Anth Upgrade Migration includes 9 code blocks for direct copy-paste. The SKILL.md is on the shorter side at about 398 words.
Anth Upgrade Migration sits in the Engineering category under the engineering-misc 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.
Anth Upgrade Migration is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/anth-upgrade-migration/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when upgrading the Python/TypeScript SDK, migrating from Text Completions to Messages API, or adopting new API features like tool use or batches. Trigger with phrases like "upgrade anthropic sdk", "anthropic migration", "update claude sdk", "migrate to messages api".
The Anth Upgrade Migration Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 120,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/anth-upgrade-migration curl -L https://claudskills.com/skills/anth-upgrade-migration/SKILL.md \ -o ~/.claude/skills/anth-upgrade-migration/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/anth-upgrade-migration/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/anth-upgrade-migration/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\anth-upgrade-migration\SKILL.md on Windows. See the full install guide for step-by-step instructions.
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 →
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.
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
SKILL.md from the source repository to ~/.claude/skills/anth-upgrade-migration/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.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. Anth Upgrade Migration is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{anth-upgrade-migration-2026,
author = {Jeremy Longshore <[email protected]>},
title = {Anth Upgrade Migration [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/anth-upgrade-migration/}
}Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.