browser-use/bubus

This system is a Python-based event bus library named 'bubus', designed to manage asynchronous event processing for a browser-use agent. It provides core capabilities for event enqueueing, handler registration, and parent-child event tracking, with built-in support for concurrency control via semaphores and graceful shutdown mechanisms. The implementation relies on Pydantic for data validation and includes comprehensive testing to ensure reliability in handling nested event hierarchies and system overload scenarios.

Added initial configuration files for the Cursor IDE to streamline Python development. The setup includes launch configurations for debugging the current file and running pytest with verbose output, along with settings that enforce strict type checking, enable automatic formatting and import organization on save using Ruff, and disable variable type inlay hints.

.cursor · high confidence

Adds the bubus package, an event bus implementation for the browser-use agent. This includes the core EventBus service with a custom CleanShutdownQueue to prevent asyncio warnings during shutdown, BaseEvent and EventResult models with support for child event tracking and generic type hints, and helper utilities for logging event trees and managing system overload via semaphores. The library also introduces a retry decorator with multiprocess semaphore support and configurable logging levels.

bubus · high confidence

Added a new test suite covering EventBus initialization, event enqueueing, handler registration, and execution order. Tests verify parent-child event tracking, timeout enforcement with nested event hierarchies, and the event\_bus property access within handlers. The suite also includes tests for automatic event\_result\_type extraction from generic parameters, name conflict resolution with garbage collection, and logging history tree output.

tests · high confidence

This change introduces the bubus project, an advanced Pydantic-powered event bus with async support, establishing the initial package structure and dependencies. The Python package (pyproject.toml) defines a minimum Python version of 3.11 and includes runtime dependencies such as aiofiles, anyio, portalocker, pydantic, typing-extensions, and uuid7. It also sets up a development environment with tools like ruff, pyright, pytest, and pre-commit. Additionally, a Node.js lock file (package-lock.json) is added, specifying TypeScript 5.8.3 and the uuidv7 library.

(dependencies) · high confidence

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

• CAI 57 → 62 (+5.5)
• Rubric changed (rubric-2026.08.19 → rubric-2026.09.15) — scores are not directly comparable.

• Code Health 82 → 87 (+4.8)
• Architecture 100 → 100 (+0.0)
• Maturity 49 → 54 (+4.9)
• Readiness 50 → 55 (+5.2)
• Security 66 → 76 (+10.1)

• Coverage not included — suite not readable by the collector
• Dependency hygiene not measured — dependency manifest found but not parsed for hygiene
• High: security finding (details withheld)
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• No exposed public API
• Off-boarding risk: anonymized user #1
• Test reliability not included
• test_stress_20k_events.test_20k_events_with_memory_control (cognitive 21) (tests/test_stress_20k_events.py)

• Dependency hygiene PARTLY measured — Python dependencies read, no exact pin to grade for currency
• Documentation: no installation or build instructions (README.md)
• Documentation: no usage examples (README.md)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
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• High: security finding (details withheld)
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• High: security finding (details withheld)
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• …and 5 more

• 1 commits — 1 feature/other, 0 fixes

• .github/workflows — 1 commit

• change: Pin automated review to an available Sonnet model (#37)

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

browser-use/bubus was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point a surveyor at a repository you know and see whether you agree with it.