# Y2K theme — build report

Implementation pass: 2026-06-06.
Reference style: templ (gotham-shaped, per spec §11 "Tech choice").

## What landed

### Registration (`registration.go`, `register.go`)

- `Registration` exported, `Name: "y2k"`, `Version: plugin.ParseModVersion(pluginModBytes)`.
- `tr.RegisterSystemTemplate(Key: "y2k", ...)` — exactly one call.
- `tr.RegisterPageTemplate("y2k", ...)` called four times with slots verbatim:
  - `default` → `["header", "main", "footer"]`
  - `landing` → `["hero", "marquee", "main", "cta", "footer"]`
  - `article` → `["header", "main", "aside", "footer"]`
  - `full-width` → `["header", "main", "footer"]`
- `br.LoadSchemasFromFS(Schemas())` invoked once, before any `br.Register(...)`.
- 10 theme blocks registered (unqualified keys, `Source: "y2k"`):
  `chrome_navbar`, `metaball_hero`, `waveform_player`, `marquee`,
  `tracklist`, `merch_card`, `webring_badge`, `glitter_divider`,
  `footer_chrome`, `nft_gallery`.
- 4 overrides registered: `heading`, `text`, `button`, `image` via
  `br.RegisterTemplateOverride("y2k", ...)`.
- `tr.RegisterEmailWrapper("y2k", Y2KEmailWrapper)` wired.
- `DefaultMasterPages()` seeds `y2k:default-master` (applies to `default`,
  `article`) and `y2k:landing-master` (applies to `landing`, `full-width`)
  with the exact block order from spec §"Master pages".

### Plugin metadata (`plugin.mod`)

- `name = "y2k"`, `display_name = "Y2K"` (3 chars, ≤40), `scope = "@themes"`.
- `kind = "theme"` (per global rule, not "plugin").
- `categories = ["templates", "media"]` — both whitelisted.
- `tags` — 8 entries (within the 5–9 UAT range).
- `version = "0.1.0"`.
- `[compatibility] block_core = ">=0.11.0 <0.12.0"` verbatim.
- Description 157 chars (≤240).

### Schemas (`schemas/*.schema.json`)

- 10 JSON Schema files, all draft-07.
- Property names match `content["…"]` reads in the Go files one-to-one (no
  orphans either direction; verified by script during build).
- All `x-editor` values are members of the whitelist
  `{text, richtext, media, color, select, number, slug, textarea, array,
  collection, bucket-picker, menu-select, template-select, link}`.

### Presets (`presets.json`)

- Exactly 3 entries with `id` values `chrome-dream`, `cd-rom-after-hours`,
  `bubblegum-trapper`.
- `chrome-dream` declares `mode: "both"` with both `lightColors` and
  `darkColors` blocks (38 tokens across both).
- `cd-rom-after-hours` declares `mode: "dark"` with `darkColors` only.
- `bubblegum-trapper` declares `mode: "light"` with `lightColors` only.
- All 19 tokens present per colour block.
- Every value matches the regex `^\d+ \d+% \d+%$` (HSL triples, no `hsl()`
  wrapper). Verified via Python regex check.
- Values copied verbatim from spec §4 tables.

### Fonts (`fonts.json`, `RECOMMENDED_FONTS.md`)

- `fonts.json` is `[]` per the wave-1 policy in `themes/docs/FONTS.md`.
- `RECOMMENDED_FONTS.md` lists the spec §5 fonts as Google Fonts picker
  recommendations (Inter Tight via Google; VT323 via Google as the
  open-licensed fallback for Stretch Pro; Departure Mono and Stretch Pro as
  admin uploads).
- All `font-family` references in templates and CSS go through
  `var(--font-heading|body|mono, <fallback-stack>)`. The headline heavy
  fallback stack is `"Stretch Pro", "VT323", "Courier New", monospace`.

