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Initial project structure and core crates#1

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souky-byte merged 1 commit into
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phase-1-4
Dec 30, 2025
Merged

Initial project structure and core crates#1
souky-byte merged 1 commit into
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phase-1-4

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@souky-byte souky-byte commented Dec 30, 2025

Add initial Rust workspace with core crates: core domain logic, database layer, event bus, orchestrator, VCS integration, websocket handler, and server with basic routes. Includes CI workflow, documentation, and initial dependencies. Sets up project foundation for further backend development.

Summary by CodeRabbit

Release Notes

  • New Features

    • Task lifecycle management with planning, implementation, and review phases
    • Real-time event streaming via WebSocket subscriptions
    • Workspace management supporting Git and Jujutsu VCS systems
    • AI-powered task orchestration with automated planning and code review
    • Comprehensive REST API for task, session, and workspace operations
  • Chores

    • Established modular architecture for improved scalability and maintainability
    • Added CI pipeline for automated testing and code quality validation

✏️ Tip: You can customize this high-level summary in your review settings.

Add initial Rust workspace with core crates: core domain logic, database layer, event bus, orchestrator, VCS integration, websocket handler, and server with basic routes. Includes CI workflow, documentation, and initial dependencies. Sets up project foundation for further backend development.
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coderabbitai Bot commented Dec 30, 2025

📝 Walkthrough

Walkthrough

This PR introduces a comprehensive Rust backend architecture for OpenCode Studio, establishing a multi-crate workspace with core domain models, database layer, OpenCode HTTP client integration, VCS abstraction (Git and Jujutsu), task orchestration with state machines, event streaming, WebSocket real-time updates, and a full REST API server with CI/CD workflow configuration.

Changes

Cohort / File(s) Summary
CI & Workflow
.github/workflows/ci.yml
New GitHub Actions workflow with three jobs: test, clippy, and fmt executing on push/PR to main/master, caching cargo artifacts, and enforcing code quality checks.
Workspace Configuration
Cargo.toml
Workspace manifest declaring members (crates/core, crates/db, etc.), shared dependency versions (tokio, axum, sqlx, reqwest, chrono, etc.), and profile settings.
Core Domain Models
crates/core/Cargo.toml, crates/core/src/lib.rs, crates/core/src/domain/mod.rs, crates/core/src/domain/session.rs, crates/core/src/domain/task.rs, crates/core/src/error.rs
Defines domain types for Task (with TaskStatus enum) and Session (with SessionPhase and SessionStatus enums), lifecycle methods, request/response DTOs, and CoreError variants (TaskNotFound, SessionNotFound, InvalidStatusTransition, Validation).
Database Layer
crates/db/Cargo.toml, crates/db/migrations/001_initial.sql, crates/db/src/lib.rs, crates/db/src/error.rs, crates/db/src/pool.rs, crates/db/src/models/mod.rs, crates/db/src/models/session.rs, crates/db/src/models/task.rs, crates/db/src/repositories/mod.rs, crates/db/src/repositories/session_repository.rs, crates/db/src/repositories/task_repository.rs
SQLite schema with tasks, sessions, and events tables; row mappers (SessionRow, TaskRow) for domain conversion; DbError handling; connection pooling with 30s timeout and WAL mode; CRUD repositories for sessions and tasks with filtering and status update operations.
Events System
crates/events/Cargo.toml, crates/events/src/lib.rs, crates/events/src/bus.rs, crates/events/src/types.rs
Event bus using tokio broadcast channels; EventEnvelope wrapper with auto-generated IDs; Event enum with task.created, task.updated, session.started, agent.message, workspace.* variants; AgentMessageData and ToolExecutionData payloads.
OpenCode Client
crates/opencode/Cargo.toml, crates/opencode/src/lib.rs, crates/opencode/src/client.rs, crates/opencode/src/error.rs, crates/opencode/src/events.rs, crates/opencode/src/types.rs
HTTP client for OpenCode API (session CRUD, messaging, async message support); SSE-based EventStream with reconnect logic; types for Session, Message, Part (Text variant); OpenCodeError variants (Request, Serialization, SessionNotFound, InvalidResponse, EventStream).
Task Orchestration
crates/orchestrator/Cargo.toml, crates/orchestrator/src/lib.rs, crates/orchestrator/src/error.rs, crates/orchestrator/src/executor.rs, crates/orchestrator/src/prompts.rs, crates/orchestrator/src/state_machine.rs
TaskExecutor orchestrating multi-phase execution (Planning → PlanningReview → InProgress → AiReview → Review → Done); PhasePrompts generating AI prompts with task metadata and diffs; TaskStateMachine validating transitions and computing next/previous states; ExecutorConfig for approval/review flags.
VCS Abstraction
crates/vcs/Cargo.toml, crates/vcs/src/error.rs, crates/vcs/src/lib.rs, crates/vcs/src/traits.rs, crates/vcs/src/git.rs, crates/vcs/src/jj.rs, crates/vcs/src/workspace.rs
VCS trait with async interface for workspace lifecycle (create, merge, cleanup), diff/status retrieval, and conflict detection; GitVcs (git worktree-based) and JujutsuVcs (bookmark-based) implementations; WorkspaceManager orchestrating setup, initialization scripts, file copying, and delegating to VCS; MergeResult and ConflictFile types.
WebSocket Handler
crates/websocket/Cargo.toml, crates/websocket/src/lib.rs, crates/websocket/src/handler.rs, crates/websocket/src/messages.rs
Axum-based WebSocket handler with heartbeat (30s), event subscription filtering by task_id; ClientMessage (Subscribe/Unsubscribe/Ping) and ServerMessage (Event/Subscribed/Pong/Error) enums with serde tagging; SubscriptionFilter with task ID matching logic.
HTTP Server
crates/server/Cargo.toml, crates/server/src/main.rs, crates/server/src/error.rs, crates/server/src/state.rs, crates/server/src/routes/mod.rs, crates/server/src/routes/health.rs, crates/server/src/routes/sessions.rs, crates/server/src/routes/tasks.rs, crates/server/src/routes/workspaces.rs, crates/server/src/routes/ws.rs
Axum HTTP server with centralized AppError mapping to status codes; AppState managing repositories, executors, and event bus; VCS backend detection (Git vs Jujutsu); REST endpoints for task CRUD, transitions, execution phases, session management, workspace operations (create/diff/merge/delete); WebSocket upgrade route; tracing integration; CORS support.
Documentation
agents.md, docs/architecture/backend-implementation-plan.md, product-prd.md
Comprehensive architectural guide (agents.md) detailing OpenCode Studio's two-layer architecture, state machines, crates organization, and API surface; backend implementation plan with phased roadmap; product PRD update describing HTTP Server API integration strategy with rationale, endpoints, and fallback approach.

Sequence Diagram(s)

sequenceDiagram
    participant Client as Client/API
    participant Server as Server
    participant Executor as TaskExecutor
    participant OpenCode as OpenCodeClient
    participant VCS as WorkspaceManager
    participant DB as Database
    participant EventBus as EventBus

    Client->>Server: execute_task(task_id)
    Server->>DB: load task by id
    DB-->>Server: Task
    Server->>Executor: execute_phase(task)
    
    rect rgb(220, 240, 220)
    Note over Executor,VCS: Planning Phase
    Executor->>OpenCode: create_session()
    OpenCode-->>Executor: session_id
    Executor->>VCS: create_workspace(task_id)
    VCS-->>Executor: Workspace
    Executor->>OpenCode: send_message(planning_prompt)
    OpenCode-->>Executor: MessageResponse
    Executor->>DB: create session, update task status
    end

    rect rgb(240, 220, 220)
    Note over Executor,OpenCode: Implementation Phase
    Executor->>OpenCode: send_message(implementation_prompt)
    OpenCode-->>Executor: MessageResponse
    Executor->>VCS: get_diff(workspace)
    VCS-->>Executor: diff
    Executor->>Executor: parse_review_response()
    end

    rect rgb(220, 220, 240)
    Note over Executor,VCS: Review & Merge
    alt Review Approved
        Executor->>VCS: merge_workspace(workspace)
        VCS-->>Executor: MergeResult::Success
        Executor->>DB: update task status to Done
    else Review Failed
        Executor->>Executor: run_fix_iteration(feedback)
    end
    end

    Executor->>EventBus: publish(TaskStatusChanged event)
    EventBus-->>Server: broadcast event
    Server-->>Client: json response + event via ws
Loading
sequenceDiagram
    participant WebClient as WebClient
    participant Server as Server
    participant WsHandler as WebSocket Handler
    participant EventBus as EventBus
    participant Repo as Database

    WebClient->>Server: GET /api/ws (upgrade)
    Server->>WsHandler: handle upgrade
    WsHandler->>EventBus: subscribe()
    EventBus-->>WsHandler: Receiver<EventEnvelope>

    WsHandler->>WebClient: ServerMessage::Subscribed
    
    par Background Event Loop
        loop Heartbeat (30s interval)
            WsHandler->>WebClient: ServerMessage::Pong
        end
    and Event Broadcasting
        rect rgb(200, 220, 255)
        Note over EventBus,WsHandler: Event Lifecycle
        Repo->>EventBus: publish(TaskStatusChanged)
        EventBus-->>WsHandler: broadcast event
        WsHandler->>WsHandler: filter.matches(event)?
        opt Task ID matches subscription
            WsHandler->>WebClient: ServerMessage::Event {envelope}
        end
        end
    and Client Messages
        WebClient->>WsHandler: ClientMessage::Subscribe
        WsHandler->>WsHandler: update filter
        WsHandler->>WebClient: ServerMessage::Subscribed
    end

    WebClient->>Server: close connection
    WsHandler->>EventBus: unsubscribe
Loading

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~60 minutes

Poem

🐰 From whiskers to bytes, a workspace so grand,
Tasks and sessions hop through domain-modeled land,
Git and Jujutsu dance with orchestrated grace,
While events broadcast through WebSocket space!
Rust backend magic—let the review commence!

