What is build-my-brain?

An interactive intake that creates a BUSINESS-BRAIN.md file containing a business's voice, context, and positioning. It gathers some answers from the user and uses online research to fill in other sections.

Use it to build a business profile from LinkedIn, a website, competitors, and Reddit research, then save the result for other commands to read.

It gives later AI assistants a shared source of business and writing context instead of making them guess or produce generic work.

build-my-brain — Command for Claude Code by danielpaulai

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.

Clone the repo

git clone --depth 1 https://github.com/danielpaulai/Purely-Personal-Run-a-business-by-itself

Made for: Claude Code.

Or install purely-personal, the plugin that ships this one along with the rest of its 4 skills, 9 commands, 1 plugin.

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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain/github.svg)](https://agentmods.dev/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain)

Your own site

<a href="https://agentmods.dev/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain"><img src="https://agentmods.dev/badge/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain"><img src="https://agentmods.dev/badge/commands/danielpaulai/purely-personal-run-a-business-by-itself/build-my-brain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,668 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00037	$0.01668
Opus 5	$0.00018	$0.00834
Sonnet 5	$0.00007	$0.00334
Haiku 4.5	$0.00004	$0.00167

Measured 12d ago against content hash f47f96cd21b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

build-my-brain 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 12d 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.

commands/build-my-brain.md · 205 lines

How it starts

The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/build-my-brain

You are running the 4-act Business Brain intake. Your job is to produce a filled BUSINESS-BRAIN.md at the project root in under 40 minutes. Most of that time is automation — the user only answers 5 strategic questions.

Load purely-personal/examples/BUSINESS-BRAIN.sample.md as the structural reference for the output file.

Opening (30 seconds)

Say this, verbatim:

"We're going to build your Business Brain. This is the one file every AI executive reads before acting. Four acts, four wow moments. Ready?"

Wait for "yes" or equivalent.

Act 1 — Voice (5 minutes)

Say:

"Act 1. Paste your LinkedIn profile URL."

Once they paste:

Use apify-linkedin (if installed) OR apify--linkedin-profile-scraper to pull:
- Profile headline, about, experience, headshot URL
- Last 30 posts (content + engagement)
Run voice-extractor skill on the scraped posts. Extract:
- 3–5 banned phrases (observed absences — phrases that DON'T appear)
- 5 hook patterns (first-line openings repeated across posts)
- 3 example post excerpts (first 2–3 sentences)
- Tone description (1–2 sentences)
Run linkedin-profile-optimizer to generate a profile score (out of 100).
Display results to user:

✓ Pulled profile + 30 posts
✓ Voice rules extracted: [N banned phrases, N hook patterns]
✓ Profile score: {score}/100

Ask: "Anything to add or remove before I save?"
On confirmation, write Voice section to BUSINESS-BRAIN.md.

Wow moment: "Wait, that's exactly how I write."

Act 2 — Business (5 minutes)

Say:

"Act 2. Paste your website URL."

Once they paste:

Use apify--website-content-crawler to pull the homepage + pricing page (if found).
Extract:
- Offer statement (one line)
- Positioning (one sentence)
- Pricing (price points)
- Key claims / social proof
Run brand-identity-extractor on the same URL. Extract:
- 4–8 colors (dominant, excluding pure #ffffff and #000000)
- Display font + body font (from CSS inspection)
- Visual voice description (1 sentence, auto-generated from observed patterns)

Read the full file on GitHub · 205 lines

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.

12d ago First seen · 205 lines · 37 tokens per session scan A f47f96cd21b8

Subscribe to this mod's changes

build-my-brain is a command published in the GitHub repository danielpaulai/Purely-Personal-Run-a-business-by-itself (2 stars, last pushed 29d ago), licensed MIT. It adds 37 tokens to every session and 1,668 once invoked, about $0.0002 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.

Marketing and SEO Research

build-my-brain

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

/build-my-brain

Opening (30 seconds)

Act 1 — Voice (5 minutes)

Act 2 — Business (5 minutes)

What this file has done since we first saw it

Other commands, from other repositories

checklist

clarify

specify

converge

implement

analyze