da-express-milo: Instructions file for Claude Code

CLAUDE.md

da-express-milo CLAUDE.md is an instructions file for Claude Code from adobecom/da-express-milo. It costs 422 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for Adobe Express web components built with AEM Edge Delivery Services, a system for delivering Adobe web pages, and Milo. They cover block authoring, shared utilities, and testing rules.

In plain words
What is it for?
Use them when editing Adobe Express blocks, links, icons, shared scripts, or tests.
Why use it?
They record project-specific restrictions, such as avoiding direct HTML replacement and sourcing text from authored content, which helps prevent broken components and inaccessible pages.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is adobecom/da-express-milo's own configuration. It tells Claude Code how to work on da-express-milo 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 da-express-milo configures →

Reuse

Borrowing it

Nothing to install: this file belongs to adobecom/da-express-milo. 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/adobecom/da-express-milo/stage/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/adobecom/da-express-milo

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.

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README.md
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Per session 422 This file is loaded in full into every session.
When invoked 422 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 $0.00422 $0.00422
Opus 5.5 $0.00169 $0.00169
Sonnet 5.5 $0.00084 $0.00084
Haiku 4.5 $0.00042 $0.00042

Measured 1mo ago against content hash c1c26d1cb990, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

da-express-milo CLAUDE.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 1mo 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.md · 25 lines

What it actually says

Express

adobe.com/express — AEM Edge Delivery Services + Milo. Vanilla JS, Lit/Spectrum Web Components, CSS design tokens.

Block Authoring Rules

  • Never use .innerHTML — destroys Preact/Lit components; use .append() or cloneNode

Express-Specific Utilities (non-obvious)

  • Icons: getIconElementDeprecated('adobe-express-logo') — use deprecated helper for cross-express compatibility
  • Cart CTAs: formatDynamicCartLink(cta) — always async-enhance dynamic cart links
  • Branch tracking: await trackBranchParameters([link]) — always await on CTAs

Important Conventions

  • No hardcoded text in blocks — all text (including a11y) must come from authored DOM content or placeholders via replaceKey/replaceKeyArray
  • scripts.js loads on every page — changes require high scrutiny
  • color.adobe.com shares this codebase; its blocks are: color-blindness, color-contrast-checker, color-explore, color-extract, color-headline, color-wheel; shared code in /libs/color-components/ and /scripts/color-shared/
  • To run the local dev server against color content (so color.adobe.com blocks render real data), use npm run up:color instead of plain aem up

Linting

  • Don't add stylelint-disable/eslint-disable comments unless it's a last resort (e.g. suppressing a pre-existing violation to avoid an unrelated regression-testing pass). Fix the underlying violation instead.
  • If you edit a CSS file that has an existing stylelint-disable-line/stylelint-disable-next-line comment, fix the violation and remove the comment as part of that change, even if the violation isn't related to what you're editing.

Testing

  • No real/staging URLs in test data — use mock HTML files or sinon stubs instead.
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. 1mo ago Changed · +1 lines · +39 tokens per session c1c26d1cb990
  2. 1mo ago Changed · +4 lines · +99 tokens per session 3f3ac7830dfb
  3. 2mo ago First seen · 20 lines · 284 tokens per session scan A 4a57532976b3

Subscribe to this mod's changes

da-express-milo CLAUDE.md is an instructions file published in the GitHub repository adobecom/da-express-milo (6 stars, last pushed yesterday), licensed Apache-2.0. It adds 422 tokens to every session, about $0.0017 per session on Opus 5.5. 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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