AI Provider Codegen Rules (@ax-llm/ax)

This skill helps an LLM generate correct AI provider setup and configuration code using @ax-llm/ax. Use when the user asks about ai(), providers, models, presets, embeddings, batch audio with ai.transcribe() or ai.speak(), extended thinking, context caching, or mentions OpenAI/Anthropic/Google/Azure/DeepSeek/Mistral/Cohere/Reka/Grok with @ax-llm/ax.

Install

Install only this skill for TypeScript:

npx skills add https://ax-llm.github.io/ax/typescript/ --skill 'ax-ai'

Published skill file: ax-ai/SKILL.md.

Source

• Source: src/ax/skills/ax-ai.md
• Version: 22.0.3

Skill Instructions

Use this skill to generate AI provider setup, configuration, and chat code. Prefer short, modern, copyable patterns. Do not write tutorial prose unless the user explicitly asks for explanation.

Quick Setup

import { ai } from '@ax-llm/ax';

const openai = ai({ name: 'openai', apiKey: 'sk-...' });
const claude = ai({ name: 'anthropic', apiKey: 'sk-ant-...' });
const gemini = ai({ name: 'google-gemini', apiKey: 'AIza...' });
const azure = ai({ name: 'azure-openai', apiKey: 'your-key', resourceName: 'your-resource', deploymentName: 'gpt-4' });
const deepseek = ai({ name: 'deepseek', apiKey: 'sk-...' });
const mistral = ai({ name: 'mistral', apiKey: 'your-key' });
const cohere = ai({ name: 'cohere', apiKey: 'your-key' });
const custom = ai({
  name: 'openai',
  apiKey: process.env.PROVIDER_API_KEY,
  apiURL: 'https://example.com/v1',
  config: { model: 'provider/model-name' },
});
const reka = ai({ name: 'reka', apiKey: 'your-key' });
const grok = ai({ name: 'grok', apiKey: 'your-key' });
const compatible = ai({ name: 'openai', apiKey: 'key', apiURL: 'https://api.example.com/v1', config: { model: 'provider/model' } });

Model Presets

import { ai, AxAIGoogleGeminiModel } from '@ax-llm/ax';

const gemini = ai({
  name: 'google-gemini',
  apiKey: process.env.GOOGLE_APIKEY!,
  config: { model: 'simple' },
  models: [
    { key: 'tiny', model: AxAIGoogleGeminiModel.Gemini20FlashLite, description: 'Fast + cheap', config: { maxTokens: 1024, temperature: 0.3 } },
    { key: 'simple', model: AxAIGoogleGeminiModel.Gemini20Flash, description: 'Balanced', config: { temperature: 0.6 } },
  ],
});

await gemini.chat({ model: 'tiny', chatPrompt: [{ role: 'user', content: 'Hi' }] });

Model Catalog

import { axGetSupportedAIModels } from '@ax-llm/ax';

const providers = axGetSupportedAIModels();
const openai = providers.find((provider) => provider.name === 'openai');
console.log(openai?.models[0]?.promptTokenCostPer1M);

const textProviders = axGetSupportedAIModels({ type: 'text' });
const embeddingProviders = axGetSupportedAIModels({ type: 'embeddings' });

Use axGetSupportedAIModels() to build provider/model selectors before creating an ai(...) instance. It returns bundled static metadata: provider names, display names, default models, raw AxModelInfo pricing/details, model type ('text', 'embeddings', 'code', or 'audio'), and normalized capability flags for thinking, thoughts, structured outputs, audio, temperature, and top-p support. Provider groups and models are sorted cheapest to most expensive based on bundled input + output token pricing; unpriced models sort last.

Filter with { type: 'all' | 'text' | 'embeddings' | 'code' | 'audio' } or an array of those values. The 'text' filter includes code-capable models; use 'code' to show only code-first models.

Dynamic providers such as Azure OpenAI deployments are marked with isDynamic: true and may have an empty or static-limited model list.

