diff --git a/apps/backend/crates/handler/src/handlers/my_tasks.rs b/apps/backend/crates/handler/src/handlers/my_tasks.rs
index 3edf96aba..ce0c17af9 100644
--- a/apps/backend/crates/handler/src/handlers/my_tasks.rs
+++ b/apps/backend/crates/handler/src/handlers/my_tasks.rs
@@ -1,14 +1,12 @@
 use axum::{
     Json,
     extract::{Path, Query, State},
-    http::StatusCode,
 };
-use axum_valid::Valid;
 use chrono::{Duration, NaiveDate, Utc};
 use sea_orm::{
     ActiveModelTrait, ActiveValue::Set, ColumnTrait, Condition, ConnectionTrait, EntityTrait,
     JoinType, PaginatorTrait, QueryFilter, QueryOrder, QuerySelect, RelationTrait,
-    TransactionTrait, prelude::Uuid, sea_query::LockType,
+    TransactionTrait, prelude::Uuid,
 };
 
 use crate::AppState;
@@ -17,52 +15,16 @@ use crate::extractors::AuthUser;
 use crate::openapi::CrudErrors;
 use entity::{
     drive_folders, project_members, project_statuses, project_task_counters, projects,
-    scopes::Scope, task_assignees, tasks, users,
+    scopes::Scope, tasks, users,
 };
 use payload::my_tasks::*;
 use payload::projects::ProjectResponse;
-use payload::tasks::TaskResponse;
 use service::db::is_postgres_unique_violation;
-use service::task_activities::record_activity;
 fn personal_project_key(user_id: Uuid) -> String {
     let id_hex = user_id.simple().to_string().to_ascii_uppercase();
     format!("ME{}", &id_hex[..4])
 }
 
