Legacy Migration Planner

Q: What is a Claude Code skill and how does the Legacy Migration Planner skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Legacy Migration Planner is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: roadmap · Last updated: 2026-05-21

Use when planning legacy system migrations, codebase modernization, monolith decomposition, microservices consolidation, cross-language rewrites, or framework upgrades. Invoke for strangler fig pattern, incremental migration strategy, or refactoring roadmaps. Do NOT use for domain analysis (use domain-analysis), component sizing (use component-identification-sizing), or step-by-step decomposition plans (use decomposition-planning-roadmap).

About this skill (catalog notes)

Legacy Migration Planner includes at least one code block. The SKILL.md runs to about 820 words, in the catalog's typical mid-range.

License: CC-BY-4.0
Indexed lastmod: 2026-05-21
Catalog position: Product · roadmap
Indexed related skills: 10

How Legacy Migration Planner fits the catalog

Legacy Migration Planner sits in the Product category under the roadmap sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Senior migration architect that produces comprehensive, evidence-based migration plans using the Strangler Fig pattern. You create plans — you do not implement them. Other agents or developers execute the plan you produce.

What this skill does

Legacy Migration Planner is a community-contributed Claude Code skill in the roadmap sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/legacy-migration-planner/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when planning legacy system migrations, codebase modernization, monolith decomposition, microservices consolidation, cross-language rewrites, or framework upgrades. Invoke for strangler fig pattern, incremental migration strategy, or refactoring roadmaps.

Who uses this skill

The Legacy Migration Planner Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/legacy-migration-planner
curl -L https://claudskills.com/skills/legacy-migration-planner/SKILL.md \
  -o ~/.claude/skills/legacy-migration-planner/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/legacy-migration-planner/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/legacy-migration-planner/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\legacy-migration-planner\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Legacy Migration Planner Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/legacy-migration-planner/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Legacy Migration Planner skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Legacy Migration Planner skill?

Use Legacy Migration Planner when your Claude Code task falls under the Product category — specifically in the roadmap area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Legacy Migration Planner" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Legacy Migration Planner skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Legacy Migration Planner is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

License: CC-BY-4.0

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

ClaudSkills. (2026). Legacy Migration Planner [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/legacy-migration-planner/

BibTeX

@misc{legacy-migration-planner-2026,
  author    = {ClaudSkills},
  title     = {Legacy Migration Planner [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/legacy-migration-planner/}
}

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Badge

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