nixify: wire mnemosyne-memory + mnemosyne-hermes into hermes-agent build as extraPythonPackages

configuration.nix

@@ -47,6 +47,22 @@
             passthru = old.passthru // { doc = null; };
         });
     })
+    ## Overlay: add mnemosyne memory packages and inject into hermes-agent
+    (final: prev: let
+        mnemosynePkgs = final.callPackage ./mnemosyne.nix {
+          inherit (final.python312Packages) pyyaml fastembed sqlite-vec;
+        };
+        hermesWithExtra = prev.hermes-agent.override {
+          extraPythonPackages = [
+            mnemosynePkgs.mnemosyne-memory
+            mnemosynePkgs.mnemosyne-hermes
+          ];
+        };
+      in {
+        inherit (mnemosynePkgs) mnemosyne-memory mnemosyne-hermes;
+        hermes-agent = hermesWithExtra;
+      }
+    )
   ];
 
   ## Auto-upgrade

mnemosyne.nix

@@ -1,20 +1,21 @@
 # mnemosyne.nix — Mnemosyne memory packages for Hermes Agent
 # Provides: mnemosyne-memory (core) + mnemosyne-hermes (Hermes plugin)
+#
+# Called via python312Packages.callPackage — each dependency is auto-injected
+# as an individual python package. Do not add python312Packages as a param.
 {
   lib,
   buildPythonPackage,
   fetchPypi,
-  python312Packages,
-  # mnemosyne-memory dependencies (core)
+  setuptools,
+  wheel,
+  # mnemosyne-memory dependencies
   pyyaml,
-  # mnemosyne-memory[embeddings] extras
   fastembed,
   sqlite-vec,
 }:
 
 let
-  python = python312Packages;
-
   mnemosyne-memory = buildPythonPackage rec {
     pname = "mnemosyne-memory";
     version = "3.14.0";
@@ -31,12 +32,12 @@ let
       sqlite-vec
     ];
 
-    nativeBuildInputs = [ python.setuptools python.wheel ];
+    nativeBuildInputs = [ setuptools wheel ];
     doCheck = false;
     pythonImportsCheck = [ "mnemosyne" ];
 
     meta = {
-      description = "Zero-dependency AI memory that works everywhere. SQLite-backed. Sub-millisecond.";
+      description = "Zero-dependency AI memory. SQLite-backed. Sub-millisecond.";
       homepage = "https://github.com/mnemosyne-oss/mnemosyne";
       license = lib.licenses.mit;
     };
@@ -57,7 +58,7 @@ let
       pyyaml
     ];
 
-    nativeBuildInputs = [ python.setuptools python.wheel ];
+    nativeBuildInputs = [ setuptools wheel ];
     doCheck = false;
 
     meta = {