diff --git a/deno.jsonc b/deno.jsonc
index 825aab0..a146961 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -13,5 +13,6 @@
 		"semiColons": true,
 		"singleQuote": true
 	},
-	"nodeModulesDir": true
+	"nodeModulesDir": true,
+	"exclude": ["src/bun/"]
 }
diff --git a/justfile b/justfile
index 89848e1..e8f9712 100644
--- a/justfile
+++ b/justfile
@@ -14,7 +14,7 @@ check: deno-check bun-check
 
 # Generate source docs
 docs:
-	deno doc --html --name="Scroll" ./src/scroll.ts ./src/common/*.ts ./src/deno/mod.ts ./src/bun/mod.ts ./src/tsx/mod.ts
+	deno doc --html --name="Scroll" ./src/common/*.ts ./src/common/**/*.ts
 
 # Generate source docs and open in default browser
 open-docs: docs
diff --git a/src/bun/mod.ts b/src/bun/mod.ts
index e83c484..02b236e 100644
--- a/src/bun/mod.ts
+++ b/src/bun/mod.ts
@@ -1,7 +1,7 @@
 /**
  * The main entrypoint when using Bun as the runtime
  */
-import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime/mod.ts';
+import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime.ts';
 
 /**
  * The Bun Runtime implementation
diff --git a/src/common/all_test.ts b/src/common/all_test.ts
index eba7de3..2663e3e 100644
--- a/src/common/all_test.ts
+++ b/src/common/all_test.ts
@@ -2,17 +2,16 @@ import Ansi, * as _Ansi from './ansi.ts';
 import Buffer from './buffer.ts';
 import Document from './document.ts';
 import Editor from './editor.ts';
-import { FileLang } from './filetype/mod.ts';
-import { highlightToColor, HighlightType } from './highlight.ts';
+import { FileLang } from './filetype.ts';
 import Option, { None, Some } from './option.ts';
 import Position from './position.ts';
 import Row from './row.ts';
 
-import FileType, * as FT from './filetype/mod.ts';
+import FileType, * as FT from './filetype.ts';
 import * as Fn from './fns.ts';
 import { defaultTerminalSize, SCROLL_TAB_SIZE } from './config.ts';
-import { getTestRunner } from './runtime/mod.ts';
-import { SearchDirection } from './types.ts';
+import { getTestRunner } from './runtime.ts';
+import { HighlightType, SearchDirection } from './types.ts';
 
 import fs from 'node:fs';
 
@@ -51,6 +50,7 @@ const fnTest = () => {
 		isAsciiDigit,
 		strlen,
 		truncate,
+		highlightToColor,
 	} = Fn;
 
 	return {
@@ -78,6 +78,21 @@ const fnTest = () => {
 			assertExists(noop);
 			assertEquals(noop(), undefined);
 		},
+		'highlightToColor()': () => {
+			[
+				HighlightType.Number,
+				HighlightType.Match,
+				HighlightType.String,
+				HighlightType.SingleLineComment,
+				HighlightType.MultiLineComment,
+				HighlightType.Keyword1,
+				HighlightType.Keyword2,
+				HighlightType.Operator,
+				HighlightType.None,
+			].forEach((type) => {
+				assertTrue(highlightToColor(type).length > 0);
+			});
+		},
 		'posSub()': () => {
 			assertEquals(posSub(14, 15), 0);
 			assertEquals(posSub(15, 1), 14);
@@ -201,24 +216,6 @@ const readKeyTest = () => {
 	};
 };
 
