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Agent skill

Clade Migration Deep Dive

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns.

MITAuto-check passedAI & LLM Engineering

Install Clade Migration Deep Dive

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-migration-deep-dive -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace clade-migration-deep-dive --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/clade-migration-deep-dive .claude/skills/clade-migration-deep-dive && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
clade-migration-deep-dive
GitHub stars
2.8k
Token cost
~1.1k tokens
SKILL.md length
294 words
Files
2 (incl. references)
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns.

  • Works in 2 steps: Before (OpenAI) → After (Anthropic)
  • Working with migration-deep-dive patterns
  • SKILL.md covers Overview, API Mapping, SDK Swap and Instructions, plus 9 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Clade Migration Deep Dive is an agent skill from jeremylongshore/tons-of-skills-marketplace. Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns. prompt adaptation, SDK swap, and feature mapping. Trigger with "migrate to claude", "openai to anthropic", "switch from gpt to claude", "replace openai with anthropic".

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/one-pager.md`). Compatibility notes: Designed for Claude Code

It sits in AI & LLM Engineering, covering LLM API integration and Structured output and tool calling. It works with OpenAI and Anthropic API. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Working with migration-deep-dive patterns
  • With migrate to claude
  • Openai to anthropic
  • Switch from gpt to claude

Example prompts

  • “migrate to claude”
  • “openai to anthropic”
  • “switch from gpt to claude”
  • “/clade-migration-deep-dive”

Requirements

  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Grep

Workflow steps

2 steps, taken from the step headings in SKILL.md.

  1. Before (OpenAI)
  2. After (Anthropic)

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript and bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • platform.claude.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Clade Migration Deep Dive loads about 1.1k tokens when it runs, and up to ~1.6k if it reads all its reference files. Until then it costs about 77 tokens; SKILL.md has 294 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~77
When it runs · the whole SKILL.md, loaded when a task matches
~1.1k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 294 words, ~1,130 tokens.

Download SKILL.mdSave it as .claude/skills/clade-migration-deep-dive/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
clade-migration-deep-dive
description
Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns. prompt adaptation, SDK swap, and feature mapping. Trigger with "migrate to claude", "openai to anthropic", "switch from gpt to claude", "replace openai with anthropic".
allowed-tools
Read, Write, Edit, Grep
compatibility
Designed for Claude Code
version
1.1.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
saas, anthropic, claude, migration, openai

Migrate from OpenAI to Anthropic

Overview

Migrate from OpenAI/GPT to Anthropic/Claude. Covers the complete API mapping (endpoints, models, response shapes), SDK swap with before/after code, five key differences (max_tokens required, system as top-level param, alternating messages, response path, streaming events), and tool use migration.

API Mapping

OpenAIAnthropicNotes
openai.chat.completions.create()anthropic.messages.create()Different request/response shape
model: 'gpt-4o'model: 'claude-sonnet-4-20250514'Different model IDs
response.choices[0].message.contentresponse.content[0].textDifferent response path
system in messages arraysystem as separate parameterClaude uses top-level system
response_format: { type: 'json_object' }System prompt: "Respond in JSON only"No native JSON mode
tools / function_callingtools (similar but different schema)Input schema differences
openai.embeddings.create()N/A — use Voyage or CohereNo embeddings API

SDK Swap

Instructions

Step 1: Before (OpenAI)
typescript
import OpenAI from 'openai';
const openai = new OpenAI();

const response = await openai.chat.completions.create({
  model: 'gpt-4o',
  messages: [
    { role: 'system', content: 'You are helpful.' },
    { role: 'user', content: 'Hello' },
  ],
});
console.log(response.choices[0].message.content);
Step 2: After (Anthropic)
typescript
import Anthropic from '@claude-ai/sdk';
const anthropic = new Anthropic();

const response = await anthropic.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024, // Required (not optional like OpenAI)
  system: 'You are helpful.', // Separate from messages
  messages: [
    { role: 'user', content: 'Hello' },
  ],
});
console.log(response.content[0].text);

Key Differences

  1. max_tokens is required — OpenAI defaults it, Anthropic requires it
  2. system is a top-level param — not a message in the array
  3. First message must be user — can't start with assistant
  4. Messages must alternate — no two user or two assistant messages in a row
  5. Response shape — content[0].text not choices[0].message.content
  6. Streaming events — different event types and structure

Tool Use Migration

typescript
// OpenAI tool definition
{ type: 'function', function: { name: 'get_weather', parameters: { ... } } }

// Anthropic tool definition
{ name: 'get_weather', input_schema: { ... } }  // Flatter structure

Grep & Replace

bash
# Find all OpenAI imports
grep -rn "from 'openai'" --include="*.ts" .
grep -rn "import OpenAI" --include="*.ts" .

