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Merge pull request #89 from mmereu/master

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fix: prevent agent subprocess blocking on Windows
This commit is contained in:
Leon van Zyl
2026-01-29 10:54:12 +02:00
committed by GitHub
parent cf62885e83 795bd5f92a
commit a4a33e612e
3 changed files with 34 additions and 18 deletions
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22
server/services/process_manager.py
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@@ -349,14 +349,20 @@ class AgentProcessManager:
try:
# Start subprocess with piped stdout/stderr
# Use project_dir as cwd so Claude SDK sandbox allows access to project files
# IMPORTANT: Set PYTHONUNBUFFERED to ensure output isn't delayed
self.process = subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
cwd=str(self.project_dir),
env={**os.environ, "PYTHONUNBUFFERED": "1"},
)
# stdin=DEVNULL prevents blocking if Claude CLI or child process tries to read stdin
# CREATE_NO_WINDOW on Windows prevents console window pop-ups
# PYTHONUNBUFFERED ensures output isn't delayed
popen_kwargs = {
"stdin": subprocess.DEVNULL,
"stdout": subprocess.PIPE,
"stderr": subprocess.STDOUT,
"cwd": str(self.project_dir),
"env": {**os.environ, "PYTHONUNBUFFERED": "1"},
}
if sys.platform == "win32":
popen_kwargs["creationflags"] = subprocess.CREATE_NO_WINDOW
self.process = subprocess.Popen(cmd, **popen_kwargs)
# Atomic lock creation - if it fails, another process beat us
if not self._create_lock():