From 50a2a91cfcf94fbc03fbb351284ed84ec49d853d Mon Sep 17 00:00:00 2001
From: Hamid Arian <harian@yorku.ca>
Date: Fri, 19 Jun 2026 00:42:42 -0400
Subject: [PATCH] ci: pin black and ruff to exact versions; format for black
 26.x

---
 .github/workflows/ci.yml                          | 4 ++--
 RiskLabAI/ensemble/bagging_classifier_accuracy.py | 1 +
 pyproject.toml                                    | 3 +++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7c2e983..c5baf55 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,7 +60,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - run: pip install black
+      - run: pip install "black==26.5.1"
       - run: black --check RiskLabAI test
 
   lint:
@@ -71,5 +71,5 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - run: pip install ruff
+      - run: pip install "ruff==0.15.17"
       - run: ruff check RiskLabAI test
diff --git a/RiskLabAI/ensemble/bagging_classifier_accuracy.py b/RiskLabAI/ensemble/bagging_classifier_accuracy.py
index 82f60a5..7e521d6 100644
--- a/RiskLabAI/ensemble/bagging_classifier_accuracy.py
+++ b/RiskLabAI/ensemble/bagging_classifier_accuracy.py
@@ -4,6 +4,7 @@
 as described in "Advances in Financial Machine Learning" by de Prado (2018),
 Chapter 6, Section 6.2, p. 86.
 """
+
 # import numpy as np  <-- Removed unused import
 from scipy.stats import binom
 
diff --git a/pyproject.toml b/pyproject.toml
index 28e80e2..fe91058 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,6 +61,9 @@ dev = [
     "torchvision", # Often needed with torch
     "torchaudio",  # Often needed with torch
     "pytest",
+    # Linters pinned to match CI exactly (.github/workflows/ci.yml).
+    "black==26.5.1",
+    "ruff==0.15.17",
 ]
 all = [
     "RiskLabAI[pde]",