starlight-custom-component SKILL.md skillA
starlight-custom-component from pantheon-org/tekhne is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add pantheon-org/tekhne/starlight-custom-component@git:20261002.e6369eePins git:20261002.e6369ee in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- pantheon-org/tekhne
- Path
skills/documentation/astro-starlight/skills/starlight-custom-component/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261002.e6369ee, committed Oct 2, 2026
- First version recorded
- Mar 17, 2026
- Size
- 7,455 bytes
- Repository stars
- 10
- License
- MIT
Create and override Astro Starlight UI components. Use when replacing or extending built-in Starlight components (header, footer, sidebar, page title, etc.), adding custom UI alongside existing components, accessing page route data inside a component, or applying overrides conditionally on specific pages.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Starlight Custom Components Starlight's built-in UI can be extended or replaced by registering your own Astro components. Use this when CSS is not enough or you need behavioral changes. ## When to Use - Changing a Starlight UI element that CSS alone cannot address - Adding new UI alongside an existing Starlight element (e.g., a banner above the header) - Replacing a built-in component with different markup or behavior - Conditionally rendering different UI on specific pages ## When Not to Use - Simple color or font changes — use `starlight-theme` instead - Adding documentation content (pages, sidebars) — use `starlight-base` instead ## Philosophy **Starlight's UI is a set of named slots. You swap slot implementations, not DOM nodes.** - **Named slots, not selectors.** You register a replacement `.astro` file for a named component slot in `astro.config.mjs`. No CSS selector is involved: you replace the entire component rendering. - **Wrap, don't replace.** Import the default component and render it inside your override to add behavior without duplicating Starlight's markup. This keeps you compatible with future Starlight updates. …
Read the whole file at its exact version.
How to install
mdr add pantheon-org/tekhne/starlight-custom-component@sha256:f43a9c1047a70acdThe line at the top of this page pins the label git:20261002.e6369ee, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_bl3penoonrgfbkxq)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Mar 17, 2026 and Oct 2, 2026, about one every 198 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261002.e6369ee latest | 2026-10-02 | e6369ee | 7,455 B | A | view · diff |
| git:20260317.05c5010 | 2026-03-17 | 05c5010 | 5,622 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7455 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
pantheon-org/tekhne · 10 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bl3penoonrgfbkxq GET https://markdownregistry.com/api/v1/resolve?ref=pantheon-org/tekhne/starlight-custom-component GET https://markdownregistry.com/api/v1/blob/f43a9c1047a70acd9ed9595c21db8681669bd737b48d393f15a9944c829d59be
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.