diff --git a/index.ts b/index.ts
index b586837..25da230 100644
--- a/index.ts
+++ b/index.ts
@@ -3,10 +3,24 @@
 import {readFileSync} from 'node:fs';
 import {resolve, basename, extname, dirname, relative, join} from 'node:path';
 
-import {getAssetEntrypoints, getScriptEntrypoints} from './entrypoints';
-
 import {type RollupOptions, type Plugin} from 'rollup';
 
+import {getAssetEntrypoints, getScriptEntrypoints} from './entrypoints';
+
+/**
+ * Looks through a `manifest.json` file for Javascript entrypoints and other
+ * assets, and returns an array of Rollup configuration. This configuration will
+ * have each entrypoint processed as its own bundle, and will additionally
+ * handle copying the manifest and other assets into the build output, as well
+ * as any necessary path rewriting in the manifest itself.
+ * @param options
+ * @param options.manifest Path to the manifest file to be processed, relative
+ * to the current working directory
+ * @param options.outDir Directory path where build output will go
+ * @param options.plugins Rollup plugins to be used when processing each
+ * Javascript entry point
+ * @param options.sourcemap Controls inclusion of sourcemaps in the output
+ */
 export function buildConfig ({
 	manifest: manifestPathRelative,
 	outDir,