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Every built-in theme ships a matching scenic backdrop that paints behind the app. Main canvas fills re-derive from the theme's solid colors at partial alpha so the interface reads as tinted glass over the scene, and nested bg-background containers stop re-painting so the glass stays one layer. Pick the scene in Settings > Appearance: Theme scene follows the active theme, a specific scene sticks across theme changes, None turns it off. Dark mode keeps the scene subtle to preserve text contrast.
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ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — This PR introduces a substantial opt-in appearance feature spanning persistent settings, global rendering rules, browser chrome synchronization, and 15 production assets. Its cross-cutting runtime effects and new product defaults require human review. You can add or adjust custom eligibility rules. Learn more. |
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Repository: pingdotgg/t3code/.coderabbit.yaml Review profile: CHILL Plan: Advanced Run ID: 📒 Files selected for processing (8)
Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThe change adds persisted background-scene and transparency settings. It synchronizes scenes with the active theme, renders translucent interface surfaces over the scene, and documents the settings. ChangesTheme background scenes
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant SettingsPanel
participant ClientSettings
participant ThemeBackgroundSync
participant useTheme
participant applyThemeBackground
participant BrowserDocument
SettingsPanel->>ClientSettings: update themeBackground or themeBackgroundTransparency
ClientSettings-->>ThemeBackgroundSync: provide setting values
ThemeBackgroundSync->>useTheme: read active theme values
ThemeBackgroundSync->>applyThemeBackground: resolve and apply scene
applyThemeBackground->>BrowserDocument: update backdrop state and CSS properties
BrowserDocument-->>BrowserDocument: render scene beneath interface surfaces
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✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 37.50% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 8 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@apps/web/src/routes/__root.tsx`:
- Around line 298-309: Update ThemeBackgroundSync to use the reactive
themeHalves value returned by useTheme instead of readThemeHalves when calling
resolveThemeHalf, and include themeHalves in the effect dependencies so scene
and tint updates rerun after setThemeHalf changes.
In `@apps/web/src/themeBackground.ts`:
- Line 71: Update applyThemeBackground so the no-url path removes the document
body’s inline background-color property before returning, while preserving the
existing behavior for valid URLs.
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apps/web/public/backgrounds/ember.webpapps/web/public/backgrounds/grove.webpapps/web/public/backgrounds/iris.webpapps/web/public/backgrounds/ocean.webpapps/web/public/backgrounds/t3-chat.webpapps/web/src/components/settings/SettingsPanels.tsxapps/web/src/components/settings/settingsSearch.tsapps/web/src/hooks/useTheme.tsapps/web/src/index.cssapps/web/src/routes/__root.tsxapps/web/src/themeBackground.test.tsapps/web/src/themeBackground.tsdocs/user/appearance.mdpackages/contracts/src/settings.test.tspackages/contracts/src/settings.ts
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…a scene turns off Review follow-up: ThemeBackgroundSync now consumes themeHalves from useTheme so swapping the light/dark half re-derives the scene and tints, and clearing a scene resets the body's inline background so the stylesheet fill takes over again.
A themeBackgroundTransparency setting (0-100%, default 20) drives the surface alpha over the scene via --backdrop-transparency, next to the scene picker in Settings > Appearance. The per-appearance dim veil stays theme-tuned so text contrast is preserved.
Review follow-up: with a scene active, chrome sync now uses the scene's solid canvas tint instead of the translucent glass fills, so the window frame and theme-color meta stay opaque and stable across scene and transparency changes.
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The scenes were regenerated against a measured framing spec: horizon at 35-45% of height so the landscape lands in the open window area, quiet left quarter behind the thread list, smooth top strip behind the toolbar, focal detail near the right margin, and quiet lower third under the composer. In-app review showed 30% transparency makes the scene clearly present without costing text readability, so the default moves from 20% to 30%.
The framing-optimized regeneration traded away the atmosphere that made the first set work; the original misty scenes win. The transparency slider stays for anyone who wants more of the scene.
Alpine, Aurora, Coastline, Dune, Fjord, Forest Lake, Highlands, Meadow, Nightfall, and Terraces join the theme-matched scenes as always-available picks, generated in the same soft, misty style as the originals. Auto still follows the active theme; picked scenes stay across theme changes.
