modernize-reimagine

modernize-reimagine is a skill for Claude Code from MinhThang1009/dotclaude. It costs 58 tokens per session (888 once invoked), scanned A, original, MIT.

A multi-agent process for rebuilding a legacy system from its intended behaviour rather than copying its old structure. It extracts business rules, interfaces, and domain entities before proposing an AI-native design.

In plain words
What is it for?
Mining specifications from legacy code, documenting business rules and integrations, modelling core entities, designing a replacement, and scaffolding and validating the new system.
Why use it?
It helps replace an outdated system while preserving what the system is supposed to do, with human checkpoints during the work.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions CLAUDE.md; positional $N argument.

Part of the code-modernization plugin — 7 skills, 5 agents shipped together

Good fit Mining specifications from legacy code, documenting business rules and integrations, modelling core entities, designing a replacement, and scaffolding and validating the new system.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/minhthang1009/dotclaude/modernize-reimagine
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add MinhThang1009/dotclaude --skill modernize-reimagine
Clone the repo
git clone --depth 1 https://github.com/MinhThang1009/dotclaude

Made for: Claude Code.

Or install code-modernization, the plugin that ships this one along with the rest of its 7 skills, 5 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for modernize-reimagine

README.md
[![agentmods](https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-reimagine/github.svg)](https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-reimagine)
Your own site
<a href="https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-reimagine"><img src="https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-reimagine/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for modernize-reimagine

Your own site · 80×15
<a href="https://agentmods.dev/skills/minhthang1009/dotclaude/modernize-reimagine"><img src="https://agentmods.dev/badge/skills/minhthang1009/dotclaude/modernize-reimagine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 888 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.00888
Opus 5 $0.00029 $0.00444
Sonnet 5 $0.00012 $0.00178
Haiku 4.5 $0.00006 $0.00089

Measured 11d ago against content hash 2f3d81747304, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

modernize-reimagine scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/code-modernization/skills/modernize-reimagine/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reimagine legacy/$1 as: $2

This is not a port — it's a rebuild from extracted intent. The legacy system becomes the specification source, not the structural template. This command orchestrates a multi-agent team with explicit human checkpoints.

Phase A — Specification mining (parallel agents)

Spawn concurrently and show the user that all three are running:

  1. business-rules-extractor — "Extract every business rule from legacy/$1 into Given/When/Then form. Output to a structured list I can parse."

  2. legacy-analyst — "Catalog every external interface of legacy/$1: inbound (screens, APIs, batch triggers, queues) and outbound (reports, files, downstream calls, DB writes). For each: name, direction, payload shape, frequency/SLA if discernible."

  3. legacy-analyst — "Identify the core domain entities in legacy/$1 and their relationships. Return as an entity list + Mermaid erDiagram."

Collect results. Write analysis/$1/AI_NATIVE_SPEC.md containing:

  • Capabilities (what the system must do — derived from rules + interfaces)
  • Domain Model (entities + erDiagram)
  • Interface Contracts (each external interface as an OpenAPI fragment or AsyncAPI fragment)
  • Non-functional requirements inferred from legacy (batch windows, volumes)
  • Behavior Contract (the Given/When/Then rules — these are the acceptance tests)

Phase B — HITL checkpoint #1

Present the spec summary. Ask the user one focused question: "Which of these capabilities are P0 for the reimagined system, and are there any we should deliberately drop?" Wait for the answer. Record it in the spec.

Phase C — Architecture (single agent, then critique)

Design the target architecture for "$2":

  • Mermaid C4 Container diagram
  • Service boundaries with rationale (which rules/entities live where)
  • Technology choices with one-line justification each
  • Data migration approach from legacy stores

Then spawn architecture-critic: "Review this proposed architecture for $2 against the spec in analysis/$1/AI_NATIVE_SPEC.md. Identify over-engineering, missed requirements, scaling risks, and simpler alternatives." Incorporate the critique. Write the result to analysis/$1/REIMAGINED_ARCHITECTURE.md.

Read the full file on GitHub · 85 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 85 lines · 58 tokens per session scan A 2f3d81747304

Subscribe to this mod's changes

modernize-reimagine is a skill published in the GitHub repository MinhThang1009/dotclaude (20 stars, last pushed 1mo ago), licensed MIT. It adds 58 tokens to every session and 888 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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