feat: add basic MPP IDEA support #471

[phodal]

Summary by CodeRabbit

Release Notes

• New Features

  • Redesigned IDE plugin UI with agent-based architecture replacing legacy chat interface
  • Added code review integration with commit history and AI-assisted analysis
  • Introduced enhanced input handling with toolbar actions (@mention, settings, send/stop controls)
  • Added timeline-based chat with support for tool calls, errors, and task tracking
  • Implemented token counting and workspace indicators

• Bug Fixes

  • Improved document handling with proper read action wrapping
  • Fixed cross-platform file path handling
  • Resolved dependency conflicts in plugin build

• Documentation

  • Added IntelliJ IDEA plugin build and test documentation

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Caution

Review failed

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Walkthrough

This PR comprehensively refactors the mpp-idea IntelliJ plugin, replacing a basic Compose chat interface with a multi-agent system featuring tabbed agent types, timeline-based rendering, code review integration, and enhanced build configuration with dependency conflict verification.

Changes

Cohort / File(s)	Summary
Documentation AGENTS.md	Added section describing mpp-idea as a standalone Gradle project with includeBuild, including build, test, and compilation commands.
Core Logic core/src/main/kotlin/cc/unitmesh/devti/gui/chat/ui/AutoDevInput.kt	Changed document creation to use EditorFactory with ReadAction wrapping instead of file-based retrieval, removing null-document fallback.
Agent Tool Orchestration mpp-core/src/commonMain/kotlin/cc/unitmesh/agent/orchestrator/ToolOrchestrator.kt	Added specialized execution path for SubAgent tools with input validation via SubAgent.validateInput(params) before invocation.
Cross-Platform Path Handling mpp-core/src/commonMain/kotlin/cc/unitmesh/agent/subagent/DomainDictAgent.kt	Normalized Windows backslashes to forward slashes in path extraction; added guard to skip empty package paths during file ranking.
Build Configuration & Dependency Management mpp-idea/build.gradle.kts	Centralized version via mppVersion variable; introduced verifyNoDuplicateDependencies task to detect conflicting libraries; added extensive dependency exclusions for mpp-ui-jvm and mpp-core-jvm; added JUnit 5 test framework; wired verification task into build lifecycle.
Gradle Settings & Project Structure mpp-idea/settings.gradle.kts	Enabled typesafe project accessors; declared plugin management with explicit versions (Kotlin 2.1.20, IntelliJ Platform 2.10.2); added includeBuild with dependency substitution for local mpp-ui and mpp-core projects.
UI Component Layer mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/editor/IdeaBottomToolbar.kt, IdeaDevInInput.kt, IdeaInputListener.kt, IdeaInputSection.kt	Added new composable and stateful input components: IdeaBottomToolbar for action controls, IdeaDevInInput as a customizable editor field with document lifecycle management, IdeaInputListener interface for event handling, and IdeaInputSection composable combining input with toolbar.
Rendering State Management mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/renderer/JewelRenderer.kt	New comprehensive renderer managing timeline items (messages, tool calls, errors, task completions, terminal outputs), streaming output, execution state, token tracking, and task boundaries via StateFlow-backed observables.
Service Layer mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/services/CoroutineScopeHolder.kt	Refactored to accept Project parameter and implement Disposable; manages project-scoped CoroutineScope with parent SupervisorJob for proper lifecycle and child scope creation.
Removed Chat UI mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/AutoDevChatApp.kt, AutoDevChatViewModel.kt, AutoDevToolWindowFactory.kt	Deleted entire Compose chat UI module including state management, message handling, and tool window factory integration.
New Agent UI mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/IdeaAgentApp.kt, IdeaAgentToolWindowFactory.kt, IdeaAgentViewModel.kt	Introduced multi-agent UI with tabbed agent types (Coding, Code Review, Knowledge, Remote), integrated timeline rendering, tool loading status, and task execution; new factory and view model handling agent initialization and lifecycle.
Code Review Feature mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/codereview/IdeaCodeReviewContent.kt, IdeaCodeReviewModels.kt, IdeaCodeReviewViewModel.kt	New code review module with UI component for displaying commits, diffs, and AI analysis progress; data models for review state and analysis stages; view model coordinating Git operations and CodeReviewAgent execution.
Plugin Configuration mpp-idea/src/main/resources/META-INF/plugin.xml	Updated toolWindow declaration to use IdeaAgentToolWindowFactory with id "AutoDev Agent" (replaced AutoDevToolWindowFactory/"AutoDev Compose").
Test Coverage mpp-idea/src/test/kotlin/cc/unitmesh/devins/idea/renderer/JewelRendererTest.kt, IdeaAgentViewModelTest.kt	Added comprehensive tests for JewelRenderer state transitions and timeline management; placeholder test file for IdeaAgentViewModel (fully commented pending IntelliJ Platform setup).

