HELIX SRI → MRI BRIDGE (Public Reference Edition v1.0)

Status: Active | Last verified 2025-10-19 | Schema: helix-ttd-proof-v1

PURPOSE

The SRI → MRI Bridge converts verified Societal Resonance Index (SRI) outputs into a format consumable by Helix’s Metacognitive Resonance Index (MRI) and Quality Score Rubric (QSR) layers.

It ensures that all imported data from the SRI pipeline remains deterministic, verifiable, and traceable to its signed proof capsule.

This bridge formalizes the connection between societal telemetry (SRI) and cognitive system telemetry (MRI), allowing Helix-TTD to correlate collective human signals with internal reasoning metrics.

OVERVIEW

The bridge performs four primary functions:

Verify the authenticity of the latest SRI outputs.

Copy the verified set into a read-only cache (bridge inbox).

Normalize and transform SRI data into MRI-ready schema.

Deliver a deterministic mri_input_sri.csv for ingestion by MRI/QSR pipelines.

Every stage is governed by custody-before-trust enforcement — the bridge never processes unverified data.

SYSTEM STRUCTURE (ABSTRACTED)

Supporting directories:

• {INSTALL_PATH}/sri/out/ → SRI outputs (source)
• {INSTALL_PATH}/ttd/mri/inbox/ → MRI ingest destination

All directories are configurable; no fixed paths or credentials are exposed.

DATA CONTRACTS

Input: SRI Daily Data

Format: sri_daily.csv

Fields:

• date — UTC date (YYYY-MM-DD)
• sri_global — numeric resonance score (0–100)
• top_tags — comma-separated list of dominant event tags

Output: MRI Input (Bridge Product)

Format: mri_input_sri.csv

Fields:

• ts_utc — end-of-day timestamp (YYYY-MM-DDT23:59:59Z)
• sri_global — same as input
• sri_variance_7d — rolling variance of SRI over 7 days
• top_tags — direct transfer from source
• source_sha256 — hash of original proof capsule digest
• source_sig — detached signature (verbatim, base64-armored)
• created_utc — timestamp of bridge execution

This schema ensures direct traceability to the signed source.

SECURITY MODEL

Custody-before-trust is mandatory:

• The bridge must verify the SRI signature before any file copy or transformation.
• Any missing artifact or failed verification aborts the run.
• The signature is verified against a public allowed_signers registry.
• Each successful cycle logs a record of verification, source hash, and timestamp.

Verification Command Example:

Expected: “Good ttd-ledger-root signature”.

PIPELINE SEQUENCE

Verify the latest SRI proof capsule signature.

Copy verified outputs (CSV + proof files) into a timestamped inbox folder.

Compute a deterministic SHA-256 hash of the digest list.

Generate mri_input_sri.csv with provenance metadata.

Deliver file to MRI/QSR inbox for ingestion.

Log full details to the bridge logbook.

Each step is auditable, replayable, and reversible.

BRIDGE TRANSFORMATION LOGIC

The bridge applies only deterministic, human-readable transformations:

• Converts date → end-of-day UTC timestamp.
• Computes a 7-day rolling variance over sri_global.
• Appends source_sha256, source_sig, and creation timestamp.
• Writes plain-text CSV (UTF-8, no BOM).

No AI inference or non-deterministic processing is involved.

GOVERNANCE AND ALIGNMENT

Helix-TTD Pillars Reinforced:

• Trust-by-Design — verification enforced at every step
• Human-First — readable and reproducible outputs
• Verifiable Memory — each row linked to its original proof capsule
• Open Interfaces — uses CSV/JSON; no closed formats
• Responsible Power — never acts without verified provenance
• Reliability over Hype — transparent numeric computation only
• Craft & Care — explicit schemas and manual review pathways

OPERATIONAL CADENCE

The bridge is typically scheduled shortly after each SRI run (e.g., within 1–2 minutes).

It operates independently and idempotently: rerunning with the same source data yields identical outputs.

All executions generate timestamped logs for observability.

EXTENSION POINTS

• Integration with MRI dashboards for trend visualization
• Optional aggregation of SRI + MRI data for correlation analysis
• Future support for Proof-Market peer replication
• Cross-node verification between independent auditors

SECURITY AND PRIVACY NOTES

• Private keys remain under Tier-0 custody and are never published.
• The bridge uses only public verification data (allowed_signers).
• No personal or identifiable data is present in event streams or outputs.
• The entire bridge process is deterministic and auditable.

SUMMARY

The SRI → MRI Bridge forms the verifiable interface between external societal telemetry and Helix’s internal metacognitive systems.

It operationalizes the Helix principle of custody before computation, ensuring that every data point influencing decision logic originates from a signed, transparent, and reproducible source.

This bridge closes the loop between collective human resonance and machine reasoning, reinforcing Helix-TTD’s commitment to accountable, human-first autonomy.