Extract authenticated coulomb.social design language via designlang

Session probe lands on /vw_pages (Research). Use main designlang extract
with --cookie-file — pack ignores auth. 39 artifacts under
docs/design-extract; tolerate designlang late summary crash when cores exist.

docs/design-extract/coulomb-social-AGENT.md

@@ -0,0 +1,115 @@
+# You are building UI in the coulomb.social design system.
+
+Source: https://coulomb.social
+Extracted by designlang on 2026-08-08.
+
+## Brand at a glance
+
+- title         Research | Coulomb
+- page intent   landing
+- material      flat
+- design grade  B
+
+## Colour
+
+- primary     #d08728
+- neutrals    #000000 · #efefef · #616161 · #373737 · #171717 · #ffffff
+
+## Typography
+
+- families   Helvetica · Arial · Times New Roman · Inter
+- weights    400 · 500 · 600 · 700
+- base size  16px
+
+## Spacing
+
+- scale      1px · 24px · 32px · 40px · 60px · 80px · 96px · 320px
+
+## Radii
+
+- scale      4px · 8px · 12px · 15px · 20px
+
+## Motion
+
+- durations  250ms
+
+## Voice
+
+- tone       neutral
+- pronoun    third-person
+- headings   unknown
+- CTA verbs  content · favorite · format · filter · add · arrow
+
+## Component anatomy
+
+- button     variants: [object Object]  ·  slots: true · true · false
+
+## Accessibility
+
+- WCAG score 100% · failing pairs: 0
+
+## Build rules
+
+1. Use the colours above. **Never invent a new hex.** If you need a
+   shade between two existing colours, derive it via HSL adjustment
+   from the closest extracted colour and call out the derivation.
+2. Use the extracted typography families. If you need a missing weight,
+   pick the nearest available weight from the list and note it.
+3. Snap spacing values to the scale above. No off-scale paddings or
+   margins.
+4. Snap border radii to the scale above.
+5. Match the voice: same tone, same pronoun stance, same heading
+   style. Reuse the listed CTA verbs.
+6. Aim for WCAG AA contrast minimum. When the brand colours fail,
+   prefer the foreground colour on the background colour rather than
+   mid-tone neutrals.
+7. Reuse component anatomy when it exists — do not invent novel
+   structures for things the site already has.
+
+## Available context files
+
+designlang wrote these alongside this prompt. Reach for them when
+you need ground truth:
+
+- `<host>-design-tokens.json` — DTCG primitive · semantic · composite tokens
+- `<host>-tailwind.config.js`  — Tailwind v3 config
+- `<host>-tailwind-v4.css`     — Tailwind v4 `@theme` block
+- `<host>-tokens.d.ts`         — TypeScript literal-union types
+- `<host>-variables.css`       — bare CSS custom properties
+- `<host>-reset.css`           — brand-aware base styles
+- `<host>-gradients.css`       — `.grad-N` utility classes
+- `<host>-anatomy.tsx`         — typed React component scaffolds
+- `<host>-shadcn-theme.css`    — shadcn/ui theme
+- `<host>-theme.js`            — React / Vue / Svelte theme object
+- `<host>-mcp.json`            — MCP server payload (load via stdio)
+- `<host>.brand.pdf`           — print-ready 13-chapter brand book
+
+When you reference the system in code, prefer importing from these
+files over hard-coding values.
+
+## Output expectations
+
+When asked to "build a pricing page" or "make a card" or any UI:
+
+- Produce a single self-contained component file in the appropriate
+  framework (React / Vue / Svelte — match what the user is using).
+- Use Tailwind utility classes wired to the v4 `@theme` if Tailwind
+  is available; otherwise use the CSS custom properties from
+  `variables.css`.
+- Write the headline copy using the brand voice; do not invent
+  generic Lorem.
+- Annotate any choice where you had to bend the system, with a
+  one-line `// note:` comment explaining what and why.
+
+## One-line install
+
+```bash
+npx designlang coulomb.social
+```
+
+Run this against any other URL to extract its system in the same
+shape as the one above.
+
+---
+
+Generated by designlang. Re-extract by running `npx designlang coulomb.social`.