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name: feishu-whiteboard-pro version: 1.0.0 description: > Build beautiful, editable Feishu / Lark (飞书) whiteboards with deliberate composition, not just good colour. Use whenever the user wants to create or draw a Feishu whiteboard, infographic, diagram, poster, system map, or visual explainer and wants it to actually look designed — strong visual hierarchy, intentional layout, breathing room — rather than a templated grid of boxes. The agent commits to a design brief (composition archetype + colour strategy + type roles + an anti-cliché check) BEFORE drawing, builds against a coordinate skeleton with a fixed type scale and spacing grid, then runs a design-critique pass (hierarchy / balance / density / contrast / alignment) after rendering and fixes the weakest axis until it clears. Returns the doc link and the rendered image, and offers to switch palettes. Requires lark-cli (npm @larksuite/cli) installed and authenticated, and a Feishu/Lark account. license: MIT. Palette templates and the medium rules are adapted from beautiful-feishu-whiteboard (MIT, © Zara Zhang @zarazhangrui); the composition, critique, fit-check, and gated-pipeline layers are original additions. Design-judgment approach inspired by the impeccable / frontend-design skills (no code copied).

Feishu Whiteboard Pro

A design-judgment skill for Feishu SVG whiteboards. It does not just hand you a palette and let you wing the layout — it forces a design brief before you draw and a design critique after you render. The board you produce is a real, editable Feishu whiteboard inside a doc, not a screenshot.

The whiteboard medium is deliberately limited: one font, native rects/circles/connectors only, no gradients, no filters, no opacity, no motion. So "beautiful" here means composition, hierarchy, rhythm, colour discipline, and whitespace — never effects. Spend your craft there.

Three things make output good, and each has a home:

• What the medium allows → RULES.md. Hard limits, verified on the real board. Always read.
• How to compose → COMPOSITION.md. Archetypes with coordinate skeletons, the type scale, the spacing grid. The core of this skill.
• Whether it's actually good → CRITIQUE.md. The post-render design rubric and how to fix each axis.

When to use

• The user wants a Feishu / Lark whiteboard, infographic, diagram, poster, or visual explainer that should look genuinely designed — clear focal point, real hierarchy, not a wall of equal boxes.
• The user gives content ("explain X as a whiteboard", "turn this into a board") and wants it visual, editable, and on a Feishu canvas.
• The user names a style, or points at a palette.

Step 0: prerequisites (check before doing anything)

Run scripts/preflight.sh, or check manually:

• Node 20 or newer.
• lark-cli (npm package @larksuite/cli), installed and authenticated. If missing: npm install -g @larksuite/cli, then lark-cli config init (scan the QR), then lark-cli auth login.
• @larksuite/whiteboard-cli, used via npx, auto downloads, no install needed.
• A Feishu / Lark account. The board is written to the user's own tenant.

If lark-cli is missing or not authenticated, tell the user exactly how to install and authenticate, then stop. You cannot write a board without it.

The pipeline

The old way — pick a palette, then lay it out "however reads best", then fix overflow — is exactly how boards end up as bland grids. This skill replaces the two soft steps with gates: a design brief before drawing, a design critique after rendering. Do not skip either.

Understand the content
   │
   ├─▶  GATE 1 · Design brief        (before any SVG — see below)
   │
   ▼
Compose against the skeleton         (COMPOSITION.md: archetype coords + type scale + spacing grid)
   │
   ▼
Render → fix correctness             (RULES.md workflow: overflow / overlap / clipping / arrows)
   │
   ▼
GATE 2 · Design critique             (CRITIQUE.md: score, fix the weakest axis, re-render, repeat)
   │
   ▼
Write into Feishu → view live → deliver

1. Understand the content

Find out what goes on the board: the content, its purpose, the audience. If the content is unclear, ask one short question. Do not interrogate the user about visual style — you will commit to that yourself in the brief, and offer a swap at the end.

GATE 1 · Design brief (mandatory, before you write any SVG)

Read COMPOSITION.md and CATALOG.md first, then write down these five commitments. This is the whole point of the skill — a board drawn without a brief drifts into a uniform grid. Keep it to a few lines; it is for you, not the board.

