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SynthLedger

Evidence layer

An audit trail layer that records AI decisions and human approvals — basis, approver, and stop conditions — and detects partial tampering via a hash chain. It answers “can we really let AI handle this?” with a record.

SynthLedger (formerly AgentLedger) — Audit Trailhash chain (partial tamper detection)
08:32:11 · journal entry created
action=create_deal amount=— status=approval_required
08:33:04 · CEO approval
approved_by=CEO gate=CEO status=approved
08:33:05 · execute + signed log
prev_hash=… sha256=… recorded

Illustrative example. No action is executed before approval.

WHAT IT RECORDS

Who, what, when, and on what basis.

Who

The approver and the acting principal are recorded, keeping human and AI decisions separate.

What

Each action — created, approved, executed — is recorded with its target and result.

When

A timestamp is kept for every action, so you can trace the sequence afterward.

Tamper-evident (hash chain)

Records are chained with prev_hash and sha256, so later rewrites can be detected.

Built into SynthAgent / standalone offering decided after the promotion gate

SynthLedger is the audit trail layer bundled with SynthAgent. It keeps evidence in a form you can use as a draft for external audit reports; full re-link resistance assumes an external anchor. A standalone offering is decided after the promotion gate. Planned for launch on AWS Marketplace in September 2026.

Answer with a record. Start with 30 minutes.

We will help design which evidence to keep for which operations, including the approval and logging design. Inquiries in English are welcome.