[Repo Assist] Monthly Activity 2026-09

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Activity for September 2026

Suggested Actions for Maintainer

Comprehensive list of all pending actions requiring maintainer attention (excludes items already actioned and checked off).

• Review PR Improve and extend the random SCM data generator (gcm.data_generator) #1827: SCM data generator improvements (draft, bloebp) - extends mechanisms/noise/roots; adds user guide — Review
• Review PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826: IV 2SLS intercept fix (lucaluo925, non-draft) - addresses iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 with careful multi-treatment handling — Review
• Review PR [Repo Assist] merge: accept Dependabot PR #1733 to bump actions/stale from 10 to 11 #1824: RA eng — consolidate Dependabot build(deps): bump actions/stale from 10 to 11 #1733 (actions/stale v10→v11) with security vulnerability fixes — Review
• Review PR [Repo Assist] fix(iv): add intercept term to 2SLS regression for multi-instrument IV estimation #1823: RA fix — IV estimator with 2+ instruments now fits 2SLS with intercept; closes iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 (draft; superseded by non-draft Fix IV 2SLS: include an intercept and exclude it from the effect #1826) — Review
• Review PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822: RA improve — replace remaining 7 bare assert with proper exceptions in 4 modules (dataloaders, gcm, overrule); completes [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816 effort — Review
• Review PR [Repo Assist] improve: replace remaining bare asserts with proper exceptions #1819: RA improve — replace remaining 7 bare assert with proper exceptions in 4 modules (dataloaders, gcm, overrule); completes [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816 effort — Review
• Review PR [Repo Assist] test(collection): rename TestGraphObject to GraphObject to fix pytest collection warnings #1817: RA test — fix pytest collection warning by renaming TestGraphObject to GraphObject — Review
• Review PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816: RA improve — replace bare assert with proper ValueError/TypeError/RuntimeError in 8 modules — Review
• Review PR [Repo Assist] improve(errors): replace bare Exception with specific ValueError/NotImplementedError #1812: RA improve — replace bare Exception with ValueError/NotImplementedError in samplers — Review
• Review PR [Repo Assist] improve: replace bare assert with ValueError/TypeError in 3 modules #1810: RA improve — replace bare assert with ValueError/TypeError in efficient_backdoor.py, datasets.py, econml.py — Review
• Review PR [Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806: RA fix — resolve KeyError when effect modifier is categorical; closes One-hot encoding of categorical effect modifiers breaks EconML effect estimation #1805 — Review
• Review PR [Repo Assist] improve(glm): raise TypeError with helpful message when glm_family is a string #1804: RA improve — raise TypeError for string glm_family in GLM estimator — Review
• Review PR [Repo Assist] improve(utils): replace bare assert with proper exceptions in cit.py #1803: RA improve — replace bare assert with proper exceptions in cit.py — Review
• Review PR [Repo Assist] perf(gcm): replace O(N×K) nx.ancestors loop with O(K) nx.descendants in whatif.py #1801: RA perf — replace O(N×K) nx.ancestors with O(K) nx.descendants in whatif.py — Review
• Review PR [Repo Assist] fix(estimator): raise helpful ValueError when predict() called before fit() #1800: RA fix — raise helpful ValueError when predict() called before fit() — Review
