founder-os-init

founder-os-init is a skill for Claude Code, Codex from msolecki/founder-os. It costs 28 tokens per session (4,992 once invoked), scanned A, original, MIT.

A first-install onboarding process for Founder OS, a workspace system for running a founder's business. It interviews the founder, creates the workspace, and routes answers to the responsible agents.

In plain words
What is it for?
Use it after installation or when the workspace location changes; do not use it to refresh an already activated workspace.
Why use it?
It provides a controlled path from installation to a saved daily brief and can resume after an interrupted setup.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md.

Part of the founder-os plugin — 57 skills, 13 agents, 4 hooks, 1 MCP server shipped together

Good fit Use it after installation or when the workspace location changes; do not use it to refresh an already activated workspace.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/msolecki/founder-os/founder-os-init
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 msolecki/founder-os --skill founder-os-init
Clone the repo
git clone --depth 1 https://github.com/msolecki/founder-os

Made for: Claude Code, Codex.

Or install founder-os, the plugin that ships this one along with the rest of its 57 skills, 13 agents, 4 hooks, 1 MCP server.

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 founder-os-init

README.md
[![agentmods](https://agentmods.dev/badge/skills/msolecki/founder-os/founder-os-init.svg)](https://agentmods.dev/skills/msolecki/founder-os/founder-os-init)
Your own site
<a href="https://agentmods.dev/skills/msolecki/founder-os/founder-os-init"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/founder-os-init.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,992 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 $0.00028 $0.04992
Opus 5 $0.00014 $0.02496
Sonnet 5 $0.00006 $0.00998
Haiku 4.5 $0.00003 $0.00499

Measured 7d ago against content hash 8b03f48c7945, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

founder-os-init 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 7d 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.

founder-os/skills/founder-os-init/SKILL.md · 381 lines

How it starts

The opening of the file, as written. The whole thing — 381 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Founder OS Init

This is the one resumable path from an installed package to a useful first daily brief. It runs as the Chief of Staff. It orchestrates the owner agents; it does not borrow their files or call a scaffold an activation.

Activation exists only when a valid brief has been persisted at reviews/daily/YYYY-MM-DD.md in the workspace resolved at preflight. Until then the workspace is incomplete and the next /founder-os-init continues it.

When to use

Run immediately after install, after moving FOUNDER_OS_HOME, or to resume an interrupted first run. Do not use it to refresh an activated workspace; that is /founder-os-doctor.

Start with Stage 0. Do not ask whether the founder is ready and do not mutate a workspace before preflight succeeds.

Inputs

  • references/ownership.yaml — the only source for scaffold paths, headings and owners.
  • references/multi-business.md and ~/.founder-os/businesses.yaml, when the registry exists.
  • $FOUNDER_OS_HOME, default ./founder-os/.
  • the canonical Founder OS context injected into this session;
  • existing workspace files and reviews/daily/, read before any question.

Shared sibling request

Every owner transition returns one request to the main thread with exactly role, workflow, workspace_id, correlation_id, handoff, and expected_persistence. It carries one bounded handoff of at most 4096 UTF-8 bytes. The main thread passes that carried answer unchanged; it validates and executes the request, while this workflow does not execute another role. Native and generic execution both use the byte-identical packaged role under references/orchestration.md.

Stage 0 — Preflight

Stage 0 is read-only. Finish every check before the first workspace write:

  1. Confirm the plugin manifest, CLAUDE.md, references/house-rules.md, references/ownership.yaml, references/multi-business.md and every downstream skill named below exist in the installed package.
  2. Before normal target resolution, read an explicit resume tuple from the invocation when one was supplied. It is complete only when it names the exact recorded FOUNDER_OS_HOME, business slug and resolved workspace path; a partial tuple stops instead of being guessed.
  3. Resolve the target using the resume-resolution table below. Treat the resulting path, FOUNDER_OS_HOME and business slug as one frozen resolved workspace tuple for the entire run.
  4. Validate the registry without rewriting it. A second-business request follows references/multi-business.md; an ambiguous or invalid slug stops.
  5. Check from filesystem metadata that the target or its nearest existing parent is writable. Do not create a probe file.
  6. Confirm the canonical context is present and carries CLAUDE.md, the house rules, ownership map and resolved workspace.
  7. Apply the daily-review validity invariant: in this resolved workspace, a candidate reviews/daily/YYYY-MM-DD.md is valid only when it contains the headings declared for reviews/daily/ by references/ownership.yaml, with a non-empty ## The one thing and ## The trade. Stage 6 uses this exact invariant again; there is no weaker activation check.
  8. If the selected workspace's decisions/*-founder-os-installed.md already carries a target checkpoint, compare its FOUNDER_OS_HOME, business slug and resolved path with the selected tuple. Any mismatch outside the confirmed-relocation case stops before a read or write outside the selected workspace.
  9. Read the target's charter.md, owned outputs and reviews/daily/, then classify exactly one activation state:

Read the full file on GitHub · 381 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. 7d ago First seen · 381 lines · 28 tokens per session scan A 8b03f48c7945

Subscribe to this mod's changes

founder-os-init is a skill published in the GitHub repository msolecki/founder-os (4 stars, last pushed 4d ago), licensed MIT. It adds 28 tokens to every session and 4,992 once invoked, about $0.0001 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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