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e8034e2f6a
When two gateway messages arrived concurrently, _set_session_env wrote HERMES_SESSION_PLATFORM/CHAT_ID/CHAT_NAME/THREAD_ID into the process-global os.environ. Because asyncio tasks share the same process, Message B would overwrite Message A's values mid-flight, causing background-task notifications and tool calls to route to the wrong thread/chat. Replace os.environ with Python's contextvars.ContextVar. Each asyncio task (and any run_in_executor thread it spawns) gets its own copy, so concurrent messages never interfere. Changes: - New gateway/session_context.py with ContextVar definitions, set/clear/get helpers, and os.environ fallback for CLI/cron/test backward compatibility - gateway/run.py: _set_session_env returns reset tokens, _clear_session_env accepts them for proper cleanup in finally blocks - All tool consumers updated: cronjob_tools, send_message_tool, skills_tool, terminal_tool (both notify_on_complete AND check_interval blocks), tts_tool, agent/skill_utils, agent/prompt_builder - Tests updated for new contextvar-based API Fixes #7358 Co-authored-by: teknium1 <127238744+teknium1@users.noreply.github.com>