docs: update FEATURES.yaml with new CLI commands

Closes #1266

- Fix cmd_path calling nonexistent _load() -> use MnemosyneArchive()
- Add path to dispatch dict
- Add touch, decay, vitality, fading, vibrant CLI commands

nexus/mnemosyne/FEATURES.yaml

@@ -67,7 +67,7 @@ modules:
   cli:
     status: shipped
     files: [cli.py]
-    description: CLI interface — stats, search, ingest, link, topics, remove, export, clusters, hubs, bridges, rebuild, tag/untag/retag, timeline, neighbors, consolidate
+    description: CLI interface — stats, search, ingest, link, topics, remove, export, clusters, hubs, bridges, rebuild, tag/untag/retag, timeline, neighbors, consolidate, path, touch, decay, vitality, fading, vibrant
 
   tests:
     status: shipped

nexus/mnemosyne/cli.py

@@ -4,7 +4,9 @@ Provides: mnemosyne ingest, mnemosyne search, mnemosyne link, mnemosyne stats,
           mnemosyne topics, mnemosyne remove, mnemosyne export,
           mnemosyne clusters, mnemosyne hubs, mnemosyne bridges, mnemosyne rebuild,
           mnemosyne tag, mnemosyne untag, mnemosyne retag,
-          mnemosyne timeline, mnemosyne neighbors
+          mnemosyne timeline, mnemosyne neighbors, mnemosyne path,
+          mnemosyne touch, mnemosyne decay, mnemosyne vitality,
+          mnemosyne fading, mnemosyne vibrant
 """
 
 from __future__ import annotations
@@ -208,7 +210,7 @@ def cmd_timeline(args):
 
 
 def cmd_path(args):
-    archive = _load(args.archive)
+    archive = MnemosyneArchive(archive_path=args.archive) if args.archive else MnemosyneArchive()
     path = archive.shortest_path(args.start, args.end)
     if path is None:
         print(f"No path found between {args.start} and {args.end}")
@@ -254,6 +256,65 @@ def cmd_neighbors(args):
         print()
 
 
+def cmd_touch(args):
+    archive = MnemosyneArchive()
+    try:
+        entry = archive.touch(args.entry_id)
+    except KeyError:
+        print(f"Entry not found: {args.entry_id}")
+        sys.exit(1)
+    v = archive.get_vitality(entry.id)
+    print(f"[{entry.id[:8]}] {entry.title}")
+    print(f"  Vitality: {v['vitality']:.4f} (boosted)")
+
+
+def cmd_decay(args):
+    archive = MnemosyneArchive()
+    result = archive.apply_decay()
+    print(f"Applied decay to {result['total_entries']} entries")
+    print(f"  Decayed: {result['decayed_count']}")
+    print(f"  Avg vitality: {result['avg_vitality']:.4f}")
+    print(f"  Fading (<0.3): {result['fading_count']}")
+    print(f"  Vibrant (>0.7): {result['vibrant_count']}")
+
+
+def cmd_vitality(args):
+    archive = MnemosyneArchive()
+    try:
+        v = archive.get_vitality(args.entry_id)
+    except KeyError:
+        print(f"Entry not found: {args.entry_id}")
+        sys.exit(1)
+    print(f"[{v['entry_id'][:8]}] {v['title']}")
+    print(f"  Vitality: {v['vitality']:.4f}")
+    print(f"  Last accessed: {v['last_accessed'] or 'never'}")
+    print(f"  Age: {v['age_days']} days")
+
+
+def cmd_fading(args):
+    archive = MnemosyneArchive()
+    results = archive.fading(limit=args.limit)
+    if not results:
+        print("Archive is empty.")
+        return
+    for v in results:
+        print(f"[{v['entry_id'][:8]}] {v['title']}")
+        print(f"  Vitality: {v['vitality']:.4f} | Age: {v['age_days']}d | Last: {v['last_accessed'] or 'never'}")
+        print()
+
+
+def cmd_vibrant(args):
+    archive = MnemosyneArchive()
+    results = archive.vibrant(limit=args.limit)
+    if not results:
+        print("Archive is empty.")
+        return
+    for v in results:
+        print(f"[{v['entry_id'][:8]}] {v['title']}")
+        print(f"  Vitality: {v['vitality']:.4f} | Age: {v['age_days']}d | Last: {v['last_accessed'] or 'never'}")
+        print()
+
+
 def main():
     parser = argparse.ArgumentParser(prog="mnemosyne", description="The Living Holographic Archive")
     sub = parser.add_subparsers(dest="command")
@@ -325,6 +386,21 @@ def main():
     co.add_argument("--dry-run", action="store_true", help="Show what would be merged without applying")
     co.add_argument("--threshold", type=float, default=0.9, help="Similarity threshold (default: 0.9)")
 
+
+    tc = sub.add_parser("touch", help="Boost an entry's vitality by accessing it")
+    tc.add_argument("entry_id", help="Entry ID to touch")
+
+    dc = sub.add_parser("decay", help="Apply time-based decay to all entries")
+
+    vy = sub.add_parser("vitality", help="Show an entry's vitality status")
+    vy.add_argument("entry_id", help="Entry ID to check")
+
+    fg = sub.add_parser("fading", help="Show most neglected entries (lowest vitality)")
+    fg.add_argument("-n", "--limit", type=int, default=10, help="Max entries to show")
+
+    vb = sub.add_parser("vibrant", help="Show most alive entries (highest vitality)")
+    vb.add_argument("-n", "--limit", type=int, default=10, help="Max entries to show")
+
     args = parser.parse_args()
     if not args.command:
         parser.print_help()
@@ -348,6 +424,12 @@ def main():
         "timeline": cmd_timeline,
         "neighbors": cmd_neighbors,
         "consolidate": cmd_consolidate,
+        "path": cmd_path,
+        "touch": cmd_touch,
+        "decay": cmd_decay,
+        "vitality": cmd_vitality,
+        "fading": cmd_fading,
+        "vibrant": cmd_vibrant,
     }
     dispatch[args.command](args)
 

