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-eba-adapter-devgit 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-eba-adapter-dev)<a href="https://agentmods.dev/skills/langbot-app/langbot/langbot-eba-adapter-dev"><img src="https://agentmods.dev/badge/skills/langbot-app/langbot/langbot-eba-adapter-dev/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-eba-adapter-dev"><img src="https://agentmods.dev/badge/skills/langbot-app/langbot/langbot-eba-adapter-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
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 →
- high Privilege Escalation · line 19 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
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 | $0.00073 | $0.03516 |
| Opus 5.5 | $0.00029 | $0.01406 |
| Sonnet 5.5 | $0.00015 | $0.00703 |
| Haiku 4.5 | $0.00007 | $0.00352 |
Grade A, and why
langbot-eba-adapter-dev scanned grade A with 0 findings 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LangBot EBA Adapter Development
Use this skill when implementing or reviewing a LangBot platform adapter under the Event-Based Agents architecture.
Controlling a running instance via MCP
Beyond writing code, you can drive a live LangBot instance over MCP — no raw
HTTP needed. Two MCP servers exist (both reuse existing API keys; see AGENTS.md):
- LangBot instance —
http://<host>:5300/mcp(auth: web-UIlbk_key or theapi.global_api_keyfromconfig.yaml). Manage bots, pipelines, models, knowledge bases, and skills. See thelangbot-mcp-opsskill. - LangBot Space marketplace —
https://space.langbot.app/mcp(auth: Personal Access Token). Search plugins / MCP servers / skills. See thelangbot-space-opsskill.
Any change to an agent-accessible HTTP API endpoint must keep the matching MCP tool and these skills in sync.
Core Rule
Do not let platform-native event or message shapes leak into LangBot's common path. Each adapter must convert incoming SDK objects into unified EBA entities before dispatch:
- Events:
langbot_plugin.api.entities.builtin.platform.events - Message chains:
langbot_plugin.api.entities.builtin.platform.message.MessageChain - Users/groups/members:
langbot_plugin.api.entities.builtin.platform.entities - Raw platform objects may remain only in
source_platform_objectfor debugging or platform-specific escape hatches.
Start Here
- Read the EBA design docs in
LangBot/docs/event-based-agents/. - Read the architecture-level acceptance checklist before writing or validating code:
LangBot/docs/event-based-agents/adapters/acceptance-checklist.md
- Read the current reference adapter before writing code. Prefer Telegram first:
LangBot/src/langbot/pkg/platform/adapters/telegram/LangBot/docs/event-based-agents/adapters/telegram.md
- Read the legacy source adapter for the target platform:
LangBot/src/langbot/pkg/platform/sources/<platform>.pyLangBot/src/langbot/pkg/platform/sources/<platform>.yaml
- Inspect SDK entity definitions in
langbot-plugin-sdk/src/langbot_plugin/api/entities/builtin/platform/. - Search before assuming APIs. Platform SDKs change often.
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.
- 1mo ago First seen · 302 lines · 73 tokens per session scan A bd83f1e8b2bc
langbot-eba-adapter-dev is a skill published in the GitHub repository langbot-app/LangBot (18,257 stars, last pushed today), licensed Apache-2.0. It adds 73 tokens to every session and 3,516 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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