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WORM ledger substrate: four-layer architecture and two boot envelopes

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@@ -9,20 +9,24 @@ bcsc_class: current-fact
language: en
paired_with: worm-ledger-architecture.es.md
category: infrastructure
status: active
quality: complete
last_edited: 2026-05-25
editor: pointsav-engineering
---



`service-fs` provides the per-tenant Write-Once-Read-Many (WORM) immutable ledger that serves as the durable backbone for all Ring 1 boundary-ingest services. By enforcing a strict append-only invariant through cryptographic hash-chaining and structural isolation, the platform ensures that identity, communications, and document records remain tamper-evident and permanently accessible.

## Architectural Integration
## Architectural integration

The WORM ledger sits at the critical boundary between the per-tenant data plane and the multi-tenant knowledge plane. Every ingest service—including `service-people` and `service-email`—writes through this substrate, while Ring 2 services access data via cursor-paged MCP queries.

* **Current Posture:** Isolation is achieved through separate daemon processes per tenant `moduleId` and rigorous filesystem permissioning.
* **Intended Trajectory:** Migration to seL4 microkernel-level capability enforcement is planned to provide formally verified tenant isolation.

## Multi-Tier Protocol Stack
## Multi-tier protocol stack

The architecture uses a layered design to ensure that individual components remain swappable without disrupting the core durability contract.

@@ -40,11 +44,11 @@ The stable core contract defining methods for `append`, `read_since`, and `check
* **seL4 (Intended):** Capability-addressed objects mediated by `moonshot-database`.
* **Format:** Standardized **C2SP tlog-tiles** (matching RFC 9162 v2 / Rekor v2) ensure 100-year readability.

## Regulatory Compliance and Durability
## Regulatory compliance and durability

The design is engineered to align with SEC Rule 17a-4(f) WORM requirements and EU eIDAS qualified preservation standards. By adopting the plain-text C2SP tile format, the platform guarantees that a forensic analyst in the year 2126 could decode the storage using only basic Unix utilities and a SHA-256 implementation.

## Cross-Target Synthesis
## Cross-target synthesis

The platform’s implementation is unique in its dual-target Rust strategy, allowing the same binary to serve as a Linux daemon today and an seL4 unikernel tomorrow. This ensures that the storage substrate is portable from a virtual machine to a future ToteboxOS hardware appliance without a core rewrite.
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