nexus/mnemosyne/tests/test_cli_commands.py

@@ -0,0 +1,138 @@
+"""Tests for Mnemosyne CLI commands — path, touch, decay, vitality, fading, vibrant."""
+
+import json
+import tempfile
+from pathlib import Path
+from unittest.mock import patch
+import sys
+import io
+
+import pytest
+
+from nexus.mnemosyne.archive import MnemosyneArchive
+from nexus.mnemosyne.entry import ArchiveEntry
+
+
+@pytest.fixture
+def archive(tmp_path):
+    path = tmp_path / "test_archive.json"
+    return MnemosyneArchive(archive_path=path)
+
+
+@pytest.fixture
+def linked_archive(tmp_path):
+    """Archive with entries linked to each other for path testing."""
+    path = tmp_path / "test_archive.json"
+    arch = MnemosyneArchive(archive_path=path, auto_embed=False)
+    e1 = arch.add(ArchiveEntry(title="Alpha", content="first entry about python", topics=["code"]))
+    e2 = arch.add(ArchiveEntry(title="Beta", content="second entry about python coding", topics=["code"]))
+    e3 = arch.add(ArchiveEntry(title="Gamma", content="third entry about cooking recipes", topics=["food"]))
+    return arch, e1, e2, e3
+
+
+class TestPathCommand:
+    def test_shortest_path_exists(self, linked_archive):
+        arch, e1, e2, e3 = linked_archive
+        path = arch.shortest_path(e1.id, e2.id)
+        assert path is not None
+        assert path[0] == e1.id
+        assert path[-1] == e2.id
+
+    def test_shortest_path_no_connection(self, linked_archive):
+        arch, e1, e2, e3 = linked_archive
+        # e3 (cooking) likely not linked to e1 (python coding)
+        path = arch.shortest_path(e1.id, e3.id)
+        # Path may or may not exist depending on linking threshold
+        # Either None or a list is valid
+
+    def test_shortest_path_same_entry(self, linked_archive):
+        arch, e1, _, _ = linked_archive
+        path = arch.shortest_path(e1.id, e1.id)
+        assert path == [e1.id]
+
+    def test_shortest_path_missing_entry(self, linked_archive):
+        arch, e1, _, _ = linked_archive
+        path = arch.shortest_path(e1.id, "nonexistent-id")
+        assert path is None
+
+
+class TestTouchCommand:
+    def test_touch_boosts_vitality(self, archive):
+        entry = archive.add(ArchiveEntry(title="Test", content="Content"))
+        # Simulate time passing by setting old last_accessed
+        old_time = "2020-01-01T00:00:00+00:00"
+        entry.last_accessed = old_time
+        entry.vitality = 0.5
+        archive._save()
+
+        touched = archive.touch(entry.id)
+        assert touched.vitality > 0.5
+        assert touched.last_accessed != old_time
+
+    def test_touch_missing_entry(self, archive):
+        with pytest.raises(KeyError):
+            archive.touch("nonexistent-id")
+
+
+class TestDecayCommand:
+    def test_apply_decay_returns_stats(self, archive):
+        archive.add(ArchiveEntry(title="Test", content="Content"))
+        result = archive.apply_decay()
+        assert result["total_entries"] == 1
+        assert "avg_vitality" in result
+        assert "fading_count" in result
+        assert "vibrant_count" in result
+
+    def test_decay_on_empty_archive(self, archive):
+        result = archive.apply_decay()
+        assert result["total_entries"] == 0
+        assert result["avg_vitality"] == 0.0
+
+
+class TestVitalityCommand:
+    def test_get_vitality(self, archive):
+        entry = archive.add(ArchiveEntry(title="Test", content="Content"))
+        v = archive.get_vitality(entry.id)
+        assert v["entry_id"] == entry.id
+        assert v["title"] == "Test"
+        assert 0.0 <= v["vitality"] <= 1.0
+        assert v["age_days"] >= 0
+
+    def test_get_vitality_missing(self, archive):
+        with pytest.raises(KeyError):
+            archive.get_vitality("nonexistent-id")
+
+
+class TestFadingVibrant:
+    def test_fading_returns_sorted_ascending(self, archive):
+        # Add entries with different vitalities
+        e1 = archive.add(ArchiveEntry(title="Vibrant", content="High energy"))
+        e2 = archive.add(ArchiveEntry(title="Fading", content="Low energy"))
+        e2.vitality = 0.1
+        e2.last_accessed = "2020-01-01T00:00:00+00:00"
+        archive._save()
+
+        results = archive.fading(limit=10)
+        assert len(results) == 2
+        assert results[0]["vitality"] <= results[1]["vitality"]
+
+    def test_vibrant_returns_sorted_descending(self, archive):
+        e1 = archive.add(ArchiveEntry(title="Fresh", content="New"))
+        e2 = archive.add(ArchiveEntry(title="Old", content="Ancient"))
+        e2.vitality = 0.1
+        e2.last_accessed = "2020-01-01T00:00:00+00:00"
+        archive._save()
+
+        results = archive.vibrant(limit=10)
+        assert len(results) == 2
+        assert results[0]["vitality"] >= results[1]["vitality"]
+
+    def test_fading_limit(self, archive):
+        for i in range(15):
+            archive.add(ArchiveEntry(title=f"Entry {i}", content=f"Content {i}"))
+        results = archive.fading(limit=5)
+        assert len(results) == 5
+
+    def test_vibrant_empty(self, archive):
+        results = archive.vibrant()
+        assert results == []