Wraps @anthropic-ai/claude-agent-sdk so Claude Pro/Max subscribers (who
do not have a console API key) can use this library by authenticating
through the local `claude` CLI. Subscribers run `claude login` once and
the provider picks up the credentials automatically.
Provider behavior:
- query() is invoked in single-turn mode (maxTurns: 1, allowedTools: [])
to behave as plain text completion by default. Both knobs are
configurable for agentic use cases.
- Conversation history is flattened to a single prompt with role labels.
- doStream() emits text deltas as the SDK yields successive assistant
messages. doComplete() accumulates and returns the final result.
- SDKAssistantMessageError codes (authentication_failed, billing_error,
rate_limit, model_not_found, ...) map to AIErrorType variants.
- ClaudeCodeConfig.apiKey is optional — when omitted the SDK falls back
to ANTHROPIC_API_KEY or local subscription credentials. The base
validator is overridden to allow this.
Tradeoffs:
- Requires the `claude` CLI installed and logged in on the host. This
is not suitable for typical server-side production deployments; it is
the official path for subscription accounts.
- Higher latency (CLI process spawn) than the direct Anthropic API.
- The agent SDK is heavy. Bundle grows ~750KB; bun build now uses
--target node so the SDK's Node built-in imports resolve correctly.
Wired into PROVIDER_REGISTRY ('claude-code'), createClaudeCodeProvider,
SUPPORTED_PROVIDERS, and re-exported from the package entry.
Quick-win refactors from the Refactoring Guru catalog:
- Replace Magic Number with Symbolic Constant: extract DEFAULT_TIMEOUT_MS,
DEFAULT_MAX_RETRIES, DEFAULT_MAX_TOKENS, DEFAULT_TEMPERATURE, default
models per provider, and validation prompt into src/constants.ts.
- Parameterize Method: collapse validateTemperature / validateTopP /
validateMaxTokens (and the inline timeout/maxRetries checks) into a
single validateNumberInRange helper with bounds metadata.
- Inline Class / Remove Middle Man: drop the unused ProviderRegistry
class from utils/factory.ts. createProvider now dispatches through
the PROVIDER_REGISTRY const directly instead of a parallel switch.
Also fixes stale VERSION constant in src/index.ts (was 1.3.1).