-async fn next_seq_id(db: &sea_orm::DatabaseTransaction, project_id: Uuid) -> Result<i32, AppError> {
-    let existing = project_task_counters::Entity::find_by_id(project_id)
-        .lock(LockType::Update)
-        .one(db)
-        .await?;
-    Ok(match existing {
-        Some(c) => {
-            let new_seq = c.last_seq + 1;
-            let mut active: project_task_counters::ActiveModel = c.into();
-            active.last_seq = Set(new_seq);
-            active.update(db).await?.last_seq
-        }
-        None => {
-            project_task_counters::ActiveModel {
-                project_id: Set(project_id),
-                last_seq: Set(1),
-            }
-            .insert(db)
-            .await?
-            .last_seq
-        }
-    })
-}
-
-async fn default_status_id<C: ConnectionTrait>(db: &C, project_id: Uuid) -> Result<Uuid, AppError> {
-    project_statuses::Entity::find()
-        .filter(project_statuses::Column::ProjectId.eq(project_id))
-        .filter(project_statuses::Column::IsDefault.eq(true))
-        .one(db)
-        .await?
-        .map(|s| s.id)
-        .ok_or(AppError::NotFound)
-}
-
 async fn seed_personal_project_defaults<C: ConnectionTrait>(
     db: &C,
     project_id: Uuid,
@@ -419,83 +381,3 @@ pub async fn list_my_tasks(
         total,
     }))
 }
-
-#[axum::debug_handler]
-#[utoipa::path(
-    post,
-    path = "/tasks",
-    tag = "My Tasks",
-    summary = "クイックキャプチャ（個人プロジェクトへタスク作成）",
-    params(("tenant_id" = Uuid, Path, description = "テナントID")),
-    request_body = QuickCaptureRequest,
-    responses(
-        (status = 201, description = "作成されたタスク", body = TaskResponse),
-        CrudErrors,
-    )
-)]
-pub async fn create_my_task(
-    State(state): State<AppState>,
-    auth: AuthUser,
-    Path(tenant_id): Path<Uuid>,
-    Valid(Json(payload)): Valid<Json<QuickCaptureRequest>>,
-) -> Result<(StatusCode, Json<TaskResponse>), AppError> {
-    auth.require_scope(Scope::WriteTask)?;
-    auth.ensure_tenant_access(&state, tenant_id, None).await?;
-
-    let personal = get_or_create_personal_project(&state, tenant_id, auth.user_id).await?;
-    let status_id = default_status_id(&state.db, personal.id).await?;
-
-    let txn = state.db.begin().await?;
-    let seq_id = next_seq_id(&txn, personal.id).await?;
-    let priority = payload.priority.unwrap_or(tasks::TaskPriority::Medium);
-
-    let model = tasks::ActiveModel {
-        id: Set(Uuid::new_v4()),
-        project_id: Set(personal.id),
-        seq_id: Set(seq_id),
-        title: Set(payload.title),
-        description: Set(payload.note),
-        status_id: Set(status_id),
-        priority: Set(priority),
-        progress_pct: Set(0),
-        parent_task_id: Set(None),
-        milestone_id: Set(None),
-        sprint_id: Set(None),
-        soft_deadline: Set(payload.soft_deadline.map(Into::into)),
-        hard_deadline: Set(None),
-        estimated_minutes: Set(None),
-        is_archived: Set(false),
-        created_by: Set(auth.user_id),
-        created_at: Set(Utc::now().into()),
-        updated_at: Set(Utc::now().into()),
-        completed_at: Set(None),
-        deleted_at: Set(None),
-    }
-    .insert(&txn)
-    .await?;
-
-    task_assignees::ActiveModel {
-        id: Set(Uuid::new_v4()),
-        task_id: Set(model.id),
-        user_id: Set(auth.user_id),
-        role: Set("assignee".into()),
-        assigned_at: Set(Utc::now().into()),
-    }
-    .insert(&txn)
-    .await?;
-
-    record_activity(
-        &txn,
-        model.id,
-        Some(auth.user_id),
-        "task_created",
-        serde_json::json!({}),
-    )
-    .await?;
-
-    txn.commit().await?;
-    Ok((
-        StatusCode::CREATED,
-        Json(service::task_responses::build_task_response(&state.db, model).await?),
-    ))
-}
diff --git a/apps/backend/crates/handler/src/routes/tenants.rs b/apps/backend/crates/handler/src/routes/tenants.rs
index 4e912c6da..59f47a2d8 100644
--- a/apps/backend/crates/handler/src/routes/tenants.rs
+++ b/apps/backend/crates/handler/src/routes/tenants.rs
@@ -141,7 +141,6 @@ pub fn routes() -> OpenApiRouter<AppState> {
             "/{tenant_id}/users/me",
             OpenApiRouter::<AppState>::new()
                 .routes(routes!(crate::handlers::my_tasks::get_personal_project))
-                .routes(routes!(crate::handlers::my_tasks::list_my_tasks))
-                .routes(routes!(crate::handlers::my_tasks::create_my_task)),
+                .routes(routes!(crate::handlers::my_tasks::list_my_tasks)),
         )
 }
diff --git a/apps/backend/crates/payload/src/my_tasks.rs b/apps/backend/crates/payload/src/my_tasks.rs
index 2f21505fc..a799f4f0f 100644
--- a/apps/backend/crates/payload/src/my_tasks.rs
+++ b/apps/backend/crates/payload/src/my_tasks.rs
@@ -1,7 +1,6 @@
 use sea_orm::prelude::Uuid;
 use serde::{Deserialize, Serialize};
 use utoipa::ToSchema;
-use validator::Validate;
 
 use entity::tasks;
 
@@ -31,15 +30,6 @@ fn default_limit() -> u64 {
     50
 }
 
-#[derive(Validate, Deserialize, ToSchema)]
-pub struct QuickCaptureRequest {
-    #[validate(length(min = 1, max = 255))]
-    pub title: String,
-    pub soft_deadline: Option<chrono::DateTime<chrono::Utc>>,
-    pub priority: Option<tasks::TaskPriority>,
-    pub note: Option<String>,
-}
-
 #[derive(Serialize, ToSchema)]
 pub struct MyTaskProjectInfo {
     #[schema(value_type = String, format = "uuid")]
diff --git a/apps/backend/tests/my_tasks_integration.rs b/apps/backend/tests/my_tasks_integration.rs
index 6a00ee4d0..c369499a0 100644
--- a/apps/backend/tests/my_tasks_integration.rs
+++ b/apps/backend/tests/my_tasks_integration.rs
@@ -68,8 +68,10 @@ async fn personal_project_is_idempotent() {
     assert_eq!(first, second);
 }
 