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)
Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 30.26% which is insufficient. The required threshold is 80.00%. You can run @coderabbitai generate docstrings to improve docstring coverage.
✅ Passed checks (2 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title 'Initial project structure and core crates' accurately summarizes the main change: establishing a foundational Rust workspace with multiple domain crates (core, db, events, orchestrator, vcs, websocket, server) and supporting infrastructure.
✨ Finishing touches
  • 📝 Generate docstrings

Comment @coderabbitai help to get the list of available commands and usage tips.

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greptile-apps Bot commented Dec 30, 2025

Greptile Summary

This PR establishes the foundational architecture for opencode-os, a Rust-based backend system for AI-powered task orchestration with version control integration.

The implementation includes:

  • Core domain models for tasks and sessions with comprehensive status tracking (Todo → Planning → PlanningReview → InProgress → AiReview → Review → Done)
  • Database layer using SQLite with proper migrations, connection pooling (WAL mode), and repository pattern
  • Event-driven architecture with broadcast-based event bus for real-time updates
  • Task orchestration with state machine validation and OpenCode AI client integration
  • VCS integration using git worktrees for isolated workspace management per task
  • REST API server with Axum framework providing full CRUD operations for tasks, sessions, and workspaces
  • WebSocket support for real-time event streaming with subscription filtering
  • CI/CD pipeline with tests, clippy linting, and formatting checks

The codebase follows Rust best practices with proper error handling, comprehensive test coverage, and clean separation of concerns across 8 workspace crates. All components are well-structured with no critical issues found.

Confidence Score: 5/5

  • This PR is safe to merge with minimal risk
  • The initial project structure is well-architected with clean separation of concerns, comprehensive test coverage across all major components, proper error handling patterns, and follows Rust best practices. The code demonstrates thoughtful design decisions such as using git worktrees for workspace isolation, WAL mode for SQLite concurrency, and broadcast channels for event distribution. All crates compile cleanly with proper dependency management in the workspace.
  • No files require special attention

Important Files Changed

Filename Overview
Cargo.toml Clean workspace setup with proper dependency management
crates/core/src/domain/task.rs Well-structured task domain model with comprehensive status enum and tests
crates/db/migrations/001_initial.sql Database schema with proper foreign keys, cascades, and indexes
crates/db/src/pool.rs SQLite connection pool with WAL mode and proper configuration
crates/orchestrator/src/executor.rs Phase execution orchestration with AI review and iteration support
crates/vcs/src/git.rs Git worktree-based workspace management with merge conflict handling
crates/websocket/src/handler.rs WebSocket handler with heartbeat, subscription filtering, and event streaming
crates/server/src/main.rs Axum server with comprehensive REST API routes and middleware

Sequence Diagram

sequenceDiagram
    participant Client as REST Client
    participant Server as Axum Server
    participant TaskRepo as Task Repository
    participant EventBus as Event Bus
    participant WS as WebSocket Handler
    participant Executor as Task Executor
    participant OpenCode as OpenCode Client
    participant VCS as Git VCS
    participant DB as SQLite DB

    Client->>Server: POST /api/tasks
    Server->>TaskRepo: create(task)
    TaskRepo->>DB: INSERT INTO tasks
    DB-->>TaskRepo: task created
    Server->>EventBus: publish(TaskCreated)
    EventBus-->>WS: broadcast event
    WS-->>Client: TaskCreated event
    Server-->>Client: 201 Created

    Client->>Server: POST /api/tasks/{id}/execute
    Server->>Executor: execute_phase(task)
    
    alt Task Status: Todo → Planning
        Executor->>OpenCode: create_session("Planning")
        OpenCode-->>Executor: session_id
        Executor->>OpenCode: send_message(prompt)
        OpenCode-->>Executor: response
        Executor->>Executor: transition(PlanningReview)
    end

    alt Task Status: PlanningReview → InProgress
        Executor->>VCS: create_workspace(task_id)
        VCS->>VCS: git worktree add
        VCS-->>Executor: workspace
        Executor->>OpenCode: create_session("Implementation")
        OpenCode-->>Executor: session_id
        Executor->>OpenCode: send_message(prompt)
        Executor->>Executor: transition(AiReview)
    end

    alt Task Status: AiReview
        Executor->>VCS: get_diff(workspace)
        VCS-->>Executor: diff
        Executor->>OpenCode: create_session("Review")
        OpenCode->>OpenCode: send_message(review_prompt)
        OpenCode-->>Executor: review_response
        
        alt Review Approved
            Executor->>Executor: transition(Review)
        else Changes Requested
            Executor->>Executor: transition(InProgress)
        end
    end

    Executor-->>Server: PhaseResult
    Server->>TaskRepo: update(task)
    TaskRepo->>DB: UPDATE tasks
    Server->>EventBus: publish(StatusChanged)
    EventBus-->>WS: broadcast event
    Server-->>Client: ExecuteResponse

    Client->>Server: POST /api/workspaces/{id}/merge
    Server->>VCS: merge_workspace(workspace)
    VCS->>VCS: git merge --no-ff
    VCS-->>Server: MergeResult
    Server-->>Client: merge status
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59 files reviewed, 1 comment

Edit Code Review Agent Settings | Greptile

Comment thread crates/db/src/pool.rs
@souky-byte souky-byte merged commit b1dbe7b into master Dec 30, 2025
1 of 2 checks passed
@souky-byte souky-byte deleted the phase-1-4 branch December 30, 2025 13:22
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Actionable comments posted: 19

🧹 Nitpick comments (46)
crates/db/migrations/001_initial.sql (1)

15-27: Consider adding updated_at column to sessions table for consistency.

The tasks table has both created_at and updated_at, but sessions only has created_at. For tracking session lifecycle changes (e.g., when status transitions occur), an updated_at column would be useful.

🔎 Suggested addition
 CREATE TABLE IF NOT EXISTS sessions (
     id TEXT PRIMARY KEY,
     task_id TEXT NOT NULL REFERENCES tasks(id) ON DELETE CASCADE,
     opencode_session_id TEXT,
     phase TEXT NOT NULL,
     status TEXT NOT NULL DEFAULT 'pending',
     started_at INTEGER,
     completed_at INTEGER,
-    created_at INTEGER NOT NULL
+    created_at INTEGER NOT NULL,
+    updated_at INTEGER NOT NULL
 );
crates/db/src/pool.rs (1)

28-37: Test could be expanded to verify migrations run successfully.

The current test validates pool creation but doesn't test run_migrations. Consider adding a test that creates a pool, runs migrations, and verifies the schema exists.

🔎 Suggested enhancement
 #[tokio::test]
 async fn test_create_pool() {
     let pool = create_pool("sqlite::memory:").await;
     assert!(pool.is_ok());
 }
+
+#[tokio::test]
+async fn test_run_migrations() {
+    let pool = create_pool("sqlite::memory:").await.unwrap();
+    let result = run_migrations(&pool).await;
+    assert!(result.is_ok());
+    
+    // Verify tables exist
+    let row: (i32,) = sqlx::query_as("SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='tasks'")
+        .fetch_one(&pool)
+        .await
+        .unwrap();
+    assert_eq!(row.0, 1);
+}
docs/architecture/backend-implementation-plan.md (1)

36-45: Add language specifiers to code blocks for better rendering.

Several fenced code blocks lack language specifiers, which affects syntax highlighting. Per static analysis hints, consider adding language identifiers.

🔎 Example fix for directory structure block
-```
+```text
 crates/
 ├── core/           # Domain models, traits, events (NO I/O)
 ...
crates/orchestrator/src/prompts.rs (2)

31-51: Consider making plan path configurable.

The plan path is constructed twice - once in planning() (Line 15) and once in implementation() (Line 32). Consider extracting this to a constant or configuration to ensure consistency and ease future changes.

🔎 Suggested refactor
impl PhasePrompts {
    const PLANS_DIR: &'static str = ".opencode-studio/kanban/plans";
    const REVIEWS_DIR: &'static str = ".opencode-studio/kanban/reviews";
    
    fn plan_path(task_id: &uuid::Uuid) -> String {
        format!("{}/{}.md", Self::PLANS_DIR, task_id)
    }
    // ...
}

53-78: Review prompt embeds diff directly - consider size limits.

For large diffs, embedding the entire diff in the prompt could exceed context limits. Consider documenting expected diff size limits or implementing truncation with a reference to the full diff file.

product-prd.md (1)

646-662: Add language specifier to API endpoint code block.

Per static analysis, this code block should have a language specifier for proper rendering.

🔎 Suggested fix
-```
+```text
 # Sessions
 POST   /session                    # Vytvořit session
 ...
crates/opencode/src/events.rs (3)

27-38: Consider accepting a shared reqwest::Client.

Creating a new reqwest::Client per EventStream instance prevents connection pooling benefits. Consider accepting an optional client parameter.

🔎 Suggested enhancement
 impl EventStream {
-    pub fn new(base_url: impl Into<String>) -> Self {
+    pub fn new(base_url: impl Into<String>) -> Self {
+        Self::with_client(base_url, reqwest::Client::new())
+    }
+
+    pub fn with_client(base_url: impl Into<String>, client: reqwest::Client) -> Self {
         Self {
             base_url: base_url.into(),
-            client: reqwest::Client::new(),
+            client,
         }
     }

40-97: No automatic reconnection on stream failure.

The background task exits when an error occurs (Line 87-91), but there's no reconnection logic. For production use, consider implementing exponential backoff reconnection or documenting that callers must handle reconnection.


78-84: Parse errors are logged but not propagated.

When JSON parsing fails, the error is logged but the receiver isn't notified. This could cause silent data loss. Consider either propagating parse errors or documenting this behavior.