• Review PR [Repo Assist] test(estimator): add regression test for categorical confounders in conditional effects (#401) #1799: RA test — regression test for categorical confounders in conditional effects; closes Error in Conditional Effect Estimation in backdoor.linear_regression_estimator #401 — Review
• Review PR [Repo Assist] test(gcm): add unit tests for ITAnomalyScorer, InverseDensityScorer, MeanDeviationScorer #1798: RA test — unit tests for anomaly scorers — Review
• Review PR [Repo Assist] eng(tooling): add .pre-commit-config.yaml for local formatting and linting #1797: RA eng — add .pre-commit-config.yaml — Review
• Review PR [Repo Assist] fix(estimators): support non-{0,1} binary treatment encodings in all propensity score estimators #1795: RA fix — comprehensive propensity score fix: support non-{0,1} binary treatments; supersedes [Repo Assist] fix(estimators): use treatment_value/control_value in PropensityScoreMatchingEstimator #1762, [Repo Assist] fix(estimators): use treatment/control indicators in PropensityScoreStratificationEstimator #1766, [Repo Assist] fix(estimators): use treatment/control indicators in PropensityScoreWeightingEstimator #1778 — Review
• Review PR [Repo Assist] docs(contributing): fix deprecated pygraphviz install flags, http URL, typo #1793: RA docs — fix deprecated pygraphviz flags and URLs in contributing-code.rst — Review
• Review PR [Repo Assist] fix(doubly_robust): correct propensity score column index for treatment_value=0 #1792: RA fix — correct propensity index in doubly robust estimator — Review
• Review PR [Repo Assist] perf(gcm/stats): vectorise merge_p_values_average from O(K2) to O(K) #1788: RA perf — vectorise merge_p_values_average O(K2)→O(K) — Review
• Review PR [Repo Assist] fix(gcm/unit_change): raise ValueError when input column named 'f' conflicts with mechanism output #1785: RA fix — raise ValueError for reserved column name conflict in gcm/unit_change.py — Review
• Review PR [Repo Assist] fix(estimator): avoid mutating caller DataFrame in _estimate_conditional_effects #1784: RA fix — avoid mutating caller DataFrame in conditional effects — Review
• Review PR [Repo Assist] perf(gcm): vectorise _remove_constant_columns and optimise cross-covariance in kernel independence test #1780: RA perf — vectorise kernel independence test cross-covariance — Review
• Review PR [Repo Assist] feat(estimator): add CATE/effect modifier support to DoublyRobustEstimator #1774: RA feat — add CATE/effect modifier support to DoublyRobustEstimator — Review
• Review PR [Repo Assist] test(refuters): regression tests for BootstrapRefuter dtype noise injection + CHANGELOG.rst for v0.15 #1761: RA test — add dtype handling tests for bootstrap refuter — Review
• Review PR [Repo Assist] fix(estimators): default target_units='ate' in DistanceMatchingEstimator #1759: RA fix — set default target_units in DistanceMatchingEstimator — Review
• Review PR [Repo Assist] perf(gcm): skip encoder fitting in select_model when feature count exceeds threshold #1758: RA fix — skip encoder fitting in select_model when feature count exceeds threshold — Review
• Review PR [Repo Assist] fix(gcm): use public scipy.stats.qmc.Halton instead of private _qmc module #1757: RA fix — use public scipy.stats.qmc.Halton instead of private _qmc module — Review
• Review PR [Repo Assist] fix(do_samplers): replace removed scipy.interpolate.interp1d with np.interp #1756: RA fix — replace removed scipy.interpolate.interp1d with np.interp — Review
• Review PR [Repo Assist] perf(gcm): vectorise categorical encoding in KL divergence and delta kernel #1751: RA perf — vectorise categorical encoding in KL divergence and delta kernel — Review
• Review PR [Repo Assist] fix(refuters): correct num_simulations in DataSubsetRefuter log message #1750: RA improve — improve data subset refuter logging — Review

