Sage AI Legacy Modernization Planning and Execution
Automate the journey from legacy code to migration plan to running modernized applications.
Sage Modernization combines agentic AI with Cognitive Pre-Compile, structured validation, and confidence scoring to produce predictable outcomes that match the legacy app with perfect affinity where you need it, and modern equivalents where you want it.
TLDR;
Modernization fails when you don't understand what you have, and when you don't have a good plan.
70% of large-scale modernizations fail (McKinsey). Not because of bad technology — because nobody fully understood the existing system before trying to replace it. Using Claude Code or any LLM alone can analyze only about 30% of a large codebase before hitting context limits. The other 70% gets guessed at. Sage analyzes 100%.
What Sage Adds
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Cognitive Pre-Compile
Pre-analyzed semantic intelligence across 100% of your codebase. Business rules, architecture layers, integration points, all indexed before planning begins.
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Affinity-Driven Migration
Not everything transcodes 1:1, and you probably don't want it to, anyway. Sage identifies and eliminates legacy constraints (such as a 9-invoice processing limit from report layout restrictions) and preserves business rules.
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Built-In Hallucination Prevention
Every claim about your legacy system is validated against the Cognitive Pre-Compile before it enters the plan. No fabricated file references. No invented business rules.
How It Works
Analyze
1
Start with Sage's Cognitive Pre-Compile for current architecture, business rules, data schemas, UI definitions, integration points, code and data mapping rules.
Plan
2
The Migration Planning Workflow selects a target subsystem, extracts rules, identifies what stays and what changes (affinity rules), designs target architecture and service boundaries, and maps the cutover strategy.
Validate
3
Every assumption is automatically checked against the source system. Derived business rules are re-validated against the Sage Cognitive Pre-Compile. No hallucinations make it into the plan.
Review
4
Human review. Guide architecture decisions. Make course corrections. Iterate until the plan is exactly right.
Generate
5
The validated plan feeds into a code generation workflow that produces containerized services, database schemas, deployment scripts, and a modern UI. Affinity rules govern what behavior stays and what changes. All output is validated against the ground truth of the Sage Cognitive Pre-Compile.
Ship
6
Stakeholders get a comprehensive HTML report covering the full analysis, the plan, and the generated artifacts. Review, approve, deploy.
Modernization starts with understanding what you actually have.
Petra Modernization Analysis
Petra represents a modern enterprise modernization challenge, interconnected systems, layered architecture, operational dependencies, and evolving technical debt.
Sage analyzed the platform end-to-end, mapped dependencies, identified modernization candidates, and generated a structured migration strategy.
Inside the report:
System architecture analysis
Dependency discovery
Technical debt visibility
Integration assessment
Migration planning
Modernization roadmap generation
Enterprise-scale modernization intelligence across the full application landscape
Explore Full Modernization Assessments
If Sage can untangle this, it can untangle yours
ACAS Payment Processing Analysis
A 48-year-old COBOL ERP system. Deeply embedded business rules. Decades of architectural sprawl.
Sage analyzed the entire platform, uncovered hidden operational constraints, mapped dependencies, and produced a complete modernization blueprint.
Inside the report:
Architecture analysis
Business rule discovery
Dependency mapping
Code translation strategy
Data migration planning
Deployment modernization
10 sections + 6 technical appendices
The legacy system limited payment processing to 9 invoices at a time. Sage identified the root cause and designed the modernization path to eliminate it.”
If you want to understand what really sits inside legacy systems,this video serieswalks through the technical realities behind enterprise modernization, from lost system knowledge to reconstructing architecture from code.
This report was generated for a real COBOL accounting system.
1M+ lines of legacy code across 619 files. 100% analyzed. Business rules no one remembered were in the code — surfaced automatically. Ready to see what Sage finds in yours?