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 02loveslollipop/OpenCROW --skill opencrow-utility-toolboxgit clone --depth 1 https://github.com/02loveslollipop/OpenCROWWrote 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/02loveslollipop/opencrow/opencrow-utility-toolbox)<a href="https://agentmods.dev/skills/02loveslollipop/opencrow/opencrow-utility-toolbox"><img src="https://agentmods.dev/badge/skills/02loveslollipop/opencrow/opencrow-utility-toolbox/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/02loveslollipop/opencrow/opencrow-utility-toolbox"><img src="https://agentmods.dev/badge/skills/02loveslollipop/opencrow/opencrow-utility-toolbox.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00060 | $0.00504 |
| Opus 5.5 | $0.00024 | $0.00202 |
| Sonnet 5.5 | $0.00012 | $0.00101 |
| Haiku 4.5 | $0.00006 | $0.00050 |
Grade A, and why
opencrow-utility-toolbox 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
OpenCROW Utility Toolbox
Runtime preflight
Probe required commands with command -v and Python modules with importlib.util.find_spec before use. Prefer a PATH-resolved OpenCROW MCP helper or the ctf/sage environment when available, then the managed helper or system Python. If a capability is missing, stop that path safely and report the exact missing command or module.
Use this skill when the blocker is shell ergonomics or structured-data processing rather than a challenge-specific exploit primitive. It covers the “glue” layer that makes larger CTF workflows faster: jq, yq, xxd, tmux, screen, ripgrep, and fzf.
Quick Start
Start the MCP server from the installed CLI:
opencrow-utility-mcp
Verify the mapped stack:
python3 scripts/verify_toolkit.py
Workflow
- Start with the MCP server and call
toolbox_info,toolbox_verify, andtoolbox_capabilities. - Use
utility_searchfirst when a workspace is large and you need to narrow the problem before opening files manually. - Use
utility_json_queryorutility_yaml_querywhen configs, API responses, or challenge metadata need slicing before deeper analysis. - Use
utility_hexdumpwhen you need a fast bounded hex view of a file region. - Use
tmuxorscreenwhen the task benefits from persistent panes or background sessions. - Use the lifecycle MCP tools to record reproducible attempts, findings, and handoffs in the canonical documents.
- Use
opencrow-initonly to initialize a new full-install workspace; skills-only installations intentionally omit it.
Resources
opencrow-utility-mcp: stdio MCP server for typed workspace search, jq/yq queries, and xxd hexdumps.scripts/verify_toolkit.py: confirm that the mapped workflow helpers are installed.references/tooling.md: quick guidance for common shell utility choices.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 43 lines · 60 tokens per session scan A 25574a22249d
opencrow-utility-toolbox is a skill published in the GitHub repository 02loveslollipop/OpenCROW (10 stars, last pushed yesterday), licensed Apache-2.0. It adds 60 tokens to every session and 504 once invoked, about $0.0002 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 2026-08-31.
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