docs: add prompt cookbook + prompting guide for AI agents (#286)

* docs: add prompt cookbook + prompting guide for AI agents

Addresses user feedback that there's no guidance on how to actually
prompt Claude Code (or other agents) once the hyperframes skills are
installed. Adds copy-pasteable example prompts in the README and
quickstart, a new prompting guide page, and a starter-prompt nudge in
the `hyperframes init` output.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs(prompting): add vocabulary tables, rules, and TTS voice guide

Merges the best content from the internal prompt guide into
prompting.mdx: easing vocabulary, caption tone table, transition
energy matrix, audio-reactive frequency mapping, marker highlight
modes, TTS voice recommendations, rendering quality presets, and
framework rules (technical requirements vs best practices).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs(prompting): rename page title to "Prompt Guide"

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: remove greensock/gsap-skills dependency, fix Math.random nuance

The bundled skills/gsap/ already covers the GSAP surface needed for
HyperFrames compositions. Installing greensock/gsap-skills on top adds
a competing full-ecosystem skill that's mostly irrelevant (ScrollTrigger,
Draggable, SplitText, etc.) and can confuse agents about which GSAP
context to load.

Also adds seeded-PRNG nuance to the Math.random() rule in the prompt
guide (matching the skill's actual guidance).

Removed from: skills.ts, README, AGENTS.md, shared AGENTS.md/CLAUDE.md,
and prompting.mdx.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: require minimal reproduction link in bug report template

Adds a required "Link to reproduction" input field asking users to push
a minimal repro to a public GitHub repo (scaffolded via
`hyperframes init repro --non-interactive --example blank`).

Also consolidates the OS/Node/FFmpeg/version fields into a single
"Environment" field using `npx hyperframes info` output — fewer fields
to fill, more consistent data.

Follows the same pattern as Next.js and Gatsby issue templates.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(issue-template): use hyperframes doctor for environment info

`hyperframes info` only prints project metadata (resolution, duration,
elements). `hyperframes doctor` prints the full environment: version,
Node.js, FFmpeg, Chrome, memory, disk, Docker — everything needed to
diagnose bugs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs(prompting): mention validate alongside lint in anti-patterns

Per Vance's review comment — validate catches runtime errors (JS
exceptions, missing assets, contrast) that lint doesn't.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: replace libretto example URL with hyperframes repo

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/skills.ts

@@ -27,15 +27,12 @@ function runSkillsAdd(repo: string): Promise<void> {
   });
 }
 
-const SOURCES = [
-  { name: "HyperFrames", repo: "heygen-com/hyperframes" },
-  { name: "GSAP", repo: "greensock/gsap-skills" },
-];
+const SOURCES = [{ name: "HyperFrames", repo: "heygen-com/hyperframes" }];
 
 export default defineCommand({
   meta: {
     name: "skills",
-    description: "Install HyperFrames and GSAP skills for AI coding tools",
+    description: "Install HyperFrames skills for AI coding tools",
   },
   args: {},
   async run() {