fix: build task dependencies in two phases

web/public/course-assets/s10_task_system/task-system-overview.en.svg

@@ -16,7 +16,7 @@
   <!-- Title -->
   <rect x="0" y="0" width="760" height="44" fill="url(#header)" rx="8"/>
   <rect x="0" y="36" width="760" height="8" fill="url(#header)"/>
-  <text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">Task System — 5 Task Tools + .tasks/ Persistence + blockedBy Dependencies</text>
+  <text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">Task System — 6 Task Tools + .tasks/ Persistence + blockedBy Dependencies</text>
 
   <!-- Legend -->
   <rect x="40" y="56" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
@@ -46,7 +46,7 @@
   <rect x="393" y="80" width="210" height="64" rx="8" fill="#f0f4ff" stroke="#2563eb" stroke-width="1.5"/>
   <text x="498" y="98" fill="#1e3a5f" font-size="10" font-weight="600" text-anchor="middle">Hooks + TOOL_HANDLERS</text>
   <text x="408" y="114" fill="#2563eb" font-size="9">bash · read · write · edit · glob</text>
-  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · list_tasks</text>
+  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · update_task · list_tasks</text>
   <text x="408" y="140" fill="#0d9488" font-size="9" font-weight="600">get_task · claim_task · complete_task</text>
 
   <!-- Loop back -->
@@ -61,13 +61,13 @@
 
   <!-- Arrow: tools → .tasks/ -->
   <path d="M 440 144 L 440 165 L 250 165 L 250 185" fill="none" stroke="#0d9488" stroke-width="1.5" marker-end="url(#arrow-teal)"/>
-  <text x="320" y="178" fill="#0d9488" font-size="9">create / save / read</text>
+  <text x="300" y="178" fill="#0d9488" font-size="9">create → ID / update edges / read</text>
 
   <!-- ===== Lifecycle (teal) ===== -->
   <rect x="390" y="185" width="330" height="76" rx="8" fill="#f0fdfa" stroke="#0d9488" stroke-width="2"/>
   <text x="555" y="205" fill="#134e4a" font-size="11" font-weight="700" text-anchor="middle">Dependency Check + Lifecycle</text>
-  <text x="408" y="222" fill="#0d9488" font-size="9">can_start: all blockedBy completed?</text>
-  <text x="408" y="238" fill="#0d9488" font-size="9">claim_task → owner = agent, pending → in_progress</text>
+  <text x="408" y="222" fill="#0d9488" font-size="9">create_task → runtime ID; update_task → blockedBy</text>
+  <text x="408" y="238" fill="#0d9488" font-size="9">can_start + claim: all dependencies completed?</text>
   <text x="408" y="252" fill="#0d9488" font-size="9">complete_task → completed + unblock downstream</text>
 
   <!-- ===== State machine ===== -->
@@ -90,5 +90,5 @@
   <rect x="60" y="366" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
   <text x="80" y="376" fill="#475569" font-size="10">Base loop: model call + Permission/Hooks + tool dispatch + tool_result</text>
   <rect x="60" y="384" width="12" height="10" rx="2" fill="#f0fdfa" stroke="#0d9488" stroke-width="1"/>
-  <text x="80" y="394" fill="#475569" font-size="10">s10 New: Task dataclass + 5 tools + .tasks/ persistence + blockedBy dependency graph</text>
+  <text x="80" y="394" fill="#475569" font-size="10">s10 New: Task dataclass + 6 tools + .tasks/ persistence + blockedBy dependency graph</text>
 </svg>

web/public/course-assets/s10_task_system/task-system-overview.ja.svg

@@ -16,7 +16,7 @@
   <!-- タイトル -->
   <rect x="0" y="0" width="760" height="44" fill="url(#header)" rx="8"/>
   <rect x="0" y="36" width="760" height="8" fill="url(#header)"/>
-  <text x="380" y="28" fill="#fff" font-size="14" font-weight="700" text-anchor="middle">Task System — 5 つのタスクツール + .tasks/ 永続化 + blockedBy 依存</text>
+  <text x="380" y="28" fill="#fff" font-size="14" font-weight="700" text-anchor="middle">Task System — 6 つのタスクツール + .tasks/ 永続化 + blockedBy 依存</text>
 
