Fractal OSI

Fractal OSI is a production-grade, multi-tenant platform for visual object-relationship modeling — and the project on which the practice later formalized as the STRATA Protocol was discovered by doing.

The platform's defining idea is a three-layer modeling discipline — meta-model, model, instance: users define their own classes (the meta-model), instantiate them as nodes, connect them with first-class typed links, and nest canvases recursively — every model can live inside a larger one. Its domain language, FML (Fractal Modeling Language), types nodes as Entity / Role / Act and treats links as instances in their own right: a link has a class, values, and source/target references, and can itself be the target of another link. Objects, links, and links-to-links are all first-class citizens. This is a genuinely uncommon data model; most graph editors treat edges as dumb connectors.

The OSI in the name is the platform's ontological-semantics ambition: a layer of controlled vocabulary, taxonomy, and ontology so that humans and AI share one unambiguous meaning over every model — not just shapes on a canvas, but a structured, machine-legible representation of reality.

What it delivers

The platform is built on Vue 3.5, Vite, Pinia, Vue Flow, TypeScript, and Vitest, with a production-shaped engineering surface:

• Multi-tenancy throughout. Every data operation is scoped to an active team context. Users switch between personal and team workspaces; assets, collections, and storage-provider configurations are invalidated on team switch. Team membership flows through invitations and an invite-only onboarding mode.
• Full authentication and session security. Cookie-based sessions with CSRF protection via the double-submit cookie pattern; two-factor authentication with a temporary, locked-down pre-upgrade session that cannot reach protected endpoints; rate-limited auth flows; router guards backed by a single-flight bootstrap.
• Digital assets and storage providers. A pluggable provider abstraction lets tenants configure where their assets live; digital assets and collections are first-class, with their own API and state management layers.
• AI schema generation — deterministic first. A hybrid engine resolves common business entities (Customer, Invoice, PurchaseOrder, and similar) in under 50 milliseconds with zero model cost; an AI fallback generates schemas for novel or domain-specific entities only when no canonical match exists. The result: roughly 70–80% of schemas resolve without an LLM call, while the model remains available as a bounded, controlled fallback for open-ended cases.
• Chrome-less embeddable canvas. The live, interactive canvas can be embedded into any external application via a chrome-less route driven entirely by URL parameters. Read-only mode is achieved without modifying the canvas component — purely through document-status wiring already present in the system. This capability is reused by the companion site fractalosi.com and by strataprotocol.org to embed live diagrams inline.
• Document governance, billing, and audit logging. A document status machine, billing-plan feature gating, and a full audit event log round out the platform's enterprise surface.
• A 4,800+-test suite. The quality gate — type-check, build, and the full test suite — runs on every iteration, non-negotiably.

The public surface: fractalosi.com

The platform's front door is fractalosi.com — a Nuxt / Docus site that serves as the product's homepage and documentation, and as the first step of the customer funnel into the app. Like everything else here, it was built under the STRATA Protocol.

The companion site is not a separate product. It runs on the same backend as app.fractalosi.com, so the two domains share one identity surface: a user authenticated on either is authenticated on both, with the same access rights and the same session. Marketing, documentation, and the application are three surfaces of a single Fractal OSI — a reader can move from a documentation page straight to the live canvas without signing in twice.

Where STRATA was discovered

Fractal OSI is the project on which the STRATA Protocol was first practiced, before it had a name. Each feature was prepared with a structured analysis and an implementation plan before a line of code was written, following fixed templates that made AI-assisted delivery consistent and auditable across every iteration. Deviations were captured explicitly and fed forward as context into the next phase — not silently absorbed. The phase-gated, human-validated execution loop that STRATA now formalizes as Methodology ran here first.

That lineage makes Fractal OSI both a portfolio artifact and the provenance record for the methodology's origin.

Cadence: the pace the discipline made possible

The core build sprint ran roughly four high-intensity months (November 2025 to February 2026), taking the platform from an empty repository to a multi-tenant, authenticated, AI-assisted modeling product — with authentication, teams, and the digital-asset layer all landing by early February. The system has been continuously refined ever since, adding the solutions catalog, edge rewiring, fractal-parent drill-down, the embeddable canvas, and legal hardening in the months that followed.