COMPILER PIPELINE // AST GENERATION & MULTI-TARGET CODEGEN

From Figma Variables to Native Code in 12ms

An end-to-end inspection of Kroma's zero-runtime AST engine, bi-directional token synchronizer, and multi-brand white-label architecture.

account_tree Explore AST Explorer

npx kroma-sync@latest

● DTCG v2.4 Compliant

AST Transpile Latency

12ms p99 benchmark

Rust-powered parallelized tokenizer

Client Runtime Overhead

0.0kb Zero-Runtime

Pure build-time ahead-of-time (AOT) emission

Strict TypeScript Autocomplete

100% .d.ts Sync

Deterministic type assertion on every key

Token Inheritance Topology

Multi-Tenant

Cascading enterprise white-label resolution

End-To-End Ingestion Loop

Deterministic Pipeline Flow

Live Stream Active Buffer: 0 dropped

STAGE 01 // INGEST 2.1ms

Figma REST & Webhook

Subscribes to enterprise design file changes via payload streaming. Extracts color scopes, float variables, and typography arrays.

POST /v1/webhook 200 OK

Payload: 2,148 token nodes

Checksum: sha256:7f49c2...

Sync state: Clean

STAGE 02 // PARSE 4.2ms

AST Graph Normalizer

Constructs Directed Acyclic Graph (DAG) for multi-tier aliases. Verifies circular references and WCAG AAA automated contrast scoring.

AST: TokenGraphContext

0 Circular Dependencies

Contrast Ratio: 8.92:1 (AAA)

DAG Resolved

STAGE 03 // CODEGEN 3.8ms

Multi-Target Transpiler

Parallel emitters convert the resolved AST simultaneously to CSS, Tailwind v4 @theme, Swift 6 Structs, Kotlin Compose, and d.ts.

Targets: Web | iOS | Android

Emitters: 5 active parallel

Bundle Overhead: 0 bytes

Artifacts Emitted

STAGE 04 // GATEKEEP 1.9ms

CI Gatekeeper & Push

Executes pre-commit AST linting, checks for hardcoded values in PR branches, and automatically deploys versioned NPM packages.

GitHub Action: Passed

Registry: @kroma/tokens-v3

Registry Sync: Published

Auto-PR Merged

Internal Subsystems

Engine Specifications & AST Subsystems

Explore the internal mechanics powering zero-drift token compilation across distributed enterprise frontend platforms.

MODULE_01 // REST_SYNC_ENGINE

Bi-Directional Figma REST & Webhook Bridge

Continuous polling combined with real-time push webhooks. Automatically ingests Figma variables, color modes (Dark/Light/High-Contrast), typography scales, spacing primitives, and composite elevation definitions without manual plugin exports.

check Sub-second webhook ingestion upon variable commit
check Bi-directional schema writes: Push token aliases back to Figma
check SHA-256 state hashing for delta-only updates

figma.webhook.ingest.json

HTTP 200 OK — 42 tokens ingested

{

"event_type": "VARIABLE_COMMIT",

"collection_id": "VariableCollectionId:482:9182",

"modes": ["101:0", "101:1"], // Light & Dark

"delta_payload": [

{

"id": "VariableID:brand-accent",

"name": "color/signal/acid-lime",

"type": "COLOR",

"resolved_value": "#c6ff00",

"w3c_spec": "design-tokens/v2.4"

}

"telemetry": { "latency_ms": 1.84, "ast_valid": true }

}

MODULE_02 // AST_GRAPH_ENGINE

Universal AST Token Parser & Graph Resolver

Normalizes raw design tokens into the W3C Design Token Community Group (DTCG) specification. Resolves circular math aliases, automatic dark mode contrast balancing (WCAG AAA 8.9:1), and recursive multi-layer alias references.

balance Automated Contrast Matrix

Calculates relative luminance ratios on compile. If a token fails accessibility constraints, the AST normalizer suggests contrast-balanced hex overrides.

AST_DEPENDENCY_TREE_VISUALIZER DAG Depth: 3 Tiers

TIER 1: PRIMITIVE palette.lime.400

#c6ff00

↳ Resolved alias link via {palette.lime.400}

TIER 2: SEMANTIC color.action.primary.focus

var(--palette-lime-400)

↳ Resolved component reference with WCAG AAA verification (9.12:1)

TIER 3: COMPONENT button.primary.glow-stroke

0 0 12px rgba(198, 255, 0, 0.4)

MODULE_03 // CODEGEN_EMITTER

Multi-Platform Codegen Transpiler

Simultaneous, parallelized code generation targets. Compiles resolved AST directly to modern Tailwind v4 @theme directives, pure CSS custom properties, strict TypeScript declaration files, iOS Swift 6 structures, and Android Jetpack Compose classes.

