deterministic test suite

Tests. Reproducibility. Tamper-evidence. Narrative integrity.

These tests prove a single property: integrity over time. Same input → same sealed JSON core → same SHA-256 hash. Any tamper → different hash. This is not “truth”. It is verifiable stability for institutional decision defense.

Mode Deterministic AI None Seal SHA-256 Output Sealed JSON + readable preview + public hash

Hash proves tamper-evidence (integrity), not factual truth. Accountability remains human. This suite runs 100% locally in your browser (no server).

3 stress tests (from simple to crisis)

Audit-ready No AI

Stress 1 — Reproducibility

Board question: “Can you reproduce the same evidence bundle months later?” This test verifies stable rules: same fixture → same sealed core hash.

Signal: reputational exposure, governance pressure, need for reconstructibility at Moment T.

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Expected hash

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Computed hash

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Result

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Stress 2 — Internal Tamper / Sabotage

Internal risk: “One field was changed to ‘make the file look cleaner’.” This test proves the seal breaks on any modification.

Signal: internal manipulation, procedural drift, silent edits under pressure.

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Enable tamper

Change one field (deadline) before hashing. Expected outcome: FAIL (hash mismatch).

Expected hash

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Computed hash

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Result

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Stress 3 — Influence / Narrative Swap

Crisis reality: “The readable story was swapped while the core stayed unchanged.” This test checks that readable preview is bound to the sealed core via a preview hash marker.

Signal: reputational attack, hostile comms, “official narrative” drifting away from sealed facts.

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Swap readable preview

Replace readable preview without updating the core marker. Expected outcome: FAIL (preview mismatch).

Core hash

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Preview hash

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Result

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What auditors verify

Minimal, sufficient, explicit

Determinism

No AI, no randomness, stable rules

Tamper-evidence

SHA-256 seal breaks on any change

Verifiability

Hash can be checked publicly over time

Discipline

Fixtures + expected outputs are versioned

This suite does not claim “truth”. It demonstrates that a bundle is stable and tamper-evident — which is what institutions need when narratives become contested.

Spec · Simulator · Examples