## What
New skill `hyperframes-registry` that teaches AI coding agents how to install and wire registry blocks and components into HyperFrames compositions.
### Skill structure
```
skills/hyperframes-registry/
SKILL.md — triggers, overview, quick reference
references/
install-locations.md — default paths, hyperframes.json config
wiring-blocks.md — iframe inclusion, data attributes, positioning
wiring-components.md — snippet merging (HTML, CSS, JS, timeline)
discovery.md — manifest reading, item fields, available items table
demo-html-pattern.md — why components ship demo.html, structure conventions
examples/
add-block.md — worked example: data-chart block install + wiring
add-component.md — worked example: shimmer-sweep component install + wiring
```
## Why
Phase B of the catalog plan (PR 10). Without this skill, agents using `hyperframes add` have to guess how to wire installed items into compositions. The skill encodes the iframe/snippet patterns so agents get it right on the first attempt.
## How
- SKILL.md frontmatter triggers on: `hyperframes add`, "block", "component", `hyperframes.json`
- References cover every step: discovery, install, wiring blocks (iframe), wiring components (snippet merge), and the demo.html convention
- Two worked examples walk through complete install-to-preview workflows
- Updated CLAUDE.md skills table + trigger rules, README.md skills table, docs/packages/cli.mdx
## Test plan
- [x] `scripts/lint-skills.ts` passes (checked 4 skill files, no issues)
- [x] `oxfmt --check` passes on all markdown files
- [x] SKILL.md frontmatter has valid `name` and `description`
- [x] All reference links in SKILL.md resolve to existing files
- [x] CLAUDE.md, README.md, and docs CLI page updated with new skill
