新增: 多Agent数据层(V36迁移+3新表+Repo CRUD+7个测试全绿)

- V36: ai_plans/ai_subtasks/ai_conflicts 3 新表 + ai_messages/ai_tool_executions 加 subtask_id

- models: PlanRecord/SubTaskRecord/ConflictRecord 结构体

- PlanRepo/SubTaskRepo/ConflictRepo CRUD(insert/get/list_by_*/update_status/resolve)

- 7个 Repo 单元测试全部通过(内存 SQLite + 全迁移)

- 顺带修复 task_repo.rs 预存测试编译错误(trec_full 参数类型+缺失 await)

Batch.md

@@ -437,6 +437,8 @@
 
 ### 数据层 + Git worktree 隔离 + 并行执行
 
+- **提交**: `当前待提交`
+
 | # | 任务 | 文件 |
 |---|------|------|
 | 1 | V36 迁移(ai_plans/ai_subtasks/ai_conflicts 3 新表 + ai_messages/ai_tool_executions 加 subtask_id + subtasks.branch + conflicts.conflict_type) | migrations.rs |

crates/df-storage/src/crud/mod.rs

@@ -17,6 +17,9 @@
 //! re-export(`pub use ...::*`)保持 `df_storage::crud::XxxRepo` /
 //! `df_storage::crud::is_allowed_column` 路径不变,**调用方零改动**。
 
+mod module_dependency_repo;
+mod plan_repo;
+
 mod conversation_repo;
 mod idea_eval_repo;
 mod idea_repo;
@@ -28,7 +31,6 @@ mod project_service_repo;
 mod settings;
 mod task_link_repo;
 mod task_repo;
-mod module_dependency_repo;
 
 pub use conversation_repo::*;
 pub use idea_eval_repo::*;
@@ -42,6 +44,7 @@ pub use settings::*;
 pub use task_link_repo::*;
 pub use task_repo::*;
 pub use module_dependency_repo::*;
+pub use plan_repo::*;
 
 // ============================================================
 // 辅助宏 — 消除多个 Repo 的重复样板

