register checks via static barrel instead of readdir + dynamic import

Checks keep self-registering on import; src/checks/all.ts imports every
shipped check from the entry's static graph. Keeps the check graph fully
statically resolvable (bundler/loader friendly) and removes the only
dynamic-import discovery in the codebase.

src/checks/all.ts

@@ -0,0 +1,15 @@
+/**
+ * Static barrel for shipped checks.
+ *
+ * Every check module self-registers on import (top-level `registerCheck`), so
+ * importing all of them here — once, statically, from the entry graph —
+ * registers every check before commands bind. Adding a check means dropping
+ * the file in and adding one import line here.
+ */
+import "./comments.js";
+import "./complexity.js";
+import "./dead-code.js";
+import "./deep-modules.js";
+import "./defensive-guards.js";
+import "./scope.js";
+import "./todos.js";

src/index.ts

@@ -3,11 +3,15 @@
  *
  * Entry point. Registers `/pygienium-help`, auto-registers one
  * `/pygienium-<check>` command per registered `CheckDefinition`, plus the
- * `all`/`resume`/`status`/`export` commands. Adding a check requires ONLY a new
- * file in `src/checks/` plus one `registerCheck(def)` call — no changes here.
+ * `all`/`resume`/`status`/`export` commands. Adding a check requires a new
+ * file in `src/checks/` plus one import line in `src/checks/all.ts` — no
+ * changes here.
  *
- * Check files in `src/checks/` are auto-discovered (every `.ts` except the
- * registry barrel), so they self-register at load time before commands bind.
+ * Check modules self-register on import (top-level `registerCheck`); the
+ * static barrel `src/checks/all.ts` imports every shipped check so they all
+ * register before commands bind. A static import list (rather than readdir +
+ * dynamic import) keeps the whole check graph resolvable up front, which
+ * matters for bundlers and module-loaders that tag extension graphs.
  *
  * Pi loads this file via jiti at runtime (see `pi.extensions` in package.json).
  * The default export runs once per session; the factory is async so check
@@ -16,10 +20,9 @@
  * @module pygienium/index
  */
 
-import { readdir, readFile } from "node:fs/promises";
-import { dirname, join } from "node:path";
+import { readFile } from "node:fs/promises";
+import { join } from "node:path";
 import { homedir } from "node:os";
-import { fileURLToPath } from "node:url";
 import type {
 	ExtensionAPI,
 	ExtensionCommandContext,
@@ -28,6 +31,7 @@ import type {
 	SessionStartEvent,
 } from "@earendil-works/pi-coding-agent";
 import { Box, Text } from "@earendil-works/pi-tui";
+import "./checks/all.js";
 import { registerPygieniumCommands, type PygieniumCtx } from "./commands.js";
 import {
 	type SendChatMessage,
@@ -243,27 +247,6 @@ function makeStreamForwarder(pi: ExtensionAPI): StreamForwarder {
 	return { onAgentEvent, sendPhaseLine };
 }
 
-/**
- * Import every `checks/*.ts` module (except the registry barrel) so each check
- * file's top-level `registerCheck(def)` call runs before command binding. This
- * is what makes adding a check require zero index.ts changes — drop a file,
- * it self-registers.
- */
-async function loadCheckModules(): Promise<void> {
-	const dir = join(dirname(fileURLToPath(import.meta.url)), "checks");
-	let entries: string[];
-	try {
-		entries = await readdir(dir);
-	} catch {
-		return; // no checks dir (e.g. minimal install)
-	}
-	for (const entry of entries) {
-		if (!entry.endsWith(".ts")) continue;
-		if (entry === "registry.ts" || entry === "load.ts") continue;
-		await import(`./checks/${entry}`);
-	}
-}
-
 /**
  * Create a callback to send completion messages to the main chat window.
  */
@@ -283,9 +266,8 @@ function makeSendChatMessage(pi: ExtensionAPI): SendChatMessage {
 export default async function pygieniumExtension(
 	pi: ExtensionAPI,
 ): Promise<void> {
-	// Self-register every shipped check before wiring commands.
-	await loadCheckModules();
-
+	// Checks self-register on import (see ./checks/all.js), which runs before
+	// this factory — commands below bind against a fully populated registry.
 	const sendChatMessage = makeSendChatMessage(pi);
 
 	// Register custom message renderer for pygienium progress messages.