file-reader

file-reader is a skill for Claude Code, Codex from pilinux/gorest. It costs 23 tokens per session (225 once invoked), scanned A, original, MIT.

A precise source-file reading guide that extracts facts from selected code and includes file-and-line references.

In plain words
What is it for?
Use it to inspect a function or small code section before making a decision or edit, and to document its inputs, outputs, side effects, and errors.
Why use it?
It reduces the need to read whole files when you only need exact signatures, constants, behavior, or error handling. It also avoids changing files or running commands during the review.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/pilinux/gorest/file-reader
Any agent
npx skills add pilinux/gorest --skill file-reader
Clone the repo
git clone --depth 1 https://github.com/pilinux/gorest

Made for: Claude Code, Codex.

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 file-reader

README.md
[![agentmods](https://agentmods.dev/badge/skills/pilinux/gorest/file-reader.svg)](https://agentmods.dev/skills/pilinux/gorest/file-reader)
Your own site
<a href="https://agentmods.dev/skills/pilinux/gorest/file-reader"><img src="https://agentmods.dev/badge/skills/pilinux/gorest/file-reader.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 225 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00023 $0.00225
Opus 5 $0.00012 $0.00112
Sonnet 5 $0.00005 $0.00045
Haiku 4.5 $0.00002 $0.00022

Measured 5d ago against content hash 76eb2474aeeb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

file-reader 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 5d 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.

.agents/skills/file-reader/SKILL.md · 40 lines

What it actually says

File Reader

When to Use

  • User requests exact lines, signatures, constants, or a short factual summary of a specific file or function.

Responsibilities

  • Read only the minimum necessary lines and provide path:line citations.
  • Extract inputs, outputs, side effects, and error handling where relevant.

Rules

  • Do not modify files or run shell commands.
  • Prefer targeted reads over whole-file dumps.

Output

  • 2-6 sentence summary.
  • Minimal code snippets (only necessary lines) with path:line.
  • Suggested follow-ups (1-2 paths).

Examples

  • "Show the password hashing implementation in lib/ with exact lines."
  • "What does model.Auth look like including struct tags?"
  • explain-code (synthesis), code-navigation (locate files)
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. 5d ago First seen · 40 lines · 23 tokens per session scan A 76eb2474aeeb

Subscribe to this mod's changes

file-reader is a skill published in the GitHub repository pilinux/gorest (504 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 225 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 2026-08-30.