repo-architecture

repo-architecture is a skill for Claude Code, Codex from cynthiajones34/GBrain. It costs 34 tokens per session (419 once invoked), scanned A, a copy of repo-architecture, MIT.

A set of rules for deciding where new pages belong in a brain repository. The page is filed by its main subject, such as a person, company, meeting, concept, or source.

In plain words
What is it for?
Use it when creating or filing brain pages, especially when a page could fit in several directories.
Why use it?
It prevents pages from being misplaced just because of their file format or where they came from. It also encourages links to related pages and checks whether a new page is worthwhile.

Skill for Claude CodeCodex

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

Good fit Use it when creating or filing brain pages, especially when a page could fit in several directories.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cynthiajones34/gbrain/repo-architecture
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 cynthiajones34/GBrain --skill repo-architecture
Clone the repo
git clone --depth 1 https://github.com/cynthiajones34/GBrain

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 repo-architecture

README.md
[![agentmods](https://agentmods.dev/badge/skills/cynthiajones34/gbrain/repo-architecture/github.svg)](https://agentmods.dev/skills/cynthiajones34/gbrain/repo-architecture)
Your own site
<a href="https://agentmods.dev/skills/cynthiajones34/gbrain/repo-architecture"><img src="https://agentmods.dev/badge/skills/cynthiajones34/gbrain/repo-architecture/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 repo-architecture

Your own site · 80×15
<a href="https://agentmods.dev/skills/cynthiajones34/gbrain/repo-architecture"><img src="https://agentmods.dev/badge/skills/cynthiajones34/gbrain/repo-architecture.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 419 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 $0.00034 $0.00419
Opus 5 $0.00017 $0.00210
Sonnet 5 $0.00007 $0.00084
Haiku 4.5 $0.00003 $0.00042

Measured 10d ago against content hash 4ec2b8f45d16, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

repo-architecture 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 10d 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 repo-architecture — 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.

skills/repo-architecture/SKILL.md · 54 lines

What it actually says

Repo Architecture — Filing Rules

Full filing rules: See skills/_brain-filing-rules.md

Contract

This skill guarantees:

  • Every new page is filed by primary subject (not format, not source)
  • The decision protocol is followed for ambiguous cases
  • Common misfiling patterns are caught

Phases

  1. Identify the primary subject. What would you search for to find this page?
  2. Walk the decision tree:
    • About a person → people/{name-slug}.md
    • About a company → companies/{name-slug}.md
    • A reusable concept/framework → concepts/{slug}.md
    • An original idea → originals/{slug}.md
    • A meeting → meetings/{slug}.md
    • Media content → media/{type}/{slug}.md
    • Raw data import → sources/{slug}.md
  3. Cross-link. Link from related directories.
  4. Check notability. See skills/conventions/quality.md notability gate.

Output Format

Advisory: "File this at {type}/{slug}.md because the primary subject is {reason}."

Anti-Patterns

  • Filing by format ("it's a PDF so it goes in sources/")
  • Filing by source ("it came from email so it goes in sources/")
  • Creating pages without checking if one already exists
  • Using sources/ for anything except raw data dumps
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. 10d ago First seen · 54 lines · 34 tokens per session scan A 4ec2b8f45d16

Subscribe to this mod's changes

repo-architecture is a skill published in the GitHub repository cynthiajones34/GBrain (0 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 419 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 repo-architecture, differing in 0 lines, and is treated as a copy.