   <!-- 凡例 -->
   <rect x="40" y="56" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
@@ -46,7 +46,7 @@
   <rect x="393" y="80" width="210" height="64" rx="8" fill="#f0f4ff" stroke="#2563eb" stroke-width="1.5"/>
   <text x="498" y="98" fill="#1e3a5f" font-size="10" font-weight="600" text-anchor="middle">Hooks + TOOL_HANDLERS</text>
   <text x="408" y="114" fill="#2563eb" font-size="9">bash · read · write · edit · glob</text>
-  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · list_tasks</text>
+  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · update_task · list_tasks</text>
   <text x="408" y="140" fill="#0d9488" font-size="9" font-weight="600">get_task · claim_task · complete_task</text>
 
   <!-- ループバック -->
@@ -61,13 +61,13 @@
 
   <!-- 矢印: tools → .tasks/ -->
   <path d="M 440 144 L 440 165 L 250 165 L 250 185" fill="none" stroke="#0d9488" stroke-width="1.5" marker-end="url(#arrow-teal)"/>
-  <text x="320" y="178" fill="#0d9488" font-size="9">create / save / read</text>
+  <text x="300" y="178" fill="#0d9488" font-size="9">create → ID / update edges / read</text>
 
   <!-- ===== ライフサイクル（ティール） ===== -->
   <rect x="390" y="185" width="330" height="76" rx="8" fill="#f0fdfa" stroke="#0d9488" stroke-width="2"/>
   <text x="555" y="205" fill="#134e4a" font-size="11" font-weight="700" text-anchor="middle">依存チェック + ライフサイクル</text>
-  <text x="408" y="222" fill="#0d9488" font-size="9">can_start: blockedBy がすべて completed?</text>
-  <text x="408" y="238" fill="#0d9488" font-size="9">claim_task → owner = agent, pending → in_progress</text>
+  <text x="408" y="222" fill="#0d9488" font-size="9">create_task → 実行時 ID；update_task → blockedBy</text>
+  <text x="408" y="238" fill="#0d9488" font-size="9">can_start + claim：依存がすべて completed?</text>
   <text x="408" y="252" fill="#0d9488" font-size="9">complete_task → completed + 下流をアンロック</text>
 
   <!-- ===== 状態マシン ===== -->
@@ -90,5 +90,5 @@
   <rect x="60" y="366" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
   <text x="80" y="376" fill="#475569" font-size="10">基本ループ：モデル呼び出し + Permission/Hooks + ツール分配 + tool_result</text>
   <rect x="60" y="384" width="12" height="10" rx="2" fill="#f0fdfa" stroke="#0d9488" stroke-width="1"/>
-  <text x="80" y="394" fill="#475569" font-size="10">s10 新規：Task dataclass + 5 ツール + .tasks/ 永続化 + blockedBy 依存グラフ</text>
+  <text x="80" y="394" fill="#475569" font-size="10">s10 新規：Task dataclass + 6 ツール + .tasks/ 永続化 + blockedBy 依存グラフ</text>
 </svg>

web/public/course-assets/s10_task_system/task-system-overview.svg

@@ -16,7 +16,7 @@
   <!-- Title -->
   <rect x="0" y="0" width="760" height="44" fill="url(#header)" rx="8"/>
   <rect x="0" y="36" width="760" height="8" fill="url(#header)"/>
-  <text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">Task System — 5 个任务工具 + .tasks/ 持久化 + blockedBy 依赖</text>
+  <text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">Task System — 6 个任务工具 + .tasks/ 持久化 + blockedBy 依赖</text>
 
