments`

json

{
  "channel": "@channel_name",
  "fetched_at": "2026-02-28T10:00:00Z",
  "since": "2026-02-27T10:00:00Z",
  "count": 5,
  "comments_enabled": true,
  "comments_available": true,
  "messages": [
    {
      "id": 1234,
      "text": "Post content...",
      "has_media": false,
      "comment_count": 2,
      "comments": [
        {
          "id": 5678,
          "date": "2026-02-28T09:35:00Z",
          "text": "Great post!",
          "from_user": "username123"
        }
      ]
    }
  ]
}

Notes:

comments_available: false — channel has no linked discussion group (no comments possible)
comments_error on a message — rate limit hit for that post's comments
from_user may be null for anonymous comments
Images/videos in comments are not analyzed — only text is captured
Default post limit drops to 30 when --comments is active (override with --limit)

After Fetching

Parse the JSON output
Posts with images/videos have has_media: true and a media_type field. Their text is in the text field (from the caption). Do not skip posts just because they have media — they often contain important text.
Images and videos are not analyzed (no OCR/vision) — only the text/caption is returned.
Posts with a Telegram link-preview card carry a web_page object (URL, title, description, site name). For Instant-View articles the text field is synthesized from the card, so these posts surface in summaries just like text posts — do not skip them even when has_media: false.
Summarize key themes, top posts by views, notable links
If comments_enabled: true, analyze comment sentiment and key themes alongside the main posts
Save summary to memory/YYYY-MM-DD.md if user wants to track over time

Saving to File (Token Economy)

Use --output when the result is large (especially with --comments) and you don't need to analyze it immediately. The full data goes to a file, and stdout returns only a short confirmation — this saves tokens.

Periodic updates pattern: set up a cron task that runs tg-reader fetch @channel --comments --output comments.json on schedule. The file gets updated regularly. When the user asks to analyze comments — read the file instead of re-fetching. This avoids consuming tokens on every fetch.

When --output is used without a filename, the default is tg-output.json. Stdout confirmation:

json

{"status": "ok", "output_file": "/absolute/path/to/tg-output.json", "count": 12}

Saving Channel List

Store tracked channels in TOOLS.md:

markdown

## Telegram Channels
- @channel1 — why tracked
- @channel2 — why tracked

Error Handling

Errors include an error_type and action field to help agents decide what to do automatically.

Channel Errors

`error_type`	Meaning	`action`
`access_denied`	Channel is private, you were kicked, or access is restricted	`remove_from_list_or_rejoin` — ask user if they still have access; if not, remove the channel
`banned`	You are banned from this channel	`remove_from_list` — remove the channel, tell the user
`not_found`	Channel doesn't exist or username is wrong	`check_username` — verify the @username with the user
`invite_expired`	Invite link is expired or invalid	`request_new_invite` — ask user for a new invite link
`flood_wait`	Telegram rate limit	`wait_Ns` — waits ≤ 60 s are retried automatically; longer waits return this error
`comments_multi_channel`	`--comments` used with multiple channels	`remove_extra_channels_or_drop_comments` — use one channel at a time

System Errors

Error	Action
`Session file not found`	Run `tg-reader-check` — use the `suggestion` from output
`Missing credentials`	Guide user through Setup (Step 1-2 below)
`tg-reader: command not found`	Run `bash setup-tg-reader.sh` from the skill directory, or manually: `pip install .` Fallback: `python3 -m tg_reader_unified`
`AUTH_KEY_UNREGISTERED`	Session expired — delete and re-auth (see below)

Session Expired

bash

rm -f ~/.tg-reader-session.session
tg-reader auth

Auth Code Not Arriving

Use the verbose debug script for full MTProto-level logs:

bash

python3 debug_auth.py

Warning: debug_auth.py deletes existing session files before re-authenticating. It will ask for confirmation first.

Library Selection

Two MTProto backends are supported:

Backend	Command	Notes
Pyrofork (default)	`tg-reader` or `tg-reader-pyrogram`	Drop-in fork of Pyrogram with current Telegram TL schema. Installs as the `pyrogram` package. The CLI command keeps the `pyrogram` name for backwards compatibility.
Telethon	`tg-reader-telethon`	Alternative backend with separate implementation

Why pyrofork instead of pyrogram: the upstream pyrogram package on PyPI (2.0.106, Aug 2023) does not parse Telegram Message TL constructor IDs introduced in May 2026, so recent posts come through with empty message/media/entities. pyrofork is a community fork that ships the current schema. Sessions are format-compatible — switching does not require re-authentication.

Switch persistently: export TG_USE_TELETHON=true Switch one-time: tg-reader fetch @channel --since 24h --telethon

Setup & Installation

Full details in README.md.

Step 1 — Get API Credentials

Go to https://my.telegram.org → API Development Tools → create an app → copy api_id and api_hash.

Step 2 — Save Credentials

Recommended (works in agents and servers):

bash

cat > ~/.tg-reader.json << 'EOF'
{
  "api_id": YOUR_ID,
  "api_hash": "YOUR_HASH"
}
EOF
chmod 600 ~/.tg-reader.json

Alternative (interactive shell only):

bash

export TG_API_ID=YOUR_ID
export TG_API_HASH="YOUR_HASH"

Set these in your current shell session. Avoid writing TG_API_HASH to shell profiles (~/.bashrc) — use ~/.tg-reader.json instead for persistent storage.

Note: Agents and servers don't load shell profiles. Use ~/.tg-reader.json (the recommended method above) for non-interactive environments.

