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f8738d1e3e
Phase 2 Task P2-3 (Category H): the client now owns its AppConfig for its lifetime via self._app_config, instead of routing through the process-global AppConfig.current() / AppConfig.init() path. Constructor resolution priority: 1. Explicit config= parameter (new; enables multi-client isolation) 2. Explicit config_path= parameter (reads file directly, no process-global write) 3. AppConfig.current() (legacy fallback; removed in P2-10) All 7 method-level AppConfig.current() reads are replaced with self._app_config. _reload_config() no longer mutates the process-global — only the client's own config is rebuilt, so concurrent clients' configs remain isolated. New test: test_client_multi_isolation.py pins the key invariant — two clients with different configs coexist without contention. Before this refactor the second client's init() would clobber the first. Test updates: ~8 test_client.py sites that formerly relied on patch.object(AppConfig, "current", ...) now set client._app_config directly to the mock. test_custom_config_path no longer asserts AppConfig.init() was called because the client no longer touches it. All 141 test_client.py + 46 test_client_e2e.py/multi_isolation tests pass.