Document that package.json aliases may target only direct subfolders of src (#21)

Follow-up to #20, which was merged before this landed.

bot-agents has no `package.json` `imports` aliases (`src/` is flat and everything imports relatively), so no code changes. This records the new rule in the docs:

- `.agents/memory/imports-aliases-barrels.md`: aliases may target only a direct subfolder of `src/` (its `index.ts` or a `#x/*` pattern); nothing outside `src/`, not `src/` itself, not deeper folders; such code imports relatively.
- `.agents/memory/tests-layout-vitest.md`: `tests/` reach the public entry through a relative import, not a `#plugin` alias.
- `.agents/skills/migrate-deno-repo/SKILL.md` and `AGENTS.md`: same rule.

`vp check`, `vp test`, and `damem doctor` pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: #21
Reviewed-by: bot <noreply@capsulizers.com>
Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

tests/entrypoints.test.ts

@@ -3,7 +3,7 @@ import { fileURLToPath } from "node:url";
 
 import { expect, test } from "vite-plus/test";
 
-import { output } from "../src/command.ts";
+import { runCommand } from "#testing";
 
 // Each phase runs as `node src/<phase>.ts` with no build step. Node loads the
 // whole import graph, stripping types, before the phase reads its first
@@ -16,12 +16,7 @@ const PHASES: [phase: string, firstVariable: string][] = [
 
 test.each(PHASES)("Node loads the %s phase", async (phase, firstVariable) => {
   const path = fileURLToPath(new URL(`../src/${phase}.ts`, import.meta.url));
-  const result = await output(process.execPath, {
-    args: [path],
-    env: { PATH: process.env.PATH ?? "" },
-    clearEnv: true,
-    stdin: "null",
-  });
+  const result = await runCommand(process.execPath, [path], { PATH: process.env["PATH"] ?? "" });
   expect(result.success).toBe(false);
-  expect(new TextDecoder().decode(result.stderr)).toContain(`${firstVariable} is not set`);
+  expect(result.stderr).toContain(`${firstVariable} is not set`);
 });