feat(mem0-plugin): file-context injection, stop-hook summaries & activity timeline (#5346)

mem0-plugin/scripts/_formatting.py

@@ -0,0 +1,51 @@
+"""Shared formatting helpers for mem0 plugin hooks.
+
+Constants and utilities used by file_context.py, session_timeline.py,
+and any future hook that displays memories.
+"""
+
+from __future__ import annotations
+
+TYPE_ICONS = {
+    "decision": "⚖️",
+    "anti_pattern": "\U0001f534",
+    "bug_fix": "\U0001f534",
+    "convention": "\U0001f504",
+    "task_learning": "\U0001f535",
+    "user_preference": "\U0001f7e3",
+    "session_summary": "\U0001f4cb",
+    "session_state": "\U0001f4cb",
+    "project_profile": "\U0001f4d6",
+    "compact_summary": "\U0001f4cb",
+    "auto_capture": "✅",
+    "environmental": "🌐",
+    "health_check": "🩺",
+}
+
+
+def format_age(memory: dict) -> str:
+    """Format how long ago a memory was created, e.g. '2h ago', '3d ago'."""
+    created = memory.get("created_at", "")
+    if not created:
+        return ""
+    try:
+        from datetime import datetime, timezone
+
+        if created.endswith("Z"):
+            created = created[:-1] + "+00:00"
+        dt = datetime.fromisoformat(created)
+        now = datetime.now(timezone.utc)
+        delta = now - dt
+        seconds = int(delta.total_seconds())
+        if seconds < 3600:
+            return f"{seconds // 60}m ago"
+        if seconds < 86400:
+            return f"{seconds // 3600}h ago"
+        days = seconds // 86400
+        if days == 1:
+            return "1d ago"
+        if days < 30:
+            return f"{days}d ago"
+        return f"{days // 30}mo ago"
+    except Exception:
+        return ""