🔎 Alternative: propagate parse errors
                         Err(e) => {
-                            tracing::warn!(
-                                "Failed to parse event: {} - data: {}",
-                                e,
-                                event.data
-                            );
+                            tracing::warn!("Failed to parse event: {} - data: {}", e, event.data);
+                            // Optionally propagate to receiver:
+                            // let _ = tx.send(Err(OpenCodeError::Parse(e.to_string()))).await;
                         }
crates/db/Cargo.toml (1)

15-16: Clarify the redundant tokio dev-dependency.

The tokio dev-dependency duplicates the regular dependency without adding test-specific features. Typically, dev-dependencies include additional features like ["full", "test-util"] (as seen in crates/events/Cargo.toml). Consider either adding test features or removing this line if no additional features are needed for testing.

🔎 Suggested fix
 [dev-dependencies]
-tokio = { workspace = true }
+tokio = { workspace = true, features = ["test-util"] }

Or remove if not needed:

-[dev-dependencies]
-tokio = { workspace = true }
crates/vcs/Cargo.toml (1)

5-5: Consider workspace-wide rust-version consistency.

This manifest and orchestrator/Cargo.toml declare rust-version.workspace = true, but events/Cargo.toml and db/Cargo.toml don't. If all crates share the same MSRV requirement, consider adding this line to all manifests for consistency. If intentionally different, this is fine.

crates/server/src/routes/health.rs (1)

4-15: Consider using &'static str to avoid per-request allocations.

The current implementation allocates new Strings on every health check call. For a low-traffic endpoint this is fine, but you could use &'static str for zero-cost static values.

🔎 Suggested optimization
 #[derive(Serialize)]
 pub struct HealthResponse {
-    status: String,
-    version: String,
+    status: &'static str,
+    version: &'static str,
 }

 pub async fn health_check() -> Json<HealthResponse> {
     Json(HealthResponse {
-        status: "ok".to_string(),
-        version: env!("CARGO_PKG_VERSION").to_string(),
+        status: "ok",
+        version: env!("CARGO_PKG_VERSION"),
     })
 }
crates/core/src/error.rs (1)

19-29: Consider adding test coverage for other variants.

The test only covers TaskNotFound. Consider adding tests for InvalidStatusTransition and Validation to ensure their display formats are correct, especially since these will appear in logs and error responses.

crates/core/Cargo.toml (1)

1-5: Missing rust-version.workspace = true for consistency.

The opencode crate includes rust-version.workspace = true but this manifest does not. For consistency across workspace members, consider adding it.

🔎 Suggested fix
 [package]
 name = "opencode_core"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
crates/db/src/lib.rs (1)

1-8: Consider explicit re-exports instead of glob re-exports.

Glob re-exports (pub use X::*) can make the public API unclear and may cause name collisions as the crate grows. Consider explicit re-exports for better API discoverability:

🔎 Suggested approach
 mod error;
 pub mod models;
 mod pool;
 pub mod repositories;

-pub use error::*;
-pub use pool::*;
-pub use repositories::*;
+pub use error::{DbError, Result};
+pub use pool::{create_pool, run_migrations};
+pub use repositories::{SessionRepository, TaskRepository};

This makes the public API explicit and self-documenting. Adjust the specific items based on what you intend to expose.

crates/db/src/error.rs (1)

1-17: Consider adding a Result type alias for ergonomics.

A common pattern in Rust crates is to provide a type alias for Result using the crate's error type, reducing boilerplate in function signatures.

🔎 Suggested addition
 use thiserror::Error;
 use uuid::Uuid;

+/// A `Result` alias where the `Err` variant is [`DbError`].
+pub type Result<T> = std::result::Result<T, DbError>;
+
 #[derive(Error, Debug)]
 pub enum DbError {
agents.md (1)

19-19: Consider adding language identifiers to code blocks.

Several fenced code blocks lack language identifiers, which helps with syntax highlighting and clarity. Consider adding appropriate identifiers (e.g., text, mermaid, or language-specific identifiers).

Also applies to: 31-31, 60-60, 92-92, 297-297

crates/websocket/Cargo.toml (1)

15-15: Consider workspace-managing futures-util for consistency.

The futures-util dependency is explicitly versioned as "0.3" while most other dependencies use workspace = true. For better version consistency across the workspace, consider adding futures-util to the workspace dependencies in the root Cargo.toml.

🔎 Proposed changes

In root Cargo.toml, add to [workspace.dependencies]:

futures-util = "0.3"

Then in this file:

-futures-util = "0.3"
+futures-util = { workspace = true }
crates/opencode/src/lib.rs (1)

1-9: Consider explicit re-exports instead of glob for types.

Using pub use types::* exposes all public items from the types module, which can inadvertently expand the public API surface and make breaking changes harder to track. Per best practices, prefer explicit re-exports for better API control.

🔎 Proposed fix
-pub use types::*;
+pub use types::{Session, SessionListResponse, /* other specific types */};
crates/server/src/routes/sessions.rs (1)

10-13: Consider adding pagination for list endpoints.

list_sessions returns all sessions without pagination, which could cause performance issues and large response payloads as data grows. Consider adding limit/offset or cursor-based pagination.

🔎 Example with pagination parameters
+use axum::extract::Query;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct PaginationParams {
+    pub limit: Option<i64>,
+    pub offset: Option<i64>,
+}
+
 pub async fn list_sessions(
     State(state): State<AppState>,
+    Query(params): Query<PaginationParams>,
 ) -> Result<Json<Vec<Session>>, AppError> {
-    let sessions = state.session_repository.find_all().await?;
+    let limit = params.limit.unwrap_or(100);
+    let offset = params.offset.unwrap_or(0);
+    let sessions = state.session_repository.find_all_paginated(limit, offset).await?;
     Ok(Json(sessions))
 }
crates/orchestrator/src/state_machine.rs (2)

21-31: Consider using static slices to avoid allocation.

allowed_transitions allocates a new Vec on every call. Using static slices would eliminate this allocation overhead.

🔎 Proposed optimization
-    fn allowed_transitions(from: &TaskStatus) -> Vec<TaskStatus> {
+    fn allowed_transitions(from: &TaskStatus) -> &'static [TaskStatus] {
         match from {
-            TaskStatus::Todo => vec![TaskStatus::Planning],
-            TaskStatus::Planning => vec![TaskStatus::PlanningReview, TaskStatus::Todo],
-            TaskStatus::PlanningReview => vec![TaskStatus::InProgress, TaskStatus::Planning],
-            TaskStatus::InProgress => vec![TaskStatus::AiReview, TaskStatus::PlanningReview],
-            TaskStatus::AiReview => vec![TaskStatus::Review, TaskStatus::InProgress],
-            TaskStatus::Review => vec![TaskStatus::Done, TaskStatus::InProgress],
-            TaskStatus::Done => vec![],
+            TaskStatus::Todo => &[TaskStatus::Planning],
+            TaskStatus::Planning => &[TaskStatus::PlanningReview, TaskStatus::Todo],
+            TaskStatus::PlanningReview => &[TaskStatus::InProgress, TaskStatus::Planning],
+            TaskStatus::InProgress => &[TaskStatus::AiReview, TaskStatus::PlanningReview],
+            TaskStatus::AiReview => &[TaskStatus::Review, TaskStatus::InProgress],
+            TaskStatus::Review => &[TaskStatus::Done, TaskStatus::InProgress],
+            TaskStatus::Done => &[],
         }
     }

62-118: Good test coverage for state transitions.

Tests cover forward transitions, invalid transitions, backward transitions, and the next_status helper. Consider adding a test for previous_status behavior as well.

🔎 Additional test suggestion
#[test]
fn test_previous_status() {
    assert_eq!(TaskStateMachine::previous_status(&TaskStatus::Todo), None);
    assert_eq!(
        TaskStateMachine::previous_status(&TaskStatus::Planning),
        Some(TaskStatus::Todo)
    );
    assert_eq!(
        TaskStateMachine::previous_status(&TaskStatus::Done),
        Some(TaskStatus::Review)
    );
}
crates/events/src/bus.rs (1)

9-10: Document broadcast channel overflow behavior.

When the channel is at capacity, slow subscribers will start losing messages (lagging). Consider documenting this behavior and potentially exposing a way to detect lagging receivers.

🔎 Documentation suggestion
 /// Capacity for the broadcast channel
+/// Note: When the channel is full, the oldest messages are dropped for slow subscribers.
+/// Subscribers that fall behind will receive a `RecvError::Lagged` error.
 const DEFAULT_CAPACITY: usize = 1000;
crates/db/src/repositories/task_repository.rs (2)

18-39: Consider returning the persisted row instead of the input clone.

create returns task.clone(), which won't reflect any DB-generated defaults or triggers. This is acceptable if the domain guarantees all fields are set before insertion, but returning the fetched row would be more defensive.

🔎 Optional: fetch after insert to confirm persistence
         .execute(&self.pool)
         .await?;
 
-        Ok(task.clone())
+        self.find_by_id(task.id).await?.ok_or(DbError::TaskNotFound(task.id))

70-113: Read-modify-write without a transaction creates a TOCTOU window.

The update method performs find_by_id then a separate UPDATE. Under concurrent updates, one writer's changes can be silently overwritten. For an initial foundation this may be acceptable, but consider wrapping in a transaction or using a single conditional UPDATE statement if concurrent task updates are expected.

🔎 Example: use a transaction
     pub async fn update(
         &self,
         id: Uuid,
         update: &UpdateTaskRequest,
     ) -> Result<Option<Task>, DbError> {
+        let mut tx = self.pool.begin().await?;
-        let existing = self.find_by_id(id).await?;
+        let row: Option<TaskRow> = sqlx::query_as(
+            "SELECT * FROM tasks WHERE id = ? FOR UPDATE"
+        )
+        .bind(id.to_string())
+        .fetch_optional(&mut *tx)
+        .await?;
+        let existing = row.map(|r| r.into_domain());
         let Some(mut task) = existing else {
             return Ok(None);
         };
         // ... apply updates ...
-        .execute(&self.pool)
+        .execute(&mut *tx)
         .await?;
+        tx.commit().await?;
         Ok(Some(task))
     }
crates/server/Cargo.toml (1)

26-28: Redundant tokio in dev-dependencies.

tokio is already declared in [dependencies] at line 15. The dev-dependency entry is unnecessary and can be removed.

