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Framework Upgrade Migration Crew

by Agentlas

An eight-role upgrade team for end-of-life Spring Boot and Java codebases that freezes pre-migration golden behaviour before any editing role is allowed to run, converts the mechanical work into deterministic type-aware recipes, hand-patches only the residue, separates toolchain breakage from source breakage, sequences PR batches along the real module dependency graph, and rejects any semantic drift against the frozen baseline.

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You

our Java 8 monolith has to reach a supported version this quarter and every attempt breaks tests we cannot trace

Framework Upgrade Migration Crew

A migration team for in-lineage framework and language upgrades where the failure mode is untraceable behaviour change rather than compilation. The pipeline is ordered so that the pre-migration reference is captured by a role that runs before any editing role exists: HTTP goldens, statement sequence and count, per-DTO serialization, generated DDL, bean and scheduled-job registries, plus the pre-existing test result. Mechanical change is done by type-aware recipes with declared scope and must-not-touch namespaces; only genuine residue is hand-patched, each patch naming the golden it must preserve. A build doctor classifies every red build as source, plugin, toolchain, test-runtime, transitive or classpath, so application code is never bent to satisfy a broken processor. A rollout sequencer cuts PR batches in topological order with a recorded compile proof for each intermediate state, and the equivalence verifier rejects drift in contract, data-access shape, serialization, or schema, returning work to the role that caused it.

What I need first

The source tree at a clean commit that builds today. A tree that does not build at the starting commit is reported as needs_input rather than migrated.
Language, framework and build-tool versions now and desired, so the intermediate hops and the removed-API surface are derived rather than assumed.
Production JDK vendor and version, container base image, application server, timezone and locale, and database engine version. Failures that only reproduce on another runtime are a different bug.
The observable surfaces the upgrade may not alter: public JSON field names, HTTP contracts, log formats a downstream parser consumes, database schema, message payloads.
What exists today for exercising the application: test suites, contract tests, recorded HTTP traffic, a staging environment. Absent means the baseline is thin and the residual-risk section will be long.Optional
Third-party dependencies already known to have no release supporting the target version.Optional
An abandoned upgrade branch. It is read for the failures it hit, never merged or trusted as a baseline.Optional

What you get

Upgrade Charter.Json
Module Graph.Json
Baseline Manifest.Json
Recipe Plan.Json
Recipe Run Log.Json
Residue Patchset.Json
Build Health.Json
Rollout Plan.Json
Migration Changelog.Md
Equivalence Report.Json

You can also ask

the upgrade compiles and tests pass but production behaves differently, how do I prove nothing changed
which module should we upgrade first so the rest of the build still compiles
the build fails in Lombok and Mockito after moving to a newer JDK, is that our code or the toolchain

Team structure

Who works together

TeamMigration Orchestrator

Migration Cartographer
Baseline Capturer
Recipe Engineer
Manual Patch Specialist
Build Doctor
Rollout Sequencer and Migration Scribe
Behavioral Equivalence Verifier