# Find response access patterns to update
grep -rn "choices\[0\]" --include="*.ts" .
grep -rn "message.content" --include="*.ts" .  # May need updating

Output

  • All openai imports replaced with @claude-ai/sdk
  • Response access patterns updated (choices[0].message.content → content[0].text)
  • System prompts moved from messages array to top-level system parameter
  • max_tokens added to all API calls (required, not optional)
  • Tool definitions restructured to Anthropic format

Error Handling

ErrorCauseSolution
API ErrorCheck error type and status codeSee clade-common-errors

Examples

See API Mapping table, Before/After SDK code, Key Differences list, Tool Use Migration, and Grep & Replace commands above.

Resources

Next Steps

See clade-sdk-patterns for production Anthropic SDK patterns.

Prerequisites

  • Existing OpenAI integration to migrate
  • Access to codebase with search capability
  • Test suite for comparing outputs between providers

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/.curated/clade-migration-deep-dive of jeremylongshore/tons-of-skills-marketplace.

  • SKILL.md
  • references/one-pager.md

Open the folder on GitHubat commit cfae287

Compare with similar skills

Clade Migration Deep Dive next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Clade Migration Deep Dive compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Clade Migration Deep Dive this skilljeremylongshore/tons-of-skills-marketplace2.8k—~1.1kAutomated safety check: PassMIT
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ModLens Image Vision Bridgeliustack/modlens4.2k—~1.3kAutomated safety check: NotesMIT
Claude APIKocoro-lab/Kocoro4147 repos~4.5kAutomated safety check: PassApache-2.0
Perfupraullenchai/Rapid-MLX4k—~1.6kAutomated safety check: NotesCustom licence
Using Ccproxy Inspectorstarbaser/ccproxy350—~2.7kAutomated safety check: PassCustom licence

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Works with

Categories

Questions about Clade Migration Deep Dive

What does Clade Migration Deep Dive do?

Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns. Clade Migration Deep Dive is an agent skill from jeremylongshore/tons-of-skills-marketplace. Migrate from OpenAI/GPT to Anthropic/Claude — API differences, Use when working with migration-deep-dive patterns.

When should I use Clade Migration Deep Dive?

Clade Migration Deep Dive fits situations like: working with migration-deep-dive patterns; with migrate to claude; openai to anthropic; switch from gpt to claude.

How do I install Clade Migration Deep Dive in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-migration-deep-dive -a claude-code`. Or copy the skill folder (skills/.curated/clade-migration-deep-dive in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/clade-migration-deep-dive in your project. Claude Code loads it when a task matches its description.

How do I install Clade Migration Deep Dive in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-migration-deep-dive -a codex`. Or copy the skill folder (skills/.curated/clade-migration-deep-dive in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/clade-migration-deep-dive in your project. Codex loads it when a task matches its description.

Can I use Clade Migration Deep Dive in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-migration-deep-dive -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/clade-migration-deep-dive, .gemini/skills/clade-migration-deep-dive, .github/skills/clade-migration-deep-dive and .opencode/skills/clade-migration-deep-dive in your project.

What does Clade Migration Deep Dive need to run?

SKILL.md names no scripts, command-line tools or credentials: Clade Migration Deep Dive is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Clade Migration Deep Dive access the network?

SKILL.md names 1 domain. As links in the text: platform.claude.com. This is read from the text; nothing was executed.

Is Clade Migration Deep Dive safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Clade Migration Deep Dive use?

Clade Migration Deep Dive is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Clade Migration Deep Dive use?

About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 426 tokens, read only when the agent opens those files.

What are the alternatives to Clade Migration Deep Dive?

Skills that share tags, products or a category with Clade Migration Deep Dive: Claude Cookbooks Reference (2025Emma/vibe-coding-cn, 23k stars), ModLens Image Vision Bridge (liustack/modlens, 4.2k stars), Claude API (Kocoro-lab/Kocoro, 414 stars) and Perfup (raullenchai/Rapid-MLX, 4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Clade Migration Deep Dive?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.