🔎 Proposed fix
 [dev-dependencies]
-tokio = { workspace = true }
 axum-test = "16"
crates/db/src/models/session.rs (1)

17-30: Silent fallback to nil UUID on parse failure may mask data corruption.

Using unwrap_or_default() for UUID parsing (lines 20-21) silently converts invalid/corrupted IDs to Uuid::nil(). This could make debugging difficult. Consider logging a warning or returning a Result to surface issues early.

🔎 Example: log on fallback
         Session {
-            id: Uuid::parse_str(&self.id).unwrap_or_default(),
-            task_id: Uuid::parse_str(&self.task_id).unwrap_or_default(),
+            id: Uuid::parse_str(&self.id).unwrap_or_else(|e| {
+                tracing::warn!("Invalid session id '{}': {}", self.id, e);
+                Uuid::nil()
+            }),
+            task_id: Uuid::parse_str(&self.task_id).unwrap_or_else(|e| {
+                tracing::warn!("Invalid task_id '{}': {}", self.task_id, e);
+                Uuid::nil()
+            }),
crates/opencode/src/client.rs (2)

14-20: Consider configuring timeouts on the HTTP client.

Client::new() uses default settings with no timeout. External service calls can hang indefinitely if the OpenCode service is unresponsive, potentially exhausting server resources.

🔎 Proposed fix
+use std::time::Duration;
+
 impl OpenCodeClient {
     pub fn new(base_url: impl Into<String>) -> Self {
+        let client = Client::builder()
+            .timeout(Duration::from_secs(30))
+            .connect_timeout(Duration::from_secs(10))
+            .build()
+            .expect("Failed to build HTTP client");
         Self {
             base_url: base_url.into(),
-            client: Client::new(),
+            client,
         }
     }

100-110: Duplicate error handling in send_message_async and abort_session.

Both methods have identical error handling blocks. Consider extracting to a helper or reusing handle_response with a unit return type.

🔎 Example: use handle_response for unit responses
     pub async fn send_message_async(&self, session_id: &str, prompt: &str) -> Result<()> {
         let request = SendMessageRequest::new(prompt);
         let response = self
             .client
             .post(format!("{}/session/{}/prompt_async", self.base_url, session_id))
             .json(&request)
             .send()
             .await?;
 
-        if !response.status().is_success() {
-            let status = response.status();
-            let body = response.text().await.unwrap_or_default();
-            return Err(OpenCodeError::InvalidResponse(format!(
-                "Status {}: {}",
-                status, body
-            )));
-        }
-
-        Ok(())
+        self.handle_empty_response(response).await
     }
+
+    async fn handle_empty_response(&self, response: reqwest::Response) -> Result<()> {
+        let status = response.status();
+        if status == reqwest::StatusCode::NOT_FOUND {
+            return Err(OpenCodeError::SessionNotFound("Resource not found".to_string()));
+        }
+        if !status.is_success() {
+            let body = response.text().await.unwrap_or_default();
+            return Err(OpenCodeError::InvalidResponse(format!("Status {}: {}", status, body)));
+        }
+        Ok(())
+    }

Also applies to: 119-129

crates/server/src/state.rs (1)

23-27: Edge case: root path produces ../.workspaces.

If current_dir() returns / or fails, repo_path.parent() returns None and workspace_base becomes ../.workspaces, which may not be a valid path. Consider using an absolute fallback or documenting this assumption.

🔎 More robust fallback
         let workspace_base = repo_path
             .parent()
             .map(|p| p.join(".workspaces"))
-            .unwrap_or_else(|| PathBuf::from("../.workspaces"));
+            .unwrap_or_else(|| repo_path.join(".workspaces"));
crates/events/src/types.rs (1)

101-123: Consider using an enum for role field.

The role field is typed as String, but based on the comment it has a known set of values ("assistant", "user", "system"). Consider using an enum for compile-time safety.

This is optional for the initial implementation but worth considering as the codebase matures.

🔎 Optional enum-based approach
#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum MessageRole {
    Assistant,
    User,
    System,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AgentMessageData {
    pub content: String,
    pub role: MessageRole,
    pub is_partial: bool,
}
crates/core/src/domain/task.rs (1)

5-43: Consider implementing FromStr trait for idiomatic parsing.

The manual as_str() and parse() methods work but could drift out of sync with serde's rename_all. Consider implementing the standard FromStr trait for more idiomatic Rust, or using strum crate for automatic string conversions.

For the initial implementation, this is acceptable but worth noting for future consistency.

🔎 Alternative using FromStr trait
use std::str::FromStr;

impl FromStr for TaskStatus {
    type Err = ();
    
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "todo" => Ok(Self::Todo),
            "planning" => Ok(Self::Planning),
            "planning_review" => Ok(Self::PlanningReview),
            "in_progress" => Ok(Self::InProgress),
            "ai_review" => Ok(Self::AiReview),
            "review" => Ok(Self::Review),
            "done" => Ok(Self::Done),
            _ => Err(()),
        }
    }
}

impl std::fmt::Display for TaskStatus {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.as_str())
    }
}
crates/core/src/domain/session.rs (1)

67-113: Consider adding state transition validation.

The lifecycle methods (start, complete, fail, abort) currently allow any state transition without validation. For example, calling complete() on an already Failed session is permitted. Consider returning Result to enforce valid state machines.

This is acceptable for the initial implementation, but could lead to subtle bugs if callers don't check state before transitioning.

🔎 Example with validation
impl Session {
    pub fn start(&mut self, opencode_session_id: String) -> Result<(), &'static str> {
        if self.status != SessionStatus::Pending {
            return Err("Session can only be started from Pending state");
        }
        self.opencode_session_id = Some(opencode_session_id);
        self.status = SessionStatus::Running;
        self.started_at = Some(Utc::now());
        Ok(())
    }
    
    pub fn complete(&mut self) -> Result<(), &'static str> {
        if self.status != SessionStatus::Running {
            return Err("Session can only be completed from Running state");
        }
        self.status = SessionStatus::Completed;
        self.completed_at = Some(Utc::now());
        Ok(())
    }
    // ... similar for fail() and abort()
}
crates/server/src/routes/workspaces.rs (2)

20-30: Status serialization uses Debug format.

Line 26 uses format!("{:?}", ws.status).to_lowercase() which relies on Debug formatting. This is fragile—if WorkspaceStatus changes its Debug impl or adds variants with complex names, the API response changes unexpectedly. Prefer using a dedicated method like as_str() or serde serialization.

🔎 Suggested fix

In crates/vcs/src/traits.rs, add an as_str method to WorkspaceStatus:

impl WorkspaceStatus {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Active => "active",
            Self::Merged => "merged",
            Self::Abandoned => "abandoned",
        }
    }
}

Then in this file:

 impl From<Workspace> for WorkspaceResponse {
     fn from(ws: Workspace) -> Self {
         Self {
             task_id: ws.task_id,
             path: ws.path.display().to_string(),
             branch_name: ws.branch_name,
-            status: format!("{:?}", ws.status).to_lowercase(),
+            status: ws.status.as_str().to_string(),
             created_at: ws.created_at.to_rfc3339(),
         }
     }
 }

63-99: Repeated list-then-find pattern is inefficient.

Both get_workspace_diff and get_workspace_status call list_workspaces() and iterate to find by task_id. This pattern repeats in merge_workspace and delete_workspace too (Lines 127-164). Consider adding a get_workspace_by_task_id method to WorkspaceManager to avoid loading all workspaces for single lookups.

For the initial implementation this is acceptable, but will become a performance concern as workspace count grows.

🔎 Suggested helper method

Add to WorkspaceManager:

pub async fn get_workspace(&self, task_id: &str) -> Result<Option<Workspace>> {
    let workspaces = self.list_workspaces().await?;
    Ok(workspaces.into_iter().find(|ws| ws.task_id == task_id))
}

Then simplify handlers:

pub async fn get_workspace_diff(
    State(state): State<AppState>,
    Path(task_id): Path<String>,
) -> Result<Json<DiffResponse>, AppError> {
    let workspace = state
        .workspace_manager
        .get_workspace(&task_id)
        .await?
        .ok_or_else(|| AppError::NotFound(format!("Workspace not found: {}", task_id)))?;

    let diff = state.workspace_manager.get_diff(&workspace).await?;
    Ok(Json(DiffResponse { task_id: workspace.task_id, diff }))
}
crates/db/src/repositories/session_repository.rs (1)

103-116: Hardcoded status strings may drift from enum.

The query uses hardcoded strings 'pending', 'running' which must stay in sync with SessionStatus::as_str(). Consider using constants or the enum's as_str() method to generate the query.

This is low-risk for initial implementation but worth addressing as the codebase grows.

🔎 Alternative approach
pub async fn find_active(&self) -> Result<Vec<Session>, DbError> {
    let pending = SessionStatus::Pending.as_str();
    let running = SessionStatus::Running.as_str();
    
    let rows: Vec<SessionRow> = sqlx::query_as(&format!(
        r#"
        SELECT id, task_id, opencode_session_id, phase, status, started_at, completed_at, created_at
        FROM sessions
        WHERE status IN (?, ?)
        ORDER BY created_at DESC
        "#
    ))
    .bind(pending)
    .bind(running)
    .fetch_all(&self.pool)
    .await?;

    Ok(rows.into_iter().map(|r| r.into_domain()).collect())
}
crates/server/src/routes/tasks.rs (1)

77-123: Event status format uses Debug representation.

