Modernize the software your business already runs on
Legacy systems hold years of business decisions, edge cases, and integration contracts. Source code is evidence, but it is not the whole specification. thursdai helps you understand a system before agents change it, and prove what changed after.
Understand it, change it, prove it
Modernization fails when it is treated as translation. The loop starts with what the system does and what must be preserved.
- DiscoverMap repositories, services, technologies, dependencies, owners, and interfaces.
- RecoverExtract the architecture decisions, policies, and business rules the system depends on.
- PlanDefine the target state, migration slices, and acceptance criteria, each tied to its source.
- BriefDeliver scoped context and rules into the agent, IDE, pull request, and CI.
- TransformPeople and agents refactor, migrate, or replace bounded components.
- VerifyCheck behavior, architecture, security, and technology policy. Advisory first.
- ProveKeep the decisions, exceptions, findings, and test evidence for every change.
Brownfield Modernization Baseline
A fixed-scope engagement across a bounded portfolio, with success measures agreed up front and an executive findings package at the end.
- An estate map of repositories, services, technologies, and dependencies
- A modernization readiness score
- A dependency and risk view
- Recovered standards, decisions, and business rules
- A prioritized modernization backlog
- Agent-ready context packages for your existing tools
- Baseline measures that later changes are compared against
The baseline becomes the control layer for the program
Governed agent briefings
Every contributor, human or agent, works from the same recovered context and rules.
Advisory merge gates
Migration patterns, approved technology, and service reuse are checked on every change.
Drift detection and evidence
Conformance trends, exceptions, and exportable evidence across the portfolio.
Built for established engineering organizations
Companies with 75 to 500+ engineers, enterprise-grade software risk, and a modernization mandate, often without a large enterprise’s platform and architecture teams.
- Common triggers
A cloud or platform migration, an acquisition integration, a monolith decomposition, an end-of-life framework, a new technology leader, or a program that has stalled.
- Signs you need it
Core applications older than five years, weak test coverage, acquired codebases, scarce institutional knowledge, or repeated incidents tied to legacy components.
- Who we work with
The CTO or VP of Engineering who owns the outcome, the platform or architecture leader who runs the program, and the security and compliance teams who need to sign off.
Start with the system that is blocking you.
Tell us about the program, the systems in scope, and what success looks like. We will come back with a baseline plan.