Synthetic sample

Helix evidence bundle sample

Inspect a small, synthetic in silico evidence bundle with a manifest, provenance receipt, machine-readable evidence, replay report, checksum index, and local verifier.

This sample proves a narrow software property: local hash validation and required-key checks. It does not assert real-world outcomes.

Bundle contract

Bundle statusVerified
BoundarySynthetic
Replay stateReplayable
ProvenanceReplayable

Manifest, provenance, evidence, replay report, and checksum index stay together.

Local verification

Verify the bundle offline.

Command

node verify.mjs

Run this command from the unzipped sample bundle directory. The verifier checks SHA-256 hashes and required JSON keys.

Expected output

Helix sample evidence bundle verification passed.
Verified 5 checksums.
Verified required keys for 4 JSON artifacts.

Trust surface

What the sample proves.

Verified

helix.evidence_bundle_manifest.v1

Synthetic

In silico only

Replayable

Offline verification

Replayable

synthetic-decision-workflow-alpha

Artifact anatomy

Files in the bundle.

provenance_receipt.json

provenance

Indexed by manifest.json

evidence.json

machine readable evidence

Indexed by manifest.json

replay_report.json

verification report

Indexed by manifest.json

checksums.sha256

integrity index

Indexed by manifest.json

Policy results

Machine-readable review state.

Verified

Recorded in evidence.json

Verified

Recorded in evidence.json

Replayable

Recorded in evidence.json

Checksums

Digest index.

bb0ad4b5c06c32030ce71cc857b000f5a835ac828930e7b90aae487633c1b6af  manifest.json
13afc264ec4c391fc765de26ea78e0f9ad200dfc500fce19dda1b23f791fe244  provenance_receipt.json
e124c28ffdb251fda0ec90bf99b4d55c01fb0014cdaf28fa137425f75ddee028  evidence.json
b492028e81fafc9c0aff400a7b86aea4171f1150f986f1a73704062a816499b8  replay_report.json
f3d8455b41d55ecb1130dfa6523d8e82de0e55098d098cb519acafe2845b0f1b  README.md

Inspectable artifacts

Canonical JSON surfaces.

Raw artifact

manifest.json

{
  "schema": {
    "kind": "helix.evidence_bundle_manifest",
    "version": 1
  },
  "bundle_id": "helix-synthetic-evidence-bundle-v1",
  "bundle_type": "synthetic_in_silico_sample",
  "created_at_utc": "2026-05-06T00:00:00Z",
  "synthetic": true,
  "in_silico_only": true,
  "purpose": "Demonstrate the structure and local verification behavior of a Helix evidence bundle.",
  "status": "Verified",
  "policy_profile": "public-sample-policy-v1",
  "required_files": [
    "manifest.json",
    "provenance_receipt.json",
    "evidence.json",
    "replay_report.json",
    "README.md"
  ],
  "artifact_index": [
    {
      "path": "provenance_receipt.json",
      "role": "provenance"
    },
    {
      "path": "evidence.json",
      "role": "machine_readable_evidence"
    },
    {
      "path": "replay_report.json",
      "role": "verification_report"
    },
    {
      "path": "checksums.sha256",
      "role": "integrity_index"
    }
  ],
  "claims_boundary": {
    "uses_synthetic_data": true,
    "models_software_artifacts_only": true,
    "real_world_outcome_claim": false,
    "medical_use_claim": false
  }
}

Raw artifact

provenance_receipt.json

{
  "schema": {
    "kind": "helix.provenance_receipt",
    "version": 1
  },
  "receipt_id": "prov-synthetic-sample-0001",
  "bundle_id": "helix-synthetic-evidence-bundle-v1",
  "run_id": "run-synthetic-model-0001",
  "generated_at_utc": "2026-05-06T00:00:00Z",
  "source": {
    "system": "Omnis Helix",
    "mode": "synthetic in silico sample",
    "workspace_id": "workspace-public-sample"
  },
  "environment": {
    "runtime": "node",
    "verifier": "verify.mjs",
    "determinism_class": "Replayable"
  },
  "inputs": {
    "dataset_id": "synthetic-decision-workflow-alpha",
    "input_hash_policy": "sha256",
    "contains_real_world_samples": false
  },
  "artifacts": [
    "manifest.json",
    "evidence.json",
    "replay_report.json",
    "checksums.sha256"
  ]
}

Raw artifact

evidence.json

{
  "schema": {
    "kind": "helix.machine_readable_evidence",
    "version": 1
  },
  "evidence_id": "evidence-synthetic-sample-0001",
  "bundle_id": "helix-synthetic-evidence-bundle-v1",
  "run_id": "run-synthetic-model-0001",
  "synthetic": true,
  "in_silico_only": true,
  "decision_workflow": {
    "intent_id": "intent-synthetic-alpha",
    "constraint_set_id": "constraints-public-sample-v1",
    "model_contract": "helix.public_sample_contract.v1"
  },
  "assumptions": [
    "Synthetic identifiers are used for demonstration.",
    "Scores are fixture values for verifier and bundle-shape inspection.",
    "No real-world outcome is asserted."
  ],
  "scores": [
    {
      "name": "integrity_completeness",
      "value": 1,
      "scale": "0_to_1"
    },
    {
      "name": "replay_metadata_present",
      "value": 1,
      "scale": "0_to_1"
    }
  ],
  "policy_results": [
    {
      "policy": "required_manifest_fields",
      "status": "Verified"
    },
    {
      "policy": "synthetic_data_boundary",
      "status": "Verified"
    },
    {
      "policy": "offline_hash_verification",
      "status": "Replayable"
    }
  ]
}

Raw artifact

replay_report.json

{
  "schema": {
    "kind": "helix.replay_report",
    "version": 1
  },
  "report_id": "replay-synthetic-sample-0001",
  "bundle_id": "helix-synthetic-evidence-bundle-v1",
  "run_id": "run-synthetic-model-0001",
  "generated_at_utc": "2026-05-06T00:00:00Z",
  "status": "Replayable",
  "verifier": {
    "command": "node verify.mjs",
    "checks": [
      "sha256 hashes match checksums.sha256",
      "manifest required keys are present",
      "provenance receipt required keys are present",
      "evidence required keys are present",
      "replay report required keys are present"
    ]
  },
  "replay": {
    "input_mode": "synthetic fixture",
    "network_required": false,
    "external_service_required": false
  }
}