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docker-agent-windows-arm64.exe 2026-09-10 111.4 MB
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docker-agent-darwin-amd64 2026-09-10 119.2 MB
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docker-agent-linux-amd64 2026-09-10 138.9 MB
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README.md 2026-09-10 5.4 kB
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This release introduces generated image output support with workspace-safe storage and portable session blobs, a new tool hook execution model with mandatory phases, and several other feature additions and fixes.

What's New

  • Adds streaming support for model-generated media deltas, accumulating complete image bytes in runtime stream results
  • Adds workspace media writes with collision-safe naming, MIME-corrected extensions, and no-overwrite publication for generated images
  • Adds generated media materialization as workspace files with no-resend history placeholders stored in session JSON instead of raw base64
  • Keeps all generated-media writes inside the owning workspace; external, traversal, and symlink-escaping paths are redirected to a sanitized basename
  • Names generated media via private [media-file:] response markers with fallback to user-prompt filename, provider name, or generated-N
  • Renders generated images through manifest-gated authorization, revalidating against the current manifest on every resolution
  • Restores generated media from portable session blobs when resuming sessions
  • Adds output_capabilities.image configuration support to resolve image output capability from models.dev metadata
  • Guards image-output requests across Google surfaces (gateway, direct Gemini API, and Vertex), rejecting custom function tools and structured output before dispatch
  • Adds tool hook phases with a fixed mandatory execution order: tool_input_transform runs first, followed by tool_guard; includes hook deduplication, config validation, and a shared events catalog with centralized contracts
  • Adds provider_opts.service_tier field for OpenAI provider, forwarded unchanged to the underlying API for Fast mode support
  • Marks lean TUI user prompts with OSC 133 semantic prompt boundaries in terminal scrollback, enabling navigation between turns in supported terminals (e.g., iTerm2); also restores session transcripts when the lean TUI starts with a resumed session

Bug Fixes

  • Fixes Gemini session title generation by omitting thinkingConfig and reserving 128-token reasoning headroom with a separate 50-character visible title limit
  • Fixes session title selection to keep image-output-capable models eligible as title candidates
  • Fixes sanitization and bounding of generated-media metadata
  • Classifies generated-media save failures into safe, reportable reasons

Technical Changes

  • Reverts "fail fast on foreign-OS paths and explain path resolution" from the filesystem tool
  • Moves CI image builds to Docker Build Cloud
  • Reverts CI feedback-loop shortening changes (parallel jobs, warm Go cache, Build Cloud pipeline)
  • Fixes CI image builds for fork pull requests that lack cloud credentials

What's Changed

Full Changelog: https://github.com/docker/docker-agent/compare/v1.137.0...v1.138.0

Source: README.md, updated 2026-09-10