customer-interviews

customer-interviews is a skill for Claude Code, Codex from impactbrussels/FounderOS. It costs 100 tokens per session (1,274 once invoked), scanned A, original, Apache-2.0.

A guide for interviewing potential customers to learn about their real problems and past behaviour. It uses the Mom Test, a customer-research approach that avoids asking questions likely to produce polite compliments.

In plain words
What is it for?
It is for choosing relevant interviewees, writing neutral questions, running customer-discovery calls, and turning conversations into product evidence.
Why use it?
It helps founders avoid mistaking encouragement for evidence that an idea is needed. Focusing on what people actually do gives more useful information for deciding what to build.

Skill for Claude CodeCodex

Part of the founderos plugin — 23 skills, 3 agents shipped together

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.

agentmods
npx agentmods add skills/impactbrussels/founderos/customer-interviews
Any agent
npx skills add impactbrussels/FounderOS --skill customer-interviews
Clone the repo
git clone --depth 1 https://github.com/impactbrussels/FounderOS

Made for: Claude Code, Codex.

Or install founderos, the plugin that ships this one along with the rest of its 23 skills, 3 agents.

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 customer-interviews

README.md
[![agentmods](https://agentmods.dev/badge/skills/impactbrussels/founderos/customer-interviews.svg)](https://agentmods.dev/skills/impactbrussels/founderos/customer-interviews)
Your own site
<a href="https://agentmods.dev/skills/impactbrussels/founderos/customer-interviews"><img src="https://agentmods.dev/badge/skills/impactbrussels/founderos/customer-interviews.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,274 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00100 $0.01274
Opus 5 $0.00050 $0.00637
Sonnet 5 $0.00020 $0.00255
Haiku 4.5 $0.00010 $0.00127

Measured 4d ago against content hash b8c4dd80c94d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

customer-interviews 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 4d 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/customer-interviews/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Customer Interviews (the Mom Test)

First-time founders run "interviews" that are really pitches in disguise, then walk away with a notebook full of "yeah, I'd totally use that" - and build the wrong thing for a year. The problem isn't the people; it's the questions. Anyone, even your mom, will lie to you if you ask whether your idea is good. They won't lie about their own life. This skill makes you ask about their life, their past behaviour, and their real pain - never your idea - so the data you collect is worth building on.

The method

Built on the Founder OS scaffold (High tier). Full question bank, rules, and synthesis template in references/interview-guide.md.

Step 1 - Pick who to talk to

Talk to people who plausibly have [PROBLEM] now, not a random "target market." Define a tight screen for [ICP]: a role, a behaviour, a recent trigger ("bought X in the last month", "manages Y today"). 5-10 of the right people beats 50 randoms. Friends and family don't count - they protect your feelings (see Constraints).

Step 2 - Write non-leading questions

The whole game is removing yourself and your idea from the question. Bad questions invite a compliment ("Would you use an app that…?"). Good questions excavate the past ("Walk me through the last time you dealt with [PROBLEM]"). Build a script of 5-8 questions about their life and past behaviour, ordered from broad to specific. Keep [ONE_LINER] out of your mouth.

Step 3 - Run the conversation

Make it a conversation, not a survey. Open broad, then dig for specifics: "When was the last time?", "What did you do next?", "How much did that cost you - in time or money?". Shut up and listen - silence pulls out the truth. Don't pitch, don't correct, don't sell. Your job is to learn, not to be liked.

Step 4 - Spot good vs. bad signals

Score what you heard against the signal table. Specific past stories, emotion, money/time already spent, and concrete commitments are gold. Generic futures, compliments, and "yes I would" are noise - a draft is not a decision, and a polite "yes" is not a customer. Capture each as a real signal or an anti-signal.

Read the full file on GitHub · 89 lines

Files

What ships with it

1 file 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. 4d ago First seen · 89 lines · 100 tokens per session scan A b8c4dd80c94d

Subscribe to this mod's changes

customer-interviews is a skill published in the GitHub repository impactbrussels/FounderOS (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 100 tokens to every session and 1,274 once invoked, about $0.0005 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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