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Launch the editor with one command: 
resumelang serve
# → http://127.0.0.1:5500
It is a static-served HTML/JS app with a Go file server in front. No build step, no Node, no internet required. Same Handlebars templates as the CLI, so the preview is bit-exact with what resumelang build produces.

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Layout

  • Left pane — CodeMirror 5 with YAML syntax highlighting, line numbers, and Save → localStorage. Drafts survive a tab close.
  • Right pane — sandboxed iframe with the rendered resume. Switches between light/dark CodeMirror automatically based on the resume theme background.
  • Splitter — drag the seam to resize. Position is persisted per browser.

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Toolbar

ControlWhat it does
ThemeLive-swap between installed themes. Re-render is instant.
Print / PDFOpens the system print dialog → Save as PDF.
DownloadExports a single self-contained resume.html with theme CSS inlined.
Sign inOptional — links to OAuth login (see below).

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Sign in (optional)

The editor works fully offline; sign-in is only needed for publishing to a GitHub repo or importing from LinkedIn. Set these env vars before launching the server to enable each provider: 
export RL_GITHUB_CLIENT_ID=...
export RL_GITHUB_CLIENT_SECRET=...
export RL_LINKEDIN_CLIENT_ID=...
export RL_LINKEDIN_CLIENT_SECRET=...
export RL_AUTH_SECRET=$(openssl rand -hex 32)   # session cookie HMAC

resumelang serve
Without those vars set, the Sign in button is hidden and the editor stays in offline-only mode.

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Storage

KeyContents
resumelang.yamlCurrent YAML draft. Survives reloads and tab closes.
resumelang.themeLast-selected theme name.
resumelang.splitSplitter position.
Clear the keys in DevTools → Application → Local Storage to reset.

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Hosting your own

The same binary that powers the CLI runs the editor — no separate process. Put it behind any reverse proxy: 
resumelang serve --addr 0.0.0.0 --port 8080
The web/ folder is the only thing the server reads from disk; everything else (themes, schema) is loaded from working directory at request time.