crates/df-storage/src/crud/plan_repo.rs

@@ -0,0 +1,579 @@
+//! 多 Agent 并行执行 Repo — ai_plans / ai_subtasks / ai_conflicts 表 CRUD(V36)
+//!
+//! 设计依据:docs/02-架构设计/专项设计/多Agent并行执行与仲裁合并设计-2026-07-01.md §二
+
+use std::sync::Arc;
+
+use rusqlite::{params, OptionalExtension, Row};
+use tokio::sync::Mutex;
+
+use crate::db::Database;
+use crate::models::{ConflictRecord, PlanRecord, SubTaskRecord};
+
+use super::storage_err;
+
+type Result<T> = std::result::Result<T, df_types::error::Error>;
+
+fn plan_from_row(row: &Row<'_>) -> rusqlite::Result<PlanRecord> {
+    Ok(PlanRecord {
+        id: row.get("id")?,
+        conversation_id: row.get("conversation_id")?,
+        user_message_id: row.get("user_message_id")?,
+        status: row.get("status")?,
+        subtask_count: row.get("subtask_count")?,
+        created_at: row.get("created_at")?,
+        completed_at: row.get("completed_at")?,
+    })
+}
+
+fn subtask_from_row(row: &Row<'_>) -> rusqlite::Result<SubTaskRecord> {
+    Ok(SubTaskRecord {
+        id: row.get("id")?,
+        plan_id: row.get("plan_id")?,
+        persona_id: row.get("persona_id")?,
+        intent: row.get("intent")?,
+        status: row.get("status")?,
+        layer: row.get("layer")?,
+        deps: row.get("deps")?,
+        branch: row.get("branch")?,
+        created_at: row.get("created_at")?,
+        completed_at: row.get("completed_at")?,
+    })
+}
+
+fn conflict_from_row(row: &Row<'_>) -> rusqlite::Result<ConflictRecord> {
+    Ok(ConflictRecord {
+        id: row.get("id")?,
+        plan_id: row.get("plan_id")?,
+        file_path: row.get("file_path")?,
+        conflict_type: row.get("conflict_type")?,
+        subtask_a: row.get("subtask_a")?,
+        subtask_b: row.get("subtask_b")?,
+        diff_a: row.get("diff_a")?,
+        diff_b: row.get("diff_b")?,
+        resolution: row.get("resolution")?,
+        resolved_by: row.get("resolved_by")?,
+        created_at: row.get("created_at")?,
+        resolved_at: row.get("resolved_at")?,
+    })
+}
+
+// ============================================================
+// PlanRepo
+// ============================================================
+
+pub struct PlanRepo {
+    conn: Arc<Mutex<rusqlite::Connection>>,
+}
+
+impl PlanRepo {
+    pub fn new(db: &Database) -> Self {
+        Self { conn: db.conn() }
+    }
+
+    pub async fn insert(&self, record: PlanRecord) -> Result<String> {
+        let conn = self.conn.clone();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            guard
+                .execute(
+                    "INSERT INTO ai_plans \
+                     (id, conversation_id, user_message_id, status, subtask_count, created_at, completed_at) \
+                     VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)",
+                    params![
+                        record.id, record.conversation_id, record.user_message_id,
+                        record.status, record.subtask_count, record.created_at, record.completed_at,
+                    ],
+                )
+                .map_err(storage_err)?;
+            Ok(record.id)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn get(&self, id: &str) -> Result<Option<PlanRecord>> {
+        let conn = self.conn.clone();
+        let id = id.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let row = guard
+                .query_row("SELECT * FROM ai_plans WHERE id = ?1", params![id], plan_from_row)
+                .optional()
+                .map_err(storage_err)?;
+            Ok(row)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn update_status(
+        &self,
+        id: &str,
+        status: &str,
+        completed_at: Option<&str>,
+    ) -> Result<bool> {
+        let conn = self.conn.clone();
+        let id = id.to_owned();
+        let status = status.to_owned();
+        let completed_at = completed_at.map(|s| s.to_owned());
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let affected = guard
+                .execute(
+                    "UPDATE ai_plans SET status = ?1, completed_at = ?2 WHERE id = ?3",
+                    params![status, completed_at, id],
+                )
+                .map_err(storage_err)?;
+            Ok(affected > 0)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn list_by_conversation(&self, conv_id: &str) -> Result<Vec<PlanRecord>> {
+        let conn = self.conn.clone();
+        let conv_id = conv_id.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let mut stmt = guard
+                .prepare("SELECT * FROM ai_plans WHERE conversation_id = ?1 ORDER BY created_at DESC")
+                .map_err(storage_err)?;
+            let rows = stmt.query_map(params![conv_id], plan_from_row).map_err(storage_err)?;
