design-system-2-starter-kit: Instructions file for Codex

AGENTS.md

design-system-2-starter-kit AGENTS.md is an instructions file for Codex, OpenCode from salesforce-ux/design-system-2-starter-kit. It costs 1,518 tokens per session, scanned A, original, Apache-2.0.

A project instruction file for Salesforce's Design System 2 starter kit, a template for building Salesforce-style web interfaces.

In plain words
What is it for?
Use it when adding pages or features to the starter kit built with Lightning Web Components, Vite, and Salesforce's design system.
Why use it?
It tells agents where to place code and how to update routes, navigation, and interface components correctly.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is salesforce-ux/design-system-2-starter-kit's own configuration. It tells Codex and OpenCode how to work on design-system-2-starter-kit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything design-system-2-starter-kit configures →

Reuse

Borrowing it

Nothing to install: this file belongs to salesforce-ux/design-system-2-starter-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/salesforce-ux/design-system-2-starter-kit/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/salesforce-ux/design-system-2-starter-kit

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Per session 1,518 This file is loaded in full into every session.
When invoked 1,518 The same file — it is already loaded in full.
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 $0.01518 $0.01518
Opus 5 $0.00759 $0.00759
Sonnet 5 $0.00304 $0.00304
Haiku 4.5 $0.00152 $0.00152

Measured 8d ago against content hash 8b3eaaeed26d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

design-system-2-starter-kit AGENTS.md 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.

AGENTS.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent guidelines: Design System 2 Starter Kit

This repository is a starter template for prototyping Salesforce-aligned UIs locally. It uses LWC (Lightning Web Components), Vite, SLDS (Salesforce Lightning Design System), and lightning-base-components, with synthetic shadow DOM and client-side routing.


Project-specific guidance

Where to put code

  • Route-level views: src/modules/page/<name>/ → tag page-<name>. Add a route in src/routes.config.js, then import and register the component in src/modules/shell/app/app.js (ROUTE_COMPONENTS). The router picks up new routes automatically; src/router.js does not need editing.
  • New features and pages are primary by default: When the user requests a new feature or page, make it the primary navigation tab and initial landing page without asking for confirmation. Give it a navPage, place that id first in every applicable navigation app's pages list in src/apps.config.js, and set each applicable app's defaultPath to its app-prefixed route so it appears immediately on page load. Keep existing pages as secondary tabs unless the user explicitly requests different behavior. Apps without primary navigation, such as the Builder app, are exempt.
  • Reusable UI / SLDS blueprints: src/modules/ui/<name>/ → tag ui-<name>. Use inside pages, the shell, or other components.
  • App shell: src/modules/shell/<name>/ → tag shell-. Root app, layout, theme, docked panels — not route views (page-) and not reusable components (ui-*).
  • Do not add components under src/build/lightning-icon/shims/ except the checked-in icon overrides, or under src/modules/lightning/.

SLDS linter

After you change any .html or .css file, run the SLDS linter on each file you touched before considering the task complete:

npx @salesforce-ux/slds-linter@latest lint <path-to-changed-file>

Fix reported issues where possible. If something cannot be fixed, say so briefly.

Read the full file on GitHub · 68 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. 8d ago First seen · 68 lines · 1,518 tokens per session scan A 8b3eaaeed26d

Subscribe to this mod's changes

design-system-2-starter-kit AGENTS.md is an instructions file published in the GitHub repository salesforce-ux/design-system-2-starter-kit (23 stars, last pushed 17d ago), licensed Apache-2.0. It adds 1,518 tokens to every session, about $0.0076 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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