v0.5.0

Added

• Agents can set effort in the manifest.
• Slack messages with images, PDFs, and text files reach the model.
• Slack replies carry the images the model makes.
• Add a blob store for message attachments and generated images. The local engine keeps the bytes in its database.
• Add a client endpoint that serves stored blobs.

Fixed

• subs serve --slack-agent stops at startup if the name is not a declared agent.
• A model that refuses a request stops the run, instead of answering it with nothing.
• Anthropic calls send the reasoning fields, the output limit, and the sampling that the model reads.
• OpenAI calls read the whole model name, and keep temperature for chat models and at no effort.
• OpenRouter calls keep a deferred tool out of the request, as the other providers do.
• An uauthorized mcp interrupts the session.
• Streamed calls now read data: lines that have no space after the colon.
• Responses keep the model's reasoning, and Anthropic and OpenRouter calls send it back.
• Calls to OpenAI-compatible providers no longer send engine-internal message fields.
• Engine context added inline keeps a message's image parts.