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cleveragents-core/CONTRIBUTORS.md
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fix(git_tools): eliminate TOCTOU race in _get_base_env() with double-checked locking
Add module-level _BASE_ENV_LOCK: threading.Lock and replace the bare
if _BASE_ENV is None assignment with double-checked locking. The outer
check keeps the warm-cache path lock-free; the inner check inside
with _BASE_ENV_LOCK prevents duplicate initialisation when two threads
race on the very first call.

Add three BDD scenarios in features/git_tools.feature (step definitions
in features/steps/git_tools_thread_safety_steps.py) verifying caching
identity, content correctness, and thread safety under 20 concurrent
threads using threading.Barrier.

Update CHANGELOG.md and CONTRIBUTORS.md per contribution guidelines.

ISSUES CLOSED: #7619
2026-05-05 05:25:28 +00:00

3.8 KiB

Contributors

Details

Below are some of the specific details of various contributions.

  • Jeffrey Phillips Freeman has acted as Lead Developer, daily contributor, and Project Owner.
  • Brent E. Edwards has contributed quality assurance, test coverage, and CI pipeline improvements.
  • HAL 9000 has contributed automated implementation, bug fixes, and feature development as part of the CleverAgents automation pool.
  • HAL 9000 has contributed concurrency safety improvements, including thread-safe context tier management (issue #7547) for parallel plan execution.
  • HAL 9000 has contributed the plan concurrency race-condition fix (#7989): wired LockService into the plan lifecycle, guarding execute_plan() and apply_plan() with plan-level advisory locks and unique per-invocation owner identities to prevent silent concurrent state corruption.
  • HAL 9000 has contributed the bug-hunt-pool-supervisor non-blocking tracking fix: updated step 5 to be best-effort and added rule 9 to prevent the automation-tracking-manager call from blocking the main supervisor loop.
  • HAL 9000 has contributed the plugin entry point security hardening fix (#7476): enforced entry point allowlist validation before importing plugin modules to prevent malicious plugin loading.
  • HAL 9000 has contributed the benchmark workflow separation (#9040): moved the benchmark-regression job out of the default PR workflow into a dedicated scheduled workflow, reducing median PR CI turnaround time from 99-132 minutes to under 30 minutes.
  • HAL 9000 has contributed the agent-evolution-pool-supervisor PR metadata assignment (#7888): the supervisor now automatically looks up the Type/Automation label and earliest open milestone before dispatching improvement PR creation workers, ensuring all generated improvement PRs have correct Type labels and milestone assignments.
  • This project was made possible thanks to considerable donation of time, money, and resources by CleverThis, Inc.
  • HAL 9000 has contributed automated bug fixes, CLI output formatting improvements, and ongoing maintenance as part of the CleverAgents automation system.
  • HAL 9000 has contributed the file edit encoding parameter fix (PR #8258 / issue #7559).
  • HAL 9000 has contributed the architecture-pool-supervisor milestone assignment feature (PR #8188 / issue #7521): added forgejo_update_pull_request permission and documented the PR workflow for major spec changes, enabling automatic milestone assignment for specification PRs.
  • HAL 9000 has contributed the git worktree TOCTOU race condition fix (PR #8178 / issue #7507): replaced the unsafe mkdtemp() + rmdir() pattern with a parent-directory approach to eliminate the race window in concurrent git worktree operations.
  • HAL 9000 has contributed the git_tools TOCTOU race condition fix (PR #8255 / issue #7619): eliminated the Time-Of-Check-To-Time-Of-Use race in _get_base_env() by adding double-checked locking with a module-level threading.Lock, preventing concurrent threads from writing conflicting environment snapshots.
  • HAL 9000 has contributed comprehensive milestone documentation for v3.6.0 (Advanced Concepts & Deferred Features) and v3.7.0 (TUI Implementation) (PR #9903): split into sub-documents covering context strategies, LLM backends, resource types, A2A rename, container tool execution, scope chain resolution, cost/safety budgets, E2E workflow tests, code review examples, plugin architecture, TUI layout, persona system, reference/command input, session management, configuration, and TuiMaterializer integration.