chore(ultraplan-local): Spor 0 — foundation for v3.1.0 kvalitetsprogram

- package.json med node:test runner og scripts (test, simulate), zero deps
- settings.json: fjern vestigial exploration- og agentTeam-blokker (verifisert leset av ingen kode via grep)
- docs/: commit subagent-delegation-audit.md og ultraexecute-v2-observations-from-config-audit-v4.md (begge real arkitektur-notater)
- docs/: arkiver ultra-suite-brief_2.md som _archive- (var paste fra annet plugin-arbeid, irrelevant her)
- tests/helpers/hook-helper.mjs kopiert fra llm-security m/ provenance-kommentar

Forberedelse for Spor 1 (lib/-moduler), Spor 2 (HANDOVER-CONTRACTS + PreCompact-hook), Spor 3 (bug-fixes + CC-features).

Plan: ~/.claude/plans/det-neste-vi-gj-r-eventual-adleman.md

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/ultraplan-local/tests/helpers/hook-helper.mjs

@@ -0,0 +1,45 @@
+// hook-helper.mjs — Shared test helper for hook scripts.
+// Spawns a hook as a child process and feeds it JSON via stdin.
+//
+// Source: ../../../llm-security/tests/hooks/hook-helper.mjs (verbatim copy)
+// Provenance: borrowed within the same marketplace (same author, MIT).
+
+import { execFile } from 'node:child_process';
+
+/**
+ * Run a hook script by spawning `node <scriptPath>` and piping `input` to stdin.
+ *
+ * @param {string} scriptPath - Absolute path to the hook .mjs file
+ * @param {object|string} input - JSON payload (object will be stringified)
+ * @returns {Promise<{ code: number, stdout: string, stderr: string }>}
+ */
+export function runHook(scriptPath, input) {
+  return runHookWithEnv(scriptPath, input, {});
+}
+
+/**
+ * Run a hook script with custom environment variables.
+ *
+ * @param {string} scriptPath - Absolute path to the hook .mjs file
+ * @param {object|string} input - JSON payload (object will be stringified)
+ * @param {Record<string, string>} envOverrides - Extra env vars to set
+ * @returns {Promise<{ code: number, stdout: string, stderr: string }>}
+ */
+export function runHookWithEnv(scriptPath, input, envOverrides) {
+  return new Promise((resolve) => {
+    const env = { ...process.env, ...envOverrides };
+    const child = execFile(
+      'node',
+      [scriptPath],
+      { timeout: 5000, env },
+      (err, stdout, stderr) => {
+        resolve({
+          code: child.exitCode ?? (err && err.code === 'ERR_CHILD_PROCESS_STDIO_FINAL' ? 0 : 1),
+          stdout: stdout || '',
+          stderr: stderr || '',
+        });
+      }
+    );
+    child.stdin.end(typeof input === 'string' ? input : JSON.stringify(input));
+  });
+}