Lines 115-116 use format!("{:?}", previous_status) and format!("{:?}", task.status) which produces "Todo" style strings, while TaskStatus::as_str() produces "todo" snake_case strings. This inconsistency could confuse event consumers.

🔎 Suggested fix
     state
         .event_bus
         .publish(EventEnvelope::new(Event::TaskStatusChanged {
             task_id: id,
-            from_status: format!("{:?}", previous_status),
-            to_status: format!("{:?}", task.status),
+            from_status: previous_status.as_str().to_string(),
+            to_status: task.status.as_str().to_string(),
         }));
crates/vcs/src/git.rs (5)

29-48: Consider using &Path instead of &PathBuf for the cwd parameter.

The idiomatic Rust approach is to accept &Path for read-only path references. PathBuf dereferences to Path, so callers can still pass &PathBuf, but this makes the signature more general.

Additionally, consider adding a timeout to prevent indefinite hangs if the git process stalls (e.g., network issues during push/fetch).

🔎 Suggested signature change
-    async fn run_git(&self, args: &[&str], cwd: &PathBuf) -> Result<String> {
+    async fn run_git(&self, args: &[&str], cwd: &Path) -> Result<String> {

Add at the top:

use std::path::Path;

63-76: Silently swallowing errors may hide underlying issues.

Returning an empty vector on error (line 75) masks potential problems like permission errors or corrupted git state. Consider logging the error before returning the empty vector.

-            Err(_) => Ok(Vec::new()),
+            Err(e) => {
+                warn!("Failed to get repo conflicts: {}", e);
+                Ok(Vec::new())
+            }

168-181: Duplicated merge abort logic can be consolidated.

Both branches (lines 174 and 177) call merge --abort. This is correct behavior, but the duplication can be simplified.

Additionally, consider that the checkout to main_branch (line 158) leaves the main repo in a potentially unexpected state if the merge fails and the caller doesn't handle it properly.

🔎 Simplified abort logic
         match merge_result {
             Ok(_) => Ok(MergeResult::Success),
             Err(e) => {
                 warn!("Merge failed: {}", e);
+                let _ = self.run_git(&["merge", "--abort"], &self.repo_path).await;
                 let conflicts = self.get_repo_conflicts().await?;
                 if conflicts.is_empty() {
-                    let _ = self.run_git(&["merge", "--abort"], &self.repo_path).await;
                     Err(e)
                 } else {
-                    let _ = self.run_git(&["merge", "--abort"], &self.repo_path).await;
                     Ok(MergeResult::Conflicts { files: conflicts })
                 }
             }
         }

184-206: Consider logging cleanup failures instead of silently ignoring.

While silently ignoring cleanup failures is reasonable for best-effort cleanup, logging warnings would help diagnose issues when workspaces aren't cleaned up properly.

Also, unwrap_or("") on line 191 could cause git to fail silently with a confusing error if the path is invalid.

🔎 Suggested improvement
     async fn cleanup_workspace(&self, workspace: &Workspace) -> Result<()> {
-        let _ = self
+        if let Err(e) = self
             .run_git(
                 &[
                     "worktree",
                     "remove",
                     "--force",
-                    workspace.path.to_str().unwrap_or(""),
+                    workspace.path.to_str()
+                        .ok_or_else(|| VcsError::InvalidPath(workspace.path.display().to_string()))?,
                 ],
                 &self.repo_path,
             )
-            .await;
+            .await
+        {
+            warn!("Failed to remove worktree: {}", e);
+        }

-        let _ = self
+        if let Err(e) = self
             .run_git(&["branch", "-D", &workspace.branch_name], &self.repo_path)
-            .await;
+            .await
+        {
+            warn!("Failed to delete branch: {}", e);
+        }

242-265: Code duplication with get_repo_conflicts.

This method shares nearly identical logic with get_repo_conflicts (lines 58-77). Consider extracting a shared helper to reduce duplication.

🔎 Suggested refactor
async fn detect_conflicts(&self, cwd: &Path) -> Result<Vec<ConflictFile>> {
    let output = self
        .run_git(&["diff", "--name-only", "--diff-filter=U"], cwd)
        .await;

    match output {
        Ok(text) => {
            let conflicts: Vec<ConflictFile> = text
                .lines()
                .filter(|line| !line.is_empty())
                .map(|path| ConflictFile {
                    path: PathBuf::from(path),
                    conflict_type: ConflictType::Content,
                })
                .collect();
            Ok(conflicts)
        }
        Err(e) => {
            warn!("Failed to detect conflicts: {}", e);
            Ok(Vec::new())
        }
    }
}

Then use self.detect_conflicts(&self.repo_path) and self.detect_conflicts(&workspace.path).

crates/vcs/src/jj.rs (2)

22-41: Same refactoring opportunity as run_git.

Consider using &Path instead of &PathBuf for the cwd parameter for idiomatic Rust.


199-215: Same error-handling concern as GitVcs.

Consider logging errors before returning an empty vector (line 214) to aid debugging.

crates/orchestrator/src/executor.rs (2)

51-55: Consider idempotency for resumed executions.

If run_planning_session fails after creating a session but before transitioning (e.g., network error on send_message), retrying execute_phase while in Planning state would create a duplicate session. Consider storing session IDs in the task to enable resumption.


142-148: Placeholder implementation needs VCS integration.

This method returns placeholder strings instead of actual diffs, making the AI review ineffective. This should integrate with the VersionControl::get_diff method from the VCS crate.

Would you like me to help design the integration, or should I open an issue to track this?

🔎 Expected integration pattern
// TaskExecutor would need access to VCS
pub struct TaskExecutor {
    opencode: Arc<OpenCodeClient>,
    vcs: Arc<dyn VersionControl>,  // Add this
    config: ExecutorConfig,
}

async fn get_workspace_diff(&self, task: &Task) -> Result<String> {
    if let Some(ref workspace_path) = task.workspace_path {
        // Create or retrieve workspace from task
        let workspace = self.get_or_create_workspace(task).await?;
        self.vcs.get_diff(&workspace).await
            .map_err(|e| /* convert VcsError to OrchestratorError */)
    } else {
        Ok(String::new())
    }
}
📜 Review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between cf75e39 and e08839e.

