Dembrandt

Cancel a queued extraction job. Has no effect on jobs that are already running.

Grade colour pairs against WCAG 2.1 contrast, at the threshold the text size earns: 18pt, or 14pt bold, is large scale and needs 3:1 where body text needs 4.5:1. Takes pairs you name, so it grades colours you are about to ship rather than only colours already on a page. Returns the ratio, the required ratio, and the AA and AAA verdicts per pair. Pure and synchronous, no browser. For pairs already rendered on a site, extract with wcag instead.

Ask whether robots.txt allows extracting a URL, before spending a browser run on it. Returns the verdict, the rule that decided it, and the robots.txt status. A 404 or 410 means no robots.txt and everything is allowed; any other unreadable response is treated as a refusal. Cheap and synchronous: one HTTP request, no browser.

Compare two dembrandt extractions and return a design-drift report: a 0-100 score (0 = identical), a stable/drift verdict, per-category scores, and the list of changed/added/removed tokens (colors, typography, spacing, radius, shadows). Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one. Use it to check whether generated or updated UI has drifted from a brand baseline.

Convert a dembrandt extraction to W3C Design Tokens (DTCG) format: color, typography, spacing, radius, border, and shadow tokens with $type/$value structure and dembrandt provenance under $extensions. Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one. Use it to hand tokens to Style Dictionary, Figma token plugins, or any DTCG-compatible pipeline.

Render a shadcn/ui theme from a dembrandt extraction: the :root block and the @theme inline mapping Tailwind v4 needs. A slot is written only where the page supplied a value, and the rest are named in the file header and left at shadcn's own defaults, so no slot is filled with an invented value that reads as measured. Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one.

Render a Tailwind v4 @theme CSS block from a dembrandt extraction: colors, typography, spacing, radii and shadows as custom properties, observed values only, with nothing invented. Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one. Write the output to a project's CSS entry point so Tailwind utilities resolve to the measured brand.

Render a DESIGN.md brand guide (markdown) from a dembrandt extraction: colors, typography, spacing, surfaces, and components as a human-readable design reference. Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one. Write the output to DESIGN.md in a project so agents and developers build UI against the extracted brand.

Extract brand identity from a live website: site name, logo (source, dimensions, safe zone), all favicon variants (icon, apple-touch-icon, og:image, twitter:image with sizes and URLs), what builds the UI with versions where recoverable (JS and meta frameworks, CSS frameworks, component libraries, site builders), icon systems, and responsive breakpoints. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Extract brand colors from a live website. Returns semantic colors (primary, secondary, accent, plus background and text promoted from the page surface and body text), full palette ranked by usage frequency and confidence (high/medium/low), CSS custom properties with their design-system names, and hover/focus state colors discovered by simulating real user interactions. Each color in hex, RGB, LCH, and OKLCH. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Extract UI component styles from a live website. Returns button variants with default, hover, active, and focus states (background, text color, padding, border radius, border, shadow, outline, opacity), input field styles (border, focus ring, padding, placeholder), link styles (color, text decoration, hover changes), and badge/tag styles. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Extract the full design system from a live website. Launches a real browser, navigates to the site, and returns production-ready design tokens: color palette (hex, RGB, LCH, OKLCH) with semantic roles and CSS custom properties, typography scale (families, fallbacks, sizes, weights, line heights, letter spacing by context), spacing system with grid detection, border radii, border patterns, box shadows for elevation, component styles (buttons with hover/focus states, inputs, links, badges), responsive breakpoints, logo and favicons, site name, the frameworks and libraries that build the UI, and icon systems. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Lint a dembrandt extraction for design-system quality issues: WCAG contrast failures, inconsistency (near-duplicate colors, off-scale spacing values, radius sprawl), and duplication. Returns findings with severity (error/warn), category, and a human-readable message, plus summary counts. Pure and synchronous, no browser. Takes either an inline extraction or the job_id of a completed one. Complements compute_drift: drift asks 'did it change', findings asks 'is it good'.

Poll for the result of an async extraction job. Returns status (queued/running/completed/failed/cancelled) and the full result once completed. Call this after any extraction tool that returned a job_id.

Extract the motion system from a live website: transition and animation durations with their usage counts, easing curves, the durations and easings used per component context (button, link, nav, card, modal), named keyframe animations, and the hover patterns discovered by simulating real interaction. Also returns gradients, which travel with motion as the decorative layer. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status.

Extract the spacing system from a live website: common margin and padding values sorted by frequency, pixel and rem values, and grid system detection (4px, 8px, or custom scale). Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Extract surface treatment tokens from a live website: border radii with element context (which radii are used on buttons vs cards vs inputs vs modals), border patterns (width + style + color combinations), and box shadow elevation levels. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

Extract typography from a live website. Returns every font family with its fallback stack, the complete type scale grouped by context (heading, body, text, button, link, caption) with pixel and rem sizes, weights, line heights, letter spacing, and text transforms. The body context marks the dominant reading-text font; text marks other body-eligible copy. Also reports font sources: Google Fonts URLs, Adobe Fonts usage, and variable font detection. Set pages > 1 to crawl and merge several pages, which yields a markedly stronger token set than a single page. Returns a job_id by default: poll it with get_job_status, and pass the same job_id to compute_drift, get_findings, export_dtcg, generate_design_md or render_report instead of resending the extraction.

List all extraction jobs from this session with their status (queued/running/completed/failed/cancelled), URL, and timestamps. Completed jobs are kept for one hour.

Render a self-contained HTML report (inline CSS, no external resources) from a dembrandt extraction, optionally including a drift diff. Takes either an inline extraction or the job_id of a completed one. Returns the HTML as text: write it to a .html file to open offline or attach as a CI artifact.

Validate a W3C Design Tokens (DTCG) document against the 2025.10 spec: token types, colour objects and their component ranges, dimensions, references, and property-level $ref pointers. Returns valid plus the list of errors with the path each one sits at. Pure and synchronous, no browser. Use it after writing or editing a token file, including one this server produced, so a hand edit cannot quietly break the document.