v1.2.90

Changelog (Current Version)

This file contains the changes for the current version only. The full history of all versions lives in docs/en/changelog.md.

v1.2.90

✨ New Features

• ACP Session Config Options

  • ACP now supports session/set_config_option and session/set_mode RPC methods, enabling clients to change model, mode, and thinking level per session without rebuilding the agent or provider.
  • Each session carries a consistent configOptions catalog in session/new, session/load, and session/resume results, and session/set_config_option notifies all connected clients of the updated options.
  • Configuration is persisted to the session history (model_change, mode_change, thinking_level_change entries) and replayed on session load, so bindings survive restarts and survive across multiple adapters sharing the same session.
  • Stable streamed message IDs (messageId on agent_message_chunk, agent_thought_chunk, and user_message_chunk updates) group chunks into logical messages per prompt turn.

• ACP Additional Directories

  • session/new, session/load, and session/resume accept an additionalDirectories array of absolute workspace roots. The tool registry resolves paths within these roots, and the sandbox mounts them as read-only (strict mode) or writable paths.
  • Directory sets are persisted as additional_directories session entries and restored on reload.
  • The session list endpoint (session/list) exposes additionalDirectories per session.

• ACP Standard Elicitation Form Protocol

  • When the client advertises elicitation.form in client capabilities, question requests use the standard ACP elicitation/create method instead of the legacy _mothx/request_question extension, with a typed requestedSchema envelope.
  • Replay gracefully falls back to the legacy extension shape when a reconnecting client does not advertise form support.

• ACP FileDiff Protocol Projection

  • Tool call updates now include a diff content type with path, oldText, and newText fields for semantic diff representation, alongside the existing text content. oldText is null for newly created files.
  • Tool call updates carry locations with the affected file path when a diff is present.

🔧 Improvements

• Session Mode and Thinking Level Persistence

  • New EntryModeChange and EntryAdditionalDirectories session entry types record mode switches and directory bindings to the session history, enabling full replay and cross-session consistency.
  • The SessionRuntime owns Model, Mode, ThinkingLevel, and AdditionalDirectories as session-scoped bindings, with ConfigureSession, ConfigSnapshot, SetConfigOption, and SetAdditionalDirectories methods for atomic read/write.
  • BuildAgent inherits session-level model, mode, and thinking level when the adapter omits overrides, ensuring consistent agent construction across ACP, TUI, and WebUI.

• ACP Strict JSON-RPC 2.0 Validation

  • The ACP server now enforces: initialize must be called before any other method, initialize may only be called once, empty messages are silently skipped, responses to notifications (empty ID) are suppressed, and request IDs are validated as JSON-RPC scalar types.
  • cancel requires a sessionId parameter and returns an error for unknown sessions.

• ACP Unique Run IDs Across Connections

  • Prompt run IDs now include a random suffix, preventing run ID collisions when ACP SDK request IDs repeat across connections.

• CI Release Notes from Changelog

  • GitHub release workflows now use docs/changelog_online_en.md as the release body instead of auto-generated release notes, ensuring releases carry the curated changelog.

• FileDiff Enriched with OldText/NewText

  • FileDiff now retains the complete file contents (OldText and NewText) for protocol projections that require a semantic diff rather than a display patch. OldText is nil when the write created a previously absent file.

• ContentBlock File Fields Extended

  • FileContent now carries Title, Description, and Size fields, and the ACP resource_link prompt type maps these fields into the provider-neutral file representation.

🐛 Fixes

• ACP Missing Prompt Body Rejection

  • Prompts with only empty text are now rejected with an empty prompt error instead of proceeding to the agent loop.

• ACP Flaky Test and CI Stability

  • Fixed wrapped thinking text assertion and flaky Go tests in CI.