Chat

const res = await llm.chat({
  chatPrompt: [
    { role: 'system', content: 'You are concise.' },
    { role: 'user', content: 'Write a haiku about the ocean.' },
  ],
});
console.log(res.results[0]?.content);

Batch Audio

Use ai.transcribe(...) for batch speech-to-text and ai.speak(...) for batch text-to-speech. These are separate from conversational .chat() audio config.

const transcript = await llm.transcribe({
  audio: { data: base64Wav, format: 'wav' },
  model: 'gpt-4o-mini-transcribe',
  language: 'en',
});

const speech = await llm.speak({
  text: transcript.text,
  model: 'gpt-4o-mini-tts',
  voice: 'alloy',
  format: 'mp3',
});

console.log(transcript.text);
console.log(speech.data);

Providers without the requested audio endpoint throw AxMediaNotSupportedError. Use speech forward options for signature audio artifacts and modelConfig.audio for conversational chat audio.

Common Options

• stream (boolean): enable SSE; true by default
• thinkingTokenBudget: 'minimal' | 'low' | 'medium' | 'high' | 'highest' | 'none'
• showThoughts: include thoughts in output
• functionCallMode: 'auto' | 'native' | 'prompt'
• debug, logger, tracer, rateLimiter, timeout

Global Runtime Defaults

Use axGlobals when the app wants one live default for AI requests, generator runs, flows, or metrics:

import { ai, axGlobals, axCreateDefaultColorLogger } from '@ax-llm/ax';
import { trace } from '@opentelemetry/api';

axGlobals.tracer = trace.getTracer('my-app');
axGlobals.debug = true;
axGlobals.logger = axCreateDefaultColorLogger();
axGlobals.customLabels = { service: 'api' };

const llm = ai({ name: 'openai', apiKey: process.env.OPENAI_APIKEY! });

Rules:

• axGlobals.tracer, meter, logger, debug, abortSignal, and customLabels are live runtime defaults; future calls read the current value even if the AI instance already exists.
• Precedence is: per-call options, then explicit AI/service options, then current axGlobals, then built-in defaults.
• customLabels merge from globals to service to call options; later sources override earlier keys.
• abortSignal values are merged, so either a global shutdown signal or a local request signal can cancel the request.

DeepSeek Notes

import { ai, AxAIDeepSeekModel } from '@ax-llm/ax';

const deepseek = ai({
  name: 'deepseek',
  apiKey: process.env.DEEPSEEK_APIKEY!,
  config: { model: AxAIDeepSeekModel.DeepSeekV4Flash },
});

DeepSeek’s current API models are deepseek-v4-flash and deepseek-v4-pro. The deprecated deepseek-chat and deepseek-reasoner aliases are retained for compatibility until DeepSeek removes them on 2026-07-24.

DeepSeek V4 supports thinking mode. Ax sends thinking: { type: "disabled" } by default to preserve non-thinking behavior, and enables it when thinkingTokenBudget is set. Ax maps lower budget levels to DeepSeek’s high effort and maps highest to max. DeepSeek V4 thinking models support tools, but reject the tool_choice request parameter, so Ax omits forced/auto tool choice for deepseek-v4-pro, deepseek-v4-flash, and deepseek-reasoner while still sending tool definitions.

Extended Thinking

import { ai, AxAIAnthropicModel } from '@ax-llm/ax';

const claude = ai({
  name: 'anthropic',
  apiKey: process.env.ANTHROPIC_APIKEY!,
  config: { model: AxAIAnthropicModel.Claude48Opus },
});

const res = await claude.chat(
  { chatPrompt: [{ role: 'user', content: 'Solve step by step...' }] },
  { thinkingTokenBudget: 'medium', showThoughts: true },
);
console.log(res.results[0]?.thought);
console.log(res.results[0]?.content);

Budget Levels

Anthropic Model-Specific Behavior

• Opus 4.8 and 4.7: adaptive thinking, effort levels including 'xhigh', no manual budget_tokens, and no temperature / topP / topK.
• Opus 4.6: adaptive thinking, effort levels
• Opus 4.5: budget_tokens + effort levels (capped at 'high')
• Other thinking models: budget tokens only

Anthropic modelConfig.effort can be set directly on a request. Fast mode and task budgets are Anthropic-only opt-ins; taskBudget.total must be at least 20,000 tokens.

const res = await claude.chat({
  chatPrompt: [{ role: 'user', content: 'Review this migration plan.' }],
  modelConfig: {
    effort: 'xhigh',
    speed: 'fast',
    taskBudget: { type: 'tokens', total: 64_000 },
  },
});