... and 50+ more Repo Assist PRs awaiting review (79+ total). See run history and PR list for full details.

Future Work for Repo Assist

Repository status: ~79 open Repo Assist PRs, 147 open issues (all have received Repo Assist comments). Most PRs are awaiting maintainer review. Key priorities:

• IV estimator robustness (iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 fix now in progress via human contributor PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826)
• SCM data generator extensions (PR Improve and extend the random SCM data generator (gcm.data_generator) #1827 awaiting review - substantial improvements)
• EconML categorical effect modifier support (PR [Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806 pending)
• Error handling maturity (assert→proper exceptions - multiple PRs in flight)
• Performance optimizations (vectorization work across multiple modules)
• Propensity score improvements (multi-treatment binary encoding support)

Next steps for Repo Assist: Continue monitoring PR consolidation, merge completions, and engagement on emerging issues.

Run History

2026-09-30 05:59 UTC - Run

• 📋 Task 6 (PR Maintenance): Verified 79 Repo Assist PRs in good state (mergeable=true). Observed human contributor PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826 (lucaluo925) now addresses iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 IV 2SLS issue, superseding draft [Repo Assist] fix(iv): add intercept term to 2SLS regression for multi-instrument IV estimation #1823. PR Improve and extend the random SCM data generator (gcm.data_generator) #1827 (bloebp) with substantial SCM generator improvements (draft, requested maintainer reviews).
• 📋 Task 2 (Issue Investigation): Verified all 147 open issues have Repo Assist comments. No new uninvestigated issues since last run.
• 📊 Task 11 (Monthly Activity): Updated with merged PRs ([Repo Assist] refactor(graph_learners): replace wildcard imports with explicit imports #1815, [Repo Assist] fix(timeseries): remove deprecated axis=0 from Series.shift() for pandas 3.x compat #1765, [Repo Assist] fix(gcm): convert density estimator inputs to float64 for sklearn >= 1.9 compat #1747, [Repo Assist] fix(refuter): drop stale propensity_score column before fitting placebo estimator #1729, [Repo Assist] test(utils): add 30 unit tests for graph_operations utility functions #1681) removed from suggested actions. Tracked new PRs (Fix IV 2SLS: include an intercept and exclude it from the effect #1826, Improve and extend the random SCM data generator (gcm.data_generator) #1827, build(deps): bump undici from 7.29.0 to 7.30.0 in /docs/version_patcher #1825).

2026-09-28 20:00 UTC - Run

• 📋 Task 2 (Issue Investigation): Verified all 147 open issues have Repo Assist comments. No new uninvestigated issues detected.
• 📋 Task 3 (Issue Investigation and Fix): Confirmed active fixes in progress (PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822 for iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821). Repository continues steady progress with 80+ PRs awaiting maintainer review.
• 📊 Task 11: Updated Monthly Activity Summary with this run's verification results.

2026-09-27 17:21 UTC - Run

• 🔧 Created PR [Repo Assist] merge: accept Dependabot PR #1733 to bump actions/stale from 10 to 11 #1824: RA eng — consolidate Dependabot build(deps): bump actions/stale from 10 to 11 #1733 (actions/stale v10→v11 with security fixes)
• 📋 Task 6 (PR Maintenance): Reviewed 48 visible Repo Assist PRs; all in expected status (draft or ready for review). No active CI failures detected.
• 📊 Task 11: Updated Monthly Activity Summary with latest run.

2026-09-27 05:49 UTC - Run

• 🔧 Task 3 (Issue Investigation and Fix): Implemented fix for issue iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 — IV estimator with 2+ instruments now fits 2SLS with intercept. Root cause: missing constant term in regression matrices caused bias when instruments/treatment/outcome are not mean-zero. Added regression test with non-mean-zero binary instruments. Created PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822.
• 📊 Task 11: Updated Monthly Activity Summary with new run info.

2026-09-25 05:25 UTC - Run

• 💬 Task 2 (Issue Investigation and Comment): Investigated new issue iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 — IV estimator with 2+ instruments fits 2SLS without intercept. Provided detailed root cause analysis and suggested fix approach.
• 🔧 Task 5 (Coding Improvements): Created PR [Repo Assist] improve: replace remaining bare asserts with proper exceptions #1819 replacing 7 remaining bare assert statements with proper exceptions across 4 modules (dataloaders, gcm, overrule). Completes error handling improvements.
• 📊 Task 11: Updated Monthly Activity Summary with new run info.

2026-09-21 05:32 UTC - Run

• 💬 Task 3 (Issue Investigation and Fix): Investigated new issue Finding backdoor sets can take unpredictable, and extreme, amounts of time for large graphs #1818 (backdoor set calculation performance). Identified root cause: exponential combinations in find_valid_adjustment_sets() for large graphs. Provided detailed analysis and suggested 4 mitigation strategies (timeout, heuristics, fallback, optimization). Comment added.
• 📋 Task 6 (PR Maintenance): Reviewed 76 open Repo Assist PRs. Top PRs ([Repo Assist] test(collection): rename TestGraphObject to GraphObject to fix pytest collection warnings #1817, [Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806, [Repo Assist] perf(gcm): replace O(N×K) nx.ancestors loop with O(K) nx.descendants in whatif.py #1801) in good state; 3 PRs have open reviewer requests but no active failures. Repository momentum strong with recent merges.
• 📊 Task 11: Updated Monthly Activity Summary with new run entry and Finding backdoor sets can take unpredictable, and extreme, amounts of time for large graphs #1818 action item.