1. Narrative shape → archetype. What relationship does the content actually have — sequence, comparison, hierarchy, radial, matrix, timeline, focus+detail? Pick the matching archetype from COMPOSITION.md and take its coordinate skeleton. The content's structure picks the archetype; do not default to a column-of-cards.
2. Focal point. Name the single thing the eye must hit first, and how it earns that (size, weight, colour, isolation, position). Exactly one primary focus per board.
3. Colour strategy + palette. Choose a strategy on the commitment axis — Restrained (tinted ground + one accent), Committed (one colour carries 30–60%), or Full (3–4 named roles) — then pick the CATALOG.md palette that serves it. Strategy first, swatches second. Prefer an anchor (they're reliable, swappable skins). If none fits the mood, generate a palette per templates/GENERATE.md — it comes out in the same frontmatter shape, so it stays swappable; keep it inline for this board (GENERATE.md covers where a generated palette can live — don't write it into the skill dir at runtime).
4. Type roles. Assign the COMPOSITION.md type scale to the content: what is Display, what is Heading, what is Body, what is Caption. Hierarchy comes from this assignment, not from drawing.
5. Anti-cliché check. Write one line: "The reflex version of this board is ___; I am avoiding it by ___." (e.g. "reflex = three equal icon+title+text cards; avoiding by an asymmetric focus+detail split.") If you can't name the reflex, you're probably about to draw it. See COMPOSITION.md §Anti-cliché.

Tell the user, in one line, the archetype and palette you chose and why. Then build.

2. Compose against the skeleton

If your chosen archetype matches one in examples/, start from that .svg — copy its structure and replace the content. Its coordinates, gutters, type scale, and connectors are already correct and critique-clean; editing a gold-standard board beats composing from a blank canvas.

Open only the one chosen templates/<slug>/design.md for the full palette notes. Then write the SVG in a logical coordinate space (≈1600–1700 wide), following:

• the archetype's coordinate skeleton (COMPOSITION.md) — place panels on it, don't free-float;
• the type scale (COMPOSITION.md) — every label is a <text>; size/weight come from its assigned role; never set font-family;
• the spacing grid (COMPOSITION.md) — consistent panel padding, gutters, and section gaps;
• native shapes only and every other hard rule in RULES.md.

Only the content goes on the canvas — never the prompt, the source, the style name, scope notes, or any meta/"summary of…" line. (See RULES.md "Never echo the user's instructions".) That context goes in your chat reply.

3. Render → fix correctness

First, predict defects without rendering — run the fit-check on your SVG:

node scripts/fit-check.mjs <dir>/diagram.svg   # path is relative to this skill dir

It estimates every label's width (CJK ≈ 1em, Latin ≈ 0.6em) and flags labels wider than their box, between-box labels that spill into a neighbour, and canvas bleed/clipping — the exact hand-coordinate defects that otherwise only surface mid-render. Fix every hit (widen the box, shorten the label, open the gutter), then re-run until clean.

Then follow the build/verify loop in RULES.md: render, open the PNG and look, then fix tight margins, accidental overlaps, clipping, and hand-drawn arrowheads. Edit the .svg in place with small targeted edits; batch all fixes from one view into a single pass before re-rendering. This step is about correctness, not taste — taste is the next gate.

GATE 2 · Design critique (mandatory, after correctness is clean)

Now judge it as a designer, not a linter. Open CRITIQUE.md, score the board on its five axes (hierarchy, balance, density, contrast, alignment), name the weakest one, apply that axis's fix recipe, and re-render. Repeat until no axis is failing (or two passes yield no real gain — then say what's still imperfect). A board that passes correctness but looks flat almost always fails hierarchy or balance first — start there.

For a board the user will actually ship, don't grade your own work — spawn an independent critique subagent given only the render and the rubric, prompted to be adversarial (see CRITIQUE.md §Independent review). Authorship bias is exactly what makes you rationalise a flat hierarchy.

4. Write into Feishu → view live → deliver

Write the SVG into a Feishu doc as an editable whiteboard (commands in RULES.md), then view the live board image and fix any remaining layout issues (the export is faithful for layout and fills, but not text colour — verify colour via --output_as raw or the live doc).

Deliver both: the Feishu doc link and the rendered image — and the rendered image is the local diagram.png from step 3, not the Feishu image export (that one comes back as a fixed square preview with the board floating in whitespace; it's for verifying the live board, not for sharing — see RULES.md step 4). Then tell the user they can switch to a different palette any time and you'll re-render the same composition in it — note that a palette swap keeps the composition; only the colours change.

Files

• RULES.md — medium hard rules + exact build/write/verify commands. Always read.
• COMPOSITION.md — archetype library, type scale, spacing grid, anti-cliché. The core.
• CRITIQUE.md — the post-render design rubric, per-axis fixes, and independent review.
• CATALOG.md — the palettes with vibe/formality. Pick from this table alone. Generated from templates/ — don't hand-edit.
• examples/ — gold-standard boards per archetype; start from the matching one.
• templates/<slug>/design.md — one per palette (frontmatter: mood + colours + stroke + a catalog: block); open only the chosen one. To add a palette, drop a folder with a design.md and run node scripts/build-catalog.mjs.
• templates/GENERATE.md — how to generate a fresh palette (same frontmatter shape) when no anchor fits, and how to persist it as a template.
• scripts/fit-check.mjs — pre-render text-fit / gutter / bleed predictor.
• scripts/build-catalog.mjs — regenerate CATALOG.md from templates/ (--check verifies it's current).
• scripts/preflight.sh — dependency and auth check.