David Ondrej's Agent Skills is a repository of reusable instruction packages for AI coding, research, and workflow agents. Each skill describes a focused process for tasks such as code improvement, research, documentation, transcript work, and agent coordination. The catalogue entries are the repository's own skills and related agent configuration.
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 agentmods add skills/davidondrej/skills/bb-pluginsnpx skills add davidondrej/skills --skill bb-pluginsgit clone --depth 1 https://github.com/davidondrej/skillsWrote 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/davidondrej/skills/bb-plugins)<a href="https://agentmods.dev/skills/davidondrej/skills/bb-plugins"><img src="https://agentmods.dev/badge/skills/davidondrej/skills/bb-plugins.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00062 | $0.00831 |
| Opus 5 | $0.00031 | $0.00415 |
| Sonnet 5 | $0.00012 | $0.00166 |
| Haiku 4.5 | $0.00006 | $0.00083 |
Grade A, and why
bb-plugins 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 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.
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 — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bb plugins
bb plugins are TypeScript packages that run inside bb. They are how bb extends itself.
Many first-party features are plugins: GitHub, Docs, Memory, Tasks, Connect, Automations, Secrets, Keep Awake, and the coding-agent providers.
Trust
Plugins are full-trust. Server code runs in-process. App UI is same-origin page code, not a sandbox. Host workers run as Node on enrolled machines.
Review source before installing third-party plugins. Keep credentials in secret: true settings.
This skill vs others
- Use this skill to create, install, or change a plugin.
- Use
bb-clito operate bb (threads, projects, environments). - For exact API signatures, read the
bb-plugin-authoringskill if it is available, then runbb guide plugins. In the plugin directory, runbb plugin typesbefore trusting local SDK types. Do not guess from minifieddist/files.
Scaffold
bb plugin new hello # add --app for a React UI
cd bb-plugin-hello
bb plugin install . --yes
bb plugin dev # rebuild + reload on save
The manifest is the bb object in package.json. Required: bb.name, bb.description, bb.branding.icon, bb.server. Optional: bb.app, bb.host, bb.skills, bb.themes.
Plugin id is the last package-name segment with a bb-plugin- prefix stripped. bb-plugin-hello and @acme/bb-plugin-hello both become hello.
Put runtime imports in dependencies. Leave types and tooling in devDependencies. Git installs run npm install --omit=dev.
What a plugin can add
A default-export factory in server.ts receives BbPluginApi and registers surfaces:
- settings, kv + SQLite storage, HTTP, RPC, realtime
- background services and cron
- one top-level
bb <name> …command - agent tools,
skills/folders, extra instructions - mention providers
- optional host workers and experimental agent providers
app.tsx default-exports definePluginApp and can add pages, thread-panel actions, composer controls, file openers, and a replacement sidebar.
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 First seen · 78 lines · 62 tokens per session scan A 70eff09b88ff
bb-plugins is a skill published in the GitHub repository davidondrej/skills (3,828 stars, last pushed 3d ago), licensed MIT. It adds 62 tokens to every session and 831 once invoked, about $0.0003 per session on Opus 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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