Don't ask people to set the env var for everyday test runs; scripts/test and CI carry it

Author: maxisbey

AGENTS.md

@@ -96,7 +96,7 @@ CI requires 100% (`fail_under = 100`, `branch = true`).
 
   ```bash
   uv run --frozen coverage erase
-  PYTHONWARNDEFAULTENCODING=1 uv run --frozen coverage run -m pytest tests/path/test_foo.py
+  uv run --frozen coverage run -m pytest tests/path/test_foo.py
   uv run --frozen coverage combine
   uv run --frozen coverage report --include='src/mcp/path/foo.py' --fail-under=0
   # UV_FROZEN=1 propagates --frozen to the uv subprocess strict-no-cover spawns

CONTRIBUTING.md

@@ -86,10 +86,10 @@ uv tool install pre-commit --with pre-commit-uv --force-reinstall
 
 3. Make your changes
 
-4. Ensure tests pass (`scripts/test` runs them the way CI does, with coverage):
+4. Ensure tests pass:
 
 ```bash
-./scripts/test
+uv run pytest
 ```
 
 5. Run type checking: