OI Labs

Agentic SDLC Platforms

OI NEBULA™ End-to-End Software EngineeringOI GORDIAN™ Legacy modernizationOI GANTRY™ Coding Assistant SupervisionSee all platforms

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For Legacy System Owners

Legacy Modernization

Gordian analyzes your existing applications and pulls out the business rules, workflows, dependencies, and data relationships buried in the code. You get validated documentation before your transformation program begins, so scope, cost, and risk are based on facts.

The problem it solves

Many modernization programs slow down because legacy systems are difficult to understand. Documentation is outdated, knowledge is fragmented, and discovery can take months.

GORDIAN specs and rules run through the replay engine to give simulated outputs; the mainframe or target machine is traced to give execution traces of inputs, outputs and state. The two are compared, pass or fail, in the rule validator, which produces a validation report. GORDIAN Specs / Rules Mainframe / Target Machine Replay Engine Sensor / Trace Simulated Outputs Replay engine result Execution Traces Inputs, outputs, state Pass / Fail Compare Rule Validator Validation Report

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What OI GORDIAN™ gives you

  1. A clear picture of how the system works

    business rules, workflows, dependencies, system behavior, data structures, and application-to-data relationships, extracted directly from the code.

  2. Documentation your teams can use right away

    business requirements, architecture and flow diagrams, API specifications, and test plans.

  3. Answers in plain language

    ask questions about the system and get answers your experts can check and refine.

  4. Knowledge that stays with you

    Gordian builds a searchable knowledge graph of the application, so what you learn is available to every team that needs it, even for codebases with millions of lines.

Turns understanding into delivery ready output

Generates real documentation

Business requirements, architecture and flow diagrams, API specifications, and test plans, automatically.

De-risks the modernization program

Replaces guesswork with a validated system model before any migration budget is committed.

Removes the SME bottleneck

Cuts discovery time from months to days, without relying on the one person who remembers how it works.

Where it's used

Modernization programs

Get the scope right before you commit to a rewrite, re-platforming, or cloud migration.

Undocumented core systems

Rebuild the documentation nobody kept, without pulling engineers off delivery to write it by hand.

Regulated environments

Show auditors and compliance teams what a system does and why.

Ready to find out what your system really does?

We start by qualifying your system, then send a fixed fee proposal for the assessment. No open ended engagement.

Our other platforms

NEBULA™

End-to-End Software Engineering

Specialized agents deliver tested software, with your engineers approving each step.

Learn more
GANTRY™

Automate Your Coding Assistant

Real-time supervision for Cursor, Claude Code, and GitHub Copilot.

Learn more