From ec81f575c49980b82358f7d599755e9536928355 Mon Sep 17 00:00:00 2001
From: igerber <isaac.gerber@gmail.com>
Date: Sun, 15 Mar 2026 13:19:25 -0400
Subject: [PATCH] Bump version to 2.7.0 and add CHANGELOG entry

Add submit-pr step 10b to ensure PR ref exists after API creation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 .claude/commands/submit-pr.md | 20 ++++++++++++++++++++
 CHANGELOG.md                  | 24 ++++++++++++++++++++++++
 diff_diff/__init__.py         |  2 +-
 pyproject.toml                |  2 +-
 rust/Cargo.toml               |  2 +-
 5 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/.claude/commands/submit-pr.md b/.claude/commands/submit-pr.md
index d902032f..9866bf51 100644
--- a/.claude/commands/submit-pr.md
+++ b/.claude/commands/submit-pr.md
@@ -310,6 +310,26 @@ git remote get-url origin
 # Extract owner from URL
 ```
 
+### 10b. Ensure PR ref exists
+
+After PR creation, GitHub may not immediately create `refs/pull/<number>/head` (especially
+when the PR is created via API). Push a no-op to the branch to force ref creation:
+
+```bash
+git push <push-remote> <branch-name>
+```
+
+Then verify:
+```bash
+git ls-remote <push-remote> refs/pull/<number>/head
+```
+
+If still missing, push an empty commit:
+```bash
+git commit --allow-empty -m "Trigger PR ref creation"
+git push <push-remote> <branch-name>
+```
+
 ### 11. Report Results
 
 ```
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 21f97c7a..8f5287c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.7.0] - 2026-03-15
+
+### Added
+- **EfficientDiD estimator** (`EfficientDiD`) implementing Chen, Sant'Anna & Xie (2025) efficient DiD
+- CallawaySantAnna event study SEs (WIF-based) and simultaneous confidence bands (sup-t)
+- R comparison tests for event-study SEs and cband critical values
+- Non-finite outcome validation in `EfficientDiD.fit()`
+- CallawaySantAnna speed benchmarks with baseline results
+- Estimator alias documentation in README, quickstart, and API docs
+
 ### Changed
 - **BREAKING: TROP nuclear norm solver step size fix** — The proximal gradient
   threshold for the L matrix (both `method="global"` and `method="twostep"` with
@@ -17,6 +27,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   agreement with exact convex optimization solutions. Users with finite
   `lambda_nn` will observe different ATT estimates. Added FISTA/Nesterov
   acceleration to the twostep inner solver for faster L convergence.
+- Add (1-W) weight masking to TROP global method, rename joint→global
+- Optimize CallawaySantAnna covariate path with Cholesky and pscore caching
+- Update Codex AI review model from gpt-5.2-codex to gpt-5.4
+
+### Fixed
+- Fix CallawaySantAnna event study SEs (missing WIF) and simultaneous confidence bands
+- Fix analytical and bootstrap WIF pg scaling to use global N
+- Fix TROP nuclear norm solver threshold scaling for non-uniform weights
+- Fix stale coefficients in TROP global low-rank solver and NaN bootstrap poisoning
+- Fix NaN-cell preservation in CallawaySantAnna balance_e aggregation
+- Fix not-yet-treated cache keys and dropped-cell warning
+- Fix rank-deficiency handling with Cholesky rank checks and reduced-column solve
+- Fix Rust convergence criterion, n_valid_treated consistency, and NaN bootstrap SE
 
 ## [2.6.1] - 2026-03-08
 
@@ -865,6 +888,7 @@ 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
 
+[2.7.0]: https://github.com/igerber/diff-diff/compare/v2.6.1...v2.7.0
 [2.6.1]: https://github.com/igerber/diff-diff/compare/v2.6.0...v2.6.1
 [2.6.0]: https://github.com/igerber/diff-diff/compare/v2.5.0...v2.6.0
 [2.5.0]: https://github.com/igerber/diff-diff/compare/v2.4.3...v2.5.0
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index ec632204..b697d1b6 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -179,7 +179,7 @@
 Bacon = BaconDecomposition
 EDiD = EfficientDiD
 
-__version__ = "2.6.1"
+__version__ = "2.7.0"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/pyproject.toml b/pyproject.toml
index c7229784..b058d7e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "2.6.1"
+version = "2.7.0"
 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 e829042b..a96ddf24 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "2.6.1"
+version = "2.7.0"
 edition = "2021"
 description = "Rust backend for diff-diff DiD library"
 license = "MIT"