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bub

Skill · GitHub · ★ 1.7k · graded 2026-10-22Source linked

Bub it. Build it. A tiny agent runtime, composable with plugins.

No outside reports on file

Bub is relatively small and has low adoption, so security testing is limited; only run it with trusted plugins and monitor what data it accesses.

Based on public adoption and transparency signals as of Oct 22, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

  • Local filesNo local folder access notedLOW
  • Command executionNo shell command runner notedLOW
  • Network reachLocal or standard API callsLOW
  • CredentialsNo API token requiredLOW
  • Package sourceGitHub (bubbuild/bub)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

No npm or PyPI package is listed. Install from source: github.com/bubbuild/bub ↗

All setup options ↓

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About Bub

Bub is a small runtime for AI agents that you can extend with plugins. It appears designed to help developers build and run agent applications by combining basic components in different ways.

Who it’s for

Developers who want to create AI agents with a lightweight, modular approach. It may appeal to those building custom agent systems who prefer simple building blocks over large frameworks.

Alternatives

  • LangChain: Larger framework for building language model applications with agent support. - AutoGPT: Agent framework that runs autonomous AI tasks (more complex than Bub). - OpenAI Assistants API: Hosted agent system with built-in safety features. - CrewAI: Multi-agent orchestration framework with role-based task assignment.

Setup

Check these steps against the project’s own instructions before running anything.

Follow the project's README for installation and setup instructions.

Why this grade

CC — Moderate risk signals

Signal-based grade (3/7 points): well starred on GitHub, public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

36/100
GitHub stars
1.7k
Listing last refreshed
2026-10-28

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Security reports

No reports found for this package in our research (last checked 2026-10-29).

Check a specific version →

Risks to watch for

  • Plugin code execution: Plugins can run arbitrary code with the same permissions as the Bub runtime, so untrusted plugins could access files and data. - Web page tricks: An agent using Bub could be misled by fake data or prompt injection in web content it reads. - Data leaks through plugins: Plugins might send sensitive information to external services without clear logging. - No built-in sandboxing: The tool does not appear to isolate plugins from each other or from the host system. - Dependency risks: Like any npm package, dependencies could be compromised or have security flaws.

How to lower the risk

Least-privilege permissions

  • Run Bub with a dedicated user account that has minimal file access.
  • Only load plugins from sources you trust and have reviewed.

Network isolation

  • Restrict network access if the agent does not need to reach external services.
  • Monitor outbound connections to detect unexpected data exfiltration.

Monitoring

  • Log all plugin activity and API calls for review.
  • Watch for unusual file access or network requests that plugins make.

Red flags to watch for

  • Plugins requesting broad file system or environment variable access.
  • Unexpected outbound connections to unknown domains.
  • Error messages or behavior that suggests the agent was confused or manipulated.

Questions

How do I install Bub?

Bub does not publish a standalone npm or PyPI package. Clone or follow the setup instructions in its source repository at github.com/bubbuild/bub.

Are there security reports about Bub?

No reports found for this package in our research (last checked 2026-10-29). Bub currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Key risk areas to watch include plugin code execution.

Is Bub actively maintained?

Bub has 1.7k GitHub stars. Our directory data was last refreshed on 2026-10-28. Check recent commit activity, release tags, and open issues at github.com/bubbuild/bub before pinning it in production.

What are alternatives to Bub?

Notable alternatives to Bub include LangChain (Larger framework for building language model applications with agent support. - **AutoGPT**: Agent framework that runs autonomous AI tasks (more complex than Bub). - **OpenAI Assistants API**: Hosted agent system with built-in review features. - **CrewAI**: Multi-agent orchestration framework with role-based task assignment). You can also compare Bub side by side with other skills in the Related tools section on this page.

README badge and team notes

Maintain or use Bub? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade C for Bub

GitHub README Markdown:

markdown
[![AgentArmorHQ Risk Grade for Bub](https://agentarmorhq.com/api/badge/bubbuild-bub)](https://agentarmorhq.com/skills/bubbuild-bub)

HTML embed:

html
<a href="https://agentarmorhq.com/skills/bubbuild-bub"><img src="https://agentarmorhq.com/api/badge/bubbuild-bub" alt="AgentArmorHQ Risk Grade for Bub" height="20" /></a>

Terminal check:

terminal
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "bubbuild-bub"

Share with your security lead

Need sign-off to use bub? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: bub
- **Listing URL:** https://agentarmorhq.com/skills/bubbuild-bub
- **Type:** AI agent skill
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 1.7k GitHub stars

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Local or standard API calls
- **Credentials:** No API token required
- **Package source:** GitHub (bubbuild/bub)

#### Recommended Hardened Setup
- **Source Repo:** https://github.com/bubbuild/bub
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 22, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type
AI agent skill
Publisher
bubbuild
Source code
github.com/bubbuild/bub
Est. context load
~50 tokens idle · ~450 tokens when active (on-demand skill)
Popularity
1.7k GitHub stars
Last updated
2026-10-28
Last graded
2026-10-22

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