v0.9

Changes in this release

• AgentBuilder — fluent builder API: Agent::build()->provider($p)->model($m)->tools([...])->middleware([...])->create()
• Exception hierarchy:
  • PapiException — base exception for all PapiAI errors
  • ProviderException — provider errors with status code and response body
  • RateLimitException — rate limit errors with optional retry-after
  • AuthenticationException — authentication failures
• CostEstimate — value object for estimating API call costs from token usage and model pricing
• 183 tests, 0 psalm errors