+            let mut results = Vec::new();
+            for r in rows {
+                results.push(r.map_err(storage_err)?);
+            }
+            Ok(results)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+}
+
+// ============================================================
+// SubTaskRepo
+// ============================================================
+
+pub struct SubTaskRepo {
+    conn: Arc<Mutex<rusqlite::Connection>>,
+}
+
+impl SubTaskRepo {
+    pub fn new(db: &Database) -> Self {
+        Self { conn: db.conn() }
+    }
+
+    pub async fn insert(&self, record: SubTaskRecord) -> Result<String> {
+        let conn = self.conn.clone();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            guard
+                .execute(
+                    "INSERT INTO ai_subtasks \
+                     (id, plan_id, persona_id, intent, status, layer, deps, branch, created_at, completed_at) \
+                     VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10)",
+                    params![
+                        record.id, record.plan_id, record.persona_id, record.intent,
+                        record.status, record.layer, record.deps, record.branch,
+                        record.created_at, record.completed_at,
+                    ],
+                )
+                .map_err(storage_err)?;
+            Ok(record.id)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn list_by_plan(&self, plan_id: &str) -> Result<Vec<SubTaskRecord>> {
+        let conn = self.conn.clone();
+        let plan_id = plan_id.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let mut stmt = guard
+                .prepare("SELECT * FROM ai_subtasks WHERE plan_id = ?1 ORDER BY layer ASC, created_at ASC")
+                .map_err(storage_err)?;
+            let rows = stmt.query_map(params![plan_id], subtask_from_row).map_err(storage_err)?;
+            let mut results = Vec::new();
+            for r in rows {
+                results.push(r.map_err(storage_err)?);
+            }
+            Ok(results)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn update_status(
+        &self,
+        id: &str,
+        status: &str,
+        completed_at: Option<&str>,
+    ) -> Result<bool> {
+        let conn = self.conn.clone();
+        let id = id.to_owned();
+        let status = status.to_owned();
+        let completed_at = completed_at.map(|s| s.to_owned());
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let affected = guard
+                .execute(
+                    "UPDATE ai_subtasks SET status = ?1, completed_at = ?2 WHERE id = ?3",
+                    params![status, completed_at, id],
+                )
+                .map_err(storage_err)?;
+            Ok(affected > 0)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+}
+
+// ============================================================
+// ConflictRepo
+// ============================================================
+
+pub struct ConflictRepo {
+    conn: Arc<Mutex<rusqlite::Connection>>,
+}
+
+impl ConflictRepo {
+    pub fn new(db: &Database) -> Self {
+        Self { conn: db.conn() }
+    }
+
+    pub async fn insert(&self, record: ConflictRecord) -> Result<String> {
+        let conn = self.conn.clone();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            guard
+                .execute(
+                    "INSERT INTO ai_conflicts \
+                     (id, plan_id, file_path, conflict_type, subtask_a, subtask_b, diff_a, diff_b, \
+                     resolution, resolved_by, created_at, resolved_at) \
+                     VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)",
+                    params![
+                        record.id, record.plan_id, record.file_path, record.conflict_type,
+                        record.subtask_a, record.subtask_b, record.diff_a, record.diff_b,
+                        record.resolution, record.resolved_by, record.created_at, record.resolved_at,
+                    ],
+                )
+                .map_err(storage_err)?;
+            Ok(record.id)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn list_pending(&self, plan_id: &str) -> Result<Vec<ConflictRecord>> {
+        let conn = self.conn.clone();
+        let plan_id = plan_id.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let mut stmt = guard
+                .prepare("SELECT * FROM ai_conflicts WHERE plan_id = ?1 AND resolution = 'pending' ORDER BY created_at ASC")
+                .map_err(storage_err)?;
+            let rows = stmt.query_map(params![plan_id], conflict_from_row).map_err(storage_err)?;
+            let mut results = Vec::new();
+            for r in rows {
+                results.push(r.map_err(storage_err)?);
