Handoff That Saves Time: A Developer‑First Asset Pack Checklist and Example Folder

Engineers need three things from a handoff: deterministic assets they can drop in the build, unambiguous implementation rules, and a minimal API contract or mock that defines runtime behavior. Treat the asset pack like a tiny RFC: name, purpose, expected behavior, and failing conditions.

Below is the core checklist. Each entry is written from the engineer’s perspective so designers and product managers know the exact item to produce and why it matters.

Annotations must be short, explicit, and discoverable inside the design file. Use Dev Mode (Figma) or component notes (Zeplin) for each interactive element. Put acceptance criteria next to the frame (not buried in a long doc). Prefer checklist-style bullets engineers can validate.

Acceptance criteria should include state names (default, hover, pressed, disabled), exact copy, validation rules for inputs, performance expectations (image size budget), and success/failure UI for async flows (e.g., loading skeletons vs spinners).

Don’t deliver a vague 'icons' folder—deliver a predictable, named set that maps to code. Use kebab-case for filenames, semantic prefixes, and include a manifest.json at the root that lists each item and its purpose.

Supply both human- and machine-friendly formats: source SVGs and a compiled icons.svg sprite (if your front-end uses sprites), raster fallbacks for legacy targets, and JSON tokens for design variables. Keep file sizes and vector cleanliness in mind: flatten unnecessary groups in SVGs and remove editor metadata.

Below is a concise folder structure you can copy into a project ZIP. Name the ZIP using the feature and version (feature-name-v1.0.zip). Include a README.md at the top with links to the Figma/Zeplin frames, the engineering owner, and required environment notes.

The README is the single source of truth for the handoff—make it a short checklist that the engineer can tick off when they finish implementing the feature.

A minimal API stub includes endpoint path, method, sample request body, sample response body, and HTTP error cases. Put these under api-stubs/ and provide curl examples or a Postman collection. This prevents ‘unknown field’ back-and-forth and lets engineers wire the UI to real-ish data quickly.

Validation is easier when you include small, executable checks: a QA checklist referencing acceptance-criteria files, and a short list of unit/integration tests the engineer should add (e.g., 'renders empty state when items.length == 0').