From 492f5cf1e4c28d723480d70edd7e637633c0a42c Mon Sep 17 00:00:00 2001
From: Yiorgis Gozadinos <ggozadinos@gmail.com>
Date: Fri, 20 Feb 2026 17:59:35 +0200
Subject: [PATCH] Avoid mutable defaults

---
 haiku_rag_slim/haiku/rag/skills/rag.py | 12 ++++++------
 haiku_rag_slim/haiku/rag/tools/qa.py   |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/haiku_rag_slim/haiku/rag/skills/rag.py b/haiku_rag_slim/haiku/rag/skills/rag.py
index 04d835db..776db28a 100644
--- a/haiku_rag_slim/haiku/rag/skills/rag.py
+++ b/haiku_rag_slim/haiku/rag/skills/rag.py
@@ -2,7 +2,7 @@ import os
 from pathlib import Path
 from typing import Any
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from pydantic_ai import RunContext
 
 from haiku.rag.agents.research.models import Citation
@@ -31,12 +31,12 @@ class ResearchEntry(BaseModel):
 
 
 class RAGState(BaseModel):
-    citations: list[Citation] = []
-    qa_history: list[QAHistoryEntry] = []
+    citations: list[Citation] = Field(default_factory=list)
+    qa_history: list[QAHistoryEntry] = Field(default_factory=list)
     document_filter: str | None = None
-    searches: dict[str, list[SearchResult]] = {}
-    documents: list[DocumentInfo] = []
-    reports: list[ResearchEntry] = []
+    searches: dict[str, list[SearchResult]] = Field(default_factory=dict)
+    documents: list[DocumentInfo] = Field(default_factory=list)
+    reports: list[ResearchEntry] = Field(default_factory=list)
 
 
 def create_skill(
diff --git a/haiku_rag_slim/haiku/rag/tools/qa.py b/haiku_rag_slim/haiku/rag/tools/qa.py
index 0c32da7f..116377ea 100644
--- a/haiku_rag_slim/haiku/rag/tools/qa.py
+++ b/haiku_rag_slim/haiku/rag/tools/qa.py
@@ -11,7 +11,7 @@ class QAHistoryEntry(BaseModel):
     question: str
     answer: str
     confidence: float = 0.9
-    citations: list[Citation] = []
+    citations: list[Citation] = Field(default_factory=list)
     question_embedding: list[float] | None = Field(default=None, exclude=True)
 
     @property