assumption-map

assumption-map is a skill for Claude Code from SanketSapkal/founder-skills. It costs 81 tokens per session (1,292 once invoked), scanned A, original, no licence file.

A method for listing and ranking the assumptions behind a project. It uses an impact-and-uncertainty view to identify which beliefs could matter most if they are wrong.

In plain words
What is it for?
Running a risk assessment, identifying what could go wrong, testing assumptions, and finding the riskiest parts of an idea.
Why use it?
It exposes risky beliefs before time is spent building the product, so the most important unknowns can be checked first.

Skill for Claude Code

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

Part of the founder-skills plugin — 27 skills shipped together

Good fit Running a risk assessment, identifying what could go wrong, testing assumptions, and finding the riskiest parts of an idea.

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

Made for: Claude Code.

Or install founder-skills, the plugin that ships this one along with the rest of its 27 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 assumption-map

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/sanketsapkal/founder-skills/assumption-map"><img src="https://agentmods.dev/badge/skills/sanketsapkal/founder-skills/assumption-map.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,292 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 unknown 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 $0.00081 $0.01292
Opus 5 $0.00041 $0.00646
Sonnet 5 $0.00016 $0.00258
Haiku 4.5 $0.00008 $0.00129

Measured 11d ago against content hash 60b3de15bbf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

assumption-map 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/assumption-map/SKILL.md · 120 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 120 lines · 81 tokens per session scan A 60b3de15bbf2

Subscribe to this mod's changes

assumption-map is a skill published in the GitHub repository SanketSapkal/founder-skills (9 stars, last pushed 4mo ago), with no licence file. It adds 81 tokens to every session and 1,292 once invoked, about $0.0004 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.

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