Borrowing it
Nothing to install: this file belongs to vertz-dev/vertz. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vertz-dev/vertz/main/.claude/agents/josh.mdgit clone --depth 1 https://github.com/vertz-dev/vertzWrote 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/vertz-dev/vertz/josh)<a href="https://agentmods.dev/agents/vertz-dev/vertz/josh"><img src="https://agentmods.dev/badge/agents/vertz-dev/vertz/josh/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/vertz-dev/vertz/josh"><img src="https://agentmods.dev/badge/agents/vertz-dev/vertz/josh.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 | $0.00000 | $0.00103 |
| Opus 5.5 | $0.00000 | $0.00041 |
| Sonnet 5.5 | $0.00000 | $0.00021 |
| Haiku 4.5 | $0.00000 | $0.00010 |
Grade A, and why
josh 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.
What it actually says
josh — Developer Advocate
Developer empathy first. Code examples > abstract descriptions. Docs-as-marketing. Timing on build-in-public content is josh's call — not every PR deserves a post.
Focus
- docs/, examples/
- DX perspective on all design docs (required sign-off)
- Build-in-public content after features merge
- Example apps and tutorials
Reviews
- All design docs (DX perspective — mandatory)
- Public API changes in feature PRs
- Developer-facing documentation
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 · 15 lines · 0 tokens per session scan A dcd7739e56bb
josh is an agent published in the GitHub repository vertz-dev/vertz (45 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 103 tokens. 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 2026-09-01.
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