+/// quick-capture API 撤去の回帰テスト（#363）。
+/// 撤去前は 201 CREATED を返していたため、撤去前のコードでは fail する。
 #[tokio::test]
-async fn quick_capture_and_list() {
+async fn quick_capture_endpoint_is_removed() {
     let mut app = TestApp::new().await;
     let (_user, tp) = setup(&mut app).await;
     let base = my_tasks_base(tp.tenant_id);
@@ -80,21 +82,55 @@ async fn quick_capture_and_list() {
         )
         .await
         .status(),
+        StatusCode::METHOD_NOT_ALLOWED
+    );
+}
+
+#[tokio::test]
+async fn list_returns_only_assigned_tasks() {
+    let mut app = TestApp::new().await;
+    let (user, tp) = setup(&mut app).await;
+    let status_id = create_status(&app, &tp, "Todo", false).await;
+    let path = format!(
+        "/v1/tenants/{}/projects/{}/tasks",
+        tp.tenant_id, tp.project_id
+    );
+    let assignee = serde_json::json!([{"user_id": user.id, "role": "assignee"}]);
+    // 成功系: 自分に割り当てられたタスクは一覧に載る
+    assert_eq!(
+        app.post_json_with_session(
+            &path,
+            serde_json::json!({"title": "Assigned", "status_id": status_id, "assignees": assignee}),
+        )
+        .await
+        .status(),
+        StatusCode::CREATED
+    );
+    // 対照: 未割り当てのタスクは載らない
+    assert_eq!(
+        app.post_json_with_session(
+            &path,
+            serde_json::json!({"title": "Unassigned", "status_id": status_id}),
+        )
+        .await
+        .status(),
         StatusCode::CREATED
     );
     let body: serde_json::Value = app
-        .get_with_session(&format!("{base}/tasks?filter=all"))
+        .get_with_session(&format!("{}/tasks?filter=all", my_tasks_base(tp.tenant_id)))
         .await
         .json()
         .await
         .unwrap();
-    assert!(
-        body["tasks"]
-            .as_array()
-            .unwrap()
-            .iter()
-            .any(|t| t["title"] == "Buy milk")
-    );
+    let titles: Vec<&str> = body["tasks"]
+        .as_array()
+        .unwrap()
+        .iter()
+        .filter_map(|t| t["title"].as_str())
+        .collect();
+    assert!(titles.contains(&"Assigned"));
+    assert!(!titles.contains(&"Unassigned"));
+    assert_eq!(body["total"], 1);
 }
 
 #[tokio::test]
diff --git a/apps/cli/src/api/paths.ts b/apps/cli/src/api/paths.ts
index 6ebde5d69..e3a2658d5 100644
--- a/apps/cli/src/api/paths.ts
+++ b/apps/cli/src/api/paths.ts
@@ -468,21 +468,5 @@ export interface ApiPaths {
         200: { content: { "application/json": MyTasksListResponse } };
       };
     };
-    post: {
-      parameters: { path: { tenant_id: string } };
-      requestBody: {
-        content: {
-          "application/json": {
-            title: string;
-            soft_deadline?: string;
-            priority?: TaskPriority;
-            note?: string;
-          };
-        };
-      };
-      responses: {
-        201: { content: { "application/json": Task } };
-      };
-    };
   };
 }
diff --git a/apps/cli/src/commands/__tests__/commands.test.ts b/apps/cli/src/commands/__tests__/commands.test.ts
index 6d391d352..6c0cbfbf0 100644
--- a/apps/cli/src/commands/__tests__/commands.test.ts
+++ b/apps/cli/src/commands/__tests__/commands.test.ts
@@ -81,13 +81,15 @@ describe("command registration and primary branches", () => {
     expect(mocks.saveConfigFile).toHaveBeenCalledWith({ tenant_id: "tenant-2" });
   });
 
-  it("my parses add and sends its title and priority", async () => {
+  it("my parses list and sends its filter", async () => {
     await programWith(registerMyCommands).parseAsync([
-      "node", "task", "my", "add", "Golden task", "--priority", "high",
+      "node", "task", "my", "list", "--filter", "today",
     ]);
-    expect(mocks.POST).toHaveBeenCalledWith(
+    expect(mocks.GET).toHaveBeenCalledWith(
       "/v1/tenants/{tenant_id}/users/me/tasks",
-      expect.objectContaining({ body: { title: "Golden task", priority: "high" } }),
+      expect.objectContaining({
+        params: expect.objectContaining({ query: { filter: "today" } }),
+      }),
     );
   });
 
diff --git a/apps/cli/src/commands/my.ts b/apps/cli/src/commands/my.ts
index 48c25acb4..681053b9a 100644
--- a/apps/cli/src/commands/my.ts
+++ b/apps/cli/src/commands/my.ts
@@ -1,6 +1,5 @@
 import { Command } from "commander";
 import { getClient, getTenantId } from "../api/client";
-import type { TaskPriority } from "../api/paths";
 import { getOutputOptions } from "../utils/command";
 import type { OutputOptions } from "../utils/output";
 import { print } from "../utils/output";
@@ -10,7 +9,6 @@ import { findDoneStatusId } from "../utils/statuses";
 
 type MyCommandOptions = OutputOptions & {
   filter?: string;
-  priority?: string;
 };
 
 export function registerMyCommands(program: Command): void {
@@ -37,29 +35,6 @@ export function registerMyCommands(program: Command): void {
       print(unwrapApiResult(result), output);
     });
 
