ClaudSkills / Product / design-system-ui

Epistemic Mapper

Q: What is a Claude Code skill and how does the Epistemic Mapper skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Epistemic Mapper is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: design-system-ui · Last updated: 2026-09-28

Build or update a canonical EPISTEMIC-MAP.md sorting a project's knowledge into four states: validated Facts, open Questions, undocumented Assumptions, and inferred Risks. Purpose-built for prototype-to-production handoff, where a signed contract means a new engineering team must take over before the original builder's tacit knowledge walks out the door. Spawns subagents across docs and the codebase to find what's proven, what's asked, what's silently assumed, and what nobody has noticed, then runs a dedicated synthesis pass for systemic risks no single source states. Use whenever a user mentions \"epistemic map\", \"knowledge map\", \"EPISTEMIC-MAP.md\", \"known unknowns\", \"unknown unknowns\", \"what do we actually know vs assume\", \"map our assumptions\", \"handoff risk map\", \"prototype handoff\", or \"onboarding a team onto a prototype\". Always prefer this skill over ad-hoc knowledge-gap documentation.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Extract a project's knowledge state from its documentation and its code, then sort every observation into one of four quadrants and write the result into a canonical EPISTEMIC-MAP.md. This is a handoff artifact: it exists because a prototype builder holds a mass of tacit knowledge that never got written down, and once a contract is signed and a team takes over, that knowledge either gets captured now or gets rediscovered the hard way, in production.

HIGH CERTAINTY (validated)
                              |
          [ ASSUMPTIONS ]    |    [ FACTS ]
          Unknown Known      |    Known Known
          nobody wrote it    |    proven, cited
          down, but the      |    evidence
          code/docs rely     |
          on it              |
    ------------------------ + ------------------------
                              |
…

What this skill does

Epistemic Mapper is a community-contributed Claude Code skill in the design-system-ui sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/epistemic-mapper/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use whenever a user mentions \"epistemic map\", \"knowledge map\", \"EPISTEMIC-MAP.md\", \"known unknowns\", \"unknown unknowns\", \"what do we actually know vs assume\", \"map our assumptions\", \"handoff risk map\", \"prototype handoff\", or \"onboarding a team onto a prototype\".

Who uses this skill

The Epistemic Mapper Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/epistemic-mapper
curl -L https://claudskills.com/skills/epistemic-mapper/SKILL.md \
  -o ~/.claude/skills/epistemic-mapper/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/epistemic-mapper/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/epistemic-mapper/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\epistemic-mapper\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Epistemic Mapper Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/epistemic-mapper/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Epistemic Mapper skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Epistemic Mapper skill?

Use Epistemic Mapper when your Claude Code task falls under the Product category — specifically in the design system ui area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Epistemic Mapper" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Epistemic Mapper skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Epistemic Mapper is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/Mr-Nobody-Anonymous/All-skills/blob/913b5d5747933726aacc5d63253b3d340a04ed16/awesome_skills/ai-evaluation/epistemic-mapper/SKILL.md
License: MIT
Author: Mr-Nobody-Anonymous
Website: https://github.com/Mr-Nobody-Anonymous/All-skills

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

Mr-Nobody-Anonymous. (2026). Epistemic Mapper [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/epistemic-mapper/

BibTeX

@misc{epistemic-mapper-2026,
  author    = {Mr-Nobody-Anonymous},
  title     = {Epistemic Mapper [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/epistemic-mapper/}
}

Embed this skill

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Badge

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/epistemic-mapper/#security)

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