/genjutsu:caston a starting fixture

The four firings, pinned to the scroll

Screen recording: the page scrolls into a pinned section titled The four firings; a line draws a firing curve with two peaks while the stage card below changes from Drying to Bisque firing, Glaze firing and Cooling. — clip · 1440×900The Atelier Grès page and its copy are the starting fixture: the four firing stages were four static blocks, with GSAP installed and unused. The pinned section and the firing curve are the run's work: the scroll draws the studio's firing curve as one line, and each stage's text takes over from the one before as the line reaches it. 1440x900 viewport, scaled to 1200 wide.

the request

/genjutsu:cast pin our pottery studio's four firing stages and scrub them with the scroll

Atelier Grès is a fictional pottery studio, made up for this example.

Nobody is available to answer questions during this session. Up-front answers to the gates:
- Preview mode: A. Write each preview as a standalone HTML file under preview/ in the project.
- Scope: the firing stages section. You may edit files under src/ and index.html, and write previews under preview/; create nothing outside the project.
- Dependencies are installed (node_modules is present) and `npm run build` works. There is no network: install nothing. Do not start a dev server.

Finish with the final report the pipeline asks for.

how it was made

genjutsu: 4.1.0 at 09c177b
model: claude-opus-5-5
run: One-shot, headless
harness: claude plugin eval, Claude Code 2.1.289
selection: First pass, the only run recorded
cost: $1.53, 23 turns
date: 4 October 2026
scope: /genjutsu:cast, on a starting fixture
modules: motion-principles, gsap, tells, mobile-principles

No transcript: a headless run has no conversation. The request is everything it was told.

What to know about this run

First pass: one run recorded, and this is it. Built as the run left it, with no human edits.
The run had no Node runtime in its sandbox, so it could not build or open a browser: it checked the types by hand and listed the build and the browser checks as unverified. The build passed afterwards on the first try.
Its thesis is marked UNVALIDATED in its own report: the run was headless, so nobody was there to say yes.
Its own audit: 10 checked, 2 problems found (1 from this run, 1 already in the project), 3 handed over. The tells audit: 18 checks, 0 findings.
The harness graders scored the case 0.33: the skill came in through the slash command rather than a Skill tool call, so two of the three graders saw it as not loaded. The trace shows the skill's setup script and module loader running.

Stills

Taken from the same build as the clip and described by the receipt. Re-encoded as WebP at their captured size; each opens full size.

The pinned section mid-scrub: the curve drawn past its first peak, the Glaze firing card showing. — 1440×900Desktop, the pinned section mid-scrub, on the glaze firing.

The section with reduced motion: no pin, the whole curve drawn, the four stages as a list. — 1440×900prefers-reduced-motion: reduce. No pin, the full curve drawn, the four stages as a static list.

The thesis page the run wrote, with the thesis text and a framed preview of the section. — 1440×900preview/thesis.html, the thesis page the run wrote before touching src/, its inner frame scrolled to 62%. In this preview the stage text sits on top of the Drying label during the scrub; the built page does not do it.

Three variants side by side, labelled A, B and C. — 1440×900preview/variants.html, variants A, B and C side by side. The run picked A; B and C add a dot and a temperature readout it rejected as invented data.

The first screen of the Atelier Grès page. — 1440×900Desktop, first screen.

The pinned section on a phone, the Glaze firing card fitting the screen. — 390×844 @2xPhone, the pinned section mid-scrub. The run handed this check over as unverified: the card fits, and nothing scrolls sideways.

The first screen of the Atelier Grès page on a phone. — 390×844 @2xPhone, first screen.

The receipt

Written when the run was recorded and shown here as written. File names in it point at the recording workspace; the stills above are the same images. The raw record is receipt.json.

/genjutsu:cast on a one-page site for Atelier Grès, a fictional pottery studio: pin the four firing stages and scrub them with the scroll. React 19 + Vite + TypeScript, GSAP 3 ScrollTrigger (template react-gsap).