-const highlightToColorTest = {
-	'highlightToColor()': () => {
-		[
-			HighlightType.Number,
-			HighlightType.Match,
-			HighlightType.String,
-			HighlightType.SingleLineComment,
-			HighlightType.MultiLineComment,
-			HighlightType.Keyword1,
-			HighlightType.Keyword2,
-			HighlightType.Operator,
-			HighlightType.None,
-		].forEach((type) => {
-			assertTrue(highlightToColor(type).length > 0);
-		});
-	},
-};
-
 // ----------------------------------------------------------------------------
 // Tests by module
 // ----------------------------------------------------------------------------
@@ -708,7 +705,6 @@ const RowTest = {
 
 testSuite({
 	fns: fnTest(),
-	highlightToColorTest,
 	'readKey()': readKeyTest(),
 	'ANSI utils': ANSITest(),
 	Buffer: BufferTest,
diff --git a/src/common/ansi.ts b/src/common/ansi.ts
index 43815dd..d07d72c 100644
--- a/src/common/ansi.ts
+++ b/src/common/ansi.ts
@@ -117,6 +117,9 @@ const rgb = (
 	ground: Ground = Ground.Fore,
 ): string => textFormat([ground, AnsiColor.TypeRGB, r, g, b]);
 
+/**
+ * Ansi terminal codes and helper functions
+ */
 export const Ansi = {
 	ClearLine: code('K'),
 	ClearScreen: code('2J'),
diff --git a/src/common/buffer.ts b/src/common/buffer.ts
index 3201df0..94dc878 100644
--- a/src/common/buffer.ts
+++ b/src/common/buffer.ts
@@ -1,6 +1,9 @@
 import { strlen, truncate } from './fns.ts';
-import { getRuntime } from './runtime/mod.ts';
+import { getRuntime } from './runtime.ts';
 
+/**
+ * A simple string buffer
+ */
 class Buffer {
 	#b = '';
 
diff --git a/src/common/config.ts b/src/common/config.ts
index b036e3f..d6325a0 100644
--- a/src/common/config.ts
+++ b/src/common/config.ts
@@ -1,7 +1,7 @@
 import Ansi from './ansi.ts';
 import { HighlightType, ITerminalSize } from './types.ts';
 
-export const SCROLL_VERSION = '0.0.1';
+export const SCROLL_VERSION = '0.1.0';
 export const SCROLL_QUIT_TIMES = 3;
 export const SCROLL_TAB_SIZE = 4;
 
diff --git a/src/common/document.ts b/src/common/document.ts
index 3d945b2..2073d25 100644
--- a/src/common/document.ts
+++ b/src/common/document.ts
@@ -1,8 +1,8 @@
 import Row from './row.ts';
-import { FileType } from './filetype/mod.ts';
+import { FileType } from './filetype.ts';
 import { arrayInsert } from './fns.ts';
 import Option, { None, Some } from './option.ts';
-import { getRuntime, logWarning } from './runtime/mod.ts';
+import { getRuntime, logWarning } from './runtime.ts';
 import { Position, SearchDirection } from './types.ts';
 
 export class Document {
@@ -52,7 +52,7 @@ export class Document {
 
 		const rawFile = await file.openFile(filename);
 		rawFile.split(/\r?\n/)
-			.forEach((row) => {
+			.forEach((row: string) => {
 				this.#rows.push(Row.from(row));
 			});
 
diff --git a/src/common/editor.ts b/src/common/editor.ts
index fc5ce29..dd25e09 100644
--- a/src/common/editor.ts
+++ b/src/common/editor.ts
@@ -13,7 +13,7 @@ import {
 	truncate,
 } from './fns.ts';
 import Option, { None, Some } from './option.ts';
-import { getRuntime, logDebug, logWarning } from './runtime/mod.ts';
+import { getRuntime, logDebug, logWarning } from './runtime.ts';
 import { ITerminalSize, Position, SearchDirection } from './types.ts';
 