Sequence Diagram

sequenceDiagram
    participant User
    participant IdeaInputSection as IdeaInputSection<br/>(UI)
    participant IdeaAgentVM as IdeaAgentViewModel<br/>(Orchestrator)
    participant KoogLLM as KoogLLMService<br/>(LLM)
    participant CodingAgent as CodingAgent<br/>(Agent)
    participant ToolOrch as ToolOrchestrator<br/>(Tool Exec)
    participant JewelRenderer as JewelRenderer<br/>(State)
    participant UI as IdeaAgentApp<br/>(Render)

    rect rgb(200, 230, 255)
        Note over User,UI: Task Submission Phase
        User->>IdeaInputSection: Enter task text + Send
        IdeaInputSection->>IdeaAgentVM: sendMessage(content) / executeTask()
    end

    rect rgb(200, 255, 220)
        Note over IdeaAgentVM,CodingAgent: Initialization Phase
        IdeaAgentVM->>IdeaAgentVM: initializeCodingAgent()
        IdeaAgentVM->>KoogLLM: Create LLM service
        IdeaAgentVM->>CodingAgent: Construct with renderer, LLM, tools
    end

    rect rgb(255, 240, 200)
        Note over CodingAgent,JewelRenderer: Execution & Rendering Phase
        CodingAgent->>JewelRenderer: addUserMessage(content)
        activate JewelRenderer
        JewelRenderer->>JewelRenderer: Update timeline + UI state
        deactivate JewelRenderer
        
        CodingAgent->>KoogLLM: Request LLM response (streaming)
        activate KoogLLM
        loop Streaming chunks
            KoogLLM-->>JewelRenderer: renderLLMResponseChunk(text)
            JewelRenderer->>JewelRenderer: Update currentStreamingOutput
            JewelRenderer-->>UI: State change (StateFlow)
            UI->>User: Live text updates
        end
        KoogLLM-->>JewelRenderer: renderLLMResponseEnd()
        deactivate KoogLLM
    end

    rect rgb(255, 220, 220)
        Note over CodingAgent,ToolOrch: Tool Execution Phase
        CodingAgent->>ToolOrch: execute(tool, params)
        alt SubAgent Tool
            ToolOrch->>ToolOrch: validateInput(params)
            ToolOrch->>ToolOrch: createInvocation(validated)
        else Other Tool
            ToolOrch->>ToolOrch: cast to ExecutableTool
            ToolOrch->>ToolOrch: createInvocation(params)
        end
        ToolOrch-->>ToolOrch: Execute & return result
        CodingAgent->>JewelRenderer: renderToolCall(toolName, params)
        JewelRenderer->>JewelRenderer: Add ToolCallItem to timeline
        CodingAgent->>JewelRenderer: renderToolResult(result)
        JewelRenderer->>JewelRenderer: Update last ToolCallItem / Add output
    end

    rect rgb(220, 240, 255)
        Note over CodingAgent,JewelRenderer: Completion Phase
        CodingAgent->>JewelRenderer: renderFinalResult() / renderTaskComplete()
        JewelRenderer->>JewelRenderer: Update taskCompleted flag
        JewelRenderer-->>UI: Final state via StateFlow
        UI->>User: Display final result + enable input
    end

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Estimated code review effort

🎯 5 (Critical) | ⏱️ ~120+ minutes

Areas requiring extra attention:

