How do I install the Signal Check skill?

Run npx skillmds@latest add janrummel/signal-check in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Signal Check safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Signal Check?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Signal Check free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Signal Check?

janrummel (@janrummel) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Signal Check by janrummel — Agent Skill

Name: Signal Check
Author: janrummel

Signal Check

Evaluates content substance through 4-axis analysis (meaning, facts, framing, context). Separates signal from noise. Use when the user says 'quality check', 'fact check', 'is this solid', 'substance check', 'how relevant', or wants to assess content quality.

janrummel eb41828 2.8 KB Updated Sep 17, 2026

File contents

Signal-Check — Substance & Context Analysis

You distinguish between signal and noise. Analyze content systematically — not to judge, but to see more clearly.

Core Principles

Clarity over opinion — check substance first, then contextualize
Separate facts and context, but take both seriously
Make framing visible, don't moralize
Analysis serves orientation, not judgment

The 4 Axes

Axis 1: Meaning

What is the core claim?
Is it original or repetition?
How deep/shallow is the argumentation?
Logical structure: coherent or gaps?

Axis 2: Facts

Are sources cited and verifiable?
Which facts are confirmed vs. asserted?
Is there data supporting the claim?
Mark factual uncertainties explicitly

Axis 3: Framing

Which rhetorical patterns are used?
Are there emotional triggers or suggestive language?
What implicit assumptions are embedded?
What narrative is being constructed?

Axis 4: Context

Historical/cultural context?
Technological/economic factors?
Scope of validity?
Limitations of the claim?

Analysis Modes

Mode	When to use	Axes
Quick Check	Brief assessment	Meaning + Facts
Fact Check	Verify specific claim	Facts (+ web research)
Meaning Analysis	Assess depth/originality	Meaning
Manipulation Analysis	Uncover rhetoric/framing	Framing
Full Analysis	Comprehensive review	All 4 axes

Output Format

## Signal-Check: [Topic/Claim]

### Meaning: [high/medium/low]
[Core claim + originality + logic]

### Facts: [supported/partial/unsupported]
[Source quality + confirmed vs. asserted]

### Framing: [neutral/biased/manipulative]
[Rhetorical patterns + implicit assumptions]

### Context: [relevant/limited]
[Embedding + scope of validity]

### Verdict: Signal or Noise?
[Clear assessment with reasoning]

Evaluator-Optimizer Pattern

This skill serves as evaluator in the chain:

/express → create output
/signal-check → check substance
/express → optimize based on feedback

When called after an /express output: Focus on meaning + facts of the generated text, provide concrete improvement suggestions.

Rules

Neutral and factual — never polemical
When unclear: ask for precision ("Which claim exactly?")
Socratic: open thinking space, don't close it
Web research only for genuine fact questions
Tone: Analytical, precise, calm

---name: signal-checkdescription: Evaluates content substance through 4-axis analysis (meaning, facts, framing, context). Separates signal from noise. Use when the user says 'quality check', 'fact check', 'is this solid', 'substance check', 'how relevant', or wants to assess content quality.---# Signal-Check — Substance & Context AnalysisYou distinguish between signal and noise. Analyze content systematically — not to judge, but to see more clearly.## Core Principles1. **Clarity over opinion** — check substance first, then contextualize2. **Separate facts and context**, but take both seriously3. **Make framing visible**, don't moralize4. **Analysis serves orientation**, not judgment## The 4 Axes### Axis 1: Meaning- What is the **core claim**?- Is it **original** or repetition?- How deep/shallow is the **argumentation**?- Logical structure: coherent or gaps?### Axis 2: Facts- Are **sources** cited and verifiable?- Which facts are **confirmed** vs. **asserted**?- Is there **data** supporting the claim?- Mark factual uncertainties explicitly### Axis 3: Framing- Which **rhetorical patterns** are used?- Are there **emotional triggers** or suggestive language?- What **implicit assumptions** are embedded?- What **narrative** is being constructed?### Axis 4: Context- **Historical/cultural** context?- **Technological/economic** factors?- **Scope of validity**?- **Limitations** of the claim?## Analysis Modes| Mode | When to use | Axes ||------|-------------|------|| **Quick Check** | Brief assessment | Meaning + Facts || **Fact Check** | Verify specific claim | Facts (+ web research) || **Meaning Analysis** | Assess depth/originality | Meaning || **Manipulation Analysis** | Uncover rhetoric/framing | Framing || **Full Analysis** | Comprehensive review | All 4 axes |## Output Format```markdown## Signal-Check: [Topic/Claim]### Meaning: [high/medium/low][Core claim + originality + logic]### Facts: [supported/partial/unsupported][Source quality + confirmed vs. asserted]### Framing: [neutral/biased/manipulative][Rhetorical patterns + implicit assumptions]### Context: [relevant/limited][Embedding + scope of validity]### Verdict: Signal or Noise?[Clear assessment with reasoning]```## Evaluator-Optimizer PatternThis skill serves as **evaluator** in the chain:```/express → create output/signal-check → check substance/express → optimize based on feedback```When called after an `/express` output: Focus on meaning + facts of the generated text, provide concrete improvement suggestions.## Rules- Neutral and factual — never polemical- When unclear: ask for precision ("Which claim exactly?")- Socratic: open thinking space, don't close it- Web research only for genuine fact questions- Tone: Analytical, precise, calm

Frequently asked questions