 /**
diff --git a/src/common/filetype.ts b/src/common/filetype.ts
new file mode 100644
index 0000000..914f507
--- /dev/null
+++ b/src/common/filetype.ts
@@ -0,0 +1,5 @@
+export * from './filetype/base.ts';
+export * from './filetype/filetype.ts';
+
+import FileType from './filetype/filetype.ts';
+export default FileType;
diff --git a/src/common/filetype/filetype.ts b/src/common/filetype/filetype.ts
index 47cc290..0610877 100644
--- a/src/common/filetype/filetype.ts
+++ b/src/common/filetype/filetype.ts
@@ -1,4 +1,4 @@
-import { node_path as path } from '../runtime/mod.ts';
+import { node_path as path } from '../runtime.ts';
 import { AbstractFileType } from './base.ts';
 import { CFile } from './c.ts';
 import { CSSFile } from './css.ts';
diff --git a/src/common/filetype/mod.ts b/src/common/filetype/mod.ts
deleted file mode 100644
index a2bf1a0..0000000
--- a/src/common/filetype/mod.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-export * from './base.ts';
-export * from './filetype.ts';
-
-import FileType from './filetype.ts';
-export default FileType;
diff --git a/src/common/fns.ts b/src/common/fns.ts
index dcc6f1a..aefde84 100644
--- a/src/common/fns.ts
+++ b/src/common/fns.ts
@@ -1,4 +1,6 @@
-import { KeyCommand } from './ansi.ts';
+import Ansi, { KeyCommand } from './ansi.ts';
+import { SCROLL_COLOR_SCHEME } from './config.ts';
+import { HighlightType } from './types.ts';
 
 const decoder = new TextDecoder();
 
@@ -57,6 +59,16 @@ export function readKey(raw: Uint8Array): string {
 	}
 }
 
+/**
+ * Return the configured ANSI formatting escape codes for the
+ * type of syntax specified
+ *
+ * @param type The type of syntax to highlight
+ */
+export function highlightToColor(type: HighlightType): string {
+	return SCROLL_COLOR_SCHEME.get(type) ?? Ansi.ResetFormatting;
+}
+
 // ----------------------------------------------------------------------------
 // Array manipulation
 // ----------------------------------------------------------------------------
diff --git a/src/common/highlight.ts b/src/common/highlight.ts
deleted file mode 100644
index 7919562..0000000
--- a/src/common/highlight.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import Ansi from './ansi.ts';
-import { SCROLL_COLOR_SCHEME } from './config.ts';
-
-/**
- * The type of Syntax being highlighted
- */
-export enum HighlightType {
-	/** No highlighting */
-	None,
-	/** Number literals */
-	Number,
-	/** Search results */
-	Match,
-	/** Character literals */
-	Character,
-	/** String literals */
-	String,
-	/** Single line comments */
-	SingleLineComment,
-	/** Multi-line comments */
-	MultiLineComment,
-	/** Primary keywords */
-	Keyword1,
-	/** Secondary keywords */
-	Keyword2,
-	/** Math/logic operators */
-	Operator,
-}
-
-/**
- * Return the configured ANSI formatting escape codes for the
- * type of syntax specified
- *
- * @param type The type of syntax to highlight
- */
-export function highlightToColor(type: HighlightType): string {
-	return SCROLL_COLOR_SCHEME.get(type) ?? Ansi.ResetFormatting;
-}
diff --git a/src/common/main.ts b/src/common/main.ts
index a3f3acd..9328a3d 100644
--- a/src/common/main.ts
+++ b/src/common/main.ts
@@ -4,10 +4,15 @@ import {
 	logError,
 	logWarning,
 	node_process as process,
-} from './runtime/mod.ts';
+} from './runtime.ts';
 import Editor from './editor.ts';
 
-export async function main() {
+/**
+ * The main runtime loop
+ *
+ * Only returns on error or quit
+ */
+export async function main(): Promise<void> {
 	const rt = await getRuntime();
 	const { term } = rt;
 
@@ -18,7 +23,7 @@ export async function main() {
 	});
 
 	// Setup error handler to log to file
-	rt.onEvent('error', (error) => {
+	rt.onEvent('error', (error: any) => {
 		process.stdin.setRawMode(false);
 		logError(JSON.stringify(error, null, 2));
 	});
diff --git a/src/common/position.ts b/src/common/position.ts
index 06010c5..cc50cd8 100644
--- a/src/common/position.ts
+++ b/src/common/position.ts
@@ -4,14 +4,23 @@
 export class Position {
 	private constructor(public x: number = 0, public y: number = 0) {}
 