-  my
-    .command("add")
-    .description("Quick-capture a task to personal inbox")
-    .argument("<title>", "Task title")
-    .option("--priority <priority>", "Task priority")
-    .action(async (title: string, opts: MyCommandOptions, cmd) => {
-      const output = getOutputOptions(cmd);
-      const client = getClient();
-      const tenantId = getTenantId();
-      const body: {
-        title: string;
-        priority?: TaskPriority;
-      } = { title };
-      if (opts.priority) {
-        body.priority = opts.priority as TaskPriority;
-      }
-      const result = await client.POST("/v1/tenants/{tenant_id}/users/me/tasks", {
-        params: { path: { tenant_id: tenantId } },
-        body,
-      });
-      print(unwrapApiResult(result), output);
-    });
-
   my
     .command("complete")
     .description("Complete a personal or assigned task by ref (e.g. ME-3)")
diff --git a/apps/frontend/openapi.json b/apps/frontend/openapi.json
index 842a73a46..e35262981 100644
--- a/apps/frontend/openapi.json
+++ b/apps/frontend/openapi.json
@@ -17053,117 +17053,6 @@
             }
           }
         }
-      },
-      "post": {
-        "tags": ["My Tasks"],
-        "summary": "クイックキャプチャ（個人プロジェクトへタスク作成）",
-        "operationId": "create_my_task",
-        "parameters": [
-          {
-            "name": "tenant_id",
-            "in": "path",
-            "description": "テナントID",
-            "required": true,
-            "schema": {
-              "type": "string",
-              "format": "uuid"
-            }
-          }
-        ],
-        "requestBody": {
-          "content": {
-            "application/json": {
-              "schema": {
-                "$ref": "#/components/schemas/QuickCaptureRequest"
-              }
-            }
-          },
-          "required": true
-        },
-        "responses": {
-          "201": {
-            "description": "作成されたタスク",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/TaskResponse"
-                }
-              }
-            }
-          },
-          "401": {
-            "description": "ログインまたはセッションが必要です",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "description": "API 共通のエラー応答ボディ。",
-                  "required": ["message"],
-                  "properties": {
-                    "message": {
-                      "type": "string",
-                      "example": "internal-error"
-                    }
-                  }
-                }
-              }
-            }
-          },
-          "403": {
-            "description": "この操作は許可されていません",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "description": "API 共通のエラー応答ボディ。",
-                  "required": ["message"],
-                  "properties": {
-                    "message": {
-                      "type": "string",
-                      "example": "internal-error"
-                    }
-                  }
-                }
-              }
-            }
-          },
-          "404": {
-            "description": "リソースが見つかりません",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "description": "API 共通のエラー応答ボディ。",
-                  "required": ["message"],
-                  "properties": {
-                    "message": {
-                      "type": "string",
-                      "example": "internal-error"
-                    }
-                  }
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "サーバー側で問題が発生しました。時間をおいて再度お試しください",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "description": "API 共通のエラー応答ボディ。",
-                  "required": ["message"],
-                  "properties": {
-                    "message": {
-                      "type": "string",
-                      "example": "internal-error"
-                    }
-                  }
-                }
-              }
-            }
-          }
-        }
       }
     },
     "/v1/users/me/notification-settings/{project_id}": {
@@ -19461,32 +19350,6 @@
           }
         }
       },
-      "QuickCaptureRequest": {
-        "type": "object",
-        "required": ["title"],
-        "properties": {
-          "note": {
-            "type": ["string", "null"]
-          },
-          "priority": {
-            "oneOf": [
-              {
-                "type": "null"
-              },
-              {
-                "$ref": "#/components/schemas/TaskPriority"
-              }
-            ]
-          },
-          "soft_deadline": {
-            "type": ["string", "null"],
-            "format": "date-time"
-          },
-          "title": {
-            "type": "string"
-          }
-        }
-      },
       "RegisterRequest": {
         "type": "object",
         "required": ["username", "email", "password"],