docs: add comments on codeium logic

Author: 1egoman

packages/web/src/lib/ai-autocomplete/index.ts

@@ -5,9 +5,12 @@ import { type CodiumCompletionResult } from '@srcbook/shared';
 import languageServerProto from './language-server-proto';
 
 // NOTE: this EDITOR_API_KEY value was just included as a raw string in
-// @codeium/react-code-editor. This seems to not be a secret?
+// @codeium/react-code-editor. This seems to not be a secret? See here:
+// https://github.com/Exafunction/codeium-react-code-editor/blob/768e1b231c00e078c86bc19c8ede697a1e37ec75/src/components/CodeiumEditor/CompletionProvider.ts#L48
 const EDITOR_API_KEY = 'd49954eb-cfba-4992-980f-d8fb37f0e942';
 
+// NOTE: The below logic has been adapted from codeium's `@codeium/react-code-editor package. See here:
+// https://github.com/Exafunction/codeium-react-code-editor/blob/768e1b231c00e078c86bc19c8ede697a1e37ec75/src/components/CodeiumEditor/CompletionProvider.ts#L147-L159
 export async function runCodiumAiAutocomplete(
   optionalApiKey: string | null,
   source: string,