/tg-check — both Telegram rails on THIS machine

The operator's order (2026-06-27): "every computer checks whether BOTH of its Telegram rails work — MCP and telethon." A local self-test: this computer checks its own two Telegram rails. Not to be confused with the hub-only connector-health-daily (centralized). The root canon = the house rule reglament-shina-telegram-bez-mcp-i-svoya-sessiya-na-mashinu.

Why two steps (this matters, don't shortcut it)

• The telethon rail is checked DETERMINISTICALLY and SAFELY (a shared lock _refresh_work_acct_a.lock → no AUTH_KEY_DUPLICATED).
• MCP cannot honestly be checked by a script — it is a harness stdio server, reachable only by the LLM inside a session. The script gives the best deterministic signal (is the process alive? a fresh fatal in the log?), while the REAL MCP verdict comes from THIS skill — probing the tool inside the session. Memory mcp-health-check: NEVER spin up a second Telethon client as a health check (AUTH_KEY_DUPLICATED).

Step 1 — the deterministic detector (0 tokens)

PYTHONIOENCODING=utf-8 python "$USERPROFILE/.claude/scripts/tg_channels_check.py"

Prints the per-machine matrix: MCP (by process + the tail of mcp_errors.log — a fresh AuthKeyDuplicated = the RED root cause; TypeNotFound = an outdated telethon) and the telethon rail (GREEN/RED via tg_bus_read.py --check). Exit 1 = something is RED. Flags: --json, --notify (pings the bus on RED).

Step 2 — the REAL in-session MCP test (this decides the MCP verdict)

• Are the Telegram MCP tools present in this session at all? If mcp__telegram__* are NOT loaded (absent from the tool list / ToolSearch cannot find them) → MCP is RED: not loaded into the session.
• If they are — call ONE cheap read tool: mcp__telegram__list_accounts (or get_me, expecting the work account). Answered without an error → MCP is GREEN. An error (AuthKeyDuplicated / timeout) → RED + the reason from the error.
• ⚠️ Exactly ONE cheap call. Don't call get_history/search_dialogs (heavy → they can take the MCP down).

Step 3 — merge and report (a 🟢/🔴 matrix)

Merge the detector (Step 1) with the live MCP probe (Step 2) into a single per-machine verdict:

=== Telegram: both rails @ <machine> ===
🟢/🔴  MCP (chigwell)  : <the Step 2 verdict — it wins> — <reason>
🟢/🔴  telethon rail    : <the Step 1 verdict>

• The Step 2 verdict (live) BEATS the Step 1 detector (indirect) — the log can lag behind.
• On RED — hand over the runbook (below). Both 🟢 — a single line: "both rails alive".

The RED runbook (from the house rules)

• MCP RED + AuthKeyDuplicated → ROOT CAUSE: one TG session used on 2+ machines. The band-aid is to restart Claude Code (the harness brings MCP back up; it will hit the same root cause again). The durable fix is that every machine has ITS OWN TG session (Rule B in the house rules) — coordinated by the hub, the operator logs in locally.
• MCP RED + TypeNotFound → an outdated telethon in <TELEGRAM_MCP_DIR>\.venv → update it.
• MCP "not loaded into the session" → restart Claude Code (or open a session that loads MCP).
• The telethon rail RED → a missing/broken REFRESH_* in $IMPORTS_ROOT/dialogs/.env on this machine, or the group is unreachable → check the .env / access to the group <YOUR_CHAT_ID>.
• The bus still works over the rail (if it is 🟢): tg_bus_read.py / tg_bus_send.py — no MCP needed.

Turn it into a routine? (offer it, don't impose — the "recurring → routine" rule)

If the operator wants EVERY computer to watch both rails itself — set up a nightly task (window 23:00-06:00 local) running python tg_channels_check.py --notify on each machine: silent when green, a bus/Saved ping on RED. That is a local watchdog (deterministic, no LLM); the hub watchdog connector-health-daily stays centralized. The operator decides.

Boundaries

• Read/diagnose only. Reconnecting MCP = restarting Claude Code (a stdio MCP cannot be raised from inside a session).
• Splitting TG sessions across machines is a multi-machine change (Tier-2) → coordinate with the hub.
• Canon: the house rule reglament-shina-telegram-bez-mcp-i-svoya-sessiya-na-mashinu, memory machine-bus-telegram-rail, connector-health-watchdog, mcp-health-check.

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Like this skill? It is one of 100 in second-brain-starter-kit: the second brain we built for ourselves and run every day at Palo Alto AI Research Lab. Install the whole set with npx skills add tonydzi/second-brain-starter-kit. Everything is open source and free, so take what you need.

Flagships worth a look on their own: secondop-panel (a second opinion from a panel of external models), claude-memory-tidy (stop your agent's memory from rotting), telegram-mcp-kit (your own Telegram over MCP in about 15 minutes).

Author: Anton Dziatkovskii, Palo Alto AI Research Lab. Telegram @tonydzi - WhatsApp +1 341 222 9178 - X @Tony_Stef_

Engineers: want to test-drive this setup? Message me. I hand out free starter seeds to engineers who test and report back, and custom skill requests are welcome.