+	/**
+	 * Create a new `Position` at the specified location
+	 */
 	public static at(x: number, y: number): Position {
 		return new Position(x, y);
 	}
 
+	/**
+	 * Create a new `Position` from an existing one
+	 */
 	public static from(p: Position): Position {
 		return new Position(p.x, p.y);
 	}
 
+	/**
+	 * Create a new `Position` at the origin (0, 0)
+	 */
 	public static default(): Position {
 		return new Position();
 	}
diff --git a/src/common/row.ts b/src/common/row.ts
index 4e10d47..2a22829 100644
--- a/src/common/row.ts
+++ b/src/common/row.ts
@@ -3,16 +3,16 @@ import Ansi from './ansi.ts';
 import { SCROLL_TAB_SIZE } from './config.ts';
 import {
 	arrayInsert,
+	highlightToColor,
 	isAsciiDigit,
 	isSeparator,
 	strChars,
 	strlen,
 	substr,
 } from './fns.ts';
-import { FileType } from './filetype/mod.ts';
-import { highlightToColor, HighlightType } from './highlight.ts';
+import { FileType } from './filetype.ts';
 import Option, { None, Some } from './option.ts';
-import { SearchDirection } from './types.ts';
+import { HighlightType, SearchDirection } from './types.ts';
 
 const SINGLE_QUOTE = "'";
 const DOUBLE_QUOTE = '"';
diff --git a/src/common/runtime.ts b/src/common/runtime.ts
new file mode 100644
index 0000000..9db1a16
--- /dev/null
+++ b/src/common/runtime.ts
@@ -0,0 +1,11 @@
+export * from './runtime/file_io.ts';
+export * from './runtime/helpers.ts';
+export * from './runtime/log.ts';
+export * from './runtime/node.ts';
+export * from './runtime/runtime.ts';
+export * from './runtime/terminal_io.ts';
+export * from './runtime/test_base.ts';
+export { RunTimeType } from './types.ts';
+
+import { CommonRuntime } from './runtime/runtime.ts';
+export default CommonRuntime;
diff --git a/src/common/runtime/file_io.ts b/src/common/runtime/file_io.ts
index 9f13d08..a91464a 100644
--- a/src/common/runtime/file_io.ts
+++ b/src/common/runtime/file_io.ts
@@ -1,8 +1,11 @@
 import { appendFile, readFile, writeFile } from 'node:fs/promises';
 import { resolve } from 'node:path';
 
-import { IFileIO } from './mod.ts';
+import { IFileIO } from './runtime.ts';
 
+/**
+ * File IO implementation using shared node APIs
+ */
 export const CommonFileIO: IFileIO = {
 	openFile: async function (path: string): Promise<string> {
 		const filePath = resolve(path);
diff --git a/src/common/runtime/helpers.ts b/src/common/runtime/helpers.ts
index 8e559ff..98fb88e 100644
--- a/src/common/runtime/helpers.ts
+++ b/src/common/runtime/helpers.ts
@@ -3,8 +3,9 @@
  */
 import { logError, logWarning } from './log.ts';
 import { node_path as path, node_process as process } from './node.ts';
-import { RunTimeType } from './runtime.ts';
-import { IRuntime, ITestBase } from '../types.ts';
+import { IRuntime } from './runtime.ts';
+import { ITestBase } from './test_base.ts';
+import { RunTimeType } from '../types.ts';
 
 let scrollRuntime: IRuntime | null = null;
 
diff --git a/src/common/runtime/log.ts b/src/common/runtime/log.ts
index 308949e..e1e5823 100644
--- a/src/common/runtime/log.ts
+++ b/src/common/runtime/log.ts
@@ -1,6 +1,6 @@
 import { noop } from '../fns.ts';
 import { SCROLL_LOG_FILE_PREFIX, SCROLL_LOG_FILE_SUFFIX } from '../config.ts';
-import { getRuntime } from './mod.ts';
+import { getRuntime } from './helpers.ts';
 
