claude

code-modernization

Modernize legacy codebases (COBOL, legacy Java/C++, monolith web apps) with a structured preflight / assess / map / extract-rules / brief / reimagine / transform / harden workflow, an interactive topology viewer, and specialist review agents

1 on GitHubby AnthropicApache-2.0updated 2 months agodevelopment
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Plugin code-modernization from marketplace bodnar-agent-plugins in danielbodnar/agent-plugins. Commands read from the repo's manifest — 1 month ago.

What it installs

Slash commands (9)

  • /code-modernization:modernize-assess

    Full discovery & portfolio analysis of a legacy system — inventory, complexity, debt, effort estimation

  • /code-modernization:modernize-brief

    Generate a phased Modernization Brief — the approved plan that transformation agents will execute against

  • /code-modernization:modernize-extract-rules

    Mine business logic from legacy code into testable, human-readable rule specifications

  • /code-modernization:modernize-harden

    Security vulnerability scan with a reviewable remediation patch — OWASP, CWE, CVE, secrets, injection

  • /code-modernization:modernize-map

    Dependency & topology mapping — call graphs, data lineage, batch flows, rendered as navigable diagrams

  • /code-modernization:modernize-preflight

    Environment readiness check — analysis tools, build toolchain, source completeness, telemetry access

  • /code-modernization:modernize-reimagine

    Multi-agent greenfield rebuild — extract specs from legacy, design AI-native, scaffold & validate with HITL

  • /code-modernization:modernize-status

    Where am I in the modernization workflow — artifact inventory, staleness, secrets hygiene, next step

  • /code-modernization:modernize-transform

    Transform one legacy module to the target stack — idiomatic rewrite with behavior-equivalence tests

Subagents (5)

  • architecture-critic

    Reviews proposed target architectures and transformed code against modern best practice. Adversarial — looks for over-engineering, missed requirements, and simpler alternatives.

  • business-rules-extractor

    Mines domain logic, calculations, validations, and policies from legacy code into testable Given/When/Then specifications. Use when you need to separate "what the business requires" from "how the old code happened to implement it.

  • legacy-analyst

    Deep-reads legacy codebases (COBOL, Java, .NET, Node, anything) to build structural and behavioral understanding. Use for discovery, dependency mapping, dead-code detection, and "what does this system actually do" questions.

  • security-auditor

    Adversarial security reviewer — OWASP Top 10, CWE, dependency CVEs, secrets, injection. Use for security debt scanning and pre-modernization hardening.

  • test-engineer

    Writes characterization, contract, and equivalence tests that pin down legacy behavior so transformation can be proven correct. Use before any rewrite.

View source on GitHub code.claude.com

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