define

define is a command for Claude Code from nyldn/claude-octopus. It costs 13 tokens per session (934 once invoked), scanned A, a copy of octo-define, MIT.

A problem-definition workflow that uses multiple AI systems to clarify and scope work.

In plain words
What is it for?
Use it to define requirements, narrow project boundaries, and build agreement about what should be done.
Why use it?
It turns an unclear request into a more specific problem and shared scope.

Command for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: names the AskUserQuestion tool; mentions Codex.

Part of the octo plugin — 70 skills, 106 commands, 10 agents, 18 hooks shipped together

Good fit Use it to define requirements, narrow project boundaries, and build agreement about what should be done.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/nyldn/claude-octopus/define
About the project

Claude Octopus is an orchestration project that sends research, design, and coding tasks to Claude Code and other AI model providers so their results can be compared. Developers use it for multi-model work, disagreement detection, reviews, persistent context, and an optional workflow that moves from discovery through delivery. The catalogue entries are its commands, skills, agents, instructions, hooks, plugins, and settings.

nyldn/claude-octopus · 4,061 stars · on GitHub · reddit.com

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/nyldn/claude-octopus

Made for: Claude Code.

Or install octo, the plugin that ships this one along with the rest of its 70 skills, 106 commands, 10 agents, 18 hooks.

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 define

README.md
[![agentmods](https://agentmods.dev/badge/commands/nyldn/claude-octopus/define/github.svg)](https://agentmods.dev/commands/nyldn/claude-octopus/define)
Your own site
<a href="https://agentmods.dev/commands/nyldn/claude-octopus/define"><img src="https://agentmods.dev/badge/commands/nyldn/claude-octopus/define/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 define

Your own site · 80×15
<a href="https://agentmods.dev/commands/nyldn/claude-octopus/define"><img src="https://agentmods.dev/badge/commands/nyldn/claude-octopus/define.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 934 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 91% copy Near-identical to another mod 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 $0.00013 $0.00934
Opus 5 $0.00006 $0.00467
Sonnet 5 $0.00003 $0.00187
Haiku 4.5 $0.00001 $0.00093

Measured 3d ago against content hash f1e6b4165231, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

define 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 3d 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.

Origin

This is a copy

91% identical to octo-define — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

commands/define.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Define - Definition Phase 🎯

Load skills/blocks/engineering-method-selection.md from the installed plugin and apply only the methods relevant to this task. Preserve this entry point's execution contract and output format. Read referenced skills as instructions; do not invoke the current command recursively or add provider calls from a seat.

🤖 INSTRUCTIONS FOR CLAUDE

MANDATORY COMPLIANCE — DO NOT SKIP

When the user explicitly invokes /octo:define, you MUST execute the structured workflow below. You are PROHIBITED from doing the task directly, skipping the definition/scoping phase, or deciding the task is "too simple" for this workflow. The user chose this command deliberately — respect that choice.

EXECUTION MECHANISM — NON-NEGOTIABLE

You MUST execute this command by reading and following the corresponding workflow source. You are PROHIBITED from:

  • ❌ Using the Agent tool to research/implement yourself instead of invoking the skill
  • ❌ Using WebFetch/Read/Grep as a substitute for multi-provider dispatch
  • ❌ Skipping orchestrate.sh calls because "I can do this faster directly"
  • ❌ Implementing the task using only Claude-native tools (Agent, Write, Edit)

Multi-LLM orchestration is the purpose of this command. If you execute using only Claude, you've violated the command's contract.


When the user invokes this command (e.g., /octo:define <arguments>):

✓ CORRECT - Read the explicit workflow source:

Read ${HOME}/.claude-octopus/plugin/.claude/skills/flow-define/SKILL.md, then execute it with <user's arguments>

✗ INCORRECT:

Skill(skill: "flow-define", ...)  ❌ Wrong! Octopus skills are model-invocation disabled
Task(subagent_type: "octo:define", ...)  ❌ Wrong! This is a skill, not an agent type

Post-Completion — Interactive Next Steps

CRITICAL: After the skill completes, you MUST ask the user what to do next. Do NOT end the session silently.

AskUserQuestion({
  questions: [
    {
      question: "Definition phase complete. What would you like to do next?",
      header: "Next Steps",
      multiSelect: false,
      options: [
        {label: "Move to Develop phase", description: "Start building based on defined requirements (/octo:develop)"},
        {label: "Refine the definition", description: "Adjust scope or requirements"},
        {label: "Run the full workflow", description: "Continue through all remaining phases (/octo:embrace)"},
        {label: "Export the definition", description: "Save requirements as a document"},
        {label: "Done for now", description: "I have what I need"}
      ]
    }
  ]
})

Read the full file on GitHub · 116 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. 3d ago Changed · +5 lines f1e6b4165231
  2. 7d ago First seen · 111 lines · 13 tokens per session scan A 905ac5c95c53

Subscribe to this mod's changes

define is a command published in the GitHub repository nyldn/claude-octopus (4,061 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 934 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to octo-define, differing in 6 lines, and is treated as a copy.