loadout-system-design

loadout-system-design is a skill for Claude Code from JOndarza/loadout. It costs 132 tokens per session (1,022 once invoked), scanned A, original, MIT.

A system-design reference for Loadout, a VS Code extension with a graphical panel for managing Claude Code agents, skills, and commands.

In plain words
What is it for?
Use it when building or changing Loadout's extension host, Angular webview, data storage, message handling, build process, or interface.
Why use it?
It gives implementation work a shared set of architecture, messaging, storage, security, coding, and visual-design rules to follow.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Claude Code.

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/jondarza/loadout/loadout-system-design
Any agent
npx skills add JOndarza/loadout --skill loadout-system-design
Clone the repo
git clone --depth 1 https://github.com/JOndarza/loadout

Made for: Claude Code.

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 loadout-system-design

README.md
[![agentmods](https://agentmods.dev/badge/skills/jondarza/loadout/loadout-system-design.svg)](https://agentmods.dev/skills/jondarza/loadout/loadout-system-design)
Your own site
<a href="https://agentmods.dev/skills/jondarza/loadout/loadout-system-design"><img src="https://agentmods.dev/badge/skills/jondarza/loadout/loadout-system-design.svg" alt="Measured on agentmods" height="20"></a>
Per session 132 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,022 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00132 $0.01022
Opus 5 $0.00066 $0.00511
Sonnet 5 $0.00026 $0.00204
Haiku 4.5 $0.00013 $0.00102

Measured 6d ago against content hash 6d1bf3ecbd52, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

loadout-system-design 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 6d 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.

.claude/skills/loadout-system-design/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Loadout — System Design Reference

Quick Navigation

What you need Load
Two-process overview, file map, state flow, build pipeline references/architecture.md
Extension entry, src/ modules, data.js API, security model references/extension-host.md
Angular 21, state services, DataSyncService, shared primitives references/webview-angular.md
Full message catalogue (WebviewMessage + ExtensionMessage types) references/messaging-protocol.md
Domain types, storage paths, profiles, hash/sync mechanics references/domain-storage.md
File size limits, CommonJS rules, Angular rules, git, formatting references/coding-rules.md
Design tokens, color palettes, SCSS mixins, animations, a11y references/ui-design-system.md

Non-negotiable invariants

These apply everywhere, always — no exceptions.

  1. No VSCode API in webview — never import vscode or use fs/path/os from any file under webview/.
  2. All filesystem mutations go through data.js — no ad-hoc fs.writeFileSync in src/ modules.
  3. Every Angular component: standalone: true + ChangeDetectionStrategy.OnPush — no exceptions.
  4. State in core/state/*.state.ts signal services only — components are dumb views; no component-local mutable state for domain data.
  5. Signals for state, RxJS only for the bridge stream — no BehaviorSubject / ReplaySubject for state.
  6. File size cap ~400 lines — split into a new src/ module or Angular subcomponent when approaching this.
  7. Profiles store filenames only — never copy file content into profiles.json.
  8. Icons: lucide-angular only — no SVG file imports, no inline <svg>.
  9. CommonJS in extension hostrequire() / module.exports in all .js root files; update-claude.mjs is the sole ESM exception.
  10. Build webview-dist/ before committing UI changes — run cd webview && npm run build.

Read the full file on GitHub · 60 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 60 lines · 132 tokens per session scan A 6d1bf3ecbd52

Subscribe to this mod's changes

loadout-system-design is a skill published in the GitHub repository JOndarza/loadout (2 stars, last pushed 4mo ago), licensed MIT. It adds 132 tokens to every session and 1,022 once invoked, about $0.0007 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 2026-08-31.

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