Build a brand-locked, animated single-page microsite (locked to YOUR palette - the shipped tokens are a swappable default) - a self-contained scrolling HTML page that presents any topic or dataset as a visual story with text, diagrams, charts, KPI strips, and canvas animation, plus optional print-stylesheet PDF export. The web-native sibling of /one-pager (dense PDF page) and /presentation (slide deck) - the mother skill for "make me a nice web page about X". Use for daily/status reports as web pages, topic explainers, workshop pages, project/product showcases, briefing sites. Composes /explain-visually thinking, /create-explanatory-image, /animated-explainer, and the dataviz method behind one consistent UI. Use when someone wants an animated report, a scrolling explainer page, a workshop microsite, or "present this beautifully in the browser".
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Build a brand-locked, animated single-page microsite (locked to YOUR palette - the shipped tokens are a swappable default) - a self-contained scrolling HTML page that presents any topic or dataset as a visual story with text, diagrams, charts, KPI strips, and canvas animation, plus optional print-stylesheet PDF export. The web-native sibling of /one-pager (dense PDF page) and /presentation (slide deck) - the mother skill for "make me a nice web page about X". Use for daily/status reports as web pages, topic explainers, workshop pages, project/product showcases, briefing sites. Composes /explain-visually thinking, /create-explanatory-image, /animated-explainer, and the dataviz method behind one consistent UI. Use when someone wants an animated report, a scrolling explainer page, a workshop microsite, or "present this beautifully in the browser".
category
visual-communication
automation
gated
argument-hint
<source material or path> [--preset report|explainer|showcase] [--theme dark|light] [--autonomous] [--pdf] [--inline] [--share] [--output-dir PATH]
{"version":"1.5","created":"2026-07-29T00:00:00.000Z","author":"Ability.ai","changelog":["1.5: Promoted to the public trinity-skills library — brand-neutralized (page_templates.md §0 makes the palette a swappable DEFAULT and defers to the consuming workspace's own design doc; the discipline rules stay locked), --share made headless-capable via VERCEL_TOKEN, Drive delivery removed, skill-relative script paths, sibling-skill references made optional, declared requires:/argument-hint + cold-start behavior","1.4: Print trap - .count spans print as $0 (observer-gated); every count-up needs a print-only .pn twin with the final value (recipe in page_templates.md §7)","1.3: Canvas trap documented in page_templates.md §6 - absolutely-positioned canvas needs explicit width/height:100% (replaced element stays at intrinsic 300x150 under inset:0 alone; symptom: drawing huddles top-left)","1.2: --share hardened to PRIVATE-share semantics (operator directive) - unguessable URLs (96-bit secrets token in the project name, wildcard cert so the hostname stays out of CT logs) + non-indexable (X-Robots-Tag noindex/nofollow/noarchive via staged vercel.json AND meta robots injected into the staged copy; local file untouched); scope auto-resolution for non-interactive CLI; robust URL parse","1.1: --share flag - post-approval publish to Vercel as a unique shareable URL (scripts/share_vercel.py; project-per-share microsite-{slug}-{id}; production deploy so no Vercel preview-auth wall; page stays up until removed - removal one-liner reported; requires authenticated Vercel CLI)","1.0: Initial version - shell + section grammar + animation rig distilled from a workshop explainer page, tokens reconciled with a locked design system (3 documented web-tier deviations), two-gate flow mirroring the one-page sibling, --autonomous mode for scheduled report runs, check_page.py verification rig + export_pdf.py print-stylesheet PDF"]}
Microsite
ℹ️ First, set expectations: before anything else, print one short line with this skill's version and its most recent change - the top entry of metadata.changelog above - e.g. microsite vX.Y - recent: <summary>. Then proceed.
ultrathink
Purpose
Turn any topic or dataset into a brand-locked, animated, self-contained web page - a
scrolling visual story with a hero, KPI strips, diagrams, charts, timelines, and canvas
animation, all on one consistent UI defined in page_templates.md. The deliverable is an
HTML file (plus assets/) that opens in a browser; a print-stylesheet PDF is an
optional companion, never the point.