 /**
  * The label for type/severity of the log entry
@@ -14,7 +14,11 @@ export enum LogLevel {
 }
 
 /**
- * Basic logging -
+ * Basic logging
+ *
+ * @param s The string or data to display first
+ * @param level The log severity
+ * @param data Any additional data to display with the log entry
  */
 export function log(
 	s: unknown,
@@ -34,12 +38,31 @@ export function log(
 	});
 }
 
+/**
+ * Make a log entry of `LogLevel.Debug` severity
+ */
 export const logDebug = (s: unknown, data?: any) =>
 	log(s, LogLevel.Debug, data);
+
+/**
+ * Make a log entry of `LogLevel.Info` severity
+ */
 export const logInfo = (s: unknown, data?: any) => log(s, LogLevel.Info, data);
+
+/**
+ * Make a log entry of `LogLevel.Notice` severity
+ */
 export const logNotice = (s: unknown, data?: any) =>
 	log(s, LogLevel.Notice, data);
+
+/**
+ * Make a log entry of `LogLevel.Warning` severity
+ */
 export const logWarning = (s: unknown, data?: any) =>
 	log(s, LogLevel.Warning, data);
+
+/**
+ * Make a log entry of `LogLevel.Error` severity
+ */
 export const logError = (s: unknown, data?: any) =>
 	log(s, LogLevel.Warning, data);
diff --git a/src/common/runtime/mod.ts b/src/common/runtime/mod.ts
deleted file mode 100644
index 7a80efe..0000000
--- a/src/common/runtime/mod.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-export * from './file_io.ts';
-export * from './helpers.ts';
-export * from './log.ts';
-export * from './node.ts';
-export * from './runtime.ts';
-export * from './terminal_io.ts';
-export * from './test_base.ts';
-
-import { CommonRuntime } from './runtime.ts';
-export default CommonRuntime;
diff --git a/src/common/runtime/runtime.ts b/src/common/runtime/runtime.ts
index 5adc69d..e17bc1e 100644
--- a/src/common/runtime/runtime.ts
+++ b/src/common/runtime/runtime.ts
@@ -1,6 +1,7 @@
 import { node_process as process } from './node.ts';
 import CommonFileIO from './file_io.ts';
 import CommonTerminalIO from './terminal_io.ts';
+import { RunTimeType } from '../types.ts';
 
 // ----------------------------------------------------------------------------
 // Runtime adapter interfaces
@@ -14,16 +15,6 @@ export interface ITerminalSize {
 	cols: number;
 }
 
-/**
- * Which Typescript runtime is currently being used
- */
-export enum RunTimeType {
-	Bun = 'bun',
-	Deno = 'deno',
-	Tsx = 'tsx',
-	Unknown = 'common',
-}
-
 /**
  * Runtime-specific terminal functionality
  */
@@ -131,6 +122,9 @@ export interface IRuntime {
 	exit(code?: number): void;
 }
 
+/**
+ * Base runtime using shared Node APIs
+ */
 export const CommonRuntime: IRuntime = {
 	name: RunTimeType.Unknown,
 	term: CommonTerminalIO,
diff --git a/src/common/runtime/terminal_io.ts b/src/common/runtime/terminal_io.ts
index 9804e61..cc137ff 100644
--- a/src/common/runtime/terminal_io.ts
+++ b/src/common/runtime/terminal_io.ts
@@ -2,6 +2,9 @@ import { node_process as process } from './node.ts';
 import { readKey } from '../fns.ts';
 import { ITerminal, ITerminalSize } from '../types.ts';
 