• mpp-idea/build.gradle.kts: Complex dependency management with extensive exclusion blocks; verify that verifyNoDuplicateDependencies task correctly identifies conflicts and doesn't introduce false positives or negatives.
• mpp-idea/settings.gradle.kts: Dependency substitution logic via includeBuild with project substitution mappings; ensure local project paths are resolved correctly and that remote fallbacks work as intended.
• JewelRenderer.kt: Large, stateful class managing timeline, task state, and streaming output; validate StateFlow updates are thread-safe and that state transitions (task-boundary detection, iteration tracking, token accounting) are correct.
• IdeaAgentViewModel.kt: Orchestrates task execution, agent initialization, LLM service integration, and coroutine lifecycle; verify cancelTask/abortRequest properly clean up resources and that config reloading doesn't cause race conditions.
• IdeaInputSection.kt & IdeaDevInInput.kt: Editor lifecycle, document recreation, and listener management; ensure no memory leaks from dangling listeners or editor references.
• UI Composition (IdeaAgentApp.kt, IdeaCodeReviewContent.kt): Large composables with complex state observation and rendering logic; validate LazyColumn/scroll-to-bottom behavior and that re-compositions don't cause unnecessary refreshes.
• Migration completeness: Verify that removal of AutoDevChatApp, AutoDevChatViewModel, and AutoDevToolWindowFactory didn't leave orphaned references or missed integration points elsewhere in the codebase.
• Gradle & Plugin Configuration (plugin.xml): Confirm plugin.xml toolWindow id change is reflected in all runtime references and that new test framework configuration doesn't break existing CI/CD pipelines.

Possibly related PRs

• Feat task tracking UI 959ce #466: Modifies ToolOrchestrator.kt to add AskAgent/task-boundary flow handling; both PRs extend tool execution logic in the same file with specialized routing for different tool types.
• feat(mpp-idea): add Compose UI module for IntelliJ IDEA 2025.2+ #470: Also refactors mpp-idea IntelliJ plugin with CoroutineScopeHolder, toolwindow factories, and chat/agent UI; this PR evolves or replaces UI patterns introduced in that PR.

Poem

🐰 With agent tabs now gleaming bright and new,
Our plugin dons a coat of multi-hued,
Timelines bloom where chats once sang,
Code reviews dance where Compose' bells rang—
The warren celebrates with timeline cheer! ✨

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between b7eeeae and ec45f40.

📒 Files selected for processing (24)

• AGENTS.md (1 hunks)
• core/src/main/kotlin/cc/unitmesh/devti/gui/chat/ui/AutoDevInput.kt (2 hunks)
• mpp-core/src/commonMain/kotlin/cc/unitmesh/agent/orchestrator/ToolOrchestrator.kt (1 hunks)
• mpp-core/src/commonMain/kotlin/cc/unitmesh/agent/subagent/DomainDictAgent.kt (2 hunks)
• mpp-idea/build.gradle.kts (4 hunks)
• mpp-idea/settings.gradle.kts (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/editor/IdeaBottomToolbar.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/editor/IdeaDevInInput.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/editor/IdeaInputListener.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/editor/IdeaInputSection.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/renderer/JewelRenderer.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/services/CoroutineScopeHolder.kt (2 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/AutoDevChatApp.kt (0 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/AutoDevChatViewModel.kt (0 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/AutoDevToolWindowFactory.kt (0 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/IdeaAgentApp.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/IdeaAgentToolWindowFactory.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/IdeaAgentViewModel.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/codereview/IdeaCodeReviewContent.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/codereview/IdeaCodeReviewModels.kt (1 hunks)
• mpp-idea/src/main/kotlin/cc/unitmesh/devins/idea/toolwindow/codereview/IdeaCodeReviewViewModel.kt (1 hunks)
• mpp-idea/src/main/resources/META-INF/plugin.xml (1 hunks)
• mpp-idea/src/test/kotlin/cc/unitmesh/devins/idea/renderer/JewelRendererTest.kt (1 hunks)
• mpp-idea/src/test/kotlin/cc/unitmesh/devins/idea/toolwindow/IdeaAgentViewModelTest.kt (1 hunks)

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