geoffreywoo · February 10, 2026 02:48
diff --git a/README.md b/README.md
diff --git a/browser_mutex.py b/browser_mutex.py
 #!/usr/bin/env python3
 """OpenClaw browser mutex helper.

 Purpose
 - Enforce *single* mutex for ALL browser automation (cron + ad-hoc).
 - Avoid cron/manual collisions.

 Lock file (canonical):
  $WORKSPACE/memory/cron_browser_mutex.json

 Usage
  Acquire (fail if held and not stale):
    python3 scripts/browser_mutex.py acquire --label manual_reply --stale-ms 300000

  Acquire with backoff (cron-style):
    python3 scripts/browser_mutex.py acquire --label x_mentions --backoff 60,120,240 --stale-ms 300000

  Release:
    python3 scripts/browser_mutex.py release
 """

 from __future__ import annotations

 import argparse
 import json
 import os
 import time
 from typing import Optional

 LOCK = "$WORKSPACE/memory/cron_browser_mutex.json"


 def _now_ms() -> int:
    return int(time.time() * 1000)


 def _read_lock() -> Optional[dict]:
    try:
        with open(LOCK, "r") as f:
            return json.load(f)
    except FileNotFoundError:
        return None
    except Exception:
        # Corrupt lock file -> treat as stale.
        return {"label": "<corrupt>", "startedAtMs": 0}


 def _write_lock(label: str) -> None:
    os.makedirs(os.path.dirname(LOCK), exist_ok=True)
    with open(LOCK, "w") as f:
        json.dump({"label": label, "startedAtMs": _now_ms()}, f)


 def acquire(label: str, stale_ms: int, backoff: Optional[list[int]]) -> None:
    waits = backoff or []
    attempts = max(1, len(waits) + 1)

    for i in range(attempts):
        st = _read_lock()
        if not st:
            _write_lock(label)
            print("LOCK_OK")
            return

        age = _now_ms() - int(st.get("startedAtMs", 0) or 0)
        if age >= stale_ms:
            # Take over stale lock.
            _write_lock(label)
            print("LOCK_OK_STALE_TAKEOVER", json.dumps(st), "age_ms", age)
            return

        if i < len(waits):
            wait_s = waits[i]
            print("LOCKED_BY", json.dumps(st), "age_ms", age, "waiting_s", wait_s)
            time.sleep(wait_s)
            continue

        print("LOCKED_BY", json.dumps(st), "age_ms", age)
        raise SystemExit(3)


 def release() -> None:
    try:
        os.remove(LOCK)
        print("LOCK_RELEASED")
    except FileNotFoundError:
        print("LOCK_NOT_HELD")


 def main() -> None:
    ap = argparse.ArgumentParser()
    sub = ap.add_subparsers(dest="cmd", required=True)

    ap_a = sub.add_parser("acquire")
    ap_a.add_argument("--label", required=True)
    ap_a.add_argument("--stale-ms", type=int, default=300000)
    ap_a.add_argument(
        "--backoff",
        help="Comma-separated seconds list, e.g. 60,120,240 (cron-style).",
        default=None,
    )

    sub.add_parser("release")

    args = ap.parse_args()

    if args.cmd == "acquire":
        backoff = None
        if args.backoff:
            backoff = [int(x.strip()) for x in args.backoff.split(",") if x.strip()]
        acquire(args.label, args.stale_ms, backoff)
    elif args.cmd == "release":
        release()


 if __name__ == "__main__":
    main()
diff --git a/browser_mutex_single_tab.md b/browser_mutex_single_tab.md
diff --git a/LICENSE b/LICENSE
 MIT License

 Copyright (c) 2026 Geoffrey Woo

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
diff --git a/stall_runbook.md b/stall_runbook.md
	#!/usr/bin/env python3
	"""OpenClaw browser mutex helper.

	Purpose
	- Enforce single mutex for ALL browser automation (cron + ad-hoc).
	- Avoid cron/manual collisions.

	Lock file (canonical):
	$WORKSPACE/memory/cron_browser_mutex.json

	Usage
	Acquire (fail if held and not stale):
	python3 scripts/browser_mutex.py acquire --label manual_reply --stale-ms 300000

	Acquire with backoff (cron-style):
	python3 scripts/browser_mutex.py acquire --label x_mentions --backoff 60,120,240 --stale-ms 300000

	Release:
	python3 scripts/browser_mutex.py release
	"""

	from __future__ import annotations

	import argparse
	import json
	import os
	import time
	from typing import Optional

	LOCK = "$WORKSPACE/memory/cron_browser_mutex.json"


	def _now_ms() -> int:
	return int(time.time() * 1000)


	def _read_lock() -> Optional[dict]:
	try:
	with open(LOCK, "r") as f:
	return json.load(f)
	except FileNotFoundError:
	return None
	except Exception:
	# Corrupt lock file -> treat as stale.
	return {"label": "<corrupt>", "startedAtMs": 0}


	def _write_lock(label: str) -> None:
	os.makedirs(os.path.dirname(LOCK), exist_ok=True)
	with open(LOCK, "w") as f:
	json.dump({"label": label, "startedAtMs": _now_ms()}, f)


	def acquire(label: str, stale_ms: int, backoff: Optional[list[int]]) -> None:
	waits = backoff or []
	attempts = max(1, len(waits) + 1)

	for i in range(attempts):
	st = _read_lock()
	if not st:
	_write_lock(label)
	print("LOCK_OK")
	return

	age = _now_ms() - int(st.get("startedAtMs", 0) or 0)
	if age >= stale_ms:
	# Take over stale lock.
	_write_lock(label)
	print("LOCK_OK_STALE_TAKEOVER", json.dumps(st), "age_ms", age)
	return

	if i < len(waits):
	wait_s = waits[i]
	print("LOCKED_BY", json.dumps(st), "age_ms", age, "waiting_s", wait_s)
	time.sleep(wait_s)
	continue

	print("LOCKED_BY", json.dumps(st), "age_ms", age)
	raise SystemExit(3)


	def release() -> None:
	try:
	os.remove(LOCK)
	print("LOCK_RELEASED")
	except FileNotFoundError:
	print("LOCK_NOT_HELD")


	def main() -> None:
	ap = argparse.ArgumentParser()
	sub = ap.add_subparsers(dest="cmd", required=True)

	ap_a = sub.add_parser("acquire")
	ap_a.add_argument("--label", required=True)
	ap_a.add_argument("--stale-ms", type=int, default=300000)
	ap_a.add_argument(
	"--backoff",
	help="Comma-separated seconds list, e.g. 60,120,240 (cron-style).",
	default=None,
	)

	sub.add_parser("release")

	args = ap.parse_args()

	if args.cmd == "acquire":
	backoff = None
	if args.backoff:
	backoff = [int(x.strip()) for x in args.backoff.split(",") if x.strip()]
	acquire(args.label, args.stale_ms, backoff)
	elif args.cmd == "release":
	release()


	if __name__ == "__main__":
	main()
	MIT License

	Copyright (c) 2026 Geoffrey Woo

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.