feat: add VectorChord (vchord) extension for PG17

Add VectorChord 1.1.0, a scalable disk-friendly vector search extension.
Requires pgrx 0.17.0 and Rust 1.90.0 — both bootstrapped via the
pgrx-hash tool and added to cargo-pgrx packages.

Author: h0lybyte

nix/cargo-pgrx/default.nix

@@ -82,5 +82,10 @@ in
     hash = "sha256-3TsNpEqNm3Uol5XPW1i0XEbP2fF2+RKB2d7lO6BDnvQ=";
     cargoHash = "sha256-LZUXhjMxkBs3O5feH4X5NQC7Qk4Ja6M5+sAYaSCikrY=";
   };
+  cargo-pgrx_0_17_0 = mkCargoPgrx {
+    version = "0.17.0";
+    hash = "sha256-Ld7m7ggxlf8FufpeiAE9qcu49X0SgX6XXHS6KIewGyA=";
+    cargoHash = "sha256-hNj39YzJna8iZxnlrLz+uLduxaD+uvggQRM7ng3MN1k=";
+  };
   inherit mkCargoPgrx;
 }

nix/cargo-pgrx/versions.json

@@ -115,5 +115,13 @@
         "cargoHash": "sha256-95DHq5GLnAqb3bbKwwaeBeKEmkfRh81ZTRaJ7L59DAg="
       }
     }
+  },
+  "0.17.0": {
+    "hash": "sha256-Ld7m7ggxlf8FufpeiAE9qcu49X0SgX6XXHS6KIewGyA=",
+    "rust": {
+      "1.90.0": {
+        "cargoHash": "sha256-hNj39YzJna8iZxnlrLz+uLduxaD+uvggQRM7ng3MN1k="
+      }
+    }
   }
 }

nix/ext/vectorchord.nix

@@ -0,0 +1,59 @@
+{
+  lib,
+  stdenv,
+  callPackages,
+  postgresql,
+  rust-bin,
+}:
+let
+  pname = "vchord";
+  version = "1.1.0";
+  rustVersion = "1.90.0";
+  pgrxVersion = "0.17.0";
+
+  cargo = rust-bin.stable.${rustVersion}.default;
+  mkPgrxExtension = callPackages ../cargo-pgrx/mkPgrxExtension.nix {
+    inherit rustVersion pgrxVersion;
+  };
+
+  src = builtins.fetchGit {
+    url = "https://github.com/tensorchord/VectorChord.git";
+    rev = "c68a6aec9446899d0ab22662968053bd2820ddd4";
+    shallow = true;
+  };
+in
+mkPgrxExtension {
+  inherit
+    pname
+    version
+    postgresql
+    src
+    ;
+
+  nativeBuildInputs = [ cargo ];
+  buildInputs = [ postgresql ];
+
+  cargoLock = {
+    lockFile = "${src}/Cargo.lock";
+    allowBuiltinFetchGit = true;
+  };
+
+  buildFeatures = [ "pg17" ];
+
+  CARGO = "${cargo}/bin/cargo";
+
+  env = lib.optionalAttrs stdenv.isDarwin {
+    POSTGRES_LIB = "${postgresql}/lib";
+    RUSTFLAGS = "-C link-arg=-undefined -C link-arg=dynamic_lookup";
+  };
+
+  doCheck = false;
+  auditable = false;
+
+  meta = with lib; {
+    description = "Scalable, fast, and disk-friendly vector search for Postgres";
+    homepage = "https://github.com/tensorchord/VectorChord";
+    platforms = postgresql.meta.platforms;
+    license = licenses.agpl3Plus;
+  };
+}

nix/packages/default.nix

@@ -110,6 +110,7 @@
             cargo-pgrx_0_12_6
             cargo-pgrx_0_12_9
             cargo-pgrx_0_14_3
+            cargo-pgrx_0_17_0
             ;
         }
         // lib.optionalAttrs pkgs.stdenv.isDarwin {

nix/packages/postgres.nix

@@ -61,7 +61,7 @@
       ) ourExtensions;
 
       orioledbExtensions = orioleFilteredExtensions ++ [ ../ext/orioledb.nix ];
-      dbExtensions17 = orioleFilteredExtensions ++ [ ../ext/kilobase.nix ];
+      dbExtensions17 = orioleFilteredExtensions ++ [ ../ext/kilobase.nix ../ext/vectorchord.nix ];
 
       # CLI extensions - minimal set for Supabase CLI with migration support
       cliExtensions = [