Feature: Claude CLI support

[xdearboy]

Feature: Claude CLI support

It would be great to add support for using Claude CLI / Claude Code authentication as an AI provider, similar to the existing Codex CLI authentication support.

Currently, Mapr supports OpenAI/OpenAI-compatible providers and has a dedicated codex-cli authentication mode. It would be useful to have an equivalent option for users who already have Claude Code configured locally.

Proposed behavior

Add a provider/authentication option such as:

Provider: Anthropic
Authentication:
  - API key
  - Claude CLI

When Claude CLI is selected, Mapr could reuse the user's existing Claude Code authentication/session rather than requiring a separate Anthropic API key.

For example:

npx @redstone-md/mapr \
  --headless \
  --provider-type anthropic \
  --auth-method claude-cli

The exact CLI/API implementation can be chosen based on what is most appropriate for Claude Code.

Why this would be useful

• Users who already use Claude Code wouldn't need to configure another API key.
• It would make Claude a first-class provider alongside the existing Codex CLI integration.
• It would be especially useful for local development and interactive usage.
• It would provide a consistent authentication experience between OpenAI/Codex and Anthropic/Claude.

Additional consideration

Ideally, Claude CLI support should integrate with Mapr's existing provider/model selection and streaming pipeline rather than introducing a completely separate analysis path.

I would be happy to test the implementation once available.