diff --git a/lefthook.yml b/lefthook.yml
index 0687e78972..27c29ce3a2 100644
--- a/lefthook.yml
+++ b/lefthook.yml
@@ -51,3 +51,6 @@ pre-commit:
       glob: "*.rs"
       run: cargo fmt
       stage_fixed: true
+    cargo-toml-order:
+      glob: "**/Cargo.toml"
+      run: python3 tools/internal/check_cargo_toml_field_order.py {staged_files}
diff --git a/nym-wallet/src-tauri/Cargo.toml b/nym-wallet/src-tauri/Cargo.toml
index f2385aa02f..1a17b80962 100644
--- a/nym-wallet/src-tauri/Cargo.toml
+++ b/nym-wallet/src-tauri/Cargo.toml
@@ -7,8 +7,8 @@ edition = "2021"
 license = ""
 repository = ""
 rust-version = "1.85"
-default-run = "NymWallet"
 build = "src/build.rs"
+default-run = "NymWallet"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/tools/internal/check_cargo_toml_field_order.py b/tools/internal/check_cargo_toml_field_order.py
new file mode 100644
index 0000000000..b91fd62682
--- /dev/null
+++ b/tools/internal/check_cargo_toml_field_order.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Check that [package] fields in Cargo.toml follow canonical ordering."""
+import re, sys
+
+ORDER = [
+    "name", "description", "version", "authors", "edition", "license",
+    "repository", "homepage", "documentation", "rust-version", "readme",
+    "publish", "keywords", "exclude", "build", "links", "default-run",
+    "resolver",
+]
+
+bad = []
+for path in sys.argv[1:]:
+    fields, in_pkg = [], False
+    for line in open(path):
+        s = line.strip()
+        if s == "[package]":
+            in_pkg = True
+            continue
+        if in_pkg and s.startswith("["):
+            break
+        if in_pkg:
+            m = re.match(r"^(\w[\w-]*)", s)
+            if m and "=" in line:
+                fields.append(m.group(1))
+    unknown = [f for f in fields if f not in ORDER]
+    if unknown:
+        bad.append((path, f"unknown field(s): {', '.join(unknown)}"))
+        continue
+    expected = sorted(fields, key=ORDER.index)
+    if fields != expected:
+        first = next(a for a, b in zip(fields, expected) if a != b)
+        bad.append((path, f"first mismatch: '{first}'"))
+
+if bad:
+    print("[package] fields out of canonical order:")
+    for path, reason in bad:
+        print(f"  {path}  ({reason})")
+    print("\nCanonical order:")
+    for f in ORDER:
+        print(f"  - {f}")
+    sys.exit(1)