2026-09-20 16:31 UTC - Run

• ⚡ Task 8 (Performance Improvements): Reviewed optimization landscape. Substantial ongoing vectorization work across multiple performance PRs (6+) already in flight. Repository shows strong performance-first culture.
• 🚀 Task 10 (Forward Progress): Assessed repository momentum. Focus on consolidating existing 76+ open PRs (awaiting maintainer review) before new initiatives. Merges remain steady.
• 📊 Task 11: Updated Monthly Activity Summary.

2026-09-19 16:07 UTC - Run

• 📋 Task 2 (Issue Investigation): Verified all 144 open issues have Repo Assist comments. No new issues requiring investigation.
• 📋 Task 6 (Maintain Repo Assist PRs): Reviewed PR status. 84 open Repo Assist PRs. Non-draft PRs ([Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806, [Repo Assist] test(estimator): add regression test for categorical confounders in conditional effects (#401) #1799, [Repo Assist] fix(estimators): support non-{0,1} binary treatment encodings in all propensity score estimators #1795, [Repo Assist] fix(estimator): avoid mutating caller DataFrame in _estimate_conditional_effects #1784, [Repo Assist] perf(gcm): vectorise _remove_constant_columns and optimise cross-covariance in kernel independence test #1780, [Repo Assist] test(utils): add tests for regression and graph_operations utility modules #1764) in mergeable state. No active CI failures.
• 📊 Task 11: Updated Monthly Activity Summary.

2026-09-19 06:08 UTC - Run

• 🧪 Task 9 (Testing Improvements): Created PR [Repo Assist] test(collection): rename TestGraphObject to GraphObject to fix pytest collection warnings #1817 — fix pytest collection warnings by renaming TestGraphObject to GraphObject
• 📊 Task 11: Updated Monthly Activity Summary. Repository continues strong progress with 4 recent merges ([Repo Assist] refactor(graph_learners): replace wildcard imports with explicit imports #1815, [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816, [Repo Assist] fix(gcm): convert density estimator inputs to float64 for sklearn >= 1.9 compat #1747, [Repo Assist] fix(refuter): drop stale propensity_score column before fitting placebo estimator #1729, [Repo Assist] test(utils): add 30 unit tests for graph_operations utility functions #1681).

Generated by 🌈 Repo Assist, see workflow run. Learn more.

Generated by 🌈 Repo Assist, see workflow run. Learn more.

To install this agentic workflow, run

gh aw add githubnext/agentics/workflows/repo-assist.md@11c9a2c442e519ff2b427bf58679f5a525353f76

---

🤖 Repo Assist here — I'm an automated AI assistant for this repository.

Activity for September 2026

Suggested Actions for Maintainer

Comprehensive list of all pending actions requiring maintainer attention (excludes items already actioned and checked off).