+            }
+            Ok(results)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
+    pub async fn resolve(
+        &self,
+        id: &str,
+        resolution: &str,
+        resolved_by: &str,
+        resolved_at: &str,
+    ) -> Result<bool> {
+        let conn = self.conn.clone();
+        let id = id.to_owned();
+        let resolution = resolution.to_owned();
+        let resolved_by = resolved_by.to_owned();
+        let resolved_at = resolved_at.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let affected = guard
+                .execute(
+                    "UPDATE ai_conflicts SET resolution = ?1, resolved_by = ?2, resolved_at = ?3 WHERE id = ?4",
+                    params![resolution, resolved_by, resolved_at, id],
+                )
+                .map_err(storage_err)?;
+            Ok(affected > 0)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::db::Database;
+
+    async fn setup() -> Database {
+        let db = Database::open_in_memory().await.expect("open_in_memory");
+        let conn = db.conn();
+        tokio::task::spawn_blocking(move || {
+            crate::migrations::run(&conn.blocking_lock()).expect("migrations");
+        })
+        .await
+        .expect("spawn_blocking");
+        db
+    }
+
+    #[tokio::test]
+    async fn repo_01_plan_insert_and_get() {
+        let db = setup().await;
+        let repo = PlanRepo::new(&db);
+        let plan = PlanRecord {
+            id: "plan-001".into(),
+            conversation_id: "conv-001".into(),
+            user_message_id: Some("msg-001".into()),
+            status: "planning".into(),
+            subtask_count: 2,
+            created_at: "2026-07-01T00:00:00Z".into(),
+            completed_at: None,
+        };
+        let id = repo.insert(plan.clone()).await.unwrap();
+        assert_eq!(id, "plan-001");
+        let got = repo.get("plan-001").await.unwrap().unwrap();
+        assert_eq!(got.status, "planning");
+        assert_eq!(got.subtask_count, 2);
+    }
+
+    #[tokio::test]
+    async fn repo_02_plan_update_status() {
+        let db = setup().await;
+        let repo = PlanRepo::new(&db);
+        repo.insert(PlanRecord {
+            id: "plan-002".into(),
+            conversation_id: "conv-001".into(),
+            user_message_id: None,
+            status: "planning".into(),
+            subtask_count: 0,
+            created_at: "2026-07-01T00:00:00Z".into(),
+            completed_at: None,
+        })
+        .await
+        .unwrap();
+        assert!(repo.update_status("plan-002", "executing", None).await.unwrap());
+        let got = repo.get("plan-002").await.unwrap().unwrap();
+        assert_eq!(got.status, "executing");
+    }
+
+    #[tokio::test]
+    async fn repo_03_subtask_insert_and_list() {
+        let db = setup().await;
+        let plan_repo = PlanRepo::new(&db);
+        let st_repo = SubTaskRepo::new(&db);
+        plan_repo
+            .insert(PlanRecord {
+                id: "plan-003".into(),
+                conversation_id: "conv-001".into(),
+                user_message_id: None,
+                status: "planning".into(),
+                subtask_count: 2,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        st_repo
+            .insert(SubTaskRecord {
+                id: "st-001".into(),
+                plan_id: "plan-003".into(),
+                persona_id: Some("coder".into()),
+                intent: "读取代码".into(),
+                status: "pending".into(),
+                layer: 0,
+                deps: None,
+                branch: Some("subtask/plan-003/st-001".into()),
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        st_repo
+            .insert(SubTaskRecord {
+                id: "st-002".into(),
+                plan_id: "plan-003".into(),
+                persona_id: Some("coder".into()),
+                intent: "修改代码".into(),
+                status: "pending".into(),
+                layer: 1,
+                deps: Some(r#"["st-001"]"#.into()),
+                branch: Some("subtask/plan-003/st-002".into()),
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        let list = st_repo.list_by_plan("plan-003").await.unwrap();
+        assert_eq!(list.len(), 2);
+        assert_eq!(list[0].layer, 0); // layer 排序
+        assert_eq!(list[1].layer, 1);
+    }
+
+    #[tokio::test]
+    async fn repo_04_subtask_update_status() {
+        let db = setup().await;
+        let plan_repo = PlanRepo::new(&db);
+        let st_repo = SubTaskRepo::new(&db);
+        plan_repo
+            .insert(PlanRecord {
+                id: "plan-004".into(),
+                conversation_id: "conv-001".into(),
+                user_message_id: None,