The prompt

/genjutsu:cast pin our pottery studio’s four firing stages and scrub them with the scroll

Atelier Grès is a fictional pottery studio, made up for this example.

Nobody is available to answer questions during this session. Up-front answers to the gates:

Preview mode: A. Write each preview as a standalone HTML file under preview/ in the project.

Scope: the firing stages section. You may edit files under src/ and index.html, and write previews under preview/; create nothing outside the project.

Dependencies are installed (node_modules is present) and npm run build works. There is no network: install nothing. Do not start a dev server.

Finish with the final report the pipeline asks for.

The run


genjutsu	4.1.0 at commit `09c177b`
Model	`claude-opus-5-5`
Harness	`claude plugin eval`, Claude Code 2.1.289, headless: nobody answered the gates
Date	2026-10-04
Cost	$1.53
Turns	23
Duration	333 s
Selection	first pass (1 run recorded)
Human edits	0 (builds as the run left it)

Modules loaded (from its load_skill calls): motion-principles, gsap, tells, mobile-principles; reference tells/references/web.md; script design-audit/scripts/audit.py --group tells.

The cast skill itself came in through the /genjutsu:cast slash command, not a Skill tool call, so the harness graders cast-fired and cast-loaded scored it as not loaded (case score 0.33). The trace shows the skill’s own setup script and module loader running.

What it proposed

Marked UNVALIDATED in its own report (headless run, nobody to confirm the thesis).

Interaction thesis:

The firing stages section pins for 300% of the viewport height. A GSAP ScrollTrigger scrub (scrub: 0.6, timeline ease: "none") draws the studio’s own firing curve as one SVG line: room temperature, up to 950 °C, back down, up to 1280 °C, then a slow fall. As the line crosses into each stage’s segment, that stage’s text takes over from the previous one: out over 0.2 of a stage (opacity → 0, y → −24px, power2.in), then in over 0.2 of a stage (opacity 0 → 1, y 24 → 0, power2.out). With reduced motion, or on a viewport under 560px tall, it stays the static list with the full curve drawn.

Allowed patterns:

the pinned section, a schematic line chart (temperature vs. stage, not to scale in time).

It showed before it wrote: preview/thesis.html and preview/variants.html, then picked A (subtle). B and C add a dot and a temperature readout the run rejected as invented data.

Audit (its own)

Audit: 10 checked, 2 problems found (1 in this run, 1 already in the project), 3 handed over

Tells: audit.py –group tells: 18 checked, 0 findings, 0 tells to confront.

The run could not build or open a browser (no Node runtime in the sandbox); it checked types by hand and listed npm run build and browser checks as UNVERIFIED.

Build

npm run build succeeded on the first try with node_modules copied from the template. Human edits: 0, no edits.diff.

Media

File	What	Viewport
`media/clip.webp`	Scroll from just above ‘The four firings’ through the whole pinned, scrubbed section: all four stages play, the firing curve draws	1440x900
`media/desktop.png`	Desktop first screen	1440x900
`media/mobile.png`	Mobile first screen	390x844 @2x
`media/mid-page.png`	Desktop, pinned section mid-scrub (glaze firing)	1440x900
`media/mobile-pinned.png`	Mobile, pinned section mid-scrub (glaze firing); the run handed this check over as UNVERIFIED: the card fits, no horizontal scroll	390x844 @2x
`media/reduced-motion.png`	prefers-reduced-motion: reduce; no pin, full curve drawn, static list	1440x900
`media/preview.png`	preview/thesis.html, the thesis page the run wrote before touching src/ (inner frame scrolled to 62%)	1440x900
`media/preview-variants.png`	preview/variants.html, variants A, B, C side by side (inner frames scrolled to 62%)	1440x900

Notes:

Captured with bin/record.mjs: the static build served from disk over CDP, no server, virtual time. Takes are in takes/.
No console errors, uncaught exceptions or failed requests in any take.
In preview/thesis.html, during the scrub the stage text sits on top of the ‘Drying’ label under the curve (visible in preview.png). That is the preview as written; the built page does not do it.