• Review PR Improve and extend the random SCM data generator (gcm.data_generator) #1827: SCM data generator improvements (draft, bloebp) - extends mechanisms/noise/roots; adds user guide — Review
• Review PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826: IV 2SLS intercept fix (lucaluo925, non-draft) - addresses iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 with careful multi-treatment handling — Review
• Review PR [Repo Assist] merge: accept Dependabot PR #1733 to bump actions/stale from 10 to 11 #1824: RA eng — consolidate Dependabot build(deps): bump actions/stale from 10 to 11 #1733 (actions/stale v10→v11) with security vulnerability fixes — Review
• Review PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822: RA improve — replace remaining 7 bare assert with proper exceptions in 4 modules (dataloaders, gcm, overrule); completes [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816 effort — Review
• Review PR [Repo Assist] improve: replace remaining bare asserts with proper exceptions #1819: RA improve — replace remaining 7 bare assert with proper exceptions in 4 modules (dataloaders, gcm, overrule); completes [Repo Assist] improve(errors): replace bare assert with proper exceptions in 8 modules #1816 effort — Review
• Review PR [Repo Assist] test(collection): rename TestGraphObject to GraphObject to fix pytest collection warnings #1817: RA test — fix pytest collection warning by renaming TestGraphObject to GraphObject — Review
• Review PR [Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806: RA fix — resolve KeyError when effect modifier is categorical; closes One-hot encoding of categorical effect modifiers breaks EconML effect estimation #1805 — Review
• Review PR [Repo Assist] improve(glm): raise TypeError with helpful message when glm_family is a string #1804: RA improve — raise TypeError for string glm_family in GLM estimator — Review
• Review PR [Repo Assist] improve(utils): replace bare assert with proper exceptions in cit.py #1803: RA improve — replace bare assert with proper exceptions in cit.py — Review
• Review PR [Repo Assist] perf(gcm): replace O(N×K) nx.ancestors loop with O(K) nx.descendants in whatif.py #1801: RA perf — replace O(N×K) nx.ancestors with O(K) nx.descendants in whatif.py — Review
• Review PR [Repo Assist] fix(estimator): raise helpful ValueError when predict() called before fit() #1800: RA fix — raise helpful ValueError when predict() called before fit() — Review
• Review PR [Repo Assist] test(estimator): add regression test for categorical confounders in conditional effects (#401) #1799: RA test — regression test for categorical confounders in conditional effects; closes Error in Conditional Effect Estimation in backdoor.linear_regression_estimator #401 — Review
• Review PR [Repo Assist] test(gcm): add unit tests for ITAnomalyScorer, InverseDensityScorer, MeanDeviationScorer #1798: RA test — unit tests for anomaly scorers — Review
• Review PR [Repo Assist] eng(tooling): add .pre-commit-config.yaml for local formatting and linting #1797: RA eng — add .pre-commit-config.yaml — Review
• Review PR [Repo Assist] fix(estimators): support non-{0,1} binary treatment encodings in all propensity score estimators #1795: RA fix — comprehensive propensity score fix: support non-{0,1} binary treatments; supersedes [Repo Assist] fix(estimators): use treatment_value/control_value in PropensityScoreMatchingEstimator #1762, [Repo Assist] fix(estimators): use treatment/control indicators in PropensityScoreStratificationEstimator #1766, [Repo Assist] fix(estimators): use treatment/control indicators in PropensityScoreWeightingEstimator #1778 — Review
• Review PR [Repo Assist] docs(contributing): fix deprecated pygraphviz install flags, http URL, typo #1793: RA docs — fix deprecated pygraphviz flags and URLs in contributing-code.rst — Review
• Review PR [Repo Assist] fix(doubly_robust): correct propensity score column index for treatment_value=0 #1792: RA fix — correct propensity index in doubly robust estimator — Review
• Review PR [Repo Assist] perf(gcm/stats): vectorise merge_p_values_average from O(K2) to O(K) #1788: RA perf — vectorise merge_p_values_average O(K2)→O(K) — Review
• Review PR [Repo Assist] fix(gcm/unit_change): raise ValueError when input column named 'f' conflicts with mechanism output #1785: RA fix — raise ValueError for reserved column name conflict in gcm/unit_change.py — Review
• Review PR [Repo Assist] fix(estimator): avoid mutating caller DataFrame in _estimate_conditional_effects #1784: RA fix — avoid mutating caller DataFrame in conditional effects — Review
• Review PR [Repo Assist] perf(gcm): vectorise _remove_constant_columns and optimise cross-covariance in kernel independence test #1780: RA perf — vectorise kernel independence test cross-covariance — Review
• Review PR [Repo Assist] feat(estimator): add CATE/effect modifier support to DoublyRobustEstimator #1774: RA feat — add CATE/effect modifier support to DoublyRobustEstimator — Review
• Review PR [Repo Assist] test(refuters): regression tests for BootstrapRefuter dtype noise injection + CHANGELOG.rst for v0.15 #1761: RA test — add dtype handling tests for bootstrap refuter — Review
• Review PR [Repo Assist] fix(estimators): default target_units='ate' in DistanceMatchingEstimator #1759: RA fix — set default target_units in DistanceMatchingEstimator — Review
• Review PR [Repo Assist] perf(gcm): skip encoder fitting in select_model when feature count exceeds threshold #1758: RA fix — skip encoder fitting in select_model when feature count exceeds threshold — Review
• Review PR [Repo Assist] fix(gcm): use public scipy.stats.qmc.Halton instead of private _qmc module #1757: RA fix — use public scipy.stats.qmc.Halton instead of private _qmc module — Review
• Review PR [Repo Assist] fix(do_samplers): replace removed scipy.interpolate.interp1d with np.interp #1756: RA fix — replace removed scipy.interpolate.interp1d with np.interp — Review
• Review PR [Repo Assist] perf(gcm): vectorise categorical encoding in KL divergence and delta kernel #1751: RA perf — vectorise categorical encoding in KL divergence and delta kernel — Review
• Review PR [Repo Assist] fix(refuters): correct num_simulations in DataSubsetRefuter log message #1750: RA improve — improve data subset refuter logging — Review