Background scene now defaults to None so upgrading never changes how the workspace looks. With a scene on, switch thumbs, checkboxes, radios, and input-style controls keep a solid fill instead of turning see-through, browser chrome re-syncs when a scene toggles, and a duplicated --background override is gone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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A custom theme whose id matched a standalone scene (for example "alpine") picked that scene up on auto. Auto now resolves only built-in theme ids. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Problem
Themes in T3 Code only change colors. The workspace is always a flat, opaque surface. The glass utilities (
surface-glassand the glass-opacity setting) already exist, but there's nothing behind them to show through. Apps like Bambooed show that a calm scene behind a translucent interface makes long sessions feel less sterile.Change
This adds an opt-in Background scene under Settings → Appearance. When a scene is on, a fixed, dimmed image paints under every surface, and the main canvas, sidebar, and toolbar fills are rebuilt from the theme's solid colors at partial alpha. The interface reads as tinted glass over the scene.
themeBackgrounddefaults tonone, so upgrading doesn't change how anyone's workspace looks.apps/web/public/backgrounds/: 15 webp files, 23 to 125 KB each, about 870 KB in total. They're loaded only once a scene is picked.auto) follows the active built-in theme. A scene you pick directly stays put when you change themes. Custom themes onautoshow no scene, even if their id matches a standalone scene.body::before. Large surfaces get nobackdrop-filter, because one blurred layer that big repaints on every streaming frame. The scenes are softly defocused in the image itself instead.bg-backgroundcontainers stop repainting while a scene is on, so the glass stays one layer instead of stacking up to opaque. Form controls (switch thumbs, checkboxes, radios, inputs, selects, toggles) keep a solid fill so their shapes stay readable. Terminal fills stay solid. Dialogs and popovers keep their existing glass treatment.theme-colorand the window frame color) uses the solid scene tint while a scene is on and switches back when it's turned off.docs/user/appearance.mdcovers them.Desktop gets this automatically because it wraps the web client. The desktop protocol CSP already allows
img-src 'self', and the images use the same root-relative paths as the favicon. Mobile has its own theme system and is unchanged. The setting is a client setting, so mobile decodes it and ignores it.Evidence
All captures come from the candidate running in a real browser (Chrome, 1280x800), paired to an isolated dev server with a copy of real workspace data. "Before" is the candidate at its default (
None), which renders the same path asmain: with the scene off, the new code sets no attributes or styles. I didn't run a separatemainbuild.Before/after: the default workspace with no scene, then the Ocean scene at the default 20% transparency (two-frame still-state GIF).
The settings rows: the scene picker and transparency slider, with the switch thumbs, select triggers, and slider staying solid over the scene.
Worst case, 100% transparency: the theme cards and controls stay readable over the full-strength scene.
More scenes
T3 Chat theme with its matching scene:
Ember theme with its dusk scene:
Grove in dark mode, where the scene stays subtle to protect contrast:
Ocean at 60% transparency:
These four were captured on earlier heads with the same scene assets. The only later changes are the default and the control fills, neither of which touches these workspace views.
Known limits: the thread shown is an empty draft, so the captures cover the sidebar, header, composer, and settings, but not long message text over a scene. Secondary metadata (branch labels, timestamps) has less contrast with a scene on, most noticeably in Grove dark. Only the web client in Chrome was exercised. The Electron shell wasn't launched.
Verification
vp test run packages/contracts/src/settings.test.ts apps/web/src/themeBackground.test.ts apps/web/src/components/settings/settingsSearch.test.ts apps/web/src/hooks/useTheme.test.ts: 215 passed. The theme-background tests cover a custom theme id that collides with a standalone scene; the contract test now iterates everyThemeBackgroundChoiceliteral and asserts thenonedefault.pnpm --filter @t3tools/contracts typecheckandpnpm --filter @t3tools/web typecheck: clean.vp linton the touched files: no new warnings. The two in__root.tsxpredate this change.Model and harness: built with GLM (enablers/xlarge) via T3 Code / OpenCode, with Codex CLI image generation for the scenes. Reviewed and review fixes by Claude Opus 5.5 via Claude Code.
🤖 Generated with Claude Code