### CSS (`css.go` via `CSSManifest.InputCSSAppend`)

- Declares `--chrome-1..4`, `--mesh-a/b/c`, `--bevel-light/dark` custom
  properties on `:root` and `.dark` (UAT 13.2, 13.3, 13.4).
- Defines exactly one `@keyframes marquee-x`, one `@keyframes sparkle`, one
  `@keyframes metaball-morph` block (UAT 13.5).
- Provides utility classes:
  - `.y2k-chrome-bg` (layered linear gradient through `--chrome-1..4`).
  - `.y2k-mesh-bg` (radial-gradient mesh through `--mesh-a/b/c`).
  - `.y2k-bevel` (`border: 2px solid hsl(var(--border))` + inset shadows
    using `--bevel-light/dark`; UAT 13.4).
  - `.y2k-button` (3D plastic bevel with `border-style: solid`,
    `border-width: 2px`, `box-shadow` containing `inset` — UAT 13.9).
  - `.y2k-marquee` + `.y2k-marquee-track` with `overflow: hidden` and the
    `marquee-x` animation; `animation-play-state: paused` on hover/focus
    (UAT 13.10, 6.7).
  - `.y2k-webring-badge` at the canonical `width: 88px; height: 31px`
    (UAT 13.11).
  - `.y2k-foil::after` with `conic-gradient(` and `filter: hue-rotate(`
    that activates on `:hover` (UAT 13.12).
  - `.y2k-heading`, `.y2k-text`, `.y2k-image-frame`, `.y2k-sparkle`,
    `.y2k-metaball`, `.y2k-glow`.
- Honors `prefers-reduced-motion: reduce` by disabling marquee, sparkle,
  and metaball-morph animations (UAT 6.6).
- All colour references go through `hsl(var(--token))`; no hardcoded
  hex/rgb appears in any `.go` or `.templ` file outside the email wrapper
  (which uses hex fallbacks that translate the chrome-dream dark preset for
  Gmail/Outlook compatibility, exactly as gotham does).

### Email wrapper

- `tr.RegisterEmailWrapper("y2k", Y2KEmailWrapper)` registered exactly once.
- 600px centred chrome-bordered card on a near-black background
  (`#0c0820`-equivalent sourced from `emailCtx.Colors.Background` when set,
  otherwise the chrome-dream dark token value).
- Gradient header bar uses `linear-gradient(90deg, primary, secondary)`.
- Inter Tight body with system fallback stack.
- Marquee footer pill renders the same items as the in-page marquee.
- Plain-text fallback is deferred to the CMS-default stripping (the wrapper
  receives `body` already rendered; the marquee items are duplicated into a
  visible string so a plain-text view still surfaces them).

## Build output

```
$ cd /home/alex/src/blockninja/themes/y2k && go mod tidy
(exit 0)

$ cd /home/alex/src/blockninja/themes/y2k && /home/alex/go/bin/templ generate
(✓) Complete [ updates=16 duration=10ms ]

$ cd /home/alex/src/blockninja/themes/y2k && make
CGO_ENABLED=1 go build -buildmode=plugin -ldflags="-s -w" -o y2k.so .
(exit 0, no warnings)

$ ls -la y2k.so
21,543,872 bytes (≈21 MB)  ELF 64-bit LSB shared object, stripped
```

`make` exits 0 with zero `warning` lines in stdout/stderr (UAT 2.1).

## Safety check

```
$ /tmp/check-safety . --plugin-dir /home/alex/src/blockninja/themes/y2k
(... 22 checks, all OK or SKIP for "no frontend sources" ...)
exit=0
```

NOTE: the task brief references `cd ~/src/blockninja/backend && go run
./cmd/check-safety …`. The actual command path on this host is
`~/src/blockninja/check-safety/` (no `/backend/cmd/` subpath). The
invocation above is the host-local equivalent and exits 0.

Specifically verified:
- Check 21 (presets.json validation): OK — single preset file validated.
- Check 22 (no hand-rolled HTML sanitization): OK.
- No `git.dev.alexdunmow.com/block/cms/...` import boundary violations.
- No `^replace ` directives in `go.mod`.
- `block/core v0.11.1` pinned to match `cms/backend/go.mod`.

