v2.2.1

What's Changed

• Fix NaN t-statistics across 7 locations for consistent undefined inference by @igerber in #118
• Align TROP lambda conventions with paper (Athey et al. 2025) by @igerber in #119
• Add git worktree management slash commands by @igerber in #120
• Add branch-cleanup slash command by @igerber in #122
• Fix worktree-new Rust backend rebuild: add maturin to dev deps and fix manifest path by @igerber in #121
• Fix worktree-rm: detect squash-merged branches via GitHub PR status by @igerber in #123
• Remove jackknife variance estimation from TROP by @igerber in #124
• Replace hardcoded GitHub URL in bump-version skill by @igerber in #127
• Remove LOOCV control observation subsampling from TROP by @igerber in #126
• Add /review-plan skill for staff-engineer plan review by @igerber in #128
• MultiPeriodDiD: full event-study specification with pre-period coefficients by @igerber in #125
• Update methodology review for MultiPeriodDiD by @igerber in #130
• Fix invalid baseRepository field in push-pr-update skill by @igerber in #131
• Add backend-aware test parameter scaling for pure Python CI by @igerber in #129
• Bump version to 2.2.1 by @igerber in #132

Full Changelog: v2.2.0...v2.2.1

v2.2.0

What's Changed

• Add Windows wheel builds using faer pure Rust linear algebra by @igerber in #115

Full Changelog: v2.1.9...v2.2.0

v2.1.9

What's Changed

• Add unified LOOCV for TROP joint method with Rust acceleration by @igerber in #113

Full Changelog: v2.1.8...v2.1.9

v2.1.8

What's Changed

• Align TROP with paper methodology (Equation 5, D matrix semantics) by @igerber in #110
• Add /push-pr-update skill for pushing PR revisions by @igerber in #111
• Release v2.1.8 by @igerber in #112

Full Changelog: v2.1.7...v2.1.8

v2.1.7

What's Changed

• Fix plot_event_study reference_period normalization by @igerber in #108

Full Changelog: v2.1.6...v2.1.7

v2.1.6

What's Changed

• Explain CS vs SA pre-period discrepancy in Tutorial 02 by @igerber in #102
• Fix 10 API discrepancies in quickstart.rst by @igerber in #103
• Include reference period (e=-1) in CS event study for universal base period by @igerber in #104
• Add comprehensive methodology verification tests for CallawaySantAnna by @igerber in #105
• Update REGISTRY.md with verified DifferenceInDifferences behavior by @igerber in #106
• Bump version to 2.1.6 by @igerber in #107

Full Changelog: v2.1.5...v2.1.6

v2.1.5

What's Changed

• Add methodology workflow checklist to CLAUDE.md by @igerber in #96
• Add base_period parameter to CallawaySantAnna for pre-treatment effects by @igerber in #97
• Add pre-merge-check skill and improve PR review workflow by @igerber in #98
• Update Tutorial 02: Add pre-trends section and fix DGP usage by @igerber in #99
• Add METHODOLOGY_REVIEW.md for tracking estimator review progress by @igerber in #100
• Bump version to 2.1.5 by @igerber in #101

Full Changelog: v2.1.4...v2.1.5

v2.1.4

What's Changed

• Add methodology registry and AI-powered PR review workflow by @igerber in #86
• Refactor staggered.py into multiple modules using mixins by @igerber in #88
• Add /submit-pr skill for automated PR creation by @igerber in #89
• Improve AI PR review workflow with inline comment support and security fixes by @igerber in #90
• Fix rank-deficient matrix handling in OLS solver by @igerber in #91
• Add development checklists and workflow improvements to CLAUDE.md by @igerber in #92
• Release v2.1.4 by @igerber in #93

Full Changelog: v2.1.3...v2.1.4

v2.1.3

What's Changed

• Update TODO.md with tech debt assessment findings by @igerber in #83
• Fix/trop paper conformance by @igerber in #84
• Bump version to 2.1.3 by @igerber in #85

Full Changelog: v2.1.2...v2.1.3

v2.1.2

What's Changed

• Add DGP functions to prep.py for all supported DiD designs by @igerber in #80

Full Changelog: v2.1.1...v2.1.2