+                status: "planning".into(),
+                subtask_count: 1,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        st_repo
+            .insert(SubTaskRecord {
+                id: "st-004".into(),
+                plan_id: "plan-004".into(),
+                persona_id: None,
+                intent: "test".into(),
+                status: "pending".into(),
+                layer: 0,
+                deps: None,
+                branch: None,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        assert!(st_repo.update_status("st-004", "done", Some("2026-07-01T01:00:00Z")).await.unwrap());
+        let list = st_repo.list_by_plan("plan-004").await.unwrap();
+        assert_eq!(list[0].status, "done");
+    }
+
+    #[tokio::test]
+    async fn repo_05_conflict_insert_and_list_pending() {
+        let db = setup().await;
+        let plan_repo = PlanRepo::new(&db);
+        let conf_repo = ConflictRepo::new(&db);
+        plan_repo
+            .insert(PlanRecord {
+                id: "plan-005".into(),
+                conversation_id: "conv-001".into(),
+                user_message_id: None,
+                status: "merging".into(),
+                subtask_count: 2,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        conf_repo
+            .insert(ConflictRecord {
+                id: "conf-001".into(),
+                plan_id: "plan-005".into(),
+                file_path: "src/main.rs".into(),
+                conflict_type: "file".into(),
+                subtask_a: Some("st-a".into()),
+                subtask_b: Some("st-b".into()),
+                diff_a: Some("-old\n+new_a".into()),
+                diff_b: Some("-old\n+new_b".into()),
+                resolution: "pending".into(),
+                resolved_by: None,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                resolved_at: None,
+            })
+            .await
+            .unwrap();
+        let pending = conf_repo.list_pending("plan-005").await.unwrap();
+        assert_eq!(pending.len(), 1);
+        assert_eq!(pending[0].file_path, "src/main.rs");
+    }
+
+    #[tokio::test]
+    async fn repo_06_conflict_resolve() {
+        let db = setup().await;
+        let plan_repo = PlanRepo::new(&db);
+        let conf_repo = ConflictRepo::new(&db);
+        plan_repo
+            .insert(PlanRecord {
+                id: "plan-006".into(),
+                conversation_id: "conv-001".into(),
+                user_message_id: None,
+                status: "merging".into(),
+                subtask_count: 1,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        conf_repo
+            .insert(ConflictRecord {
+                id: "conf-002".into(),
+                plan_id: "plan-006".into(),
+                file_path: "src/lib.rs".into(),
+                conflict_type: "semantic".into(),
+                subtask_a: None,
+                subtask_b: None,
+                diff_a: None,
+                diff_b: None,
+                resolution: "pending".into(),
+                resolved_by: None,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                resolved_at: None,
+            })
+            .await
+            .unwrap();
+        assert!(
+            conf_repo
+                .resolve("conf-002", "merged", "reviewer", "2026-07-01T02:00:00Z")
+                .await
+                .unwrap()
+        );
+        let pending = conf_repo.list_pending("plan-006").await.unwrap();
+        assert_eq!(pending.len(), 0, "解决后 pending 列表应为空");
+    }
+
+    #[tokio::test]
+    async fn repo_07_subtask_branch_null_for_non_git() {
+        let db = setup().await;
+        let plan_repo = PlanRepo::new(&db);
+        let st_repo = SubTaskRepo::new(&db);
+        plan_repo
+            .insert(PlanRecord {
+                id: "plan-007".into(),
+                conversation_id: "conv-001".into(),
+                user_message_id: None,
+                status: "planning".into(),
+                subtask_count: 1,
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        st_repo
+            .insert(SubTaskRecord {
+                id: "st-007".into(),
+                plan_id: "plan-007".into(),
+                persona_id: None,
+                intent: "非 Git 工程".into(),
+                status: "pending".into(),
+                layer: 0,
+                deps: None,
+                branch: None, // 非 Git 工程
+                created_at: "2026-07-01T00:00:00Z".into(),
+                completed_at: None,
+            })
+            .await
+            .unwrap();
+        let list = st_repo.list_by_plan("plan-007").await.unwrap();
+        assert!(list[0].branch.is_none(), "非 Git 工程 branch 应为 NULL");
+    }
+}

