Goose v1.58.0 adds context window reporting and new declarative providers

The release adds an opt-in context relevance operation and a context window report with a viewer. It also brings new provider options: declarative providers for AIHubMix and RouterPlex, and a Lemonade provider.

Several provider fixes are included. OpenAI Responses reasoning is now replayed across tool turns, 429 responses honor Retry-After when they are mapped outside handle_status, and typed context_length_exceeded errors are classified as context overflow on OpenRouter. The iflytek_astron provider replaces the retired Spark X2 with Spark X2.5.

Changes outside the providers include thinking collapsed by default in the desktop app with a setting to control it, and the current session ID shown in /status. The release replaces Agent and AgentManager with one StateMachineServices per process and removes ACP client-delegated developer tools.

Developers who route goose through OpenAI-compatible or aggregator endpoints get new provider choices and fewer context overflow and retry problems. Anyone who depended on ACP client-delegated developer tools will need another approach, because that support is removed in this release. Scheduled runs now use recipe settings, so check scheduled jobs after upgrading.