assumption-mapping

assumption-mapping is a skill for Claude Code, Codex from risadams/ink-and-agency. It costs 59 tokens per session (849 once invoked), scanned A, original, no licence file.

A method for listing the beliefs a product idea, feature, or strategy depends on and sorting them by risk. An assumption is something treated as true before it has been confirmed.

In plain words
What is it for?
Use it to map assumptions, identify what could go wrong, validate ideas, and reduce product or strategy risk.
Why use it?
It helps reveal which untested beliefs could cause the work to fail and which ones should be checked first.

Skill for Claude CodeCodex

Written for Claude Code and Codex: allowed-tools in frontmatter, but also agents/openai.yaml present.

Part of the ink-and-agency plugin — 196 skills shipped together

Good fit Use it to map assumptions, identify what could go wrong, validate ideas, and reduce product or strategy risk.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/risadams/ink-and-agency/assumption-mapping
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 risadams/ink-and-agency --skill assumption-mapping
Clone the repo
git clone --depth 1 https://github.com/risadams/ink-and-agency

Made for: Claude Code, Codex.

Or install ink-and-agency, the plugin that ships this one along with the rest of its 196 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-mapping

README.md
[![agentmods](https://agentmods.dev/badge/skills/risadams/ink-and-agency/assumption-mapping/github.svg)](https://agentmods.dev/skills/risadams/ink-and-agency/assumption-mapping)
Your own site
<a href="https://agentmods.dev/skills/risadams/ink-and-agency/assumption-mapping"><img src="https://agentmods.dev/badge/skills/risadams/ink-and-agency/assumption-mapping/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-mapping

Your own site · 80×15
<a href="https://agentmods.dev/skills/risadams/ink-and-agency/assumption-mapping"><img src="https://agentmods.dev/badge/skills/risadams/ink-and-agency/assumption-mapping.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 849 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 $0.00059 $0.00849
Opus 5 $0.00030 $0.00425
Sonnet 5 $0.00012 $0.00170
Haiku 4.5 $0.00006 $0.00085

Measured 11d ago against content hash b44d1d3a3bbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

assumption-mapping 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-mapping/SKILL.md · 115 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

2 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 · 115 lines · 59 tokens per session scan A b44d1d3a3bbd

Subscribe to this mod's changes

assumption-mapping is a skill published in the GitHub repository risadams/ink-and-agency (2 stars, last pushed 1mo ago), with no licence file. It adds 59 tokens to every session and 849 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 2026-08-31.

Related

Other skills, from other repositories

hive.chart-creation-foundations

Required reading whenever any chart tool is available. Teaches the one-tool embedding contract (call chartrender → live chart appears in chat AND a downloadable PNG lands in the queen session dir), the ECharts (data viz) vs Mermaid (structural diagrams) decision, the BI/financial-grade aesthetic baseline (no…

aden-hive/hive · 133 tokens

browser-edge-cases

SOP for debugging browser automation failures on complex websites. Use when browser tools fail on specific sites like LinkedIn, Twitter/X, SPAs, or sites with Shadow DOM.

aden-hive/hive · 40 tokens

shogun-screenshot

A screenshot tool for getting images from a computer or web page and then cropping, resizing, or masking sensitive information. Playwright is a browser-automation tool used here to capture web pages.

yohey-w/multi-agent-shogun · 149 tokens

agent-qa-testing

Agent davranis testi ve protokol uyumluluk dogrulamasi. Agent'larin tanimli rollerine uygun davranip davranmadigini assertion-based test'lerle olcer. Personality drift, role violation ve output kalite regresyonu tespit eder.

vibeeval/vibecosystem · 58 tokens

aws-patterns

Lambda best practices, S3 event patterns, SQS/SNS fanout, and DynamoDB access patterns for serverless AWS architectures.

vibeeval/vibecosystem · 31 tokens

review

Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/PRD asked for?). Runs both reviews in parallel sub-agents and reports them side by side. Use…

stevesolun/ctx · 95 tokens