From 2cb3ab69f41e68262c4c3e8379697811e28bc809 Mon Sep 17 00:00:00 2001
From: igerber <isaac.gerber@gmail.com>
Date: Tue, 17 Feb 2026 06:58:40 -0500
Subject: [PATCH] Bump version to 2.4.1

Update version numbers in __init__.py, pyproject.toml, and Cargo.toml.
Add CHANGELOG entry for v2.4.1 covering module splits, safe_inference
migration, tutorial additions, and bug fixes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 CHANGELOG.md          | 16 ++++++++++++++++
 diff_diff/__init__.py |  2 +-
 pyproject.toml        |  2 +-
 rust/Cargo.toml       |  2 +-
 4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c38c03ff..f111464f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.4.1] - 2026-02-17
+
+### Added
+- Tutorial notebook for Two-Stage DiD (Gardner 2022) (`docs/tutorials/12_two_stage_did.ipynb`)
+
+### Changed
+- Module splits for large files: ImputationDiD, TwoStageDiD, and TROP each split into separate results and bootstrap submodules
+- Migrated remaining inline inference computations to `safe_inference()` utility
+- Replaced `np.dot()` calls with `@` operator across codebase
+- Updated TODO.md and ROADMAP.md for accuracy post-v2.4.0
+
+### Fixed
+- Matplotlib import guards added to tutorials 11 and 12
+- Various bug fixes from code quality cleanup (diagnostics, estimators, linalg, staggered, sun_abraham, synthetic_did, triple_diff)
+
 ## [2.4.0] - 2026-02-16
 
 ### Added
@@ -739,6 +754,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `to_dict()` and `to_dataframe()` export methods
   - `is_significant` and `significance_stars` properties
 
+[2.4.1]: https://github.com/igerber/diff-diff/compare/v2.4.0...v2.4.1
 [2.4.0]: https://github.com/igerber/diff-diff/compare/v2.3.2...v2.4.0
 [2.3.2]: https://github.com/igerber/diff-diff/compare/v2.3.1...v2.3.2
 [2.3.1]: https://github.com/igerber/diff-diff/compare/v2.3.0...v2.3.1
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index 05e3f517..d40e675c 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -148,7 +148,7 @@
     load_mpdta,
 )
 
-__version__ = "2.4.0"
+__version__ = "2.4.1"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/pyproject.toml b/pyproject.toml
index 6e411d64..26794937 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "2.4.0"
+version = "2.4.1"
 description = "A library for Difference-in-Differences causal inference analysis"
 readme = "README.md"
 license = "MIT"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 3b7f6178..00e75504 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "2.4.0"
+version = "2.4.1"
 edition = "2021"
 description = "Rust backend for diff-diff DiD library"
 license = "MIT"