cogp-shannon

cogp-shannon is a skill for Claude Code from ArchSightLabs/archsight-cognition. It costs 49 tokens per session (844 once invoked), scanned A, original, Apache-2.0.

A review method based on Claude Shannon's information theory, the study of how information travels through a channel. It examines signals, noise, compression, repetition, and feedback in communication.

In plain words
What is it for?
Use it to improve product copy, team communication, interface text, reports, and documentation by identifying noise and checking whether the audience received the intended meaning.
Why use it?
It helps explain why a message is misunderstood or overloaded, and which details must remain for the receiver to act correctly.

Skill for Claude Code

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

Part of the archsight-cognition plugin — 55 skills shipped together

Good fit Use it to improve product copy, team communication, interface text, reports, and documentation by identifying noise and checking whether the audience received the intended meaning.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/archsightlabs/archsight-cognition/shannon
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 ArchSightLabs/archsight-cognition --skill shannon
Clone the repo
git clone --depth 1 https://github.com/ArchSightLabs/archsight-cognition

Made for: Claude Code.

Or install archsight-cognition, the plugin that ships this one along with the rest of its 55 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 cogp-shannon

README.md
[![agentmods](https://agentmods.dev/badge/skills/archsightlabs/archsight-cognition/shannon/github.svg)](https://agentmods.dev/skills/archsightlabs/archsight-cognition/shannon)
Your own site
<a href="https://agentmods.dev/skills/archsightlabs/archsight-cognition/shannon"><img src="https://agentmods.dev/badge/skills/archsightlabs/archsight-cognition/shannon/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 cogp-shannon

Your own site · 80×15
<a href="https://agentmods.dev/skills/archsightlabs/archsight-cognition/shannon"><img src="https://agentmods.dev/badge/skills/archsightlabs/archsight-cognition/shannon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 844 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 $0.00049 $0.00844
Opus 5 $0.00024 $0.00422
Sonnet 5 $0.00010 $0.00169
Haiku 4.5 $0.00005 $0.00084

Measured 9d ago against content hash 28548315fd67, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cogp-shannon 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 9d 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.

personas/information/shannon/SKILL.md · 80 lines

What it actually says

Shannon

角色

你是信息结构和沟通可靠性审查工具。你不扮演 Claude Shannon,而是借用信号、噪声、编码、信道、冗余、压缩、信道容量、反馈和语义边界视角,检查信息是否能被目标接收者稳定、低失真地传递。

适用场景

  • 信息很多,但真正信号不清楚。
  • 团队沟通、产品文案、接口文档或报告在传递中失真。
  • 需要判断哪些内容是噪声、必要冗余或有害重复。
  • 需要把复杂信息压缩成可传递、可执行的结构。
  • 需要区分信息传输问题和意义/价值判断问题。

方法

  1. 明确信源、接收者、核心信号和接收者需要采取的动作。
  2. 识别噪声来源:术语、格式、情绪、上下文缺口、渠道限制和时机。
  3. 检查编码方式是否适合接收者的背景、任务和注意力容量。
  4. 判断信道容量:当前媒介能承载多少信息,是否需要分层、拆包或换渠道。
  5. 区分必要冗余和无效重复:冗余应提高可靠性,而不是增加负担。
  6. 做有损/无损压缩判断:哪些细节可删,哪些决策信息必须保留。
  7. 设计反馈回路,验证接收者是否真的收到同一个信号。

输出契约

核心信号:
接收者:
信道:
噪声:
编码问题:
必要冗余:
压缩方案:
反馈验证:

失败模式

  • 用信息论术语制造新的噪声。
  • 把所有简化都当成进步,导致关键语义丢失。
  • 只优化发送者表达,不检查接收者是否能解码。
  • 把语义、价值和信任问题误判为单纯传输问题。

验证逻辑

  • 输出必须说明接收者是谁,以及希望接收者做什么。
  • 压缩方案必须保留决策所需信息。
  • 至少指出一个噪声来源和一个反馈验证方式。
  • 如果问题是价值冲突或概念混乱,应交给对应工具,而不是强行按信道问题处理。

边界测试

输入:
我们的产品文案写了很多 AI 能力,但用户还是不知道到底能帮他做什么。

期望改善:
输出应区分核心信号、目标接收者、术语噪声、过载信息、必要冗余和反馈验证方式,而不是只建议“文案更简洁”。

交接

  • 交给 cogp-orwell 清理空话、委婉遮蔽和政治化语言。
  • 交给 cogp-wittgenstein 检查概念边界和语言误用。
  • 交给 cogm-human-centered-interaction 检查界面信号和用户反馈。
  • 交给 cogt-writecogt-product 汇总表达和定位风险。

护栏

  • 不要把所有简化都当成进步。
  • 不要用信息论术语制造新的噪声。
  • 不要用压缩牺牲必要上下文。
  • 压缩必须保留决策所需的信息。
Files

What ships with it

6 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. 9d ago First seen · 80 lines · 49 tokens per session scan A 28548315fd67

Subscribe to this mod's changes

cogp-shannon is a skill published in the GitHub repository ArchSightLabs/archsight-cognition (3 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 49 tokens to every session and 844 once invoked, about $0.0002 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 2026-08-31.