# Opencrow Utility Toolbox

> Use the OpenCROW utility stack for shell-heavy CTF workflows. Use when an agent needs `jq`, `yq`, `xxd`, `tmux`, `screen`, `rg`, or `fzf` to glue a larger workflow together.

- **Type:** Skill
- **Install:** `agentstack add skill-02loveslollipop-opencrow-opencrow-utility-toolbox`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [02loveslollipop](https://agentstack.voostack.com/s/02loveslollipop)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [02loveslollipop](https://github.com/02loveslollipop)
- **Source:** https://github.com/02loveslollipop/OpenCROW/tree/main/skills/opencrow-utility-toolbox

## Install

```sh
agentstack add skill-02loveslollipop-opencrow-opencrow-utility-toolbox
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# 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:

```bash
opencrow-utility-mcp
```

Verify the mapped stack:

```bash
python3 scripts/verify_toolkit.py
```

## Workflow

1. Start with the MCP server and call `toolbox_info`, `toolbox_verify`, and `toolbox_capabilities`.
2. Use `utility_search` first when a workspace is large and you need to narrow the problem before opening files manually.
3. Use `utility_json_query` or `utility_yaml_query` when configs, API responses, or challenge metadata need slicing before deeper analysis.
4. Use `utility_hexdump` when you need a fast bounded hex view of a file region.
5. Use `tmux` or `screen` when the task benefits from persistent panes or background sessions.
6. Use the lifecycle MCP tools to record reproducible attempts, findings, and handoffs in the canonical documents.
7. Use `opencrow-init` only 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.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [02loveslollipop](https://github.com/02loveslollipop)
- **Source:** [02loveslollipop/OpenCROW](https://github.com/02loveslollipop/OpenCROW)
- **License:** Apache-2.0

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-02loveslollipop-opencrow-opencrow-utility-toolbox
- Seller: https://agentstack.voostack.com/s/02loveslollipop
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.