Blog - Abbas ElDeniney

About this skill

# Building LLM-Powered Applications with Claude

This skill helps you build LLM-powered applications with Claude. Choose the right surface based on your needs, detect the project language, then read the relevant language-specific documentation.

Before You Start

Scan the target file (or, if no target file, the prompt and project) for non-Anthropic provider markers — import openai, from openai, langchain_openai, OpenAI(, gpt-4, gpt-5, file names like agent-openai.py or *-generic.py, or any explicit instruction to keep the code provider-neutral. If you find any, stop and tell the user that this skill produces Claude/Anthropic SDK code; ask whether they want to switch the file to Claude or want a non-Claude implementation. Do not edit a non-Anthropic file with Anthropic SDK calls.

Output Requirement

When the user asks you to add, modify, or implement a Claude feature, your code must call Claude through one of:

1. The official Anthropic SDK for the project's language (anthropic, @anthropic-ai/sdk, com.anthropic.*, etc.). This is the default whenever a supported SDK exists for the project.

2. Raw HTTP (curl, requests, fetch, httpx, etc.) — only when the user explicitly asks for cURL/REST/raw HTTP, the project is a shell/cURL project, or the language has no official SDK.

Never mix the two — don't reach for requests/fetch in a Pytho

…

Use cases

**Complexity** — Is the task multi-step and hard to fully specify in advance? (e.g., "turn this design doc into a PR" vs. "extract the title from this PDF")
**Value** — Does the outcome justify higher cost and latency?
**Viability** — Is Claude capable at this task type?
**Cost of error** — Can errors be caught and recovered from? (tests, review, rollback)
User asks for "latest" or "current" information
Cached data seems incorrect

Installation

Download the ZIP using the button on the right.
Unzip the folder.
Drop the claude-api/ folder inside ~/.claude/skills/.
Restart Claude Code (or your Claude Desktop session) — the skill loads automatically.

# macOS / Linux
mkdir -p ~/.claude/skills
unzip claude-skill-claude-api.zip -d ~/.claude/skills/

What's included

LICENSE.txt

SKILL.md

csharp/claude-api.md

go/claude-api.md

go/managed-agents/README.md

java/claude-api.md

java/managed-agents/README.md

php/claude-api.md

php/managed-agents/README.md

python/claude-api/README.md

python/claude-api/batches.md

python/claude-api/files-api.md

python/claude-api/streaming.md

python/claude-api/tool-use.md

python/managed-agents/README.md

ruby/claude-api.md

ruby/managed-agents/README.md

shared/agent-design.md

shared/error-codes.md

shared/live-sources.md

shared/managed-agents-api-reference.md

shared/managed-agents-client-patterns.md

shared/managed-agents-core.md

shared/managed-agents-environments.md

shared/managed-agents-events.md

shared/managed-agents-memory.md

shared/managed-agents-multiagent.md

shared/managed-agents-onboarding.md

shared/managed-agents-self-hosted-sandboxes.md

shared/managed-agents-tools.md

shared/managed-agents-webhooks.md

shared/model-migration.md

shared/models.md

shared/prompt-caching.md

shared/tool-use-concepts.md

typescript/claude-api/README.md

typescript/claude-api/batches.md

typescript/claude-api/files-api.md

typescript/claude-api/streaming.md

typescript/claude-api/tool-use.md

typescript/managed-agents/README.md

Frequently asked

What does the Claude Api skill do?

"Build, debug, and optimize Claude API / Anthropic SDK apps. Apps built with this skill should include prompt caching. Also handles migrating existing Claude API code between Claude model versions (4.5 → 4.6, 4.6 → 4.7, retired-model replacements). TRIGGER when: code imports `anthropic`/`@anthropic-ai/sdk`; user asks for the Claude API, Anthropic SDK, or Managed Agents; user adds/modifies/tunes a Claude feature (caching, thinking, compaction, tool use, batch, files, citations, memory) or model (Opus/Sonnet/Haiku) in a file; questions about prompt caching / cache hit rate in an Anthropic SDK project. SKIP: file imports `openai`/other-provider SDK, filename like `*-openai.py`/`*-generic.py`, provider-neutral code, general programming/ML."

Who should use it?

Anyone working with Claude on development-related tasks — consultants, founders, product teams, operators, and AI users who want repeatable, high-quality outputs from Claude.

How does it work?

Drop the folder into your `~/.claude/skills/` directory. Claude detects the SKILL.md instructions automatically and applies them when relevant.

What problem does it solve?

It removes the need to re-prompt Claude with the same context every time. Once the skill is installed, Claude already knows the rules, conventions, and procedures for this task.

How do I install it?

Download the ZIP, unzip it, and place the `claude-api/` folder inside `~/.claude/skills/`. No other setup required.

Is it free?

Yes — free download. We just ask for your name and work email so we can send useful Claude updates.

Can I get a custom version?

Yes. Abbas ElDeniney builds tailored Claude skills for specific business workflows and data sources. Book a consultation to scope your version.

Claude Api