Architecture, pipeline design, interceptor specification, and compliance validation across eight engines for regulatory framework management, electronic signatures, immutable audit trails, design history file generation, export control enforcement, and audit readiness intelligence. Built in Rust. Compliance enforced by architecture, not process discipline.
Sentinel is not a compliance module. It is a governance layer embedded in the database write path.
Traditional PLM systems add compliance as a workflow overlay — a separate approval chain bolted onto existing data management. Axiom Sentinel inverts this architecture: compliance governance is embedded directly in the database write layer. Every mutation to a governed record passes through the Sentinel interceptor before committing to the Axiom product knowledge graph. The interceptor evaluates export control authorization, captures electronic signatures, computes field-level audit deltas, and appends to WORM storage — all before the write commits. If any compliance check fails, the mutation is rejected at the database level, not at the UI level. Compliance is not enforced by process discipline. It is enforced by architecture.
The regulatory environment in 2026 demands this architectural rigor. FDA issued 327 warning letters in the second half of 2025 alone — a 73% increase over the same period in 2024. Data integrity remains the FDA's most significant compliance focus area, with approximately 80% of warning letters involving data integrity deficiencies. The EU published its first comprehensive revision of Annex 11 in July 2025 (the first major update since 2011), along with a new Annex 22 specifically governing AI and machine learning in pharmaceutical manufacturing, expected to finalize mid-2026. FDA's September 2025 Computer Software Assurance (CSA) guidance and January 2025 AI credibility framework further signal that regulatory expectations are simultaneously tightening and modernizing.
Sentinel supports eight regulatory frameworks simultaneously: FDA 21 CFR Part 11 (electronic records and signatures), FDA 21 CFR Part 820 (quality system regulation for devices), AS9100D (aerospace quality), IATF 16949 (automotive quality), ISO 13485 (medical device quality), ITAR/EAR (export control), RoHS/REACH/TSCA (substance compliance), and EU GMP Annex 11 (computerized systems). The framework rule engine determines which requirements apply to each record based on its classification, and the interceptor enforces them at the write path — silently, automatically, without requiring users to remember which rules apply.
Regulated manufacturers operate under stacking frameworks — a defense aerospace medical device company may simultaneously face FDA 21 CFR Part 11, AS9100D, ISO 13485, ITAR, and RoHS requirements on the same product record. Traditional PLM systems require users to manually determine which rules apply and manually route documents through the correct approval workflows. Sentinel eliminates this cognitive burden by classifying every record against its regulatory context and automatically enforcing the strictest applicable requirements. When a medical device design record is modified, the framework engine automatically determines that it requires Part 11 electronic signatures, Part 820 design control documentation, ISO 13485 traceability, and ITAR access restriction — and enforces all four at the write path, before the change commits.
FDA warning letters consistently cite shared user credentials, disabled audit trails, and missing electronic signature controls. In September 2025, an FDA inspection documented that "System Administrator" was the only user type attributable in the software system, with laboratory personnel sharing a common password and audit trails not independently reviewed. Sentinel makes these failures architecturally impossible. Every user has a unique identity verified by multi-factor authentication. Every signature captures the signer's role and intent — "authored," "reviewed," "approved," "verified," or "witnessed" — at the moment of signature, not inferred after the fact. Every signature is cryptographically bound to the exact document hash, meaning any post-signature modification invalidates the signature and generates an immediate alert. The EU's draft Annex 11 revision mandates multi-factor authentication and locks audit trails to always-on, matching controls Sentinel has enforced since inception.
The audit trail is the single most scrutinized element in any FDA inspection. Disabled audit trails, unreviewed audit logs, and shared user credentials appear in warning letters with alarming regularity. Between 2014 and 2018, approximately 50% of FDA drug manufacturing inspection 483s cited data integrity problems, and 79% of warning letters included data integrity deficiencies. Enforcement has only intensified: CDER warning letters rose 50% in FY2025. Sentinel's audit trail is not a feature that can be turned off. It is a structural property of the database architecture — every write operation automatically generates an immutable audit entry capturing who, what, when, and why at field-level granularity. The entry is appended to WORM storage and linked via SHA-256 hash chain to the previous entry, making any insertion, modification, or deletion of audit records cryptographically detectable.