crates/df-storage/src/crud/task_repo.rs

@@ -784,16 +784,16 @@ mod tests {
         let repo = setup().await;
         repo.insert(trec("parent", "todo", None)).await.unwrap();
         // 4 个子任务:status 分布 todo×2 / in_progress×1 / done×1(queue 统一 todo)
-        repo.insert(trec_full("c1", "todo", Some("parent"), "todo"))
+        repo.insert(trec_full("c1", "todo", Some("parent"), TaskStatus::Todo))
             .await
             .unwrap();
-        repo.insert(trec_full("c2", "todo", Some("parent"), "todo"))
+        repo.insert(trec_full("c2", "todo", Some("parent"), TaskStatus::Todo))
             .await
             .unwrap();
-        repo.insert(trec_full("c3", "todo", Some("parent"), "in_progress"))
+        repo.insert(trec_full("c3", "todo", Some("parent"), TaskStatus::InProgress))
             .await
             .unwrap();
-        repo.insert(trec_full("c4", "todo", Some("parent"), "done"))
+        repo.insert(trec_full("c4", "todo", Some("parent"), TaskStatus::Done))
             .await
             .unwrap();
 
@@ -841,7 +841,7 @@ mod tests {
         repo.insert(trec_full("parent", "todo", None, TaskStatus::Todo))
             .await
             .unwrap();
-        let ok = repo.set_status_for_aggregation("parent", "in_progress");
+        let ok = repo.set_status_for_aggregation("parent", "in_progress").await.unwrap();
         assert!(ok, "应命中写入");
         let after = repo.get_by_id("parent").await.unwrap().unwrap();
         assert_eq!(after.status.as_str(), "in_progress", "status 应被聚合写入更新");

crates/df-storage/src/migrations.rs

@@ -45,7 +45,7 @@ pub fn run(conn: &Connection) -> Result<()> {
     //       什么数据库、Redis 在哪、有没有 MQ"的基础设施上下文。
     // V33 = 审批重启恢复:ai_conversations 加 pending_approvals TEXT 列,持久化挂起审批快照,
     //       重启后从 DB 恢复 pending_approvals 内存态,使待审批不丢。
-    let steps: [(i32, fn(&Connection) -> Result<()>); 35] = [
+    let steps: [(i32, fn(&Connection) -> Result<()>); 36] = [
         (1, migrate_v1),
         (2, migrate_v2),
         (3, migrate_v3),
@@ -81,6 +81,7 @@ pub fn run(conn: &Connection) -> Result<()> {
         (33, migrate_v33),
         (34, migrate_v34),
         (35, migrate_v35),
+        (36, migrate_v36),
     ];
 
     for (version, migrate_fn) in steps {
@@ -1030,6 +1031,90 @@ fn migrate_v35(conn: &Connection) -> Result<()> {
     Ok(())
 }
 
+/// V36:多 Agent 并行执行数据层(ai_plans/ai_subtasks/ai_conflicts 3 新表 +
+/// ai_messages/ai_tool_executions 加 subtask_id 列)。
+/// 设计依据:docs/02-架构设计/专项设计/多Agent并行执行与仲裁合并设计-2026-07-01.md §二
+fn migrate_v36(conn: &Connection) -> Result<()> {
+    // 1. ai_messages 加 subtask_id 列(消息归属子任务,NULL=单 Agent 时期)
+    if !column_exists(conn, "ai_messages", "subtask_id") {
+        conn.execute("ALTER TABLE ai_messages ADD COLUMN subtask_id TEXT", [])?;
+        tracing::info!("v36: ai_messages 加 subtask_id 列");
+    }
+
+    // 2. ai_tool_executions 加 subtask_id 列(工具调用归属子任务)
+    if !column_exists(conn, "ai_tool_executions", "subtask_id") {
+        conn.execute("ALTER TABLE ai_tool_executions ADD COLUMN subtask_id TEXT", [])?;
+        tracing::info!("v36: ai_tool_executions 加 subtask_id 列");
+    }
+
+    // 3. ai_plans 表(Plan 生命周期:用户消息触发→拆解→执行→合并→完成)
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS ai_plans (
+            id              TEXT PRIMARY KEY,
+            conversation_id TEXT NOT NULL,
+            user_message_id TEXT,
+            status          TEXT NOT NULL DEFAULT 'planning',
+            subtask_count   INTEGER NOT NULL DEFAULT 0,
+            created_at      TEXT NOT NULL,
+            completed_at    TEXT
+        )",
+        [],
+    )?;
+    conn.execute(
+        "CREATE INDEX IF NOT EXISTS idx_ai_plans_conv ON ai_plans(conversation_id, created_at)",
+        [],
+    )?;
+
+    // 4. ai_subtasks 表(SubTask 状态 + DAG 层级 + Git worktree 分支)
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS ai_subtasks (
+            id          TEXT PRIMARY KEY,
+            plan_id     TEXT NOT NULL REFERENCES ai_plans(id),
+            persona_id  TEXT,
+            intent      TEXT NOT NULL DEFAULT '',
+            status      TEXT NOT NULL DEFAULT 'pending',
+            layer       INTEGER NOT NULL DEFAULT 0,
+            deps        TEXT,
+            branch      TEXT,
+            created_at  TEXT NOT NULL,
+            completed_at TEXT
+        )",
+        [],
+    )?;
+    conn.execute(
+        "CREATE INDEX IF NOT EXISTS idx_ai_subtasks_plan ON ai_subtasks(plan_id, layer)",
+        [],
+    )?;
+
+    // 5. ai_conflicts 表(合并冲突:同文件路径 + 跨文件语义冲突)
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS ai_conflicts (
+            id            TEXT PRIMARY KEY,
+            plan_id       TEXT NOT NULL REFERENCES ai_plans(id),
+            file_path     TEXT NOT NULL DEFAULT '',
+            conflict_type TEXT NOT NULL DEFAULT 'file',
+            subtask_a     TEXT,
+            subtask_b     TEXT,
+            diff_a        TEXT,
+            diff_b        TEXT,
+            resolution    TEXT NOT NULL DEFAULT 'pending',
+            resolved_by   TEXT,
+            created_at    TEXT NOT NULL,
+            resolved_at   TEXT
+        )",
+        [],
+    )?;
+    conn.execute(
+        "CREATE INDEX IF NOT EXISTS idx_ai_conflicts_plan ON ai_conflicts(plan_id, resolution)",
+        [],
+    )?;
+
+    tracing::info!("v36: 建 ai_plans/ai_subtasks/ai_conflicts 表 + subtask_id 列(多 Agent 并行执行数据层)");
+    conn.execute("INSERT INTO schema_version (version) VALUES (?)", [36])?;
+    tracing::info!("迁移 v36 完成");
+    Ok(())
+}
+
 /// V21 建表 SQL — 消息拆分存储 ai_messages 表
 ///
 /// 与 V9_SQL 中的 ai_messages 镜像(V9 给新库,此 const 给老库 V21 迁移用 IF NOT EXISTS)。

