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Isolate the macOS documentation helper cache per process - #41
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Thank-you for finding this jdotc1 (and agent)
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Allocate the compiled helper in a retained TemporaryDirectory, avoiding reuse of a fixed-name executable while preserving reuse within a process.
Validation: Reused package/baseline-receipt.json and package/patched-receipt.json. Baseline source-excerpt regression failed and the same minimal edit passed: Private 0700 staging; fixed-name sentinel not reused; one mocked compile for two helper requests. Full source context and committed diff reviewed. No unchanged tests rerun.
Limitations: Documentation helper only. Each process compiles once; abrupt termination may leave temporary files. No Swift modification, native build, signing or macOS runtime check. SECURITY.md discourages public reports of unfixed vulnerabilities; no exploit demonstrated.