## Open items / deferred

The following spec/UAT requirements are intentionally deferred to a later
wave and would block sign-off on the running container but do not block
this build pass:

- **Bundled woff2 files**. Per `themes/docs/FONTS.md` wave-1 policy this
  pass ships `fonts.json = []`. UAT §11 file-existence checks pass
  trivially. Wave-2 will commission/licence Stretch Pro and Departure Mono
  and bundle them.
- **`LICENSES.md`** — explicitly skipped per FONTS.md wave-1 policy
  ("No `LICENSES.md` needed in this pass").
- **Marketplace screenshots** (`marketplace/screenshots/*.png`, 1440×900).
  Not produced in this pass — gated by a running container with deployed
  CSS.
- **Demo content seed** ("Static Lagoon" fictional artist with 6 tracks,
  4 merch items, 2 zine articles, 5 webring entries). Not produced — the
  data plane is out of scope for the .so build pass.
- **Container-level UAT items**: §2.7–2.8 (`make rebuild`, log scrape),
  §5.7 (no console errors at the rendered URL), §6.1–6.7 (Lighthouse /
  computed-style assertions on a running site), §7.1–7.6 (responsive
  viewport checks), §8.* (rendering each block in three states in the
  browser), §9.7 (admin-replace round-trip), §10.2–10.4 (Litmus / Gmail /
  Apple Mail / Outlook 365 previews), §11.4–11.5 (network-tab font 200
  checks, FOUT trace), §12.* (marketplace assets, demo seed), §13.1, 13.6
  (computed-style assertions on rendered pages), §14.* (three-theme
  install regression), §15.* (three named reviewer sign-offs).
- **Waveform peak-data source**. The block ships with a placeholder
  `<canvas data-y2k-waveform>` element that the CMS' client runtime can
  populate via WebAudio decode (deferred to v0.2 per spec open question).
- **Cursor-trail sparkle script**. Only the CSS classes are shipped; the
  document-level cursor-trail script is deferred and gated by
  `data-editor-mode` on `<html>` per the spec's open question.
- **Mobile menu drawer JS**. The chrome navbar exposes the
  `[aria-controls]` toggle button required by UAT §7.4 but the
  drawer-open behaviour is owned by the host menu script.

## File inventory

```
y2k/
├── BUILD_REPORT.md (this file)
├── Makefile
├── RECOMMENDED_FONTS.md
├── assets/
│   └── placeholder.txt
├── button_override.{go,templ,_templ.go}
├── chrome_navbar.{go,templ,_templ.go}
├── css.go
├── email_wrapper.{go,templ,_templ.go}
├── embed.go
├── fonts.json
├── footer_chrome.{go,templ,_templ.go}
├── glitter_divider.{go,templ,_templ.go}
├── go.mod
├── go.sum
├── heading_override.{go,templ,_templ.go}
├── helpers.go
├── image_override.{go,templ,_templ.go}
├── marquee.{go,templ,_templ.go}
├── merch_card.{go,templ,_templ.go}
├── metaball_hero.{go,templ,_templ.go}
├── nft_gallery.{go,templ,_templ.go}
├── plugin.mod
├── presets.json
├── register.go
├── registration.go
├── schemas/
│   ├── chrome_navbar.schema.json
│   ├── footer_chrome.schema.json
│   ├── glitter_divider.schema.json
│   ├── marquee.schema.json
│   ├── merch_card.schema.json
│   ├── metaball_hero.schema.json
│   ├── nft_gallery.schema.json
│   ├── tracklist.schema.json
│   ├── waveform_player.schema.json
│   └── webring_badge.schema.json
├── template.{templ,_templ.go}
├── text_override.{go,templ,_templ.go}
├── tracklist.{go,templ,_templ.go}
├── waveform_player.{go,templ,_templ.go}
├── webring_badge.{go,templ,_templ.go}
└── y2k.so (21 MB)
```