LifeOS is an AI-assisted personal operating system that records a person’s goals, values, context, and current situation to help move them toward a desired future state. It supports work such as building applications, starting businesses, and creative projects. Its catalogue entries extend the system through skills, hooks, agents, and commands.
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.
npx skills add danielmiessler/LifeOS --skill explaingit clone --depth 1 https://github.com/danielmiessler/LifeOSWrote 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.
[](https://agentmods.dev/skills/danielmiessler/lifeos/explain)<a href="https://agentmods.dev/skills/danielmiessler/lifeos/explain"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/explain/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.
<a href="https://agentmods.dev/skills/danielmiessler/lifeos/explain"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/explain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.01097 |
| Opus 5.5 | $0.00000 | $0.00439 |
| Sonnet 5.5 | $0.00000 | $0.00219 |
| Haiku 4.5 | $0.00000 | $0.00110 |
Grade A, and why
Explain 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Explain
Keeps the principal up on the fundamentals of what is going on across the principal's projects, work and technical infrastructure, deeply and thoroughly. The principal lives inside many systems at once and cannot hold all of them in mind, so this skill teaches the topic in front of them, explains the parts of any area that it cannot lose, and quizzes the principal so gaps show up before they cost anything. It absorbed the Teach skill on 2026-10-16, when the principal asked for these intents and for any existing teaching skill to be merged in rather than duplicated.
Ideal State
- The principal leaves each session able to explain or apply the material, shown by the principal's own answers, not by how much was printed.
- What he is told about a project, area or piece of infra is true of it today: read this session from the live source, never recalled.
- Over time the skill knows where his understanding is thin, because every quiz answer is on the record, and each new quiz goes after the misses and whatever changed since he was last tested.
Intent Routing
| Intent | Trigger | File |
|---|---|---|
| Teach | "teach me", "/tm", "/teach-me", "tutorial", "quiz me" on what we just covered | Intents/Teach.md |
| ExplainFundamentals | "/ef", "explain the fundamentals of", "catch me up on", "how does X actually work" | Intents/ExplainFundamentals.md |
| QuizFundamentals | "/qf", "quiz me on the fundamentals of", "test what I know about", "am I still current on" | Intents/QuizFundamentals.md |
| File | Read when |
|---|---|
Setup.md |
first-time setup: the voice server and Fish key the spoken narration needs, and a read-only check |
Teach works on the conversation topic as a spoken dialogue. ExplainFundamentals and QuizFundamentals work on a standing area (a project, a work stream, a system) whether or not we touched it this session, and share one set of fundamentals per area so the quiz tests what the explanation taught.
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.
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.
- yesterday First seen · 67 lines · 0 tokens per session scan A b6f22e986263
Explain is a skill published in the GitHub repository danielmiessler/LifeOS (19,631 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,097 tokens. 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 2026-10-28.
Other skills, from other repositories
founder-coach
Personal leadership development for founders and first-time CEOs. Covers founder archetype identification, delegation frameworks, energy management, CEO calendar audits, leadership style evolution, blind spot identification, imposter syndrome, founder mental health, and succession planning. Use when a founder feels…
cs-onboard
Founder onboarding interview that captures company context across 7 dimensions. Invoke with /cs-onboard setup for initial interview or /cs-onboard update for quarterly refresh. Generates /.claude/company-context.md used by all C-suite advisor skills. Use when setting up the C-suite advisors for the first time, or when…
subscription-setup
A setup workflow for creating recurring medical-learning subscriptions after a doctor’s profile has been registered.
study-plan
Build a weekly and daily study schedule from the goal and the available time, with method notes and adjustment rules, delivered as an Excel workbook.
scaffold-exercises
A directory scaffold for course exercises, with sections, exercise folders, and optional problem, solution, or explanation versions. It creates the required Markdown files and checks the result with the repository's linter.
model-prompt-pack
Use when asked to write prompts for image-to-3D or text-to-3D tools, generate 3D models of a topic's parts, plan the assets for a 3D explorer, or build a labelled parts list with sources. Produces prompts for image-to-3D tools, one per object, plus a parts list for labelling in which every label names a trusted…