[nwparker]

	Files	Added	Deleted	Net
Test	0	0	0	0
Prod	3	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​62	$\color{#cf222e}{\Huge{\mathbf{−}}}$​17	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​45

Summary

This adds an opt-in ORCA_DEV_BUNDLED=1 setting for pnpm dev. It runs the renderer in Vite's experimental bundled dev mode (experimental.bundledDev, available in the installed Vite 8.3.4). In this mode the renderer loads as a few bundled chunks instead of ~2–3k separate module requests. It is off by default, so normal pnpm dev is unchanged.

• config/build-plugins/renderer-bundled-dev.ts: when the variable is set, enables experimental.bundledDev on the renderer config and sets build.rollupOptions.output.strictExecutionOrder: true.
• config/build-plugins/dev-serve-config.ts: applies it on the serve path only. Production builds are unaffected.
• .github/CONTRIBUTING.md: how to use it, plus known caveats.

Why strictExecutionOrder

If you enable bundled dev alone, the renderer never mounts. It throws @vitejs/plugin-react can't detect preamble. The React Refresh preamble is inlined into the index entry chunk, but the four HTML entries (index, popout, space, web) share chunks, and those chunks run before the entry's preamble. Strict execution order keeps the original module order, and the app renders normally.

Measurements

How it was measured: full Electron dev app, launched in the background with ORCA_BACKGROUND_LAUNCH=1, a fresh profile each run, and timing over CDP. "Ready" means workspaceSessionReady plus a rendered #root. The timer starts when Electron's renderer target appears, which excludes the main/preload build that is the same in both modes. The machine was heavily loaded (load average 35–60), so the numbers are noisy. Medians of 4 interleaved warm runs:

	Default dev	ORCA_DEV_BUNDLED=1
Renderer start to first full render (warm cache)	10.9 s	3.5 s
Same, cold (renderer cache deleted)	24.3 s	4.1 s
In-page time to first render (performance.now())	10.8 s	1.6 s
Full reload (wall)	3.1 s	2.6 s
Full reload (in-page)	3.1 s	1.4 s
Resource requests on load	250+ (buffer full)	~25

In bundled mode the first reload after start takes ~3.5 s, because the server regenerates the bundle. Later reloads take 0.5–0.7 s.

Validation in bundled mode

• HMR: a TSX edit (Landing.tsx) updated the DOM in 0.9–1.8 s and kept window state (no full reload). A main.css edit applied in 1.7–3.1 s and also kept state. Default mode took 2.2–3.2 s and 4.3–4.8 s for the same edits.
• Plugins:
  • React + Fast Refresh: works with the fix above.
  • Tailwind: CSS renders and hot-updates.
  • pdfjs viewer asset middleware: standard_fonts returns 200.
  • Markdown parser aliases: markdown renders in the rich editor.
  • Cache-retention plugin: starts and stops cleanly.
• Workers: Monaco opened a .ts file, and editor.worker and ts.worker loaded.
• Other entries: popout.html, space.html, and web-index.html serve their bundled entries with 200.
• Screenshots taken over CDP from the hidden window show the full app shell, Monaco, and the markdown editor rendering normally.
• No console errors or page errors in any run.

Known caveats (documented in CONTRIBUTING)

• Experimental. Each edit rebuilds the affected chunks.
• While a rebuild is pending, newly requested HTML for the pop-out, space, or web windows may be placeholder HTML until the bundle is ready.

Checks

• pnpm tc passes.
• pnpm run check:code-quality:changed passes.
• oxlint is clean on the changed files.
• oxfmt is clean.

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Reviewing files that changed from the base of the PR and between b1e18d8 and 61cac20.

Files selected for processing: 3

• .github/CONTRIBUTING.md
• config/build-plugins/dev-serve-config.ts
• config/build-plugins/renderer-bundled-dev.ts

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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