assumption-mapper
Extract and risk-rate hidden assumptions in a product brief or PRD. Use when asked to review a product brief for assumptions, audit a PRD for risks, find hidden assumptions, validate product plans, or run an assumption analysis. Produces a prioritised assumption map with confidence and impact scores, recommended validation methods, and critical assumption flags.
npx skills add mohitagw15856/pm-claude-skills --skill assumption-mapper --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Assumption Mapper Skill Surface and prioritize the untested assumptions embedded in any product plan before development begins. ## Required Inputs Ask the user for these if not provided: - **Product brief, PRD, or concept description** (even rough notes work) - **Stage** (concept / discovery / pre-build / post-launch — affects which assumptions matter most) ## Process 1. Read the provided brief, PRD, or concept description 2. Extract assumptions across four categories: - **Desirability** (do users want this?) - **Feasibility** (can we build it?) - **Viability** (will it sustain the business?) - **Usability** (can users actually use it?) 3. Score each assumption: - Confidence (1-5): How sure are we this is true? - Impact (1-5): How badly does the plan fail if this assumption is wrong? - Priority = Impact − Confidence (higher = test first) 4. **Validate completeness** — Ensure at least one assumption per category. If a category is empty, re-read the brief looking specifically for that type. 5. Output a ranked list with recommended validation methods ## Output Structure ### Assumption Map: [Feature/Product Name] | Assumption | Category | Confidence | Impact | Priority | Validation M
- Required Inputs
- Process
- Output Structure
- Assumption Map: [Feature/Product Name]
- Example (Partial)
- Anti-Patterns
- Deeper Materials
- Scoring Rubric (0–40)
- Quality Checks
What does the assumption-mapper skill do?
Extract and risk-rate hidden assumptions in a product brief or PRD. Use when asked to review a product brief for assumptions, audit a PRD for risks, find hidden assumptions, validate product plans, or run an assumption analysis. Produces a prioritised assumption map with confidence and impact scores, recommended validation methods, and critical assumption flags.
How do I install it?
Run `npx skills add mohitagw15856/pm-claude-skills --skill assumption-mapper --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From mohitagw15856/pm-claude-skills, a repository with 1,255 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.