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 Gen-Verse/PAST-Bench --skill a0-create-plugingit clone --depth 1 https://github.com/Gen-Verse/PAST-BenchWrote 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/gen-verse/past-bench/a0-create-plugin)<a href="https://agentmods.dev/skills/gen-verse/past-bench/a0-create-plugin"><img src="https://agentmods.dev/badge/skills/gen-verse/past-bench/a0-create-plugin/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/gen-verse/past-bench/a0-create-plugin"><img src="https://agentmods.dev/badge/skills/gen-verse/past-bench/a0-create-plugin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, 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 Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 369 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00054 | $0.03577 |
| Opus 5.5 | $0.00022 | $0.01431 |
| Sonnet 5.5 | $0.00011 | $0.00715 |
| Haiku 4.5 | $0.00005 | $0.00358 |
Grade A, and why
a0-create-plugin scanned grade A 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 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
result = subprocess.run( How it starts
The opening of the file, as written. The whole thing — 378 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Zero Plugin Development
[!IMPORTANT] Always create new plugins in
/a0/usr/plugins/<plugin_name>/. The/a0/plugins/directory is reserved for core system plugins.
Related skills: /a0/skills/a0-review-plugin/SKILL.md | /a0/skills/a0-contribute-plugin/SKILL.md | /a0/skills/a0-manage-plugin/SKILL.md
Primary references:
- /a0/AGENTS.md (Full-stack architecture & AgentContext)
- /a0/docs/agents/AGENTS.components.md (Component system deep dive)
- /a0/docs/agents/AGENTS.modals.md (Modal system & CSS conventions)
- /a0/docs/agents/AGENTS.plugins.md (Extension points, plugin.yaml, settings system, Plugin Index)
- /a0/docs/developer/plugins.md (Developer lifecycle and publishing)
Step 0: Ask First — Local or Community Plugin?
Before starting, ask the user one question:
"Should this plugin be local only (stays in your Agent Zero installation) or a community plugin (published to the Plugin Index so others can install it)?"
- Local plugin: Create it in
/a0/usr/plugins/<plugin_name>/. No repository needed. Skip to the manifest section below. - Community plugin: The plugin must live in its own GitHub repository (runtime manifest at the repo root), and then a separate index submission PR is made to https://github.com/agent0ai/a0-plugins. Guide the user through both steps.
Plugin Manifest (plugin.yaml)
Every plugin must have a plugin.yaml or it will not be discovered.
name: my_plugin # required for community plugins; must match dir name (^[a-z0-9_]+$)
title: My Plugin
description: What this plugin does.
version: 1.0.0
settings_sections:
- agent
per_project_config: false
per_agent_config: false
name: lowercase, numbers, underscores only (^[a-z0-9_]+$). Required by CI when submitting to the Plugin Index - must exactly match the index folder name.
settings_sections controls which Settings tabs show a subsection for this plugin. Valid values: agent, external, mcp, developer, backup. Use [] for no subsection.
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 · 378 lines · 54 tokens per session scan A 27ed9357b771
a0-create-plugin is a skill published in the GitHub repository Gen-Verse/PAST-Bench (35 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 54 tokens to every session and 3,577 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
a0-create-plugin
Build, improve, review or publish Agent Zero plugins; local or community, with focused references.
lemmalog
Externalize working memory and logical state into the lemmalog Datalog engine (MCP). Use for ANY multi-step task where state should outlive one context window or span agents: long investigations, debugging sessions, audits, multi-agent searches, systematic explorations, planning with many interdependent constraints…
nornweave-api
Give AI agents their own email inboxes using the NornWeave API. Use when building email agents, sending/receiving emails programmatically, managing inboxes, retrieving threads, searching messages, or integrating with email providers (Mailgun, SES, SendGrid, Resend). NornWeave provides LLM-ready markdown parsing and…
commit
Atomic git commit with conventional message. Use when the user says "commit", "save my changes", "commit this", or wants to create a git commit. Stages specific files, writes a conventional commit message with body explaining non-obvious decisions. Never uses git add -A.
python-run
Run and debug Python scripts in the project. Use when the user says "run python", "execute this script", "debug this py file", or wants to run/modify a .py file. Handles dependency checks, linting, execution, and error analysis.
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes — find the root cause first instead of guessing at symptom patches.