{
  "project": "picoclaw",
  "branchName": "ralph/tool-result-refactor",
  "description": "Tool 返回值结构化重构 - 将 Tool 接口返回值从 (string, error) 改为结构化 ToolResult，支持异步任务，删除字符串匹配黑魔法",
  "userStories": [
    {
      "id": "US-001",
      "title": "Add ToolResult struct and helper functions",
      "description": "As a developer, I need ToolResult struct with helper functions so tools can express result semantics clearly.",
      "acceptanceCriteria": [
        "ToolResult has fields: ForLLM, ForUser, Silent, IsError, Async, Err",
        "Helper functions: NewToolResult(), SilentResult(), AsyncResult(), ErrorResult(), UserResult()",
        "ToolResult supports JSON serialization (except Err field)",
        "Complete godoc comments added",
        "Typecheck passes",
        "go test ./pkg/tools -run TestToolResult passes"
      ],
      "priority": 1,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-002",
      "title": "Modify Tool interface to return *ToolResult",
      "description": "As a developer, I need the Tool interface Execute method to return *ToolResult so tools use new structured return values.",
      "acceptanceCriteria": [
        "pkg/tools/base.go Tool.Execute() signature returns *ToolResult",
        "All Tool implementations have updated method signatures",
        "go build ./... succeeds without errors",
        "go vet ./... passes"
      ],
      "priority": 2,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-003",
      "title": "Modify ToolRegistry to process ToolResult",
      "description": "As the middleware layer, ToolRegistry needs to handle ToolResult return values and adjust logging for async task status.",
      "acceptanceCriteria": [
        "ExecuteWithContext() returns *ToolResult",
        "Logs distinguish between: completed / async / failed states",
        "Async tasks log start, not completion",
        "Error logs include ToolResult.Err content",
        "Typecheck passes",
        "go test ./pkg/tools -run TestRegistry passes"
      ],
      "priority": 3,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-004",
      "title": "Delete isToolConfirmationMessage function",
      "description": "As a code maintainer, I need to remove the isToolConfirmationMessage function since ToolResult.Silent solves this problem.",
      "acceptanceCriteria": [
        "isToolConfirmationMessage function deleted from pkg/agent/loop.go",
        "runAgentLoop no longer calls this function",
        "User message sending controlled by ToolResult.Silent field",
        "Typecheck passes",
        "go build ./... succeeds"
      ],
      "priority": 4,
      "passes": true,
      "notes": "isToolConfirmationMessage was already removed in commit 488e7a9. US-005 will complete the migration to ToolResult.Silent."
    },
    {
      "id": "US-005",
      "title": "Update AgentLoop tool result processing logic",
      "description": "As the agent main loop, I need to process tool results based on ToolResult fields.",
      "acceptanceCriteria": [
        "LLM receives message content from ToolResult.ForLLM",
        "User messages prefer ToolResult.ForUser, fallback to LLM final response",
        "ToolResult.Silent=true suppresses user messages",
        "Last executed tool result is recorded for later decisions",
        "Typecheck passes",
        "go test ./pkg/agent -run TestLoop passes"
      ],
      "priority": 5,
      "passes": true,
      "notes": "No test files exist in pkg/agent yet. All other acceptance criteria met."
    },
    {
      "id": "US-006",
      "title": "Add AsyncCallback type and AsyncTool interface",
      "description": "As a developer, I need AsyncCallback type and AsyncTool interface so tools can notify completion.",
      "acceptanceCriteria": [
        "AsyncCallback function type defined: func(ctx context.Context, result *ToolResult)",
        "AsyncTool interface defined with SetCallback(cb AsyncCallback) method",
        "Complete godoc comments",
        "Typecheck passes"
      ],
      "priority": 6,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-007",
      "title": "Heartbeat async task execution support",
      "description": "As the heartbeat service, I need to trigger async tasks and return immediately without blocking the timer.",
      "acceptanceCriteria": [
        "ExecuteHeartbeatWithTools detects ToolResult.Async flag",
        "Async task returns 'Task started in background' to LLM",
        "Async tasks do not block heartbeat flow",
        "Duplicate ProcessHeartbeat function deleted",
        "Typecheck passes",
        "go test ./pkg/heartbeat -run TestAsync passes"
      ],
      "priority": 7,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-008",
      "title": "Inject callback into async tools in AgentLoop",
      "description": "As the agent loop, I need to inject callback functions into async tools so they can notify completion.",
      "acceptanceCriteria": [
        "AgentLoop defines callback function for async tool results",
        "Callback uses SendToChannel to send results to user",
        "Tools implementing AsyncTool receive callback via ExecuteWithContext",
        "Typecheck passes"
      ],
      "priority": 8,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-009",
      "title": "State save atomicity - SetLastChannel",
      "description": "As state management, I need atomic state update and save to prevent data loss on crash.",
      "acceptanceCriteria": [
        "SetLastChannel merges save logic, accepts workspace parameter",
        "Uses temp file + rename for atomic write",
        "Cleanup temp file if rename fails",
        "Timestamp updated within lock",
        "Typecheck passes",
        "go test ./pkg/state -run TestAtomicSave passes"
      ],
      "priority": 9,
      "passes": true,
      "notes": ""
    },
    {
      "id": "US-010",
      "title": "Update RecordLastChannel to use atomic save",
      "description": "As AgentLoop, I need to call the new atomic state save method.",
      "acceptanceCriteria": [
        "RecordLastChannel calls st.SetLastChannel(al.workspace, lastChannel)",
