prime

prime is a skill for Claude Code, Codex from saadshahd/moo.md. It costs 52 tokens per session (231 once invoked), scanned A, original, MIT.

A repository-aware guide that reads a project's taste rules before code is written or edited. These rules are stored as Markdown files in a `.claude/sound/` folder and apply to specific parts of the codebase.

In plain words
What is it for?
Use it at the start of coding tasks and whenever a change reaches an unplanned surface, such as a new component, file type, or interface.
Why use it?
It helps prevent changes that conflict with the project's established design and coding preferences. It also checks again when work expands to a new area.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Part of the sound plugin — 3 skills shipped together

Good fit Use it at the start of coding tasks and whenever a change reaches an unplanned surface, such as a new component, file type, or interface.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/saadshahd/moo.md/prime
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 saadshahd/moo.md --skill prime
Clone the repo
git clone --depth 1 https://github.com/saadshahd/moo.md

Made for: Claude Code, Codex.

Or install sound, the plugin that ships this one along with the rest of its 3 skills.

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 prime

README.md
[![agentmods](https://agentmods.dev/badge/skills/saadshahd/moo.md/prime.svg)](https://agentmods.dev/skills/saadshahd/moo.md/prime)
Your own site
<a href="https://agentmods.dev/skills/saadshahd/moo.md/prime"><img src="https://agentmods.dev/badge/skills/saadshahd/moo.md/prime.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 231 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 $0.00052 $0.00231
Opus 5 $0.00026 $0.00115
Sonnet 5 $0.00010 $0.00046
Haiku 4.5 $0.00005 $0.00023

Measured 8d ago against content hash 41631a6edaa0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

prime 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 8d 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.

sound/skills/prime/SKILL.md · 13 lines

What it actually says

sound:prime

If the repo has no .claude/sound/ directory, it carries no sound taste rules — do nothing.

Otherwise: the project's taste rules live under .claude/sound/, grouped into topic folders (<topic>/<rule-name>.md). Before you write, browse the tree to see which topics bear on the surfaces you'll touch. Read a rule's file when its situation comes up, and make sure your code meets every rule that governs a surface you change. If the work reaches a surface you had not planned to touch, browse the tree again for that surface before writing it.

When two rules pull opposite ways on one surface, check each rule's Not-when and Cross-ref first — most conflicts are already carved there. Where none applies, the rule protecting correctness or debuggability outranks the one protecting style.

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. 8d ago First seen · 13 lines · 52 tokens per session scan A 41631a6edaa0

Subscribe to this mod's changes

prime is a skill published in the GitHub repository saadshahd/moo.md (34 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 231 once invoked, about $0.0003 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 2026-08-30.

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