Step 3 — Install & Configure

bash

npx clawhub@latest install sergei-mikhailov-tg-channel-reader
cd ~/.openclaw/workspace/skills/sergei-mikhailov-tg-channel-reader
bash setup-tg-reader.sh

The setup script: installs Python packages (pip install .), checks credentials and session, runs tg-reader-check, and prints the exec approval commands for you to run manually.

On Linux with managed Python (Ubuntu/Debian), use a venv before running the setup script:

bash

python3 -m venv ~/.venv/tg-reader
echo 'export PATH="$HOME/.venv/tg-reader/bin:$PATH"' >> ~/.bashrc && source ~/.bashrc

Manual install (without setup script)

bash

cd ~/.openclaw/workspace/skills/sergei-mikhailov-tg-channel-reader
# pyrofork replaces pyrogram; uninstall pyrogram first if it was already installed
pip uninstall pyrogram -y 2>/dev/null
pip install pyrofork tgcrypto telethon && pip install .
openclaw approvals allowlist add --gateway "$(which tg-reader)"
openclaw approvals allowlist add --gateway "$(which tg-reader-check)"

Step 4 — Authenticate

bash

tg-reader auth

Pyrogram will ask to confirm the phone number — answer y. The code arrives in the Telegram app (not SMS).

Step 5 — Verify

bash

tg-reader-check

Should return "status": "ok". If not — fix the reported issues and re-run bash setup-tg-reader.sh.

Scheduled Tasks & Cron

This skill needs network access (MTProto connection to Telegram servers) and a session file. How you configure OpenClaw cron depends on the session target.

Important: When setting up a scheduled task that uses tg-reader, tell the user which approach you're using and what it means — so they can make an informed choice.

Option A — `sessionTarget: "main"` (recommended)

The cron task sends a reminder to the main agent session. The agent then runs tg-reader in the main environment where the skill, credentials, and session file are already available.

Pros: No extra configuration — everything works out of the box. Cons: Not fully autonomous — the task sends a system event, the agent picks it up and executes. Requires payload.kind: "systemEvent" (OpenClaw cron API limitation for main target).

How to set up:

Create a cron task with sessionTarget: "main" and payload.kind: "systemEvent"
In the task description, include the exact tg-reader command to run
The agent receives the reminder and executes the command in its main session

Option B — `sessionTarget: "isolated"` (autonomous, complex setup)

The cron task runs in a Docker container — fully autonomous, no agent interaction needed. However, the container starts empty: no skill, no credentials, no session file.

Pros: Fully autonomous — runs on schedule without agent involvement. Cons: Requires Docker setup; session file must be mounted into the container (may not work reliably — session files are tied to the machine and Telegram may invalidate them in a new environment).

Required configuration in ~/.openclaw/openclaw.json:

json

{
  "agents": {
    "defaults": {
      "sandbox": {
        "docker": {
          "setupCommand": "clawhub install sergei-mikhailov-tg-channel-reader && cd ~/.openclaw/workspace/skills/sergei-mikhailov-tg-channel-reader && pip uninstall pyrogram -y 2>/dev/null; pip install pyrofork tgcrypto telethon && pip install .",
          "env": {
            "TG_API_ID": "YOUR_ID",
            "TG_API_HASH": "YOUR_HASH",
            "TG_READ_UNREAD": "true"
          }
        }
      }
    }
  }
}

Session file caveat: The Telegram session file (~/.tg-reader-session.session) must also be available inside the container. This may require Docker volume mounting and might not work reliably — Telegram can invalidate sessions when they appear from a different environment. If you encounter AUTH_KEY_UNREGISTERED errors in isolated mode, switch to Option A.

Explicit paths (both options)

When ~/ is not available or points to a different location, use explicit paths:

bash

tg-reader-check \
  --config-file /home/user/.tg-reader.json \
  --session-file /home/user/.tg-reader-session

tg-reader fetch @channel --since 6h \
  --config-file /home/user/.tg-reader.json \
  --session-file /home/user/.tg-reader-session

Both flags work with all subcommands and both backends.

Security

Session file (~/.tg-reader-session.session) grants full account access — keep it safe
Never share or commit TG_API_HASH or session files
TG_API_HASH is a secret — store in env vars or config file, never in git

Telegram Channel Reader

Install

tg-channel-reader

Exec Approvals

Quick setup (recommended)

Manual CLI approval

Alternative: approve on first use

When to Use

Quick Start

Commands

tg-reader-check — Pre-flight Diagnostic

tg-reader info — Channel Info

tg-reader fetch — Read Posts

tg-reader auth — First-time Authentication

Read Unread Mode

Setup

Behavior

Examples

Output

Limitations

Diagnostic

Output Format

info

fetch

fetch with --comments

After Fetching

Saving to File (Token Economy)

Saving Channel List

Error Handling

Channel Errors

System Errors

Session Expired

Auth Code Not Arriving

Library Selection

Setup & Installation

Step 1 — Get API Credentials

Step 2 — Save Credentials

Step 3 — Install & Configure

Step 4 — Authenticate

Step 5 — Verify

Scheduled Tasks & Cron

Option A — sessionTarget: "main" (recommended)

Option B — sessionTarget: "isolated" (autonomous, complex setup)

Explicit paths (both options)

Security

Related skills

`tg-reader-check` — Pre-flight Diagnostic

`tg-reader info` — Channel Info

`tg-reader fetch` — Read Posts

`tg-reader auth` — First-time Authentication

`info`

`fetch`

`fetch` with `--comments`

Option A — `sessionTarget: "main"` (recommended)

Option B — `sessionTarget: "isolated"` (autonomous, complex setup)