feat: add ai-psychosis plugin to open marketplace

Meta-awareness tools for healthy AI interaction patterns.
Detects reinforcement loops, scope escalation, and compulsive patterns.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/ai-psychosis/tests/session-start.test.mjs

@@ -0,0 +1,49 @@
+import { describe, it, afterEach } from 'node:test';
+import assert from 'node:assert/strict';
+import { join } from 'path';
+import { runHook, setupTestDir, cleanupTestDir, readState, readJsonl } from './test-helper.mjs';
+
+let dir;
+afterEach(() => { if (dir) cleanupTestDir(dir); });
+
+describe('session-start', () => {
+  it('creates state file and emits context', () => {
+    dir = setupTestDir();
+    const out = runHook('session-start.mjs', { session_id: 's1', cwd: '/tmp' }, dir);
+    assert.equal(out.continue, true);
+    assert.ok(out.hookSpecificOutput.additionalContext.includes('Interaction Awareness is active'));
+    const state = readState(dir, 's1');
+    assert.ok(state);
+    assert.equal(state.tool_count, 0);
+    assert.equal(state.edit_count, 0);
+    assert.equal(state.dep_flags, 0);
+  });
+
+  it('writes start record to sessions.jsonl', () => {
+    dir = setupTestDir();
+    runHook('session-start.mjs', { session_id: 's2', cwd: '/tmp' }, dir);
+    const records = readJsonl(join(dir, 'sessions.jsonl'));
+    assert.equal(records.length, 1);
+    assert.equal(records[0].session_id, 's2');
+    assert.ok('hour' in records[0]);
+    assert.ok('is_late_night' in records[0]);
+  });
+
+  it('state has correct initial fields', () => {
+    dir = setupTestDir();
+    runHook('session-start.mjs', { session_id: 's3', cwd: '/tmp' }, dir);
+    const state = readState(dir, 's3');
+    assert.equal(state.burst_count, 0);
+    assert.equal(state.last_event_epoch, 0);
+    assert.equal(state.last_warning_epoch, 0);
+    assert.ok(state.start_epoch > 0);
+    assert.ok(state.start_iso.length > 0);
+  });
+
+  it('returns continue with no side effects when session_id missing', () => {
+    dir = setupTestDir();
+    const out = runHook('session-start.mjs', { cwd: '/tmp' }, dir);
+    assert.equal(out.continue, true);
+    assert.ok(!out.hookSpecificOutput);
+  });
+});