This is the web-native tier of the family:
Skill
Medium
Density
Deliverable
/one-pager †
one fixed page
maximal
1-page PDF
/presentation †
slides
one idea/slide
multi-page PDF
/explain-visually †
one bundled page
diagram-heavy
1-page PDF
/animated-explainer
canvas film
one mechanism
live film / MP4
/microsite
scrolling page
one section/idea
HTML in the browser (+ PDF)
† separate skills that may not be installed in your workspace. This skill never requires
them — it degrades to authoring the section itself. Only /animated-explainer and the
imagery skills below are true optional collaborators.
When to use
Right tool when:
"Make me a nice web page about X" / "present this beautifully" / an animated report
A daily/status report that should be read, not just filed (KPIs, findings, actions)
A topic explainer or workshop page (the canonical exemplar this shell was distilled from)
A project/product showcase with narrative + screenshots + proof
The content has 5+ distinct facets that deserve their own scroll sections
Wrong tool when:
The deliverable must be a PDF/print artifact → a one-page or deck skill (this one's --pdf is a companion, not the point)
One mechanism needs a time-based film with narration → /animated-explainer (this skill embeds or links its output for a single animated section)
One diagram or image → /create-explanatory-image or a diagram skill
A real multi-page website with routing/deploy → a site-scaffolding skill or the site's own agent
Research is needed first - this skill presents material it's given; it does NOT research
page_templates.md §0 (defaults) and the workspace's own design doc if it has one — that doc wins
✅
❌
Chart method
a dataviz-style chart skill, if installed
✅ when a section charts data
❌
Verification rig
scripts/check_page.py
run
❌
PDF export
scripts/export_pdf.py
run
❌
Vercel share deploy
scripts/share_vercel.py (needs VERCEL_TOKEN)
run when --share
❌
The page + assets
{output-dir}/{slug}.html + assets/
✅
✅
Locked content record
{output-dir}/source.md
✅
✅
Composes
Skill
When
/create-explanatory-image
A section needs a conceptual illustration (iterates to correctness)
/nano-banana-image-generator
A section needs a plain soft-futurism hero/media image
/animated-explainer
A section deserves a full data-driven film (embed or link its output)
Invoke children by name (unversioned); never inline their steps or call their internal
scripts directly.
Prerequisites & cold start
Script paths below are relative to this skill's directory - run them from there, or
prefix with the directory the skill was injected into.
Requirement
Needed for
Missing →
python3 + Playwright/Chromium
Step 7 verification, Step 9 PDF
Report the install command (pip install playwright && playwright install chromium); never claim verification that didn't run.
GEMINI_API_KEY (fallback GOOGLE_API_KEY)
generated imagery only
Not fatal - build the page imagery-free (the grammar degrades gracefully) and say so in the delivery report. Imagery-free runs cost $0.
VERCEL_TOKEN
--share only
Fail that step naming the key (VERCEL_TOKEN not set - add it to this agent's credentials); the local page is still THE deliverable. An interactively-logged-in Vercel CLI also works for a human at a terminal, but a headless agent needs the token.
The material: a brief, file path(s), session data, pasted notes, or "what we just discussed". This skill distills; it never invents facts. A bare topic with no substance halts with a request for raw material.
dark = the near-black canvas of the default palette. light = warm-paper variant (data-theme="light"). Print always renders light. Both palettes are swappable per page_templates.md §0.
--autonomous
(off)
Skip both approval gates for scheduled/headless runs (e.g. a daily report). [NEEDS:] facts are omitted (never guessed) and listed in the final report.
--pdf
(off)
Also export the print-stylesheet PDF companion.
--inline
(off)
Single-file build: base64-embed images within the 1.5MB budget (page_templates.md §8). Default is a sibling assets/ folder.
--share
(off)
After Gate 2 approval, publish the page to Vercel as a private share link via scripts/share_vercel.py: a throwaway project per share named ms-{24 hex chars} - hard to guess (96 random bits, no content hint in the hostname; kept short because Vercel truncates long names in the URL, which would cut the entropy; wildcard *.vercel.app cert keeps the hostname out of certificate-transparency logs) and non-indexable (X-Robots-Tag: noindex, nofollow, noarchive header + injected meta robots, local file untouched). Reachable only by people given the link. Production deploy (Vercel's preview URLs sit behind an auth wall that would block recipients). The page does NOT auto-expire; "temporary" = removable with the reported one-liner (echo y | vercel project rm <project>). Requires the Vercel CLI plus VERCEL_TOKEN (or an interactively logged-in CLI). Can also be requested at Gate 2 without the flag.
