using-o9k

using-o9k is a skill for Claude Code from Bumblebiber/its-over-9k. It costs 90 tokens per session (1,361 once invoked), scanned B, original, MIT.

A set of instructions for the o9k framework, which coordinates rules about response style, project exploration, memory, planning, and task dispatch between coding-agent tools.

In plain words
What is it for?
Deciding how to start sessions, inspect a project, delegate work, manage shared context, and resolve conflicts between framework instructions.
Why use it?
It explains which part of the framework should handle a situation when several rules or tools could apply.

Skill for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

Part of the o9k-core plugin — 5 skills, 1 hook shipped together

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.

agentmods
npx agentmods add skills/bumblebiber/its-over-9k/using-o9k
Any agent
npx skills add Bumblebiber/its-over-9k --skill using-o9k
Clone the repo
git clone --depth 1 https://github.com/Bumblebiber/its-over-9k

Made for: Claude Code.

Or install o9k-core, the plugin that ships this one along with the rest of its 5 skills, 1 hook.

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 using-o9k

README.md
[![agentmods](https://agentmods.dev/badge/skills/bumblebiber/its-over-9k/using-o9k.svg)](https://agentmods.dev/skills/bumblebiber/its-over-9k/using-o9k)
Your own site
<a href="https://agentmods.dev/skills/bumblebiber/its-over-9k/using-o9k"><img src="https://agentmods.dev/badge/skills/bumblebiber/its-over-9k/using-o9k.svg" alt="Measured on agentmods" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,361 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00090 $0.01361
Opus 5 $0.00045 $0.00681
Sonnet 5 $0.00018 $0.00272
Haiku 4.5 $0.00009 $0.00136

Measured 5d ago against content hash 3e1012f3a5e4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

using-o9k scanned grade B 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 5d 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.

Strips warnings and disclaimersmediumAnti-refusal

Omitting safety caveats hides risk from the user and is a common jailbreak preamble.

When an arbitration needs a human decision (e.g. two dispatch owners), don't lecture — surface it once and point to `/o9k-guide`, which walks the user
plugins/o9k-core/skills/using-o9k/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

using-o9k — The Doctrine

You are running under the o9k efficiency framework. Its goal: maximize the fraction of your context window doing useful work. Every token you emit or load gets re-read on every subsequent turn — waste compounds.

o9k itself owns no efficiency feature. It is the connector: it decides which installed framework owns which concern, wires them into every host, and keeps them from colliding. Whether a given rule below applies depends on what the user opted into — read the table, not your memory of a default install.

What applies, and when

Situation Concern Owner (if installed)
Writing any response Output compression caveman (upstream project)
About to open/read/explore code Context discipline scout (o9k-scout)
A search, lookup, or decomposable task Subagent isolation dispatch path A (team-up)
External CLI worker (tmux / cross-CLI) Multi-agent roster team-up's dispatch path B — required once a roster exists
Session start, project questions, "what was the state?" Memory memory (o9k-memory)
Conflict between any of the above Arbitration this skill

A row whose owner is not installed simply does not apply. Do not emulate a missing pillar by hand, and do not tell the user they are missing one unless they ask.

Roster detection gate (run before any external CLI spawn):

command -v team-up && test -f ~/.team-up/roster.json
  • No roster → Path A only (in-host RESULT subagents).
  • Roster present → external CLI workers must use Path B: runs createteam-up dispatch --run-id → cheap in-host runs wait watcher. Bare tmux dispatch without mailbox + watcher = incomplete spawn — parent never gets notified. See dispatch § Incomplete-spawn gate.

Core rules (always on)

  1. Never load what you can look up later. Prefer an ID, a path, a one-line summary over the full content. Drill down only when the task demands it.
  2. Never repeat what's already in context. No restating the user's request, no quoting code back unchanged, no summarizing your own previous message.
  3. Output is future input. Everything you say now is context tax on every later turn. Say it once, say it short (see caveman).
  4. Isolate the noisy work. Broad searches, log dumps, doc reading — send a subagent (see dispatch path A); keep only the conclusion.
  5. External workers need a callback. When a team-up roster exists and you spawn an external CLI in tmux, Path B is mandatory — not a shortcut, not "when you remember." Three steps or the spawn is incomplete: runs create, dispatch --run-id, watcher on runs wait. Never report "running" to the human until the watcher exists.
  6. Persist before you lose it. Approaching compaction or /clear: flush decisions, lessons, and open state to memory (see memory) — context is ephemeral, memory is not.

Read the full file on GitHub · 93 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. 5d ago First seen · 93 lines · 90 tokens per session scan B 3e1012f3a5e4

Subscribe to this mod's changes

using-o9k is a skill published in the GitHub repository Bumblebiber/its-over-9k (0 stars, last pushed 8d ago), licensed MIT. It adds 90 tokens to every session and 1,361 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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