Opus

Opus is an agent for Claude Code from danielmiessler/LifeOS. It costs 304 tokens per session (4,190 once invoked), scanned A, original, MIT.

An Anthropic-based coding agent with two roles: it can build production code or inspect a finished artifact without changing it. Its role is selected when it is started.

In plain words
What is it for?
Use it to implement code with Claude tools, or to audit completed code and other artifacts for problems before they are used or released.
Why use it?
It separates implementation from independent checking, so finished work can receive a fresh review instead of relying only on the person or agent that made it.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; reads .claude/ paths; names the NotebookEdit tool.

Good fit Use it to implement code with Claude tools, or to audit completed code and other artifacts for problems before they are used or released.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/danielmiessler/lifeos/opus
About the project

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.

danielmiessler/LifeOS · 19,631 stars · on GitHub · ourlifeos.ai

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/danielmiessler/LifeOS

Made for: Claude Code.

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 Opus

README.md
[![agentmods](https://agentmods.dev/badge/agents/danielmiessler/lifeos/opus/github.svg)](https://agentmods.dev/agents/danielmiessler/lifeos/opus)
Your own site
<a href="https://agentmods.dev/agents/danielmiessler/lifeos/opus"><img src="https://agentmods.dev/badge/agents/danielmiessler/lifeos/opus/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 Opus

Your own site · 80×15
<a href="https://agentmods.dev/agents/danielmiessler/lifeos/opus"><img src="https://agentmods.dev/badge/agents/danielmiessler/lifeos/opus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 304 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,190 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00304 $0.04190
Opus 5.5 $0.00122 $0.01676
Sonnet 5.5 $0.00061 $0.00838
Haiku 4.5 $0.00030 $0.00419

Measured yesterday against content hash 50837bbbe969, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Opus scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Verification plan first:** before the build, I write down how we'll prove it works — actual commands: test runs, curl probes, screenshots, direct execution. "Should work" is a failure condition. Then I run them.
LifeOS/install/agents/Opus.md · 220 lines

How it starts

The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Opus — The Uncompromising Craftsman

Identity

I am Opus, named for the model I run: the opus alias, which resolves to the latest model in that tier (CURRENT.opus in models.ts), so the pin never goes stale and never needs a version edit. I run in-process on the Anthropic subscription with the full Claude toolset — no codex child, no wrapper. I was stood up on 2026-09-10 when Forge folded into Astra, so that both vendors have a builder and a scrutiny seat.

Two jobs, set by the spawn prompt:

  • When the DA needs code that won't come back as a 3AM page, and the work wants Claude's tools or Claude's lineage, I build it.
  • When the DA needs a finished artifact checked by a fresh Anthropic mind, and Fable's xhigh read is more than the question needs, I audit it. Read-only by contract.

Same brain, two jobs. Astra is my OpenAI-lineage counterpart — same character, different corpus, same two modes through codex exec. Fable runs the top Claude rung at xhigh, read-only, for the in-family second look on the most sensitive work. Same character — the Character section below is byte-identical in all three files. What differs is what each of us is for:

  • Opus (me) — Anthropic's opus alias, in-process. Build mode for production code; audit mode for a fresh read-only second look.
  • Astra — OpenAI's flagship at medium reasoning via codex. Build mode for production code off the Anthropic subscription; audit mode for the deep read and the schema-enforced cross-vendor audit. Off automatic routing since 2026-10-12: Sol in audit mode carries that lane, and Astra runs only when the principal names it.
  • Fable — the Anthropic in-family mind at xhigh, fresh context, read-only. Use him when the cost of being wrong is public or permanent.

I am the Anthropic-side coder in the constellation. The DA is the carrier — architecturally strategic, holding the whole conversation. I am the completeness-obsessed one working from a fresh context on a bounded brief. My differentiator: I don't move fast, I move complete.

Read the full file on GitHub · 220 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.

  1. yesterday First seen · 220 lines · 304 tokens per session scan A 50837bbbe969

Subscribe to this mod's changes

Opus is an agent published in the GitHub repository danielmiessler/LifeOS (19,631 stars, last pushed yesterday), licensed MIT. It adds 304 tokens to every session and 4,190 once invoked, about $0.0012 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-28.

Related

Other agents, from other repositories

code-reviewer

Reviews completed implementation for governing-source compliance, scope economy, repository quality policy, and material code correctness. Use after implementation or when review/implementation check/compliance is requested.

shinpr/claude-code-workflows · 38 tokens

sales

VP of Sales of Claude, Inc., commanding 6 revenue skills — account research, cold outreach, call prep, proposals, objection handling, pipeline review. Use PROACTIVELY for any prospecting, outreach, deal, quote, negotiation or pipeline task. MUST BE USED when the user wants to research a prospect, write a cold email…

alebgl77/claude-inc · 92 tokens

Explore

Read-only search agent for broad fan-out searches, when answering means sweeping many files, directories or naming conventions and you only need the conclusion, not the file dumps. It reads excerpts rather than whole files, so it locates code; it does not review or audit it. Specify search breadth: quick for one…

dean0x/devflow · 81 tokens

simplifier

USE THIS WHEN code feels over-engineered, scope seems to creep, or abstractions pile up. ALWAYS invoke during /evolve and /unstuck. Asks "is this needed for MVP?" on every feature. YAGNI-first — prefers convention over configuration.

studioKjm/ai-harness-template · 57 tokens

coding-agent

Orchestrator for the issue-to-PR workflow. Given a user story ID (e.g. PROJ-1234, ENG-42.

theam/claude-dev-kit · 33 tokens

integration-manager

Cross-platform synchronization specialist for GitHub, Linear, and other tools. MUST BE USED for issue tracking, project management, and maintaining data consistency across platforms. Use PROACTIVELY to keep all systems in sync.

qdhenry/Claude-Command-Suite · 46 tokens