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/hooks/scripts/session-end.mjs

@@ -0,0 +1,67 @@
+// Interaction Awareness — SessionEnd hook (Layer 2, Node.js)
+// Finalizes session record, computes duration, cleans up state.
+
+import { existsSync } from 'fs';
+import {
+  readStdin, initConfig, requireLayer, getSessionId,
+  nowEpoch, nowIso,
+  STATE_DIR, SESSIONS_LOG,
+  readState, sessionStateFile, appendJsonl, removeFile
+} from './lib.mjs';
+
+readStdin();
+initConfig();
+requireLayer(2);
+
+const sid = getSessionId();
+if (!sid) process.exit(0);
+
+const nowTs = nowEpoch();
+const nowIsoStr = nowIso();
+const sf = sessionStateFile();
+
+if (!existsSync(sf)) {
+  appendJsonl(SESSIONS_LOG, {
+    session_id: sid,
+    end: nowIsoStr,
+    note: 'no_state_file'
+  });
+  process.exit(0);
+}
+
+// Read final state
+const state = readState();
+const startEpoch = Number(state.start_epoch) || 0;
+const toolCount = Number(state.tool_count) || 0;
+const editCount = Number(state.edit_count) || 0;
+const depFlags = Number(state.dep_flags) || 0;
+const escFlags = Number(state.esc_flags) || 0;
+const fatFlags = Number(state.fatigue_flags) || 0;
+const valFlags = Number(state.val_flags) || 0;
+const startIso = state.start_iso || '';
+
+// Compute duration
+let durationMin = 0;
+if (startEpoch > 0) {
+  durationMin = Math.floor((nowTs - startEpoch) / 60);
+}
+
+// Append finalized session record
+appendJsonl(SESSIONS_LOG, {
+  session_id: sid,
+  start: startIso,
+  end: nowIsoStr,
+  duration_min: durationMin,
+  tool_count: toolCount,
+  edit_count: editCount,
+  flags: {
+    dependency: depFlags,
+    escalation: escFlags,
+    fatigue: fatFlags,
+    validation: valFlags
+  }
+});
+
+// Clean up state file
+removeFile(sf);
+process.exit(0);