Narrative Scrollytelling

Announce at start: "I'm using the humane:narrative-scrollytelling skill to turn this sequence into a scroll story that remains a readable document."

Scrollytelling is a document before it is choreography. The ordered ideas, headings, prose and media alternatives form a complete canonical reading order; scroll position may change their presentation, never their existence or meaning.

Quick reference

Need	Read
Story shapes, drivers, sticky stages and pacing	references/patterns.md
The story-map fields and fallback invariants	references/contract.md

Build the story map

1. Establish the ordered beats outside the visual treatment. Each beat carries one claim or change in understanding and a stable id.
2. Choose the least demanding driver that expresses the relationship: discrete-intersection for prose steps, view-progress for a visual whose change follows its visibility, and scroll-progress only when intermediate states themselves communicate meaning.
3. Decide what remains in normal document flow and what may be sticky. A sticky visual stage is normally non-focusable; interactive content stays in logical source order.
4. Specify navigation and fallbacks before transition polish: anchors, previous/next where useful, skip-story, no-JavaScript, reduced-motion, no-motion and unsupported-driver behavior.
5. Only then name transition intents and token references.

Write the result using references/contract.md. When the user wants a saved artifact, resolve artifact_path(name, "narrative-scrollytelling", "json"); never assemble a .design path at the call site. Validate a saved map with python3 scripts/validate_map.py <map.json>.

Hard boundaries

• steps[] order is canonical DOM and reading order. Every essential fact is present as semantic content outside canvas frames, keyframes and transition labels.
• Native page scrolling remains in control. Do not hijack wheel/touch input, lock the reader into a scene, require scroll speed/direction, or turn the document into an inaccessible slide deck.
• Scrolling does not move focus or announce every step. Sticky authored content cannot obscure focused controls; reserve safe offsets and scroll padding.
• Default snap is none; proximity is optional. mandatory requires an explicit audited exception proving all content remains reachable at zoom, reflow, large text and short viewports.
• Reduced motion removes parallax, scrubbed spatial travel, smooth scrolling and long pinning. The fallback uses discrete static states or the linear document; meaning never depends on an exact progress fraction.
• No-JavaScript and unsupported-feature modes expose the whole story. Native CSS scroll timelines are progressive enhancement, not a prerequisite.
• Continuous automatically started movement is absent by default. If an essential presentation exceeds five seconds alongside other content, provide pause, stop or hide controls and name the reason.

Embedded interactions and sound

This skill owns chapter activation and presentation, not feedback for buttons, toggles, maps or other controls inside a chapter. Hand those bounded transitions to humane:semantic-micro-interactions.

Passive scroll crossings do not play sound. If the experience has opted into audio, explicit chapter navigation or a genuinely committed milestone may emit a semantic soundEvent through its micro-interaction map; sound-effects then owns the audio asset and playback layer. Narrative ambience, scoring and narration are outside this skill.

Verification and handoff

Read the complete story with CSS and JavaScript disabled, then with reduced and no motion. Test forward and reverse keyboard traversal, anchors, previous/next, skip-story, zoom/reflow, short and narrow viewports, touch scrolling, back/forward navigation, refresh at a deep anchor, and fast bidirectional scrolling. Confirm that every visual state resolves and that no focused control is hidden.

Record observed coverage and mark the rest Not verified. Hand the operable story to humane:walkthrough; this skill owns the narrative mechanism, while walkthrough determines whether a reader can actually understand and complete the intended path.

What this skill does not own

Concern	Owner
The source wording of headings and prose	ux-writing
Duration, dimension, color and typography values	design-tokens
Bounded component feedback inside a chapter	semantic-micro-interactions
Sound generation, assets and playback	sound-effects, reached through the micro-interaction hook
Task success and contextual verification	walkthrough
Framework-specific scroll-animation craft and accessibility engineering depth	interfaces when installed; otherwise mark the implementation depth Not reviewed