text-to-lottie

Text To Lottie

Author production-ready Lottie JSON for the official local Skia Skottie player.

The deliverable is a renderable scene in the player, not isolated JSON.

Operating Model

• Use the official player project and verify in Skia Skottie. Do not hand-roll a

custom viewer or switch renderers for verification.

• Keep the skill portable across Agent Skills clients. Avoid host-specific

commands, command modes, or orchestration conventions in skill instructions.

• Prefer fewer questions and stronger defaults. Ask only when a decision changes

the output materially, such as transparent vs full-frame background, brand

constraints, target format, or supplied source assets.

• Prioritize clean, intentional, professional motion over merely satisfying the

literal prompt.

Reference Loading

This SKILL.md is the thin control plane. Load only one-level references that

match the task. Do not open the whole reference library.

Always read references/player-contract.md before creating, editing, fixing, or

verifying a scene. If a routed reference is unavailable, continue using the

inline rules in this file.

| User intent | References to read when present |

| --- | --- |

| Any new/edit/fix Lottie scene | references/player-contract.md |

| JSON structure, keyframes, slots, shapes, assets | references/lottie-spec-map.md |

| Logo animation | references/recipe-logo.md, references/motion-taste.md, references/design-taste.md |

| Typography, title, quote, text reveal | references/recipe-typography.md, references/design-taste.md, references/motion-taste.md |

| Lower third, name tag, caption bar, overlay | references/recipe-lower-thirds.md, references/design-taste.md, references/motion-taste.md |

| Loader, icon, spinner, badge animation | references/recipe-loaders-icons.md, references/motion-taste.md |

| Success, error, warning, completion, empty state | references/recipe-loaders-icons.md, references/design-taste.md, references/motion-taste.md |

| UI microinteraction | references/recipe-ui-microinteractions.md, references/design-taste.md, references/motion-taste.md |

| Generic "animate this SVG" or SVG-to-Lottie | references/recipe-svg-animation.md, references/svg-compatibility.md, references/motion-taste.md |

| Camera follow, pan, zoom, parallax, scene motion | references/recipe-camera-scene-motion.md, references/design-taste.md, references/motion-taste.md |

| Diagram, technical line animation, callout, flow trace | references/recipe-diagram-technical.md, references/design-taste.md, references/motion-taste.md |

| Data, stats, KPIs, charts, metrics, dashboard figures | references/recipe-data-stats.md, references/design-taste.md, references/motion-taste.md |

| Product launch, feature announcement, social promo | references/recipe-product-promo.md, references/design-taste.md, references/motion-taste.md |

| Long text, multiple ideas, list/features/steps, timeline, before/after, problem/solution, quote+proof, recap/story, product walkthrough, multi-language variations, chapters, multi-beat sequence, episode, jump/hard cuts, transition grammar | references/chapterization-transition-grammar.md, references/motion-taste.md |

| Glow, glass, metal, gradient, fill, bubble/burst effects | references/recipe-visual-effects.md, references/design-taste.md, references/motion-taste.md |

| SVG input inside logo/icon/UI/lower-third work | The task recipe plus references/svg-compatibility.md |

| Starter brief or reusable project direction | references/recipe-starter-projects.md, references/design-taste.md, references/motion-taste.md |

| Any "premium", "clean", "minimal", "modern", "sleek", or "polished" qualifier | references/design-taste.md (restraint defaults), plus the routed recipe |

For mixed prompts, choose one primary recipe from the main deliverable, then add

secondary references for source format or visual treatment. Examples: SVG logo

with glow uses logo as primary plus SVG compatibility and visual effects;

product launch with pan/zoom uses product promo plus camera scene motion;

technical SVG diagram tracing uses diagram/technical plus SVG compatibility;

kinetic title with glass sweep uses typography plus visual effects.

Workflow

1. Route the task using the table above. Read only the relevant references that

exist.

2. Locate the official player project and resolve the target scene using the

target precedence below. Before editing, verify the resolved path is

public/projects/<project>/<scene-N>/lottie.json; re-read that current file

immediately before overwriting because the UI can write slot edits back to

source.

