fix: pass theme to register_formatters in pyodide and script runner

[mscolnick]

Both call sites had user config in scope (or via context) but were
defaulting formatters to the light theme.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	May 15, 2026 1:27am

[Copilot]

Pull request overview

Passes the user-configured display theme to register_formatters in the script runner and the Pyodide kernel launcher, which were previously defaulting to the light theme despite having access to the user config.

Changes:

• In script_runner.run, read marimo_config["display"]["theme"] from the runtime context and pass it to register_formatters.
• In _launch_pyodide_kernel, pass user_config["display"]["theme"] to register_formatters.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
marimo/_runtime/app/script_runner.py	Resolves theme from runtime context and forwards it to register_formatters.
marimo/_pyodide/pyodide_session.py	Forwards the launcher's user_config theme to register_formatters.

[cubic-dev-ai]

No issues found across 2 files

Architecture diagram

sequenceDiagram
    participant Pyodide as Pyodide Session
    participant ScriptRunner as Script Runner
    participant Context as Runtime Context
    participant Formatter as register_formatters()
    
    Note over Pyodide,Formatter: Two call sites now pass theme parameter
    
    Pyodide->>Formatter: register_formatters(theme=user_config["display"]["theme"])
    Note over Pyodide,Formatter: Direct user_config access (pyodide scope)
    
    ScriptRunner->>Context: get_context()
    Context-->>ScriptRunner: Runtime context with marimo_config
    ScriptRunner->>Formatter: register_formatters(theme=get_context().marimo_config["display"]["theme"])
    Note over ScriptRunner,Formatter: Retrieves theme from runtime context
    
    alt Theme = "dark"
        Formatter->>Formatter: Configure dark mode formatters
    else Theme = "light" (default)
        Formatter->>Formatter: Configure light mode formatters
    end

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[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.23.7-dev30