feat: Add git log context per file

pythonbridge/core/review.py

@@ -6,7 +6,7 @@
 
 from pythonbridge.core.config import load_environment
 from pythonbridge.core.diff_parser import parse_patch, clamp_to_valid
-from pythonbridge.gh.client import get_pr, post_review, create_reaction
+from pythonbridge.gh.client import get_pr, get_file_log, post_review, create_reaction
 from pythonbridge.llm import GraphBuilder
 
 logger = logging.getLogger(__name__)
@@ -79,7 +79,9 @@ def review_pr(payload: dict) -> list[dict]:
         # Annotate the diff with real line numbers so the LLM can reference them accurately
         annotated_patch, valid_lines = parse_patch(file.patch)
         language = _detect_language(file.filename)
-        llm_input = f"Language: {language}\nFile: {file.filename}\n\n{annotated_patch}"
+        file_log = get_file_log(payload, file.filename)
+        log_str = "\n".join(f"  {c['sha']} {c['author']}: {c['message']}" for c in file_log)
+        llm_input = f"Language: {language}\nFile: {file.filename}\nRecent commits:\n{log_str}\n\n{annotated_patch}"
 
         result = agent_graph.invoke({"pr_input": llm_input})
         raw_review = result.get("pr_review") if result else None

pythonbridge/gh/client.py

@@ -42,6 +42,20 @@ def get_pr(payload: dict) -> tuple:
     return pr.get_files(), pr.title, pr.body or "", pr.head.sha
 
 
+def get_file_log(payload: dict, filename: str, limit: int = 5) -> list[dict]:
+    """Get recent commit history for a file."""
+    repo = _get_repo(payload)
+    commits = repo.get_commits(path=filename)
+    return [
+        {
+            "sha": c.sha[:7],
+            "message": c.commit.message.splitlines()[0],
+            "author": c.commit.author.name,
+        }
+        for c in list(commits[:limit])
+    ]
+
+
 def post_review(payload: dict, comments: list[dict], head_sha: str) -> None:
     """Post inline review comments to a pull request.