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Layers And Ownership

Layers And Ownership is a skill for Claude Code, Codex from binary16labs/prime-silo. It costs 33 tokens per session (688 once invoked), scanned A, a copy of Layers And Ownership, MIT.

A guide to deciding where frontend files belong across three ownership layers: built-in code, group customizations, and user customizations.

In plain words
What is it for?
Use it when adding or overriding frontend assets, handling shared or admin group content, storing user metadata and login records, or managing writable layer history and rollback.
Why use it?
It prevents files or overrides from being stored in the wrong place and explains which users may read or change them and which layer takes priority.

Skill for Claude CodeCodex

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

not rated 5repo today A scan 33 tokens copy · 100% MIT

Good fit Use it when adding or overriding frontend assets, handling shared or admin group content, storing user metadata and login records, or managing writable layer history and rollback.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/binary16labs/prime-silo/layers-ownership
View source ↗ binary16labs/prime-silo binary16labs.github.io
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 binary16labs/prime-silo --skill layers-ownership
Clone the repo
git clone --depth 1 https://github.com/binary16labs/prime-silo

Made for: Claude Code, Codex.

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 Layers And Ownership

README.md
[![agentmods](https://agentmods.dev/badge/skills/binary16labs/prime-silo/layers-ownership.svg)](https://agentmods.dev/skills/binary16labs/prime-silo/layers-ownership)
Your own site
<a href="https://agentmods.dev/skills/binary16labs/prime-silo/layers-ownership"><img src="https://agentmods.dev/badge/skills/binary16labs/prime-silo/layers-ownership.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 688 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 100% 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 $0.00033 $0.00688
Opus 5 $0.00016 $0.00344
Sonnet 5 $0.00007 $0.00138
Haiku 4.5 $0.00003 $0.00069

Measured 7d ago against content hash e12c8cc0f2f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

Layers And Ownership 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 7d 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

100% identical to Layers And Ownership — 0 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.

app/L0/_all/mod/_core/skillset/ext/skills/development/layers-ownership/SKILL.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Use this skill before deciding where new files belong or how readable and writable content resolves across users and groups.

The Three Layers

  • L0 is firmware. Repo-owned first-party code belongs here.
  • L1 is group customware. It is writable only for group managers and admins.
  • L2 is user customware. It is writable only for that user and admins.

Group And User Structure

  • L1/_all is the shared group layer available to everyone.
  • L1/_admin is the admin group layer.
  • L2/<username>/user.yaml stores user metadata such as full_name.
  • L2/<username>/meta/ holds auth state such as password and login session records.
  • L2/<username>/mod/ is that user's customware module root.
  • L1/<group>/group.yaml is the canonical group membership and management file.
  • When CUSTOMWARE_GIT_HISTORY is enabled, each writable L1/<group>/ and L2/<username>/ root may have a server-managed local Git history repository.
  • L2 history ignores meta/password.json and meta/logins.json; rollback preserves those current auth files and keeps previous heads listable for forward travel when possible, while revert creates a new inverse commit.

Permission Model

  • Nobody writes L0.
  • Users may read their own L2/<username>/.
  • Users may read L0/<group>/ and L1/<group>/ for groups they belong to.
  • Users may write L1/<group>/ only when they manage that group directly or through a managing-group include chain.
  • _admin members may write any L1/ and L2/ path.

Group Config Fields

group.yaml uses these canonical fields:

  • included_users
  • included_groups
  • managing_users
  • managing_groups

Resolution Order

Readable module and extension resolution is rank-based:

  1. L0/_all
  2. readable L0/<group> entries in group order
  3. L1/_all
  4. readable L1/<group> entries in group order
  5. L2/<username>

Higher-ranked exact same module-relative paths override lower-ranked ones. Different filenames under the same extension point compose together.

Read the full file on GitHub · 64 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. 7d ago First seen · 64 lines · 33 tokens per session scan A e12c8cc0f2f0

Subscribe to this mod's changes

Layers And Ownership is a skill published in the GitHub repository binary16labs/prime-silo (5 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 688 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to Layers And Ownership, differing in 0 lines, and is treated as a copy.

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