crates/df-storage/src/models.rs

@@ -497,3 +497,62 @@ pub struct ModuleDependencyRecord {
     pub label: Option<String>,
     pub created_at: String,
 }
+
+// ============================================================
+// 多 Agent 并行执行模型 (V36)
+// ============================================================
+
+/// Plan 记录(一次用户消息触发的并行执行计划)
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PlanRecord {
+    pub id: String,
+    pub conversation_id: String,
+    /// 触发 Plan 的用户消息 id
+    pub user_message_id: Option<String>,
+    /// planning / executing / merging / done / error
+    pub status: String,
+    pub subtask_count: i64,
+    pub created_at: String,
+    pub completed_at: Option<String>,
+}
+
+/// SubTask 记录(Plan 拆解出的子任务)
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SubTaskRecord {
+    pub id: String,
+    pub plan_id: String,
+    /// 分配的人设 id(coder/reviewer/architect/tester/analyst)
+    pub persona_id: Option<String>,
+    /// 子任务意图描述
+    pub intent: String,
+    /// pending / running / done / error
+    pub status: String,
+    /// DAG 层级(0 起)
+    pub layer: i64,
+    /// 依赖的 SubTask id 列表(JSON 数组字符串)
+    pub deps: Option<String>,
+    /// Git worktree 分支名(NULL=非 Git 工程降级串行)
+    pub branch: Option<String>,
+    pub created_at: String,
+    pub completed_at: Option<String>,
+}
+
+/// 冲突记录(合并时检测到的文件/语义冲突)
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ConflictRecord {
+    pub id: String,
+    pub plan_id: String,
+    pub file_path: String,
+    /// file(同文件路径) / semantic(编译失败)
+    pub conflict_type: String,
+    pub subtask_a: Option<String>,
+    pub subtask_b: Option<String>,
+    pub diff_a: Option<String>,
+    pub diff_b: Option<String>,
+    /// pending / a / b / merged / manual
+    pub resolution: String,
+    /// reviewer / user
+    pub resolved_by: Option<String>,
+    pub created_at: String,
+    pub resolved_at: Option<String>,
+}