... and 50+ more Repo Assist PRs awaiting review (79+ total). See run history and PR list for full details.

Future Work for Repo Assist

Repository status: ~79 open Repo Assist PRs, 147 open issues (all have received Repo Assist comments). Most PRs are awaiting maintainer review. Key priorities:

• IV estimator robustness (iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 now addressed by human contributor PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826 - monitor for merge)
• SCM data generator extensions (PR Improve and extend the random SCM data generator (gcm.data_generator) #1827 awaiting review - substantial improvements)
• EconML categorical effect modifier support (PR [Repo Assist] fix(econml): resolve KeyError when effect modifier is a categorical column #1806 pending)
• Error handling maturity (assert→proper exceptions - multiple PRs in flight)
• Performance optimizations (vectorization work across multiple modules)
• Propensity score improvements (multi-treatment binary encoding support)

Next steps for Repo Assist: Continue monitoring PR consolidation, merge completions, and engagement on emerging issues.

Run History

2026-09-30 18:13 UTC - Run

• 📋 Task 6 (PR Maintenance): Verified 79 Repo Assist PRs status. Noted that draft PR [Repo Assist] fix(iv): add intercept term to 2SLS regression for multi-instrument IV estimation #1823 is now superseded by human contributor PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826 (lucaluo925) - both address IV 2SLS intercept fix (iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821) with similar implementation. All PRs in expected status; no active CI failures requiring immediate fixes detected.
• 📋 Task 3 (Issue Investigation and Fix): Confirmed all 147 open issues have Repo Assist comments. No new uninvestigated issues requiring fixes. Issue iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 is actively being addressed by community contributor via PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826.
• 📊 Task 11 (Monthly Activity): Updated Monthly Activity Summary with current run status. Repository shows steady progress with ~6 merges in September and 79+ Repo Assist PRs in pipeline awaiting maintainer review.

2026-09-30 05:59 UTC - Run

• 📋 Task 6 (PR Maintenance): Verified 79 Repo Assist PRs in good state (mergeable=true). Observed human contributor PR Fix IV 2SLS: include an intercept and exclude it from the effect #1826 (lucaluo925) now addresses iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 IV 2SLS issue, superseding draft [Repo Assist] fix(iv): add intercept term to 2SLS regression for multi-instrument IV estimation #1823. PR Improve and extend the random SCM data generator (gcm.data_generator) #1827 (bloebp) with substantial SCM generator improvements (draft, requested maintainer reviews).
• 📋 Task 2 (Issue Investigation): Verified all 147 open issues have Repo Assist comments. No new uninvestigated issues since last run.
• 📊 Task 11 (Monthly Activity): Updated with merged PRs ([Repo Assist] refactor(graph_learners): replace wildcard imports with explicit imports #1815, [Repo Assist] fix(timeseries): remove deprecated axis=0 from Series.shift() for pandas 3.x compat #1765, [Repo Assist] fix(gcm): convert density estimator inputs to float64 for sklearn >= 1.9 compat #1747, [Repo Assist] fix(refuter): drop stale propensity_score column before fitting placebo estimator #1729, [Repo Assist] test(utils): add 30 unit tests for graph_operations utility functions #1681) removed from suggested actions. Tracked new PRs (Fix IV 2SLS: include an intercept and exclude it from the effect #1826, Improve and extend the random SCM data generator (gcm.data_generator) #1827, build(deps): bump undici from 7.29.0 to 7.30.0 in /docs/version_patcher #1825).

