Langflow langflow 1.13.0: our test log

# Install with uv (cold, no cache)
uv venv -q -p 3.13 work/py/langflow && VIRTUAL_ENV=work/py/langflow uv pip install --no-cache -q langflow && du -sm work/py/langflow | cut -f1 && VIRTUAL_ENV=work/py/langflow uv pip list 2>/dev/null | grep -i -E "^(langflow|langflow) "

# Task command (start server, probe API)
work/py/langflow/bin/langflow run --host 127.0.0.1 --port 7861 --backend-only (driven by tasks3/langflow_task.py)

{
 "health": [
  200,
  "{\"status\":\"ok\",\"chat\":\"ok\",\"db\":\"ok\"}"
 ],
 "ready_s": 91.5,
 "version": {
  "version": "1.13.0",
  "main_version": "1.13.0",
  "package": "Langflow"
 },
 "flows": 26,
 "flow_names": [
  "Text Sentiment Analysis",
  "Social Media Agent",
  "Simple Agent",
  "Multi Agent Flow",
  "SEO Keyword Generator",
  "Market Research",
  "Sequential Tasks Agents",
  "Blog Writer"
 ],
 "components_s": 1.39,
 "component_categories": 33,
 "component_count": 416
}

import subprocess, time, json, urllib.request, os, sys, signal
env = dict(os.environ, LANGFLOW_CONFIG_DIR="/workspace/tests2/work/langflow-home", LANGFLOW_DATABASE_URL="sqlite:////workspace/tests2/work/langflow-home/lf.db", LANGFLOW_AUTO_LOGIN="true", DO_NOT_TRACK="true", LANGFLOW_DO_NOT_TRACK="true", LANGFLOW_OPEN_BROWSER="false")
t0 = time.perf_counter()
p = subprocess.Popen(["work/py/langflow/bin/langflow", "run", "--host", "127.0.0.1", "--port", "7861", "--backend-only", "--no-open-browser"], env=env, stdout=open("/workspace/tests2/logs/langflow-server.log", "w"), stderr=subprocess.STDOUT, preexec_fn=os.setsid)
def get(path, hdr=None):
    r = urllib.request.Request("http://127.0.0.1:7861" + path, headers=hdr or {})
    with urllib.request.urlopen(r, timeout=10) as x: return x.status, x.read()
res = {}
ready = None
while time.perf_counter() - t0 < 600:
    if p.poll() is not None: res["died"] = p.returncode; break
    try:
        s, b = get("/health_check"); ready = round(time.perf_counter() - t0, 1); res["health"] = [s, b.decode()[:120]]; break
    except Exception: time.sleep(2)
res["ready_s"] = ready
if ready:
    s, b = get("/api/v1/version"); res["version"] = json.loads(b)
    s, b = get("/api/v1/auto_login"); tok = json.loads(b)["access_token"]
    s, b = get("/api/v1/flows/?get_all=true&header_flows=true", {"Authorization": "Bearer " + tok})
    fl = json.loads(b); res["flows"] = len(fl); res["flow_names"] = [f["name"] for f in fl][:8]
    t = time.perf_counter(); s, b = get("/api/v1/all", {"Authorization": "Bearer " + tok}); res["components_s"] = round(time.perf_counter() - t, 2)
    try:
        d = json.loads(b); res["component_categories"] = len(d); res["component_count"] = sum(len(v) for v in d.values())
    except Exception as e: res["components_err"] = str(e)[:100]
os.killpg(os.getpgid(p.pid), signal.SIGTERM)
print("RESULT_JSON " + json.dumps(res))

uv venv -p 3.13 .venv && VIRTUAL_ENV=.venv uv pip install langflow
LANGFLOW_AUTO_LOGIN=true .venv/bin/langflow run --backend-only --port 7861
curl http://127.0.0.1:7861/health_check