bob-brain

bob-brain is a skill for Claude Code from ikarisz/Bobby-Need-To-Billionaire. It costs 124 tokens per session (2,054 once invoked), scanned A, original, MIT.

A written decision-making system for difficult or expensive choices, with a folder called Bob-brain where analyses, beliefs, predictions, decisions, and mistakes are saved as Markdown notes. It spends more thought on one-way decisions—choices that are hard or costly to undo—than on easy-to-reverse choices.

In plain words
What is it for?
Use it when choosing, killing, or changing a venture, setting prices, deciding who the buyer is, spending money, committing significant time, making public statements, or making legally binding choices.
Why use it?
Important reasoning can be forgotten or contradicted across sessions. Recording it creates an auditable history and helps keep later decisions consistent.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the founder plugin — 7 skills shipped together

Good fit Use it when choosing, killing, or changing a venture, setting prices, deciding who the buyer is, spending money, committing significant time, making public statements, or making legally binding choices.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ikarisz/bobby-need-to-billionaire/bob-brain
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.

Any agent
npx skills add ikarisz/Bobby-Need-To-Billionaire --skill bob-brain
Clone the repo
git clone --depth 1 https://github.com/ikarisz/Bobby-Need-To-Billionaire

Made for: Claude Code.

Or install founder, the plugin that ships this one along with the rest of its 7 skills.

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 bob-brain

README.md
[![agentmods](https://agentmods.dev/badge/skills/ikarisz/bobby-need-to-billionaire/bob-brain/github.svg)](https://agentmods.dev/skills/ikarisz/bobby-need-to-billionaire/bob-brain)
Your own site
<a href="https://agentmods.dev/skills/ikarisz/bobby-need-to-billionaire/bob-brain"><img src="https://agentmods.dev/badge/skills/ikarisz/bobby-need-to-billionaire/bob-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.

agentmods 80×15 button for bob-brain

Your own site · 80×15
<a href="https://agentmods.dev/skills/ikarisz/bobby-need-to-billionaire/bob-brain"><img src="https://agentmods.dev/badge/skills/ikarisz/bobby-need-to-billionaire/bob-brain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 124 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,054 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00124 $0.02054
Opus 5 $0.00062 $0.01027
Sonnet 5 $0.00025 $0.00411
Haiku 4.5 $0.00012 $0.00205

Measured 12d ago against content hash 94b2c6240ebf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bob-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.

The scan reads SKILL.md. This mod also ships 1 executable file (tools/scaffold-bob-brain.mjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/bob-brain/SKILL.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

BOB-BRAIN — think until it hurts, then write down why

Bob's mother does not have time for a founder who guesses, and does not have time for a founder who deliberates over reversible things. So Bob's thinking is not uniformly deep — it is violently unequal. Almost nothing gets ceremony. A handful of decisions get everything he has.

And every one of those goes on disk. A conclusion nobody can audit is a conclusion Bob will contradict in three weeks without noticing. Bob-brain/ is how he stays the same person across sessions. Read ../founder/references/who-is-bob.md if you don't yet know whose brain this is.

The two doors (this decides how much you think)

One-way doors — expensive or impossible to undo. Think exhaustively. Burn the tokens. Write the record.

  • Which venture to commit to · killing a venture · pivoting
  • Pricing and the pricing model · who the buyer is
  • Anything spending the operator's money or more than 5 of their hours
  • Anything public in the operator's name · anything legally binding
  • Anything touching ../guerrilla-growth/references/the-line.md

Two-way doors — cheap to undo. Decide in one line and move. Copy, layout, which feature first, which of three groups to post in, what to build tonight. Deliberating over a two-way door is not rigour; it is a way of avoiding the one-way door you're afraid of.

The test: if this is wrong, can we be back where we started inside a week for under ฿5,000? Then it's a two-way door. Stop thinking and ship it.

The deep-think protocol (one-way doors only — full detail in references/thinking-protocol.md)

Run all nine passes. Do not skip pass 4 or pass 6; they are the two that change answers.

  1. Restate the real question. The asked question is usually a symptom. Write the question you're actually answering, in one sentence, and say what changes depending on the answer.
  2. Split facts from assumptions. Every input gets a tag: [FACT +url], [ASSUMPTION, confidence N%], [GUESS]. Anything load-bearing and untagged is a lie you're telling yourself.
  3. Generate at least five options — mandatory inclusions: do nothing, do the opposite, and the option that embarrasses us. Three options means you already decided and are decorating it.
  4. Steelman then kill each one. Best possible case for every option, then the single number or fact that kills it. An option you couldn't argue for was never a real option.
  5. Do the arithmetic. Expected value with explicit probabilities, cost, and time. Written out, not implied. If you can't put numbers on it, say so out loud and mark the decision as judgement-based.
  6. Premortem. It is 90 days later and this decision destroyed the venture. Write the story of how — specifically, with the dates and the numbers. Then ask what could be done today for near-zero cost to prevent that exact story.
  7. Second-order effects. And then what? What does this make impossible later, what does it commit us to, who does it annoy, and what does it teach a competitor?
  8. Find the cheapest thing that would change your mind. If nothing could change it, it is faith, not analysis — label it. Usually there is a ฿0, two-day test that beats all of this deliberation, and finding it is the highest-value output of the whole protocol.
  9. Decide. State the choice, the confidence, what would make it wrong, the reversibility, and the date it gets reviewed. Then write the record and act the same day.

Read the full file on GitHub · 92 lines

Files

What ships with it

4 files 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. 12d ago First seen · 92 lines · 0 tokens per session scan A 94b2c6240ebf

Subscribe to this mod's changes

bob-brain is a skill published in the GitHub repository ikarisz/Bobby-Need-To-Billionaire (2 stars, last pushed 17d ago), licensed MIT. It adds 124 tokens to every session and 2,054 once invoked, about $0.0006 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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