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- Introduce `namespace.Ops` interface to decouple `Manager` from system-level namespace operations, enabling easier unit testing via mocks.
- Add unit tests for `internal/paths` to verify path resolution logic across different environment configurations.
- Implement `EnsureBinary` helper in E2E tests to gracefully skip tests when `WG_WRAP_BIN` is not set, allowing `go test ./...` to pass in non-build environments.
- Apply project-wide formatting and fix linting issues.
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- Remove leftover DEBUG prints from CLI and wireguard internal packages.
- Silence stdout during successful command wrapping to ensure only the wrapped command's output is visible.
- Redirect all warnings and internal errors to stderr.
- Implement a verbose mode via `WG_WRAP_VERBOSE=1` to enable tunnel status messages.
- Update E2E tests to use verbose mode for verification of tunnel lifecycle events.
- Fix errcheck linting issue in wireguard.go and apply go fmt.
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- Replace marker-file pinning with kernel bind-mount anchors for reliable namespace persistence.
- Implement atomic "last-man-out" cleanup sequence using ProfileLock, preventing namespace leaks and race conditions.
- Add comprehensive resilience test suite covering:
- Crash recovery from stale runtime state.
- Host network change stability.
- Configuration hot-swap session persistence.
- Resource exhaustion and high-churn lifecycle stress.
- Align documentation and test expectations with rootless session-based persistence.
- Fix argument integrity and isolation leaks.
- Ensure 100% pass rate for all E2E and integration tests.
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