--output-dir
see below
Where the page lands. Default: session-files/{YYYY-MM-DD}_{slug}_microsite/ if the workspace has a session-files/ convention, else ./microsite_{slug}/. Never a scratchpad - the page is a durable deliverable.
Process (transactional)
ultrathink - the reasoning-heavy steps are the content architecture (Step 3: what earns a
section, what carries each one) and reconciling real data with the story (no invented
numbers, unfinished parts shown unfinished).
Step 1: Read state
Read page_templates.md fully - §0 brand override first, then tokens, section
grammar, animation vocabulary, print rules, asset policy. The shell is forked, never
re-invented.
Resolve the brand: if the workspace has its own design/brand document, port its tokens
into §2 and let it override every default. Otherwise ship the defaults.
If any section will chart real data, load a dataviz-style chart skill if one is
installed before writing chart code; otherwise follow §5 S10.
If imagery will be generated, follow the imagery rules in §5 S11 and §8.
Step 2: Classify the source + resolve flags
Derive {slug}; resolve --preset (infer from intent: recurring data snapshot →
report; teaching a topic → explainer; selling/presenting a thing → showcase),
--theme, --output-dir.
Classify the source: substantive material (proceed) vs bare topic (halt and ask for
the raw material - facts, numbers, structure. Never fabricate. In --autonomous
mode, a bare-topic source is a failed run: report it, produce nothing).
Interrogate any data before designing the story (inherited from
/animated-explainer): check what the numbers actually support; a trend that's noise
or a sampling artifact doesn't get a section.
Step 3: Content architecture
Plan the page as an ordered list of sections from the grammar (page_templates.md §5):
for each - id, section type (S1-S13), the one idea it carries, the content
(telegraphic), the visual (inline SVG diagram / chart / media / canvas), and the
animation notes (what reveals, what counts, what draws in). Decide whether the page
needs semantic concept colors (≥3 recurring concepts) or stays red+grayscale.
Mark every fact the source doesn't supply as [NEEDS: ...]. Keep 6-10 sections; if the
plan exceeds that, cut the weakest - a microsite that scrolls forever is a document that
should have been a /one-pager.
Step 4: [APPROVAL GATE 1 - PLAN + CONTENT] (skipped with --autonomous)
Present the full section plan as markdown - reading order, each section's type, content,
visual, and animation - with [NEEDS:] gaps surfaced prominently. Ask via
AskUserQuestion: approve / edit sections / cancel. Nothing renders and no imagery
spends until approved. Write the locked plan to {output-dir}/source.md.
In --autonomous mode: drop [NEEDS:] items from the page, log them for the final
report, and proceed.
Step 5: Build the visuals
Per the plan, in this order (cheap before costly):
Inline SVG diagrams - hand-authored per the §5 S9 recipe (or pre-rendered themed
Mermaid SVG, inlined).
Charts - inline SVG per the chart method (§5 S10); real data only.
Canvas inserts - per the §6 canvas rig (DPR cap, reduced-motion static frame,
visibility-gated rAF). A section needing a narrated film → invoke /animated-explainer.
Generated imagery - invoke /create-explanatory-image (conceptual) or
/nano-banana-image-generator (scene); textless, film-matte-cropped; save to assets/.
Step 6: Author the page
Fork the shell skeleton from page_templates.md §4 into {output-dir}/{slug}.html:
tokens + type tier + shell CSS + only the section CSS the plan uses + the §6 interaction
rig + the §7 print stylesheet (required even without --pdf). Nav links for every
section. Footer stamps the data/canon date. Honor the asset policy (§8).
Exit 0 = clean; exit 3 = issues in the JSON report (console errors, horizontal overflow,
broken images). Fix and re-run until clean. Then look at every section screenshot
(the rig saves them to {output-dir}/checks/) with the Read tool - the script catches
mechanical breakage; only eyes catch a cramped grid, an unreadable chart, a hero scrim
that kills the canvas. Also re-check at mobile width:
check_page.py {slug}.html --width 390 --no-shots.
Step 8: [APPROVAL GATE 2 - VISUAL] (skipped with --autonomous)
Open the page for the operator (open {output-dir}/{slug}.html) and ask via AskUserQuestion:
approve / fix a section / regenerate an image / switch theme / share a link / cancel. Loop
through Steps 5-7 for fixes. No PDF export, Drive upload, Vercel share, or "done" claim
until approved.
Print stylesheet renders the light theme, reveals everything, freezes canvases at their
final frame. Skim the PDF - it's a companion, but a broken companion still ships your name.
Step 10: Deliver + persist
Report the page path (THE deliverable), the checks/ screenshots, the PDF if built.
Open the output dir in the OS file browser if the workspace has that convention; open the
page in the browser if not already done at Gate 2.
Keep the full output dir (HTML, assets/, source.md, checks/) as the reproducible record.
If --share (or asked at Gate 2): AFTER approval, run
python3 scripts/share_vercel.py {output-dir}/{slug}.html
it stages index.html + assets/, injects the noindex meta + vercel.json
X-Robots-Tag header, and deploys a throwaway Vercel project with an unguessable
96-bit name (ms-{24 hex} - private share: only people given the link can find
it; no search indexing; no content hint in the hostname). Verify the header landed
(curl -sI <url> | grep -i x-robots-tag). Report the share URL and the removal
one-liner from the script's JSON (echo y | vercel project rm <project>) - the
page stays up until removed. Never share an unapproved page; in --autonomous mode
share only when the flag was explicitly passed, and include the URL in the final
report.
If the run produced a surfaceable result on a schedule (autonomous report mode) and
mcp__trinity__report is available, publish a short report
(report_type: microsite.build, markdown display hint: page path + sections +
omitted [NEEDS:] list). Skip silently when the tool is absent.
Completion Checklist
Source was substantive; zero invented facts; [NEEDS:] gaps resolved (gated) or omitted + reported (autonomous)
Data interrogated - no section animates a number the data doesn't support
Section plan fits the grammar; 6-10 sections; semantic colors only if ≥3 bound concepts
Gate 1 approved (or --autonomous); source.md written
Page authored from the shared shell - not a bespoke shell; brand resolved per §0
(workspace design doc if present, defaults otherwise)
check_page.py exit 0 at 1440 AND 390 widths; every section screenshot eyeballed
Reduced-motion + print stylesheet present; page reads correctly with animation off
Delivered: page opened, folder opened, paths reported; PDF built if requested; footer stamps the data date
If shared: deploy ran only after approval; share URL AND removal command reported
Error Recovery
Failure
Recovery
Bare topic, no substance
Halt and ask (gated) / fail the run with a clear report (autonomous). NEVER pad with invented content.
Image generation fails
Retry once; then ship the section imagery-free (the grammar degrades gracefully) and note it. Never block the page on a picture.
Playwright/Chromium missing
Report install command; do not claim verification that didn't run.
check_page.py won't go clean
Fix the page, not the checker. Horizontal overflow = wide content escaping its scroll container (§9); console errors usually = the interaction rig referencing a section id that doesn't exist.
Canvas insert misbehaves
Its reduced-motion static frame is the fallback: gate the rAF loop off and ship the still. A canvas is never allowed to break the page.
PDF looks wrong
Fix the print stylesheet (§7), re-export. Don't hand-edit the PDF; don't let PDF needs distort the web page - the page is primary.
--inline exceeds budget
Switch to assets/ folder layout and say so.
Vercel share deploy fails
Check VERCEL_TOKEN (or vercel whoami) and the CLI install; retry once. The local page is still THE deliverable - report it delivered and the share as failed with the fix. Never block delivery on the share.
Related skills
/animated-explainer - the film tier; this skill embeds its output for animated sections
/create-explanatory-image, /nano-banana-image-generator - the imagery collaborators
Optional, if installed: one-page/deck/diagram siblings for print-native deliverables, and
a dataviz-style chart skill for S10 sections
Self-Improvement
After completing this skill's primary task, consider tactical improvements:
New trap or recipe found? A layout/animation/print bug that cost real time goes
into page_templates.md (recipe) or this file's Error Recovery (trap), symptom-first
Scope check: tactical/execution changes only - NOT core purpose
Apply improvement: edit SKILL.md / page_templates.md; bump metadata.version
and prepend a changelog entry
Version control (if in a git repository): git add the skill dir, commit as
refactor(microsite): <brief improvement>