3. Decide the background policy before authoring.

4. Write or update public/projects/<project>/<scene-N>/lottie.json and, when

useful, controls.json.

5. Validate JSON, run or reuse the dev server, inspect exact frames with

?frame=N, and fix render/design/motion issues before finishing.

Inline Rules

Design Defaults (always apply)

These few defaults are non-negotiable and apply to every designed scene. Load

references/design-taste.md for the full reasoning, especially for any

"premium", "clean", "minimal", "modern", or "card" prompt.

• Premium means subtract, not add. When a prompt says premium, clean, minimal,

modern, sleek, or sophisticated, default to restraint: remove chrome before

adding it. Premium is carried by scale, weight, brightness, spacing, and

timing, never by cards, borders, dividers, shadows, glow, or stacked tints.

• Chrome/container budget is 0 by default. Do not add a framing card,

container, border, or divider unless it does a job that whitespace and

alignment cannot. Separate grids and columns with negative space and alignment

first, a single hairline second, and a filled or bordered card last and only

when explicitly warranted.

• One surface tone. Use one background tone. Do not stack two near-black or two

near-white tints to fake a "surface"; it reads muddy. If a card surface must

differ from the background, make it one deliberate step with a clear purpose.

• One divider treatment, one color. If dividers are truly needed, use one weight

and one color for all of them, title rule and column rules included. Never use

slightly different colors or weights per divider.

Scene Rules

• Scene files live at public/projects/<project>/<scene-N>/lottie.json.
• Resolve target scenes by authority: an explicit file path wins; a browser URL

route like /<project>/<scene> wins next; an already-known project/scene for

the task wins next; otherwise create a new safe scene. Use /__context only

for discovery, verification, or playback state unless the task explicitly says

to edit what is currently on screen and no more specific target exists. Do not

let /__context.live override a known file path, URL, or project/scene.

Overwrite main-project/scene-1 only if it is still the untouched placeholder;

otherwise create a new scene.

• Full-frame standalone compositions should include a visible background layer

with a bgColor slot and controls.json entry.

• Transparent-by-default outputs include logos, icons, loaders, overlays, lower

thirds, and SVG-derived assets unless the user asks for a background.

• Include top-level v, fr, ip, op, w, h, nm, assets, and

layers. Treat op as exclusive.

• Use purposeful easing and staging. Avoid defaulting to linear motion. Derive

easing from the behavior-based anchors in motion-taste.md (chosen by motion

behavior, focal element strongest); do not fall back to one uniform ease for

every layer.

• Use slots for important editable values and add controls.json labels/ranges

when they improve the properties panel.

• For SVG input, preserve the viewBox, normalize styling, watch fill rules and

intersections, and verify the result in Skottie.

• Native Lottie text/text slots (ty:5) render in this player when the scene

ships its font: drop a .ttf/.otf/.ttc next to lottie.json, declare it in

fonts.list with fFamily matching the font's embedded family name, and

reference it from text documents. The loader passes every scene font to Skottie.

Prefer native text; reach for vector/shape text only for deliberate path effects

(stroke-on, glyph morphs, handwriting). See the player-contract "Native Text"

reference.

Verification

Before finishing:

1. Confirm the intended target file path is

public/projects/<project>/<scene-N>/lottie.json.

2. Validate JSON:

```bash

node -e "JSON.parse(require('fs').readFileSync('public/projects/<project>/<scene-N>/lottie.json','utf8'))"

```

3. Confirm the official player is running and the scene appears in

GET /__context.

4. Inspect pinned frames in the browser. For new scenes, check frame 0,

midpoint, and op - 1.

5. Confirm the background policy matches the use case.

6. Check for blank canvas, missing assets, unstyled shapes, wrong layer order,

bad easing, awkward timing, cropped content, text overflow, and visible SVG

artifacts.

7. Finish only when the animation renders cleanly and feels intentional.

Maintenance Evals

Do not read eval files during normal animation work. Use them only when testing

or changing this skill:

• evals/trigger-prompts.json
• evals/routing-prompts.json
• evals/reference-loading-prompts.json
• evals/output-rubric.md