How do I install the Ecc Product Lens skill?

Run npx skillmds@latest add undermybelt/ecc-product-lens in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Ecc Product Lens safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Ecc Product Lens?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Ecc Product Lens free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Ecc Product Lens?

undermybelt (@undermybelt) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Ecc Product Lens by undermybelt — Agent Skill

Name: Ecc Product Lens
Author: undermybelt

File contents

Product Lens — Think Before You Build

This lane owns product diagnosis, not implementation-ready specification writing.

If the user needs a durable PRD-to-SRS or capability-contract artifact, hand off to product-capability.

When to Use

Before starting any feature — validate the "why"
Weekly product review — are we building the right thing?
When stuck choosing between features
Before a launch — sanity check the user journey
When converting a vague idea into a product brief before engineering planning starts

How It Works

Mode 1: Product Diagnostic

Like YC office hours but automated. Asks the hard questions:

1. Who is this for? (specific person, not "developers")
2. What's the pain? (quantify: how often, how bad, what do they do today?)
3. Why now? (what changed that makes this possible/necessary?)
4. What's the 10-star version? (if money/time were unlimited)
5. What's the MVP? (smallest thing that proves the thesis)
6. What's the anti-goal? (what are you explicitly NOT building?)
7. How do you know it's working? (metric, not vibes)

Output: a PRODUCT-BRIEF.md with answers, risks, and a go/no-go recommendation.

If the result is "yes, build this," the next lane is product-capability, not more founder-theater.

Mode 2: Founder Review

Reviews your current project through a founder lens:

1. Read README, CLAUDE.md, package.json, recent commits
2. Infer: what is this trying to be?
3. Score: product-market fit signals (0-10)
   - Usage growth trajectory
   - Retention indicators (repeat contributors, return users)
   - Revenue signals (pricing page, billing code, Stripe integration)
   - Competitive moat (what's hard to copy?)
4. Identify: the one thing that would 10x this
5. Flag: things you're building that don't matter

Mode 3: User Journey Audit

Maps the actual user experience:

1. Clone/install the product as a new user
2. Document every friction point (confusing steps, errors, missing docs)
3. Time each step
4. Compare to competitor onboarding
5. Score: time-to-value (how long until the user gets their first win?)
6. Recommend: top 3 fixes for onboarding

Mode 4: Feature Prioritization

When you have 10 ideas and need to pick 2:

1. List all candidate features
2. Score each on: impact (1-5) × confidence (1-5) ÷ effort (1-5)
3. Rank by ICE score
4. Apply constraints: runway, team size, dependencies
5. Output: prioritized roadmap with rationale

Output

All modes output actionable docs, not essays. Every recommendation has a specific next step.

Integration

Pair with:

/browser-qa to verify the user journey audit findings
/design-system audit for visual polish assessment
/canary-watch for post-launch monitoring
product-capability when the product brief needs to become an implementation-ready capability plan

---name: ecc-product-lensdescription: Use this skill to validate the "why" before building, run product diagnostics, and pressure-test product direction before the request becomes an implementation contract.---# Product Lens — Think Before You BuildThis lane owns product diagnosis, not implementation-ready specification writing.If the user needs a durable PRD-to-SRS or capability-contract artifact, hand off to `product-capability`.## When to Use- Before starting any feature — validate the "why"- Weekly product review — are we building the right thing?- When stuck choosing between features- Before a launch — sanity check the user journey- When converting a vague idea into a product brief before engineering planning starts## How It Works### Mode 1: Product DiagnosticLike YC office hours but automated. Asks the hard questions:```1. Who is this for? (specific person, not "developers")2. What's the pain? (quantify: how often, how bad, what do they do today?)3. Why now? (what changed that makes this possible/necessary?)4. What's the 10-star version? (if money/time were unlimited)5. What's the MVP? (smallest thing that proves the thesis)6. What's the anti-goal? (what are you explicitly NOT building?)7. How do you know it's working? (metric, not vibes)```Output: a `PRODUCT-BRIEF.md` with answers, risks, and a go/no-go recommendation.If the result is "yes, build this," the next lane is `product-capability`, not more founder-theater.### Mode 2: Founder ReviewReviews your current project through a founder lens:```1. Read README, CLAUDE.md, package.json, recent commits2. Infer: what is this trying to be?3. Score: product-market fit signals (0-10) - Usage growth trajectory - Retention indicators (repeat contributors, return users) - Revenue signals (pricing page, billing code, Stripe integration) - Competitive moat (what's hard to copy?)4. Identify: the one thing that would 10x this5. Flag: things you're building that don't matter```### Mode 3: User Journey AuditMaps the actual user experience:```1. Clone/install the product as a new user2. Document every friction point (confusing steps, errors, missing docs)3. Time each step4. Compare to competitor onboarding5. Score: time-to-value (how long until the user gets their first win?)6. Recommend: top 3 fixes for onboarding```### Mode 4: Feature PrioritizationWhen you have 10 ideas and need to pick 2:```1. List all candidate features2. Score each on: impact (1-5) × confidence (1-5) ÷ effort (1-5)3. Rank by ICE score4. Apply constraints: runway, team size, dependencies5. Output: prioritized roadmap with rationale```## OutputAll modes output actionable docs, not essays. Every recommendation has a specific next step.## IntegrationPair with:- `/browser-qa` to verify the user journey audit findings- `/design-system audit` for visual polish assessment- `/canary-watch` for post-launch monitoring- `product-capability` when the product brief needs to become an implementation-ready capability plan

Frequently asked questions

Ecc Product Lens