Custom Thinking Levels

const claude = ai({
  name: 'anthropic',
  apiKey: '...',
  config: {
    model: AxAIAnthropicModel.Claude48Opus,
    thinkingTokenBudgetLevels: {
      minimal: 2048,
      low: 8000,
      medium: 16000,
      high: 25000,
      highest: 40000,
    },
    effortLevelMapping: {
      minimal: 'low',
      low: 'medium',
      medium: 'high',
      high: 'high',
      highest: 'max',
    },
  },
});

Embeddings

const { embeddings } = await llm.embed({
  texts: ['hello', 'world'],
  embedModel: 'text-embedding-005',
});

Context Caching

const result = await gen.forward(llm, { code, language }, {
  mem,
  sessionId: 'code-review-session',
  contextCache: {
    ttlSeconds: 3600,
    cacheBreakpoint: 'after-examples',
  },
});

Breakpoint values: 'system' | 'after-functions' | 'after-examples'

Provider behavior:

• Google Gemini: explicit caching with cache resource ID, auto TTL refresh
• Anthropic: implicit via cache_control markers

External Registry (serverless)

const registry: AxContextCacheRegistry = {
  get: async (key) => { /* redis.get */ },
  set: async (key, entry) => { /* redis.set */ },
};

AWS Bedrock

import { AxAIBedrock, AxAIBedrockModel } from '@ax-llm/ax-ai-aws-bedrock';

const bedrock = new AxAIBedrock({
  region: 'us-east-2',
  fallbackRegions: ['us-west-2'],
  config: { model: AxAIBedrockModel.ClaudeSonnet4 },
});

Vercel AI SDK Integration

import { ai } from '@ax-llm/ax';
import { AxAIProvider } from '@ax-llm/ax-ai-sdk-provider';
import { generateText } from 'ai';

const axAI = ai({ name: 'openai', apiKey: process.env.OPENAI_APIKEY! });
const model = new AxAIProvider(axAI);
const result = await generateText({
  model,
  messages: [{ role: 'user', content: 'Hello!' }],
});

MCP + AxJSRuntime

import { AxMCPClient } from '@ax-llm/ax';
import { axCreateMCPStdioTransport } from '@ax-llm/ax-tools';

const transport = axCreateMCPStdioTransport({
  command: 'npx',
  args: ['-y', '@anthropic/mcp-server-filesystem'],
});
const client = new AxMCPClient(transport);

Critical Rules

• Use ai() factory for all providers.
• Provider names: 'openai', 'openai-responses', 'anthropic', 'google-gemini', 'azure-openai', 'mistral', 'cohere', 'deepseek', 'reka', 'grok'
• Thinking constraints on Anthropic: Opus 4.8/4.7 omit temperature, topP, and topK; older thinking models ignore temperature and topK, with topP only sent if >= 0.95.
• Bedrock uses new AxAIBedrock(), not ai().
• Vercel AI SDK uses AxAIProvider wrapper.

Examples

Fetch these for full working code:

• Embeddings — embedding generation
• Anthropic Thinking — extended thinking with functions
• Anthropic Thinking Separation — thinking separation
• Anthropic Web Search — Anthropic web search
• OpenAI Web Search — OpenAI web search
• OpenAI Responses — OpenAI responses API
• o3 Reasoning — o3 reasoning
• Gemini Context Cache — Gemini context caching
• Gemini Files — Gemini file handling
• Grok Live Search — Grok live search
• OpenAI-Compatible — custom OpenAI-compatible base URL
• Vertex AI Auth — Vertex AI authentication
• MCP Stdio — MCP stdio transport
• MCP HTTP — MCP HTTP transport
• Telemetry — OpenTelemetry tracing
• Multi-Modal — image handling

Do Not Generate

• Do not use new AxAIOpenAI(...) or similar class constructors for standard providers; use ai().
• Do not hardcode provider class names when ai({ name: ... }) covers the provider.
• Do not mix thinkingTokenBudget with explicit temperature on Anthropic thinking models.
• Do not use ai() for AWS Bedrock; use new AxAIBedrock().
• Do not omit resourceName and deploymentName for Azure OpenAI.