examples/pcr: add executable showboat demo#35
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DEMO.md is a verifiable walkthrough — `showboat verify examples/pcr/DEMO.md` re-runs every block from the repo root and diffs the output. Covers the money shot (one proof term's fate as its fact is revoked and restored, surgically), the engine-parity check (native vs CPS byte-identical), the full selftest battery of behavior/defense categories, and a live hostile-input pass (spoofed proof, uppercase type-variable injection, unknown principal, and a grant refused over a corrupt blob). Every block is filtered to deterministic output (no timing/heap/boot-banner noise) so verify is stable. README links it. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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examples/pcr/DEMO.md— an executable showboat walkthrough that both documents and proves the proof-carrying-requests example.showboat verify examples/pcr/DEMO.md(from the repo root) re-runs every code block and diffs the output; it passes deterministically (verified twice).Sections:
ALLOW → DENY (identical bytes) → alice's own proof still ALLOW (surgical) → re-grant → ALLOW.Every block filters out non-deterministic noise (timing, heap deltas, the kernel load banner) so
verifyis stable across runs and machines. README links the demo.Doc-only; no code changes.
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