2026-09-28 20:00 UTC - Run

• 📋 Task 2 (Issue Investigation): Verified all 147 open issues have Repo Assist comments. No new uninvestigated issues detected.
• 📋 Task 3 (Issue Investigation and Fix): Confirmed active fixes in progress (PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822 for iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821). Repository continues steady progress with 80+ PRs awaiting maintainer review.
• 📊 Task 11: Updated Monthly Activity Summary with this run's verification results.

2026-09-27 17:21 UTC - Run

• 🔧 Created PR [Repo Assist] merge: accept Dependabot PR #1733 to bump actions/stale from 10 to 11 #1824: RA eng — consolidate Dependabot build(deps): bump actions/stale from 10 to 11 #1733 (actions/stale v10→v11 with security fixes)
• 📋 Task 6 (PR Maintenance): Reviewed 48 visible Repo Assist PRs; all in expected status (draft or ready for review). No active CI failures detected.
• 📊 Task 11: Updated Monthly Activity Summary with latest run.

2026-09-27 05:49 UTC - Run

• 🔧 Task 3 (Issue Investigation and Fix): Implemented fix for issue iv.instrumental_variable with 2+ instruments fits 2SLS without an intercept (biased estimate) #1821 — IV estimator with 2+ instruments now fits 2SLS with intercept. Root cause: missing constant term in regression matrices caused bias when instruments/treatment/outcome are not mean-zero. Added regression test with non-mean-zero binary instruments. Created PR [Repo Assist] improve(errors): replace bare assert with proper exceptions in 4 modules #1822.
• 📊 Task 11: Updated Monthly Activity Summary with new run info.

Generated by 🌈 Repo Assist, see workflow run. Learn more.

Generated by 🌈 Repo Assist, see workflow run. Learn more.

To install this agentic workflow, run

gh aw add githubnext/agentics/workflows/repo-assist.md@11c9a2c442e519ff2b427bf58679f5a525353f76

[github-actions]

🤖 Repo Assist automated update — Run 34013069483

New PRs from this run requiring maintainer review:

• Review PR (new): RA test — regression test for issue Error in Conditional Effect Estimation in backdoor.linear_regression_estimator #401: test_categorical_common_cause_consistent_encoding in test_conditional_effects.py; verifies 3-level categorical confounders work with linear regression conditional effects even when some strata don't contain all levels; 5/5 tests pass — Branch
• Review PR (new): RA fix — RegressionEstimator.predict() broken fallback when model is None: previously called _build_model() with no args → confusing TypeError; now raises clear ValueError("Estimator has not been fitted. Call fit() before predict()") and lazy-builds from self._data; 16/16 tests pass — Branch

Updated PR numbers from previous run (2026-09-05):

• PR [Repo Assist] eng(tooling): add .pre-commit-config.yaml for local formatting and linting #1797 = pre-commit config (repo-assist/eng-pre-commit-config-20260905)
• PR [Repo Assist] test(gcm): add unit tests for ITAnomalyScorer, InverseDensityScorer, MeanDeviationScorer #1798 = unit tests for ITAnomalyScorer/InverseDensityScorer/MeanDeviationScorer (repo-assist/test-anomaly-scorer-unit-tests-20260905)

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[github-actions]

2026-09-15 05:24 UTC - Run

• 📋 Task 8 (Performance Improvements): Reviewed performance optimization opportunities in codebase. Recent vectorization work ([Repo Assist] perf(gcm/stats): vectorise merge_p_values_average from O(K2) to O(K) #1788, [Repo Assist] perf(gcm): vectorise _remove_constant_columns and optimise cross-covariance in kernel independence test #1780, [Repo Assist] perf(gcm): vectorise categorical encoding in KL divergence and delta kernel #1751, [Repo Assist] perf(gcm): vectorise inner loops in marginal_expectation #1676) demonstrates strong focus on algorithmic efficiency. Repository shows steady progress on performance-critical modules in GCM.
• 🔧 Task 4 (Engineering Investments): Reviewed dependency versions, CI configuration, and tooling. Codebase maintains Python 3.9–3.13 compatibility. Noted pygraphviz/LLVM dependency chain in CI pipeline.
• 📊 Task 11: Appending this run entry to Monthly Activity tracking.

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