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Basics 0.4.11 — gate preattached BPF diagnostics

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@victorstewart victorstewart released this 25 Sep 03:30
Immutable release. Only release title and notes can be modified.

Compile successful preattached BPF trace formatting and file I/O only when BASICS_DEBUG is enabled. Preserve map resolution and existing failure/verifier logging.

Validated actual XDP preattached map reopen, map identity and seeded readback in an isolated network namespace with Clang 22 / C++26. Identical release fixture fails before the change and passes after it with zero trace I/O; debug diagnostics remain enabled. Thirty samples of 128 map resolutions include wall and thread CPU measurements.