+/**
+ * Terminal IO using shared Node APIs
+ */
 export const CommonTerminalIO: ITerminal = {
 	argv: (process.argv.length > 2) ? process.argv.slice(2) : [],
 	inputLoop: async function* (): AsyncGenerator<Uint8Array, null> {
diff --git a/src/common/runtime/test_base.ts b/src/common/runtime/test_base.ts
index c143d31..c4133cc 100644
--- a/src/common/runtime/test_base.ts
+++ b/src/common/runtime/test_base.ts
@@ -4,6 +4,10 @@
 import { deepStrictEqual, notStrictEqual, strictEqual } from 'node:assert';
 import Option from '../option.ts';
 
+/**
+ * The shared interface for tests, running on a different test
+ * runner for each runtime
+ */
 export interface ITestBase {
 	assertEquivalent(actual: unknown, expected: unknown): void;
 	assertExists(actual: unknown): void;
@@ -20,6 +24,9 @@ export interface ITestBase {
 	testSuite(testObj: any): void;
 }
 
+/**
+ * The base testing implementation using Node assert API
+ */
 export abstract class AbstractTestBase implements Partial<ITestBase> {
 	/**
 	 * The values (often objects) have all the same property values
diff --git a/src/common/types.ts b/src/common/types.ts
index bd6cd2f..d85e9f8 100644
--- a/src/common/types.ts
+++ b/src/common/types.ts
@@ -1,13 +1,42 @@
-export { HighlightType } from './highlight.ts';
 export { Position } from './position.ts';
 export type { ITestBase } from './runtime/test_base.ts';
-export type {
-	IFileIO,
-	IRuntime,
-	ITerminal,
-	ITerminalSize,
-	RunTimeType,
-} from './runtime/mod.ts';
+export type { IFileIO, IRuntime, ITerminal, ITerminalSize } from './runtime.ts';
+
+/**
+ * Which Typescript runtime is currently being used
+ */
+export enum RunTimeType {
+	Bun = 'bun',
+	Deno = 'deno',
+	Tsx = 'tsx',
+	Unknown = 'unknown',
+}
+
+/**
+ * The type of Syntax being highlighted
+ */
+export enum HighlightType {
+	/** No highlighting */
+	None,
+	/** Number literals */
+	Number,
+	/** Search results */
+	Match,
+	/** Character literals */
+	Character,
+	/** String literals */
+	String,
+	/** Single line comments */
+	SingleLineComment,
+	/** Multi-line comments */
+	MultiLineComment,
+	/** Primary keywords */
+	Keyword1,
+	/** Secondary keywords */
+	Keyword2,
+	/** Math/logic operators */
+	Operator,
+}
 
 /**
  * Which direction to search in the current document
diff --git a/src/deno/file_io.ts b/src/deno/file_io.ts
index 83f6bf7..c81194d 100644
--- a/src/deno/file_io.ts
+++ b/src/deno/file_io.ts
@@ -1,4 +1,4 @@
-import { IFileIO } from '../common/runtime/mod.ts';
+import { IFileIO } from '../common/runtime.ts';
 
 const DenoFileIO: IFileIO = {
 	openFile: async function (path: string): Promise<string> {
diff --git a/src/deno/mod.ts b/src/deno/mod.ts
index 6d528e9..22dfef9 100644
--- a/src/deno/mod.ts
+++ b/src/deno/mod.ts
@@ -1,7 +1,7 @@
 /**
  * The main entrypoint when using Deno as the runtime
  */
-import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime/mod.ts';
+import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime.ts';
 import DenoTerminalIO from './terminal_io.ts';
 import DenoFileIO from './file_io.ts';
 
diff --git a/src/tsx/mod.ts b/src/tsx/mod.ts
index bd203c7..2ade92b 100644
--- a/src/tsx/mod.ts
+++ b/src/tsx/mod.ts
@@ -1,7 +1,7 @@
 /**
  * The main entrypoint when using Tsx as the runtime
  */
-import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime/mod.ts';
+import { CommonRuntime, IRuntime, RunTimeType } from '../common/runtime.ts';
 
 /**
  * The Tsx Runtime implementation