* fix: filesystem provider import machinery
- Temporary sys.path entries (both package and non-package mode) now removed
immediately after exec_module via try/finally, eliminating permanent process-wide pollution
- Non-package files use bare stem as sys.modules key only if unclaimed; falls back
to private hash-based key to prevent stdlib shadowing (e.g. json.py clobbering json)
- Reload of private-key modules uses spec.loader.exec_module directly instead of
importlib.reload, which cannot find files by their private synthetic name
- _find_package_root gains stop_at parameter; discover_and_import passes provider_root
to prevent package root discovery from escaping above the provider boundary
Closes#3625 (issues 2, 3, 6)
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* fix: use contextlib.suppress for SIM105 linting
🤖 Generated with Claude Code
* test: add import machinery regression tests
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* fix: resolve provider_root before path comparison; improve tests
- Resolve provider_root in import_module_from_file so the stop_at boundary
in _find_package_root works correctly when provider_root is a relative path
(e.g. FileSystemProvider(Path("./mcp"))) — previously the resolved file_path
and unresolved stop_at.parent would never compare equal
- Fix test_stdlib_not_shadowed: use unconditional finally to restore sys.modules["json"]
- Strengthen test_same_stem_files: assert mod_a is not mod_b and that sys.modules["helpers"]
was not clobbered by the second import
- Replace direct _find_package_root unit test with an integration test through
import_module_from_file(provider_root=...) that also verifies the module name
and that tmp_path is not added to sys.path
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* pin pydantic-monty to 0.0.8
* rename tool/prompt/resource base modules to avoid decorator name shadow
* add sys.modules shims for old submodule import paths
* preserve original module paths in deprecation warnings
* clarify when sys.modules shims can be removed
