Release 1.0.1: metadata merge semantics and Nix opt-in

Author: neilberkman

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.1] - 2026-02-27
+
+### Fixed
+
+- Metadata updates now use Stripe merge semantics: new keys are merged into existing metadata instead of replacing the entire map, and keys set to empty string are deleted.
+
+### Changed
+
+- Nix/direnv developer setup is now opt-in (not auto-activated).
+
 ## [1.0.0] - 2026-02-13
 
 ### Added

mix.exs

@@ -2,7 +2,7 @@ defmodule PaperTiger.MixProject do
   @moduledoc false
   use Mix.Project
 
-  @version "1.0.0"
+  @version "1.0.1"
   @url "https://github.com/EnaiaInc/paper_tiger"
   @maintainers ["Enaia Inc"]