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 citedy/adclaw --skill file_readergit clone --depth 1 https://github.com/citedy/adclawWrote 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/citedy/adclaw/file_reader)<a href="https://agentmods.dev/skills/citedy/adclaw/file_reader"><img src="https://agentmods.dev/badge/skills/citedy/adclaw/file_reader/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/citedy/adclaw/file_reader"><img src="https://agentmods.dev/badge/skills/citedy/adclaw/file_reader.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00041 | $0.00425 |
| Opus 5.5 | $0.00016 | $0.00170 |
| Sonnet 5.5 | $0.00008 | $0.00085 |
| Haiku 4.5 | $0.00004 | $0.00042 |
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 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.
This is a copy
94% identical to file_reader — 11 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
File Reader Toolbox
Use this skill when the user asks to read or summarize local text-based files. PDFs, Office documents, images, audio, and video are out of scope for this skill and should be handled by their dedicated skills/tools.
Quick Type Check
Use a type probe before reading:
file -b --mime-type "/path/to/file"
If the file is large, avoid dumping the whole content; extract a small, relevant portion and summarize.
Text-Based Files (use read_file)
Preferred for: .txt, .md, .json, .yaml/.yml, .csv/.tsv, .log, .sql, ini, toml, py, js, html, xml source code.
Steps:
- Use
read_fileto fetch content. - Summarize key sections or show the relevant slice requested by the user.
- For JSON/YAML, list top-level keys and important fields.
- For CSV/TSV, show header + first few rows, then summarize columns.
Large Logs
If the file is huge, use a tail window:
tail -n 200 "/path/to/file.log"
Summarize the last errors/warnings and notable patterns.
Out of Scope
Do not handle the following in this skill (they are covered by other skills):
- Office (docx/xlsx/pptx)
- Images
- Audio/Video
Safety and Behavior
- Never execute untrusted files.
- Prefer reading the smallest portion necessary.
- If a tool is missing, explain the limitation and ask the user for an alternate format.
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 · 62 lines · 41 tokens per session scan A b68fda831a5e
file_reader is a skill published in the GitHub repository citedy/adclaw (42 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 41 tokens to every session and 425 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 94% identical to file_reader, differing in 11 lines, and is treated as a copy.
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