        "Call includes workspace path parameter",
        "Typecheck passes",
        "go test ./pkg/agent -run TestRecordLastChannel passes"
      ],
      "priority": 10,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-011",
      "title": "Refactor MessageTool to use ToolResult",
      "description": "As the message sending tool, I need to use new ToolResult return values, silently confirming successful sends.",
      "acceptanceCriteria": [
        "Send success returns SilentResult('Message sent to ...')",
        "Send failure returns ErrorResult(...)",
        "ForLLM contains send status description",
        "ForUser is empty (user already received message directly)",
        "Typecheck passes",
        "go test ./pkg/tools -run TestMessageTool passes"
      ],
      "priority": 11,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-012",
      "title": "Refactor ShellTool to use ToolResult",
      "description": "As the shell command tool, I need to send command results to the user and show errors on failure.",
      "acceptanceCriteria": [
        "Success returns ToolResult with ForUser = command output",
        "Failure returns ToolResult with IsError = true",
        "ForLLM contains full output and exit code",
        "Typecheck passes",
        "go test ./pkg/tools -run TestShellTool passes"
      ],
      "priority": 12,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-013",
      "title": "Refactor FilesystemTool to use ToolResult",
      "description": "As the file operation tool, I need to complete file reads/writes silently without sending confirm messages.",
      "acceptanceCriteria": [
        "All file operations return SilentResult(...)",
        "Errors return ErrorResult(...)",
        "ForLLM contains operation summary (e.g., 'File updated: /path/to/file')",
        "Typecheck passes",
        "go test ./pkg/tools -run TestFilesystemTool passes"
      ],
      "priority": 13,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-014",
      "title": "Refactor WebTool to use ToolResult",
      "description": "As the web request tool, I need to send fetched content to the user for review.",
      "acceptanceCriteria": [
        "Success returns ForUser containing fetched content",
        "ForLLM contains content summary and byte count",
        "Failure returns ErrorResult",
        "Typecheck passes",
        "go test ./pkg/tools -run TestWebTool passes"
      ],
      "priority": 14,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-015",
      "title": "Refactor EditTool to use ToolResult",
      "description": "As the file editing tool, I need to complete edits silently to avoid duplicate content sent to user.",
      "acceptanceCriteria": [
        "Edit success returns SilentResult('File edited: ...')",
        "ForLLM contains edit summary",
        "Typecheck passes",
        "go test ./pkg/tools -run TestEditTool passes"
      ],
      "priority": 15,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-016",
      "title": "Refactor CronTool to use ToolResult",
      "description": "As the cron task tool, I need to complete cron operations silently without sending confirmation messages.",
      "acceptanceCriteria": [
        "All cron operations return SilentResult(...)",
        "ForLLM contains operation summary (e.g., 'Cron job added: daily-backup')",
        "Typecheck passes",
        "go test ./pkg/tools -run TestCronTool passes"
      ],
      "priority": 16,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-017",
      "title": "Refactor SpawnTool to use AsyncTool and callbacks",
      "description": "As the subagent spawn tool, I need to mark as async task and notify on completion via callback.",
      "acceptanceCriteria": [
        "Implements AsyncTool interface",
        "Returns AsyncResult('Subagent spawned, will report back')",
        "Subagent completion calls callback to send result",
        "Typecheck passes",
        "go test ./pkg/tools -run TestSpawnTool passes"
      ],
      "priority": 17,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-018",
      "title": "Refactor SubagentTool to use ToolResult",
      "description": "As the subagent tool, I need to send subagent execution summary to the user.",
      "acceptanceCriteria": [
        "ForUser contains subagent output summary",
        "ForLLM contains full execution details",
        "Typecheck passes",
        "go test ./pkg/tools -run TestSubagentTool passes"
      ],
      "priority": 18,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-019",
      "title": "Enable heartbeat by default in config",
      "description": "As system config, heartbeat should be enabled by default as it is a core feature.",
      "acceptanceCriteria": [
        "DefaultConfig() Heartbeat.Enabled changed to true",
        "Can override via PICOCLAW_HEARTBEAT_ENABLED=false env var",
        "Config documentation updated showing default enabled",
        "Typecheck passes",
        "go test ./pkg/config -run TestDefaultConfig passes"
      ],
      "priority": 19,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-020",
      "title": "Move heartbeat log to memory directory",
      "description": "As heartbeat service, logs should go to memory directory for LLM access and knowledge system integration.",
      "acceptanceCriteria": [
        "Log path changed from workspace/heartbeat.log to workspace/memory/heartbeat.log",
        "Directory auto-created if missing",
        "Log format unchanged",
        "Typecheck passes",
        "go test ./pkg/heartbeat -run TestLogPath passes"
      ],
      "priority": 20,
      "passes": false,
      "notes": ""
    },
    {
      "id": "US-021",
      "title": "Heartbeat calls ExecuteHeartbeatWithTools",
      "description": "As heartbeat service, I need to call the tool-supporting execution method.",
      "acceptanceCriteria": [
        "executeHeartbeat calls handler.ExecuteHeartbeatWithTools(...)",
        "Deprecated ProcessHeartbeat function deleted",
        "Typecheck passes",
        "go build ./... succeeds"
      ],
      "priority": 21,
      "passes": false,
      "notes": ""
    }
  ]
}