WEB

CSS / Tailwind

APPLE

Swift 6.0

ANDROID

Compose / XML

EMIT: 1.2ms

/* Generated automatically by Kroma AST Engine v3.4.2 */

/* Target: Tailwind CSS v4 Modern Theme Spec */

@theme {

--color-brand-primary: #c6ff00;

--color-brand-surface: #101319;

--color-brand-border: #272b35;

--spacing-touch-target: 44px;

--elevation-interactive: 0 0 12px rgba(198, 255, 0, 0.2);

--font-mono-system: "JetBrains Mono", monospace;

}

/* Exported TypeScript Typings */

export type KromaThemeColors = 'brand-primary' | 'brand-surface' | 'brand-border';

MODULE_04 // CI_GATEKEEPER

Git & CI/CD Token Gatekeeper

Automated GitHub Action and local pre-commit hook that scans PR diffs for rogue, hardcoded hex values (e.g. #ff0033 or arbitrary inline paddings). Blocks merging and automatically provisions automated codemod suggestions with 1-click fixes.

dangerous 1 Hardcoded Hex Caught

auto_fix_high Codemod Ready

✕ Kroma Token Linter — FAILED

PR #402 / Commit ed83b0

error

Rogue hardcoded hex string detected

src/components/Button.tsx:28:14

- const DangerButton = styled.button`background-color: #ff0033;`;

+ const DangerButton = styled.button`background-color: var(--color-brand-danger);`;

Enforced policy: strict-zero-hex

Automated Regression Guard

Zero-Tolerance Token Drift Detection

Every build mathematically validates that UI styling artifacts exactly mirror canonical token nodes across all runtime viewports.

Playwright VRT: 0.00% Drift [PASSED]

BRANCH: release/v3.4 EXIT: 0

$ kroma audit --strict --diff-staged --enforce-ast

[KROMA-CLI] Loading AST schema v2.4.0 against repository diffs...

Found 1 staging file modified: packages/ui/src/Badge.module.css

@@ -14,6 +14,6 @@ .kroma-badge-critical {

display: inline-flex;

align-items: center;

- background-color: #ff0033; /* HARDCODED HEX DETECTED */

- border-radius: 4px; /* ARBITRARY PIXEL VALUE WITHOUT TOKEN */

+ background-color: var(--color-brand-danger); /* RESOLVED VIA KROMA AST */

+ border-radius: var(--radius-sm); /* RESOLVED VIA KROMA AST */

font-family: var(--font-mono-system);

✔ AST verification pass: 4.2ms

✔ Automated codemod generated

✔ 0 regressions across 140 viewports

Automated Commit Ready: "chore(tokens): codemod rogue hex to semantic tokens"

Engine Performance

Architectural Benchmarks

Independent pipeline comparison across 2,500 token nodes in enterprise repository environments.

Evaluation Metric	Kroma AST Engine v3.4	Legacy Style-Dictionary	Runtime CSS-in-JS (Emotion/Styled)
Compilation Latency (2,500 tokens)	12.4ms (Rust Multi-Threaded)	1,420ms (Node.js single)	N/A (Evaluated at client runtime)
Client-Side Runtime JS Bundle	0.00 KB (Pure Build-Time AOT)	0.00 KB (Static outputs)	14.8 KB - 32.4 KB min+gzip
Type Coverage & Invalidation Safety	100% Strict Autocomplete (.d.ts)	Basic types, partial inference	Dynamic ThemeProvider typing
Bi-Directional Figma Variable Sync	Native REST Webhooks (Sub-second)	Manual JSON file export required	None (Code only)
WCAG AAA Automated Contrast Math	Built-in Graph Normalizer Pass	Third-party plugin required	Manual calculation

ENTERPRISE SCALE ENGINE

Ready to Unify Your Design Tokens at Machine Speed?

Eliminate handoff ambiguity and design regressions with Kroma's zero-runtime AST compilation pipeline. Deploy into your existing GitHub CI workflows in minutes.

npx @kroma/engine init --enterprise

Deploy Token Engine

verified_user SOC 2 Type II Certified

lock_open Zero Vendor Lock-in (W3C DTCG Open Spec)

cloud_done Self-Hosted or Edge Managed