⛔ Files ignored due to path filters (2)
  • Cargo.lock is excluded by !**/*.lock
  • studio.db is excluded by !**/*.db
📒 Files selected for processing (61)
  • .github/workflows/ci.yml
  • Cargo.toml
  • agents.md
  • crates/core/Cargo.toml
  • crates/core/src/domain/mod.rs
  • crates/core/src/domain/session.rs
  • crates/core/src/domain/task.rs
  • crates/core/src/error.rs
  • crates/core/src/lib.rs
  • crates/db/Cargo.toml
  • crates/db/migrations/001_initial.sql
  • crates/db/src/error.rs
  • crates/db/src/lib.rs
  • crates/db/src/models/mod.rs
  • crates/db/src/models/session.rs
  • crates/db/src/models/task.rs
  • crates/db/src/pool.rs
  • crates/db/src/repositories/mod.rs
  • crates/db/src/repositories/session_repository.rs
  • crates/db/src/repositories/task_repository.rs
  • crates/events/Cargo.toml
  • crates/events/src/bus.rs
  • crates/events/src/lib.rs
  • crates/events/src/types.rs
  • crates/opencode/Cargo.toml
  • crates/opencode/src/client.rs
  • crates/opencode/src/error.rs
  • crates/opencode/src/events.rs
  • crates/opencode/src/lib.rs
  • crates/opencode/src/types.rs
  • crates/orchestrator/Cargo.toml
  • crates/orchestrator/src/error.rs
  • crates/orchestrator/src/executor.rs
  • crates/orchestrator/src/lib.rs
  • crates/orchestrator/src/prompts.rs
  • crates/orchestrator/src/state_machine.rs
  • crates/server/Cargo.toml
  • crates/server/src/error.rs
  • crates/server/src/main.rs
  • crates/server/src/routes/health.rs
  • crates/server/src/routes/mod.rs
  • crates/server/src/routes/sessions.rs
  • crates/server/src/routes/tasks.rs
  • crates/server/src/routes/workspaces.rs
  • crates/server/src/routes/ws.rs
  • crates/server/src/state.rs
  • crates/vcs/Cargo.toml
  • crates/vcs/src/error.rs
  • crates/vcs/src/git.rs
  • crates/vcs/src/jj.rs
  • crates/vcs/src/lib.rs
  • crates/vcs/src/traits.rs
  • crates/vcs/src/workspace.rs
  • crates/websocket/Cargo.toml
  • crates/websocket/src/handler.rs
  • crates/websocket/src/lib.rs
  • crates/websocket/src/messages.rs
  • docs/architecture/backend-implementation-plan.md
  • product-prd.md
  • studio.db-shm
  • studio.db-wal
🧰 Additional context used
🧬 Code graph analysis (22)
crates/websocket/src/lib.rs (1)
crates/websocket/src/handler.rs (1)
  • ws_handler (29-34)
crates/db/src/pool.rs (3)
crates/db/src/repositories/session_repository.rs (1)
  • new (13-15)
crates/db/src/repositories/task_repository.rs (1)
  • new (14-16)
crates/server/src/state.rs (1)
  • new (20-40)
crates/server/src/routes/ws.rs (2)
crates/server/src/state.rs (1)
  • new (20-40)
crates/websocket/src/handler.rs (1)
  • ws_handler (29-34)
crates/orchestrator/src/error.rs (1)
crates/server/src/error.rs (2)
  • from (85-87)
  • from (91-93)
crates/db/src/error.rs (1)
crates/server/src/error.rs (2)
  • from (85-87)
  • from (91-93)
crates/websocket/src/messages.rs (1)
crates/events/src/types.rs (2)
  • task_id (127-141)
  • new (20-26)
crates/db/src/models/task.rs (2)
crates/db/src/models/session.rs (3)
  • into_domain (18-29)
  • timestamp_to_datetime (47-49)
  • datetime_to_timestamp (51-53)
crates/core/src/domain/task.rs (1)
  • parse (31-42)
crates/server/src/routes/sessions.rs (1)
crates/opencode/src/client.rs (2)
  • list_sessions (55-64)
  • get_session (45-53)
crates/opencode/src/error.rs (6)
crates/db/src/models/session.rs (1)
  • from (33-44)
crates/db/src/models/task.rs (1)
  • from (33-44)
crates/server/src/error.rs (2)
  • from (85-87)
  • from (91-93)
crates/server/src/routes/tasks.rs (1)
  • from (142-150)
crates/server/src/routes/workspaces.rs (2)
  • from (21-29)
  • from (114-124)
crates/opencode/src/events.rs (1)
  • serde_json (72-72)
crates/websocket/src/handler.rs (3)
crates/events/src/bus.rs (2)
  • new (22-24)
  • subscriber_count (53-55)
crates/server/src/state.rs (1)
  • new (20-40)
crates/websocket/src/messages.rs (1)
  • matches (42-53)
crates/vcs/src/workspace.rs (5)
crates/server/src/error.rs (2)
  • from (85-87)
  • from (91-93)
crates/server/src/state.rs (1)
  • new (20-40)
crates/vcs/src/git.rs (8)
  • new (16-22)
  • cleanup_workspace (184-206)
  • get_diff (126-135)
  • get_status (137-144)
  • merge_workspace (146-182)
  • list_workspaces (208-240)
  • commit (267-281)
  • push (283-295)
crates/vcs/src/jj.rs (8)
  • new (15-20)
  • cleanup_workspace (157-169)
  • get_diff (108-114)
  • get_status (116-122)
  • merge_workspace (124-155)
  • list_workspaces (171-190)
  • commit (218-234)
  • push (236-268)
crates/vcs/src/traits.rs (8)
  • new (19-27)
  • cleanup_workspace (103-103)
  • get_diff (94-94)
  • get_status (97-97)
  • merge_workspace (100-100)
  • list_workspaces (106-106)
  • commit (112-112)
  • push (115-115)
crates/core/src/domain/session.rs (3)
crates/db/src/repositories/session_repository.rs (1)
  • new (13-15)
crates/db/src/repositories/task_repository.rs (1)
  • new (14-16)
crates/server/src/state.rs (1)
  • new (20-40)
crates/opencode/src/types.rs (7)
crates/core/src/domain/session.rs (1)
  • new (80-91)
crates/core/src/domain/task.rs (1)
  • new (58-70)
crates/db/src/repositories/session_repository.rs (1)
  • new (13-15)
crates/db/src/repositories/task_repository.rs (1)
  • new (14-16)
crates/opencode/src/client.rs (1)
  • new (15-20)
crates/opencode/src/events.rs (1)
  • new (33-38)
crates/server/src/state.rs (1)
  • new (20-40)
crates/server/src/state.rs (8)
crates/db/src/repositories/session_repository.rs (1)
  • new (13-15)
crates/db/src/repositories/task_repository.rs (1)
  • new (14-16)
crates/events/src/bus.rs (1)
  • new (22-24)
crates/opencode/src/client.rs (1)
  • new (15-20)
crates/orchestrator/src/executor.rs (1)
  • new (31-36)
crates/vcs/src/git.rs (1)
  • new (16-22)
crates/vcs/src/jj.rs (1)
  • new (15-20)
crates/vcs/src/workspace.rs (2)
  • new (35-40)
  • new (60-66)
crates/server/src/routes/tasks.rs (3)
crates/core/src/domain/task.rs (1)
  • new (58-70)
crates/db/src/repositories/task_repository.rs (2)
  • new (14-16)
  • update (70-113)
crates/server/src/state.rs (1)
  • new (20-40)
crates/vcs/src/jj.rs (2)
crates/vcs/src/traits.rs (14)
  • new (19-27)
  • name (82-82)
  • is_available (85-85)
  • is_initialized (88-88)
  • create_workspace (91-91)
  • get_diff (94-94)
  • get_status (97-97)
  • merge_workspace (100-100)
  • conflicts (52-57)
  • cleanup_workspace (103-103)
  • list_workspaces (106-106)
  • get_conflicts (109-109)
  • commit (112-112)
  • push (115-115)
crates/vcs/src/workspace.rs (9)
  • new (35-40)
  • new (60-66)
  • get_diff (190-192)
  • get_status (194-196)
  • merge_workspace (198-204)
  • cleanup_workspace (149-188)
  • list_workspaces (206-208)
  • commit (210-212)
  • push (214-216)
crates/events/src/types.rs (3)
crates/events/src/bus.rs (1)
  • new (22-24)
crates/server/src/state.rs (1)
  • new (20-40)
crates/websocket/src/handler.rs (1)
  • new (24-26)
crates/events/src/bus.rs (3)
crates/events/src/types.rs (1)
  • new (20-26)
crates/server/src/state.rs (1)
  • new (20-40)
crates/websocket/src/handler.rs (1)
  • new (24-26)
crates/opencode/src/client.rs (2)
crates/opencode/src/types.rs (1)
  • new (40-45)
crates/server/src/state.rs (1)
  • new (20-40)
crates/vcs/src/traits.rs (6)
crates/server/src/state.rs (1)
  • new (20-40)
crates/vcs/src/git.rs (14)
  • new (16-22)
  • branch_name (54-56)
  • name (82-84)
  • is_available (86-93)
  • is_initialized (95-98)
  • create_workspace (100-124)
  • get_diff (126-135)
  • get_status (137-144)
  • merge_workspace (146-182)
  • cleanup_workspace (184-206)
  • list_workspaces (208-240)
  • get_conflicts (242-265)
  • commit (267-281)
  • push (283-295)
crates/vcs/src/jj.rs (13)
  • new (15-20)
  • name (54-56)
  • is_available (58-65)
  • is_initialized (67-70)
  • create_workspace (72-106)
  • get_diff (108-114)
  • get_status (116-122)
  • merge_workspace (124-155)
  • cleanup_workspace (157-169)
  • list_workspaces (171-190)
  • get_conflicts (192-216)
  • commit (218-234)
  • push (236-268)
crates/vcs/src/workspace.rs (9)
  • new (35-40)
  • new (60-66)
  • get_diff (190-192)
  • get_status (194-196)
  • merge_workspace (198-204)
  • cleanup_workspace (149-188)
  • list_workspaces (206-208)
  • commit (210-212)
  • push (214-216)
crates/websocket/src/handler.rs (1)
  • new (24-26)
crates/server/src/routes/workspaces.rs (4)
  • merge_workspace (127-145)
  • list_workspaces (50-55)
  • from (21-29)
  • from (114-124)
crates/orchestrator/src/executor.rs (3)
crates/core/src/domain/task.rs (1)
  • new (58-70)
crates/orchestrator/src/state_machine.rs (1)
  • validate_transition (8-19)
crates/orchestrator/src/prompts.rs (4)
  • planning (6-29)
  • implementation (31-51)
  • review (53-78)
  • fix_issues (80-96)
crates/db/src/repositories/session_repository.rs (2)
crates/core/src/domain/session.rs (1)
  • new (80-91)
crates/db/src/models/session.rs (1)
  • from (33-44)
🪛 LanguageTool
agents.md

[grammar] ~3-~3: Ensure spelling is correct
Context: ...tudio - Agent Context > Tento dokument slouzi jako kontext pro AI agenty pracujici na...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)


[grammar] ~3-~3: Ensure spelling is correct
Context: ...ument slouzi jako kontext pro AI agenty pracujici na projektu. > Posledni aktualizace: 20...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)


[grammar] ~4-~4: Ensure spelling is correct
Context: ... pro AI agenty pracujici na projektu. > Posledni aktualizace: 2025-12-30 --- ## 1. Co ...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)


[grammar] ~36-~36: Ensure spelling is correct
Context: ...enCode) (AI check) (human) ``` ### Prechody stavu | From | Allowed To | |------|---...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)


[grammar] ~233-~233: Ensure spelling is correct
Context: ...sion, TaskStatus) - [x] SQLite database s migraci - [x] Basic CRUD API pro tasks - [x] He...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

docs/architecture/backend-implementation-plan.md

[grammar] ~20-~20: Ensure spelling is correct
Context: ...sign, trait-based abstractions --- ## Technologický Stack | Vrstva | Technologie | Verze |...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

product-prd.md

[grammar] ~711-~711: Ensure spelling is correct
Context: ...─────────────┘ ``` #### 9.5.6 Fallback strategie Pro případ, kdy HTTP server není dostupn...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

🪛 markdownlint-cli2 (0.18.1)
agents.md

19-19: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


31-31: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


37-37: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


60-60: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


92-92: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


109-109: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


121-121: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


128-128: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


138-138: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


143-143: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


297-297: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


330-330: Tables should be surrounded by blank lines

(MD058, blanks-around-tables)


333-333: Bare URL used

(MD034, no-bare-urls)

docs/architecture/backend-implementation-plan.md

36-36: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


49-49: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


86-86: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


323-323: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


582-582: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


928-928: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


1008-1008: Fenced code blocks should have a language specified

(MD040, fenced-code-language)

product-prd.md

646-646: Fenced code blocks should have a language specified

(MD040, fenced-code-language)


679-679: Fenced code blocks should have a language specified

(MD040, fenced-code-language)

🔍 Remote MCP

Since the repository isn't yet indexed in DeepWiki, let me search for relevant Rust workspace and project structure best practices that would apply to this PR:## Relevant Context for PR Review

Based on analysis of Rust workspace best practices and the architectural patterns in this PR, I've identified key findings that would help with an effective review:

Workspace Structure & Organization

For projects in the 10k-1M lines of code range, a flat crate layout makes sense, with everything nested one-level deep under crates/ (as exemplified by rust-analyzer with 32 different subfolders). The PR follows this pattern correctly with all crates under crates/ directory.

