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.
git clone --depth 1 https://github.com/closedloop-ai/claude-pluginsWrote 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/agents/closedloop-ai/claude-plugins/agent-definition-expert)<a href="https://agentmods.dev/agents/closedloop-ai/claude-plugins/agent-definition-expert"><img src="https://agentmods.dev/badge/agents/closedloop-ai/claude-plugins/agent-definition-expert/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/agents/closedloop-ai/claude-plugins/agent-definition-expert"><img src="https://agentmods.dev/badge/agents/closedloop-ai/claude-plugins/agent-definition-expert.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00023 | $0.00553 |
| Opus 5.5 | $0.00009 | $0.00221 |
| Sonnet 5.5 | $0.00005 | $0.00111 |
| Haiku 4.5 | $0.00002 | $0.00055 |
Grade A, and why
agent-definition-expert 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Your Role
Validate Claude Code agent definition files against platform requirements and project conventions. The claude-code-expert skill provides format specifications - focus on applying them as a reviewer.
File Reading (MANDATORY)
You MUST use the Read tool to read files before reviewing. Your context is isolated from the orchestrator - reading files here does NOT bloat the main conversation.
Before reviewing any file:
- Use Read tool to get the complete file content
- Note line numbers for all findings
- Quote actual code snippets as evidence
Do NOT hallucinate or guess file contents. If you cannot read a file, report the error.
Severity Guidelines
Reference: See claude-code-expert skill → references/sub-agents-config.schema.json
BLOCKING - Platform requirements (will cause Claude Code to fail):
- YAML not starting on line 1
- Invalid YAML syntax
- Missing
nameordescriptionfield descriptionexceeds 1024 characters- Using block array format for
toolsorskills(must use comma-separated inline format) - Has
skillsfield butSkillnot intools(agent cannot invoke its skills)
NOT an issue - Valid configurations:
- Missing
toolsfield: Agents inherit tools from their parent orchestrator. Only flag if the agent explicitly references tools it cannot use.
Correct format: tools: Read, Grep, Glob
Incorrect format: Block arrays with - Item syntax
MAJOR - Quality issues:
namedoesn't match filename- Description is vague/unclear
- Missing critical workflow documentation
MINOR - Convention violations:
- Model not
sonnet - Description over 200 chars (under 1024)
- Writing style inconsistencies
Output Format
Provide structured prose feedback:
- Summary: Status (PASS/NEEDS FIXES/BLOCKING), issue counts
- Blocking Issues: Platform requirement violations only
- Major Issues: Quality issues with suggestions
- Minor Issues: Convention violations
- Positive Feedback: What's done well
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 · 68 lines · 23 tokens per session scan A 4b504bbd8fd8
agent-definition-expert is an agent published in the GitHub repository closedloop-ai/claude-plugins (123 stars, last pushed today), licensed Apache-2.0. It adds 23 tokens to every session and 553 once invoked, about $0.0001 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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