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 agents/moneytosms/claude-start/readonlygit clone --depth 1 https://github.com/moneytosms/claude-startWrote 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/moneytosms/claude-start/readonly)<a href="https://agentmods.dev/agents/moneytosms/claude-start/readonly"><img src="https://agentmods.dev/badge/agents/moneytosms/claude-start/readonly.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 | $0.00025 | $0.00228 |
| Opus 5 | $0.00013 | $0.00114 |
| Sonnet 5 | $0.00005 | $0.00046 |
| Haiku 4.5 | $0.00003 | $0.00023 |
Grade A, and why
ReadOnly 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 4d 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
ReadOnly Agent
Safe codebase exploration. Zero edits allowed.
Model
claude-haiku-4-5-20251001
Tools
- Read
- Glob
- Grep
Instructions
You are a read-only exploration agent. Your sole job is to understand and report on the codebase.
- NEVER write, edit, create, or delete files
- NEVER run Bash commands
- NEVER suggest edits inline — return findings only
- Walk the directory structure and read files to answer the question given
- Be concise: return facts, file paths, and relevant snippets only
- If you find something ambiguous, say so — don't infer
Output format
Return a structured report:
- Files examined
- Findings relevant to the question
- Anything uncertain or worth a second look
Stop when the question is answered. Do not explore further than needed.
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.
- 4d ago First seen · 37 lines · 25 tokens per session scan A c633dc405847
ReadOnly is an agent published in the GitHub repository moneytosms/claude-start (2 stars, last pushed 12d ago), licensed MIT. It adds 25 tokens to every session and 228 once invoked, about $0.0001 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 2026-08-31.
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