When creating a workspace, ensure crates are logically separated and serve distinct purposes, avoiding one huge crate handling everything. This PR demonstrates good separation of concerns across 8 specialized crates (core, db, events, opencode, orchestrator, vcs, websocket, server).

Axum Web Framework Alignment

Axum is a web framework focusing on ergonomics and modularity, with macro-free API design that doesn't have its own middleware system but uses tower::Service, providing timeouts, tracing, compression, and authorization for free. The PR's server crate appropriately integrates with TraceLayer and Tower middleware patterns.

Routes should be defined with axum::Router and state (like database pools) shared safely using axum::extract::State with std::sync::Arc. The PR's AppState struct and route handlers follow this pattern correctly.

Database Integration with SQLx

Axum works seamlessly with asynchronous Rust database libraries, with sqlx being compatible with Axum's async nature through async/await support. The PR uses SQLx with sqlite for migrations and pooling, which is appropriate for the foundation phase.

Module Organization Best Practices

Keep the public API of crates as minimal as possible, promoting encapsulation and reducing potential issues from public API changes. The PR appropriately uses re-exports in lib.rs files to control public surface area while organizing internal modules logically (error, domain, models, repositories patterns).

Use version = "0.0.0" for internal crates not intended to publish; if publishing a subset with proper semver, extract them to a separate top-level libs/ folder. The PR correctly uses 0.1.0 (workspace-managed) for all internal crates.

Testing & CI/CD

The .github/workflows/ci.yml establishes a solid CI foundation with:

  • Cargo test, clippy linting, and rustfmt formatting validation
  • Environment variable configuration for Rust backtrace and terminal color output
  • Multi-job execution for comprehensive quality checks

[::web_search::]

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
  • GitHub Check: Greptile Review

Comment thread .github/workflows/ci.yml
Comment on lines +20 to +22
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable

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⚠️ Potential issue | 🔴 Critical

🧩 Analysis chain

🌐 Web query:

dtolnay/rust-toolchain GitHub action

💡 Result:

dtolnay/rust-toolchain is a small GitHub Action that installs a Rust toolchain via rustup with concise defaults and one-line usage. Example usage:

  • uses: dtolnay/rust-toolchain@stable
    (or pin to a tag/commit like @1.89.0 or @nightly)

Key details:

  • Inputs: toolchain (e.g. stable, nightly, 1.89.0; default matches the action @rev), targets, components.
  • Outputs: cachekey (short hash of installed rustc), name (rustup's name for the installed toolchain).
  • You can pass an explicit toolchain input (use @master for the action in that case).
  • Useful for workflows that just need a Rust toolchain set up before running cargo commands.

Sources: [1], [2].

Sources
[1] dtolnay/rust-toolchain (GitHub repository README and action.yml).
[2] rust-toolchain (GitHub Marketplace entry).


Replace dtolnay/rust-action@stable with dtolnay/rust-toolchain@stable.

The action dtolnay/rust-action@stable does not exist. The correct action is dtolnay/rust-toolchain@stable.

      - name: Install Rust toolchain
-       uses: dtolnay/rust-action@stable
+       uses: dtolnay/rust-toolchain@stable
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable
- name: Install Rust toolchain
uses: dtolnay/rust-toolchain@stable
🤖 Prompt for AI Agents
.github/workflows/ci.yml lines 20-22: the workflow references a non-existent
action `dtolnay/rust-action@stable`; update the `uses:` entry to
`dtolnay/rust-toolchain@stable` so the workflow uses the correct Rust toolchain
action, and commit the change to the workflow file.

Comment thread .github/workflows/ci.yml
Comment on lines +43 to +46
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable
with:
components: clippy
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⚠️ Potential issue | 🔴 Critical

Same action name issue in clippy job.

🔎 Proposed fix
       - name: Install Rust toolchain
-        uses: dtolnay/rust-action@stable
+        uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable
with:
components: clippy
- name: Install Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
components: clippy
🤖 Prompt for AI Agents
In .github/workflows/ci.yml around lines 43-46 the step name "Install Rust
toolchain" in the clippy job duplicates another step name; rename this step to a
unique name (e.g., "Install Rust toolchain (clippy)" or "Install Rust toolchain
- clippy job") so the workflow step names are distinct, leaving the
uses/dtolnay/rust-action@stable and with: components: clippy unchanged.

Comment thread .github/workflows/ci.yml
Comment on lines +68 to +71
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable
with:
components: rustfmt
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⚠️ Potential issue | 🔴 Critical

Same action name issue in fmt job.

🔎 Proposed fix
       - name: Install Rust toolchain
-        uses: dtolnay/rust-action@stable
+        uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
- name: Install Rust toolchain
uses: dtolnay/rust-action@stable
with:
components: rustfmt
- name: Install Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
components: rustfmt
🤖 Prompt for AI Agents
In .github/workflows/ci.yml around lines 68 to 71, the step uses the same
top-level "name" value as another step in a different job which causes duplicate
action name confusion; rename this step to a unique, descriptive name (for
example "Install Rust toolchain (fmt job)" or similar) so it differs from the
other job's step name and clearly indicates it belongs to the fmt job.

Comment thread agents.md
| Variable | Default | Description |
|----------|---------|-------------|
| DATABASE_URL | sqlite:./studio.db | SQLite connection |
| OPENCODE_URL | http://localhost:4096 | OpenCode server URL |
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⚠️ Potential issue | 🟡 Minor

Format bare URL as markdown link.

The bare URL should be formatted as a proper markdown link for better readability and to comply with markdown linting standards.

🔎 Proposed fix
-| OPENCODE_URL | http://localhost:4096 | OpenCode server URL |
+| OPENCODE_URL | `http://localhost:4096` | OpenCode server URL |
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
| OPENCODE_URL | http://localhost:4096 | OpenCode server URL |
| OPENCODE_URL | `http://localhost:4096` | OpenCode server URL |
🧰 Tools
🪛 markdownlint-cli2 (0.18.1)

333-333: Bare URL used

(MD034, no-bare-urls)

🤖 Prompt for AI Agents
In agents.md around line 333, the table cell contains a bare URL
("http://localhost:4096"); replace it with a markdown-formatted link
[http://localhost:4096](http://localhost:4096) so the URL renders as a clickable
link and conforms to markdown linting and readability standards.

Comment on lines +47 to +49
fn timestamp_to_datetime(ts: i64) -> DateTime<Utc> {
Utc.timestamp_opt(ts, 0).unwrap()
}
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⚠️ Potential issue | 🟡 Minor

timestamp_opt(...).unwrap() can panic on out-of-range timestamps.

Utc.timestamp_opt(ts, 0) returns LocalResult which is None for invalid timestamps (e.g., far-future or negative values from corruption). Using .unwrap() will panic. Use .single() or provide a fallback.

🔎 Proposed fix
 fn timestamp_to_datetime(ts: i64) -> DateTime<Utc> {
-    Utc.timestamp_opt(ts, 0).unwrap()
+    Utc.timestamp_opt(ts, 0)
+        .single()
+        .unwrap_or_else(|| Utc::now()) // or DateTime::UNIX_EPOCH
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
fn timestamp_to_datetime(ts: i64) -> DateTime<Utc> {
Utc.timestamp_opt(ts, 0).unwrap()
}
fn timestamp_to_datetime(ts: i64) -> DateTime<Utc> {
Utc.timestamp_opt(ts, 0)
.single()
.unwrap_or_else(|| Utc::now()) // or DateTime::UNIX_EPOCH
}
🤖 Prompt for AI Agents
In crates/db/src/models/session.rs around lines 47-49, calling
Utc.timestamp_opt(ts, 0).unwrap() can panic for out-of-range timestamps; replace
the unwrap with safe handling by using .single() and either (A) change the
function to return Option<DateTime<Utc>> and return the .single() result, or (B)
keep the DateTime return and provide a clear fallback (e.g., epoch or a defined
sentinel) via .single().unwrap_or_else(| | fallback_datetime) or convert to
Result and propagate the error; implement one of these safe strategies instead
of unwrap().

Comment thread crates/vcs/src/jj.rs
Comment on lines +80 to +106
self.run_jj(
&[
"new",
"main",
"-m",
&format!("task-{}: Start implementation", task_id),
],
&self.repo_path,
)
.await?;

self.run_jj(
&[
"workspace",
"add",
workspace_path
.to_str()
.ok_or_else(|| VcsError::InvalidPath(workspace_path.display().to_string()))?,
"--name",
&workspace_name,
],
&self.repo_path,
)
.await?;

Ok(Workspace::new(task_id, workspace_path, workspace_name))
}
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⚠️ Potential issue | 🟡 Minor

🧩 Analysis chain

🏁 Script executed:

# First, examine the full context around lines 80-106 in jj.rs
cat -n crates/vcs/src/jj.rs | sed -n '1,120p'

Repository: souky-byte/opencode-os

Length of output: 4198


🏁 Script executed:

# Look for the complete create_workspace function definition
rg -A 40 "fn create_workspace" crates/vcs/src/jj.rs

Repository: souky-byte/opencode-os

Length of output: 1285


🏁 Script executed:

# Search for any locking/synchronization mechanisms
rg "Mutex|RwLock|lock|Lock" crates/vcs/src/jj.rs

Repository: souky-byte/opencode-os

Length of output: 48


🏁 Script executed:

# Check how create_workspace is called elsewhere
rg "create_workspace" crates/vcs/src/ -B 2 -A 2

Repository: souky-byte/opencode-os

Length of output: 1305


🌐 Web query:

jj jujutsu workspace add command concurrent safety semantics

💡 Result:

Short answer: jj workspace add is performed as a normal jj "operation" (it snapshots the working copy, records an operation, and writes the repo metadata for the new workspace). That means:

  • The add is serialized into jj's operation log and recorded in the repo state, not just a blind filesystem change. [1][2]
  • If you run commands "concurrently" (e.g. on two terminals or machines) starting from different operations you can reproduce that by using --at-op; jj's operation/merge logic will deterministically merge divergent operations when the repo is loaded at the latest operation. Mutating commands run at an earlier operation are effectively treated as concurrent operations. [2][3]
  • A workspace can become stale if its working-copy files no longer match the working-copy commit (for example because another workspace rewrote that commit); use jj workspace update-stale to recover. jj records and detects stale working copies and provides recovery semantics. [1][2]
    Practical takeaway: creating a workspace via jj workspace add is safe in the sense that it's an atomic/recorded repo operation (not just a loose file write) and concurrent/joined histories are handled by jj's operation log and merge semantics; if file-state divergence happens you must run workspace update-stale to reconcile the working copy. [1][2][3]

Sources:
[1] Jujutsu docs — Working copy (workspaces, stale update semantics).
[2] Jujutsu CLI reference — jj workspace and jj workspace add.
[3] jj manual pages / jj-workspace-add (notes about --at-op / concurrent-equivalent behavior).


