diagnose

diagnose is a skill for Claude Code, Codex from getagentseal/founder-playbook. It costs 106 tokens per session (2,372 once invoked), scanned A, original, MIT.

A diagnostic guide for finding the root cause of a startup problem before choosing a business framework. It sorts problems into areas such as product, market, and other startup failure modes.

In plain words
What is it for?
Use it when you do not know where to start, several problems overlap, or you need to decide which startup framework best fits the situation.
Why use it?
It helps avoid applying a useful method to the wrong problem. That matters when a vague issue, such as poor sales, could come from several different causes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when you do not know where to start, several problems overlap, or you need to decide which startup framework best fits the situation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/getagentseal/founder-playbook/diagnose
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 getagentseal/founder-playbook --skill diagnose
Clone the repo
git clone --depth 1 https://github.com/getagentseal/founder-playbook

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 diagnose

README.md
[![agentmods](https://agentmods.dev/badge/skills/getagentseal/founder-playbook/diagnose/github.svg)](https://agentmods.dev/skills/getagentseal/founder-playbook/diagnose)
Your own site
<a href="https://agentmods.dev/skills/getagentseal/founder-playbook/diagnose"><img src="https://agentmods.dev/badge/skills/getagentseal/founder-playbook/diagnose/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 diagnose

Your own site · 80×15
<a href="https://agentmods.dev/skills/getagentseal/founder-playbook/diagnose"><img src="https://agentmods.dev/badge/skills/getagentseal/founder-playbook/diagnose.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 106 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,372 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
  • Socket pass 26 Apr 2026
  • Snyk pass 26 Apr 2026
  • 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 $0.00106 $0.02372
Opus 5 $0.00053 $0.01186
Sonnet 5 $0.00021 $0.00474
Haiku 4.5 $0.00011 $0.00237

Measured 9d ago against content hash a67a9dbc95af, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

diagnose 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.

diagnose/SKILL.md · 205 lines

How it starts

The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Note: This skill is independent analysis and commentary, not a reproduction of any original text. It synthesizes frameworks from multiple books with modern startup practice and routes founders to the right tool for their situation.

Diagnose

"The dangerous moment is when you apply the right framework to the wrong problem."

When to Use This Skill

Do you know exactly what's broken?
|-- YES --> Do you know which framework to use?
|   |-- YES --> Go use that skill directly. You don't need this.
|   +-- NO  --> THIS SKILL. You know the problem, need the tool.
+-- NO  --> THIS SKILL. Start here.

This skill exists because frameworks are tools, not answers. A hammer doesn't help when the problem is a screw. The first job is diagnosis — figuring out what's actually broken before reaching for any specific framework.


The Five Failure Modes

Every startup problem maps to one of five root causes. Most founders misdiagnose which one they have.

Failure Mode What It Looks Like Common Misdiagnosis
Product People try it and stop using it "We need better marketing"
Market Can't find anyone who cares enough to pay "We need to build more features"
Messaging Good product, people don't understand what it does "The product must be wrong"
Distribution People would buy it but never hear about it "We need a better website"
Pricing People want it but won't pay what you charge "We need more features to justify the price"

The Misdiagnosis Problem

Founders almost always misdiagnose their problem by one layer. The pattern:

ACTUAL PROBLEM:        WHAT FOUNDERS THINK:        WHAT THEY DO:
Product problem    →   "Marketing isn't working"   →   Spend on ads (waste)
Market problem     →   "Need more features"        →   Build for months (waste)
Messaging problem  →   "Product must be wrong"     →   Pivot prematurely (waste)
Distribution       →   "Need better website"       →   Redesign 5 times (waste)
Pricing problem    →   "Need more value"            →   Add features nobody asked for (waste)

Read the full file on GitHub · 205 lines

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 · 205 lines · 106 tokens per session scan A a67a9dbc95af

Subscribe to this mod's changes

diagnose is a skill published in the GitHub repository getagentseal/founder-playbook (553 stars, last pushed 1mo ago), licensed MIT. It adds 106 tokens to every session and 2,372 once invoked, about $0.0005 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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