Playground editor fails to load: duplicate @codemirror/state versions from esm.sh

[Mossaka]

Bug

The gh-aw Playground editor fails to initialize the CodeMirror editors. The page loads but shows "Loading..." indefinitely with no editor content.

Console Error

Unrecognized extension value in extension set ([object Object]).
This sometimes happens because multiple instances of @codemirror/state are loaded, breaking instanceof checks.

at editor.js:119 (new EditorView({...}))

Root Cause

docs/public/editor/editor.js pins specific old versions of CodeMirror packages:

import { EditorView, basicSetup } from 'https://esm.sh/codemirror@6.0.2';
import { EditorState, Compartment } from 'https://esm.sh/@codemirror/state@6.5.4';
import { keymap } from 'https://esm.sh/@codemirror/view@6.39.14';
import { indentUnit } from 'https://esm.sh/@codemirror/language@6.12.1';

However, esm.sh resolves transitive dependencies to the latest matching semver. For example:

• @codemirror/view@6.41.0 (resolved by codemirror@6.0.2 via ^6.0.0) depends on @codemirror/state@^6.6.0
• This pulls in @codemirror/state@6.6.0 as a separate module from the pinned @codemirror/state@6.5.4

Two instances of @codemirror/state are loaded simultaneously, which breaks instanceof checks used internally by CodeMirror.

Observed duplicate versions (from network requests)

Package	Pinned (editor.js)	Transitive (esm.sh)
@codemirror/state	6.5.4	6.6.0
@codemirror/view	6.39.14	6.41.0
@codemirror/language	6.12.1	6.12.3

Suggested Fix

Update the pinned versions in docs/public/editor/editor.js to match the latest versions that transitive deps resolve to:

import { EditorState, Compartment } from 'https://esm.sh/@codemirror/state@6.6.0';
import { keymap } from 'https://esm.sh/@codemirror/view@6.41.0';
import { indentUnit } from 'https://esm.sh/@codemirror/language@6.12.3';

This will break again over time as esm.sh resolves newer transitive versions. A more durable fix would be to either:

1. Use esm.sh import maps or ?deps= params to force version alignment
2. Bundle the editor with a proper package manager instead of relying on esm.sh CDN resolution

[Mossaka]

Going to research on how to make the editor dep free