🌐 Web query:

jj jujutsu new command in existing repo idiomatic workflow workspace

💡 Result:

Short, idiomatic workflow to add a new command/change in an existing jj repo (using workspaces for isolation)

  1. Create an isolated workspace for the task (recommended)

    • jj workspace add [--name ] [--revision ]
    • This creates a separate working copy that shares the same .jj repo but has its own working‑copy commit. Use this when you need filesystem isolation (like separate installs) or to run long work in parallel. [1][2]
  2. Make the change in that workspace

    • Edit files in the workspace; jj auto‑snapshots and will record the working‑copy commit when you run most commands (jj st, jj commit, etc.). Use jj new -m "message" to create a new working‑copy commit/change if you want an explicit new change. [1][2]
  3. Iterate and compose changes idiomatically

    • Use jj new to create changes (it replaces old checkout/merge patterns). Rebase/ordering is handled by jj when you compose changes (use -A/-B to position). Use jj squash/absorb as needed to combine changes before publishing. [3][4]
  4. Publish or integrate

    • Push bookmarks with jj git push or merge the change into your main line and/or other workspaces. If you use a colocated Git repo, jj can interoperate with Git remotes. [1][4]

Useful commands/docs

  • CLI / workspace overview: jj workspace (add/list/forget/root/update-stale). [1]
  • Working copy behavior and auto‑snapshotting. [2]
  • jj workspace add options (name, revision, sparse patterns). [3]
  • jj new / recommended workflows and recent design rationale. [4]

If you want, tell me whether you prefer to: (A) work in a new workspace directory, or (B) keep a single workspace and create changes there — I’ll give the exact command sequence for that option.


🏁 Script executed:

# Check if there's any additional context about how jj workspace add with a revision works
rg -i "workspace.*add\|new.*main" crates/vcs/src/ -B 3 -A 3

Repository: souky-byte/opencode-os

Length of output: 48


🏁 Script executed:

# Look at workspace.rs to understand the broader context of create_workspace usage
cat -n crates/vcs/src/workspace.rs | head -60

Repository: souky-byte/opencode-os

Length of output: 2079


Use idiomatic jj workspace creation pattern.

Creating a change (jj new main) before isolating it in a workspace is non-idiomatic. The recommended jj workflow is to create the workspace first with jj workspace add, then make changes within that isolated workspace. Reversing the order may complicate jj's workspace independence model.

Suggested fix: Create the workspace first, then run jj new from within the new workspace's context.

Comment on lines +48 to +53
_ = heartbeat.tick() => {
let ping_msg = serde_json::to_string(&ServerMessage::Pong).unwrap();
if sender.send(Message::Text(ping_msg.into())).await.is_err() {
break;
}
}
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⚠️ Potential issue | 🟡 Minor

Heartbeat sends Pong instead of Ping.

The server-initiated heartbeat should send a Ping message to probe client liveness. Sending Pong without a prior Ping from the client is semantically incorrect and won't trigger a client response.

🔎 Proposed fix
             _ = heartbeat.tick() => {
-                let ping_msg = serde_json::to_string(&ServerMessage::Pong).unwrap();
-                if sender.send(Message::Text(ping_msg.into())).await.is_err() {
+                // Send WebSocket protocol-level ping for heartbeat
+                if sender.send(Message::Ping(vec![])).await.is_err() {
                     break;
                 }
             }
🤖 Prompt for AI Agents
In crates/websocket/src/handler.rs around lines 48–53, the heartbeat currently
serializes ServerMessage::Pong and sends it as a Text frame; instead the server
should probe client liveness by sending a WebSocket Ping. Change the code to
serialize (or otherwise produce) a Ping payload and send it with Message::Ping
(or at minimum replace ServerMessage::Pong with ServerMessage::Ping if your
protocol uses text pings), i.e. send a Ping frame (empty or with the serialized
Ping payload) rather than a Pong Text message so clients will respond with a
Pong.

Comment on lines +134 to +136
Err(_) => {
tracing::debug!("WebSocket client timeout, sending ping");
}
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⚠️ Potential issue | 🟡 Minor

Timeout branch logs "sending ping" but doesn't send anything.

When the client times out, the code logs a debug message about sending a ping but then does nothing. Either send an actual ping to probe the client, or disconnect after repeated timeouts.

🔎 Proposed fix: send actual ping on timeout
                     Err(_) => {
                         tracing::debug!("WebSocket client timeout, sending ping");
+                        if sender.send(Message::Ping(vec![])).await.is_err() {
+                            break;
+                        }
                     }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
Err(_) => {
tracing::debug!("WebSocket client timeout, sending ping");
}
Err(_) => {
tracing::debug!("WebSocket client timeout, sending ping");
if sender.send(Message::Ping(vec![])).await.is_err() {
break;
}
}

Comment on lines +117 to +127
└── api/
├── Cargo.toml
└── src/
├── main.rs
├── routes/
│ ├── mod.rs
│ ├── health.rs
│ └── tasks.rs
├── state.rs # AppState
└── error.rs # HTTP error handling
```
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⚠️ Potential issue | 🟠 Major

🧩 Analysis chain

🏁 Script executed:

# Check actual crate names in workspace
ls -la crates/ 2>/dev/null | grep -E "^d" || echo "No crates directory found"

Repository: souky-byte/opencode-os

Length of output: 618


🏁 Script executed:

# Also check if there are any crates at root level
ls -la | grep -E "^d" | head -20

Repository: souky-byte/opencode-os

Length of output: 461


🏁 Script executed:

# Check the actual file mentioned in the review
if [ -f "docs/architecture/backend-implementation-plan.md" ]; then
  echo "=== Lines 117-127 from documentation ===" 
  sed -n '117,127p' docs/architecture/backend-implementation-plan.md
fi

Repository: souky-byte/opencode-os

Length of output: 372


🏁 Script executed:

# Search for references to 'api' and 'server' crate names in the codebase
echo "=== Searching for 'crates/api' references ===" 
rg "crates/api" --max-count=5

echo "=== Searching for 'crates/server' references ===" 
rg "crates/server" --max-count=5

Repository: souky-byte/opencode-os

Length of output: 432


🏁 Script executed:

# Check if Cargo.toml workspace members define actual crate names
if [ -f "Cargo.toml" ]; then
  echo "=== Workspace members from root Cargo.toml ===" 
  rg "members\s*=" Cargo.toml -A 20
fi

Repository: souky-byte/opencode-os

Length of output: 527


Update documentation to reference server/ crate instead of api/.

The repository has a crates/server/ crate (confirmed in the root Cargo.toml workspace members), but docs/architecture/backend-implementation-plan.md at lines 117-127 shows a tree structure labeled api/ with references to crates/api/ throughout the documentation. The crates/api/ crate does not exist in the repository—only crates/server/ is present. Update the documentation to reflect the actual crate name.

🤖 Prompt for AI Agents
In docs/architecture/backend-implementation-plan.md around lines 117 to 127, the
file tree and references incorrectly use "api/" but the actual crate in the
repository is "crates/server/"; update the documentation to rename the top-level
directory and all mentions from "api/" to "server/" (and change any paths like
crates/api/ to crates/server/), ensuring the listed files (Cargo.toml,
src/main.rs, routes/, state.rs, error.rs) and any cross-references point to the
existing crates/server/ crate so the docs match the repo structure.

Comment on lines +232 to +246
```sql
-- Tasks table
CREATE TABLE IF NOT EXISTS tasks (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
description TEXT NOT NULL,
status TEXT NOT NULL DEFAULT 'Todo',
roadmap_item_id TEXT,
workspace_path TEXT,
created_at INTEGER NOT NULL,
updated_at INTEGER NOT NULL
);

CREATE INDEX idx_tasks_status ON tasks(status);
CREATE INDEX idx_tasks_created_at ON tasks(created_at);
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⚠️ Potential issue | 🟡 Minor

Schema example differs from actual migration.

The documentation shows status TEXT NOT NULL DEFAULT 'Todo' (Pascal case), but the actual migration at crates/db/migrations/001_initial.sql uses DEFAULT 'todo' (lowercase). Ensure consistency between documentation and implementation.

🤖 Prompt for AI Agents
docs/architecture/backend-implementation-plan.md lines 232-246: the SQL schema
in the docs uses DEFAULT 'Todo' for the tasks.status column while the actual
migration (crates/db/migrations/001_initial.sql) uses DEFAULT 'todo', causing
inconsistency; update the documentation to match the migration by changing the
default to 'todo' (lowercase) wherever the schema example appears, or
alternatively update the migration to use 'Todo' if the intended canonical value
is PascalCase—ensure both doc and migration use the exact same string.

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