bat

bat is a skill for Claude Code from moabualruz/fulcrum. It costs 46 tokens per session (194 once invoked), scanned A, original, MIT.

A skill for displaying source and configuration files in a terminal with syntax colors and line numbers.

In plain words
What is it for?
Use it when viewing files or diffs for human review instead of plain unformatted output.
Why use it?
It makes code and configuration easier for a person to inspect directly in the terminal.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fulcrum plugin — 32 skills shipped together

Good fit Use it when viewing files or diffs for human review instead of plain unformatted output.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/moabualruz/fulcrum/bat
Install

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.

Any agent
npx skills add moabualruz/fulcrum --skill bat
Clone the repo
git clone --depth 1 https://github.com/moabualruz/fulcrum

Made for: Claude Code.

Or install fulcrum, the plugin that ships this one along with the rest of its 32 skills.

Wrote 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.

agentmods badge for bat

README.md
[![agentmods](https://agentmods.dev/badge/skills/moabualruz/fulcrum/bat/github.svg)](https://agentmods.dev/skills/moabualruz/fulcrum/bat)
Your own site
<a href="https://agentmods.dev/skills/moabualruz/fulcrum/bat"><img src="https://agentmods.dev/badge/skills/moabualruz/fulcrum/bat/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.

agentmods 80×15 button for bat

Your own site · 80×15
<a href="https://agentmods.dev/skills/moabualruz/fulcrum/bat"><img src="https://agentmods.dev/badge/skills/moabualruz/fulcrum/bat.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 194 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.00194
Opus 5.5 $0.00018 $0.00078
Sonnet 5.5 $0.00009 $0.00039
Haiku 4.5 $0.00005 $0.00019

Measured 1mo ago against content hash 13cd5196945d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bat 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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

  • just — 92% identical, 6 lines differ
  • gitleaks — 92% identical, 6 lines differ
  • zoxide — 91% identical, 6 lines differ
  • yq — 89% identical, 10 lines differ
  • osv-scanner — 89% identical, 6 lines differ
  • tool-name — 88% identical, 7 lines differ
  • pmd — 86% identical, 6 lines differ
  • difftastic — 86% identical, 6 lines differ
plugins/fulcrum/skills/bat/SKILL.md · 28 lines

What it actually says

bat

When to use

See references/when-to-use.md. Load only when this section is needed.

Invocation

See references/invocation.md. Load only when this section is needed.

Patterns

See references/patterns.md. Load only when this section is needed.

Anti-patterns

See references/anti-patterns.md. Load only when this section is needed.

Cross-refs

See references/cross-refs.md. Load only when this section is needed.

Files

What ships with it

5 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.

Changes

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.

  1. 1mo ago First seen · 28 lines · 46 tokens per session scan A 13cd5196945d

Subscribe to this mod's changes

bat is a skill published in the GitHub repository moabualruz/fulcrum (7 stars, last pushed 23d ago), licensed MIT. It adds 46 tokens to every session and 194 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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