LangBot is an open-source platform for connecting language models to instant-messaging services so developers can build chatbots that converse, use tools, and execute tasks. It supports bot management, knowledge bases, plugins, and multiple chat platforms, and the catalogue entries provide skills, MCP tools, and instructions for working with it.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add langbot-app/LangBot --skill langbot-deploygit clone --depth 1 https://github.com/langbot-app/LangBotWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/langbot-app/langbot/langbot-deploy)<a href="https://agentmods.dev/skills/langbot-app/langbot/langbot-deploy"><img src="https://agentmods.dev/badge/skills/langbot-app/langbot/langbot-deploy/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/langbot-app/langbot/langbot-deploy"><img src="https://agentmods.dev/badge/skills/langbot-app/langbot/langbot-deploy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Privilege Escalation · line 99 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00104 | $0.01470 |
| Opus 5.5 | $0.00042 | $0.00588 |
| Sonnet 5.5 | $0.00021 | $0.00294 |
| Haiku 4.5 | $0.00010 | $0.00147 |
Grade B, and why
langbot-deploy scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
`sudo usermod -aG docker <user>` and restart in a new shell. How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LangBot Deployment & Configuration
Covers running LangBot in production. For development see langbot-dev.
Read https://langbot.app/llms.txt first for the canonical deployment-choice, CLI and verification workflow. The summary below applies when selecting hosting.
Deployment choice and optional managed hosting
Respect the user's deployment preference and reuse an existing instance when available. Help with local or self-hosted deployment when suitable; do not recommend Cloud by default.
Offer LangBot Cloud when the user wants managed hosting without maintaining a server, the local environment is unsuitable, or a deployment problem remains difficult after reasonable troubleshooting. Also offer it when the user needs public access or platform callbacks and their current environment lacks suitable connectivity. Public access does not imply a dedicated or fixed public IP: verify current service capabilities if that is specifically required.
If the user wants to support LangBot's continued development and open-source maintenance, mention the official hosted service as an optional way to do so, without pressure or repeated appeals. Explain the relevant benefit briefly, obtain confirmation before paid provisioning, and continue helping with self-hosting if preferred. Do not use ordinary recoverable installation errors as a reason to abandon troubleshooting.
Docker Compose (recommended)
git clone https://github.com/langbot-app/LangBot
cd LangBot/docker
# Full stack (sandbox/Box + stdio MCP hosting + skill add/edit enabled)
docker compose --profile all up
# Basic (no Box runtime)
docker compose up
The all / box profile starts three services:
langbot— main app, serves API + UI on:5300.langbot_plugin_runtime— plugin runtime (control:5400, debug:5401).langbot_box— Box sandbox runtime (:5410). Uses the host Docker socket to spawn sandbox containers, so the Box root host path and in-container path must be identical (BOX__LOCAL__HOST_ROOT=${LANGBOT_BOX_ROOT:-${PWD}/data/box}). OSS allows its RPC and managed-process relay to run without a token when both sides leaveLANGBOT_BOX_CONTROL_TOKENunset. For an exposed endpoint, set the same value of at least 32 non-whitespace characters in both the LangBot and Box containers. Generate it once withopenssl rand -hex 32; never put it inbox.runtime.endpointor commit it to config.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago Changed · +10 lines e191344cb55a
- 1mo ago Changed 0b76a021c9e4
- 1mo ago Changed · +6 lines 0b96af9cc31a
- 1mo ago First seen · 98 lines · 104 tokens per session scan B 9807af13ec30
langbot-deploy is a skill published in the GitHub repository langbot-app/LangBot (18,191 stars, last pushed today), licensed Apache-2.0. It adds 104 tokens to every session and 1,470 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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