sec-plain-english

sec-plain-english is a skill for Claude Code, Codex from Neeeophytee/agent-stylebooks. It costs 67 tokens per session (802 once invoked), scanned A, original, MIT.

A plain-language writing guide for investor-facing financial and legal disclosures, based on official SEC guidance. The SEC is the United States regulator for securities markets and investor protection.

In plain words
What is it for?
It supports prospectus summaries, risk factors, shareholder letters, offering materials, and securities disclosures.
Why use it?
It makes important financial and legal information easier to understand without changing its meaning, conditions, risks, or required wording. It also keeps legal review and uncertainty visible.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the agent-stylebooks plugin — 16 skills shipped together

Good fit It supports prospectus summaries, risk factors, shareholder letters, offering materials, and securities disclosures.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/neeeophytee/agent-stylebooks/sec-plain-english
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 Neeeophytee/agent-stylebooks --skill sec-plain-english
Clone the repo
git clone --depth 1 https://github.com/Neeeophytee/agent-stylebooks

Made for: Claude Code, Codex.

Or install agent-stylebooks, the plugin that ships this one along with the rest of its 16 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 sec-plain-english

README.md
[![agentmods](https://agentmods.dev/badge/skills/neeeophytee/agent-stylebooks/sec-plain-english/github.svg)](https://agentmods.dev/skills/neeeophytee/agent-stylebooks/sec-plain-english)
Your own site
<a href="https://agentmods.dev/skills/neeeophytee/agent-stylebooks/sec-plain-english"><img src="https://agentmods.dev/badge/skills/neeeophytee/agent-stylebooks/sec-plain-english/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 sec-plain-english

Your own site · 80×15
<a href="https://agentmods.dev/skills/neeeophytee/agent-stylebooks/sec-plain-english"><img src="https://agentmods.dev/badge/skills/neeeophytee/agent-stylebooks/sec-plain-english.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 802 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00067 $0.00802
Opus 5 $0.00034 $0.00401
Sonnet 5 $0.00013 $0.00160
Haiku 4.5 $0.00007 $0.00080

Measured 11d ago against content hash 859b89b715ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

sec-plain-english 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 11d 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.

skills/sec-plain-english/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEC plain English

Make material information understandable to an investor without changing the legal or economic substance. This skill is a writing aid, not legal or securities-law compliance advice.

Lock the disclosure record

  • Inventory every material fact, number, defined term, condition, exception, cross-reference, risk, and forward-looking qualification before rewriting.
  • Preserve the scope and strength of may, could, expect, believe, subject to, and similar language. Never convert a conditional statement into a certainty.
  • Do not add a legal conclusion, safe-harbor claim, performance promise, or compliance claim.
  • Keep required legends and mandated wording unchanged unless securities counsel authorizes revision. Flag conflicts between clarity and required language.
  • Require legal and subject-matter review before filing or distributing regulated disclosure.

Design for the investor's decision

  1. Identify the intended investor and the decision the document supports.
  2. Put material, issuer-specific information before process history and boilerplate.
  3. State the transaction, security, price or valuation basis, use of proceeds, dilution, conflicts, and principal risks where applicable and supported.
  4. Group related facts so the reader does not have to join a claim to a distant exception.
  5. Move detail only when the summary remains fair and the full qualification is easy to find.

Explain risks as relationships

  • Name the condition or cause, the event that may occur, and the consequence for the investor or issuer.
  • State who or what is exposed, the relevant time horizon, and any concentration or dependency.
  • Distinguish a current circumstance from a hypothetical future risk.
  • Keep mitigating factors separate and proportionate; do not use them to cancel the risk.
  • Remove generic risk language only when counsel confirms that no material meaning is lost.
  • Do not rank or label a risk as likely, remote, severe, or immaterial without support.

Read the full file on GitHub · 74 lines

Files

What ships with it

3 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. 11d ago First seen · 74 lines · 67 tokens per session scan A 859b89b715ad

Subscribe to this mod's changes

sec-plain-english is a skill published in the GitHub repository Neeeophytee/agent-stylebooks (60 stars, last pushed 19d ago), licensed MIT. It adds 67 tokens to every session and 802 once invoked, about $0.0003 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.

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