   <!-- Legend -->
   <rect x="40" y="56" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
@@ -46,7 +46,7 @@
   <rect x="393" y="80" width="210" height="64" rx="8" fill="#f0f4ff" stroke="#2563eb" stroke-width="1.5"/>
   <text x="498" y="98" fill="#1e3a5f" font-size="10" font-weight="600" text-anchor="middle">Hooks + TOOL_HANDLERS</text>
   <text x="408" y="114" fill="#2563eb" font-size="9">bash · read · write · edit · glob</text>
-  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · list_tasks</text>
+  <text x="408" y="128" fill="#0d9488" font-size="9" font-weight="600">create_task · update_task · list_tasks</text>
   <text x="408" y="140" fill="#0d9488" font-size="9" font-weight="600">get_task · claim_task · complete_task</text>
 
   <!-- Loop back -->
@@ -61,13 +61,13 @@
 
   <!-- Arrow: tools → .tasks/ -->
   <path d="M 440 144 L 440 165 L 250 165 L 250 185" fill="none" stroke="#0d9488" stroke-width="1.5" marker-end="url(#arrow-teal)"/>
-  <text x="320" y="178" fill="#0d9488" font-size="9">create / save / read</text>
+  <text x="300" y="178" fill="#0d9488" font-size="9">create → ID / update edges / read</text>
 
   <!-- ===== Lifecycle (teal) ===== -->
   <rect x="390" y="185" width="330" height="76" rx="8" fill="#f0fdfa" stroke="#0d9488" stroke-width="2"/>
   <text x="555" y="205" fill="#134e4a" font-size="11" font-weight="700" text-anchor="middle">依赖检查 + 生命周期</text>
-  <text x="408" y="222" fill="#0d9488" font-size="9">can_start: blockedBy 全部 completed?</text>
-  <text x="408" y="238" fill="#0d9488" font-size="9">claim_task → owner = agent, pending → in_progress</text>
+  <text x="408" y="222" fill="#0d9488" font-size="9">create_task → 运行时 ID；update_task → blockedBy</text>
+  <text x="408" y="238" fill="#0d9488" font-size="9">can_start + claim：依赖全部 completed?</text>
   <text x="408" y="252" fill="#0d9488" font-size="9">complete_task → completed + 解锁下游</text>
 
   <!-- ===== State machine ===== -->
@@ -90,5 +90,5 @@
   <rect x="60" y="366" width="12" height="10" rx="2" fill="#f0f4ff" stroke="#2563eb" stroke-width="1"/>
   <text x="80" y="376" fill="#475569" font-size="10">基础循环：模型调用 + Permission/Hooks + 工具分发 + tool_result</text>
   <rect x="60" y="384" width="12" height="10" rx="2" fill="#f0fdfa" stroke="#0d9488" stroke-width="1"/>
-  <text x="80" y="394" fill="#475569" font-size="10">s10 新增：Task dataclass + 5 个工具 + .tasks/ 持久化 + blockedBy 依赖图</text>
+  <text x="80" y="394" fill="#475569" font-size="10">s10 新增：Task dataclass + 6 个工具 + .tasks/ 持久化 + blockedBy 依赖图</text>
 </svg>

web/public/course-assets/s15_integrated_harness/system-architecture.en.svg

@@ -74,7 +74,7 @@
   <text x="718" y="407" fill="#0f766e" font-size="9">s14 MCP tools</text>
   <path d="M 790 318 L 790 188" fill="none" stroke="#0d9488" stroke-width="1.3" marker-end="url(#arrow-green)" stroke-dasharray="5,3"/>
   <rect x="70" y="462" width="780" height="112" rx="8" fill="#f8fafc" stroke="#cbd5e1" stroke-width="1.2"/>
-  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 25 builtins + dynamic mcp__server__tool</text>
+  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 26 builtins + dynamic mcp__server__tool</text>
   <text x="95" y="512" fill="#334155" font-size="9">file/shell: bash · read · write · edit · glob</text>
   <text x="95" y="530" fill="#334155" font-size="9">single-agent: todo_write · task · load_skill · compact</text>
   <text x="95" y="548" fill="#334155" font-size="9">durable work: task tools · cron tools</text>

web/public/course-assets/s15_integrated_harness/system-architecture.ja.svg

@@ -74,7 +74,7 @@
   <text x="718" y="407" fill="#0f766e" font-size="9">s14 MCP tools</text>
   <path d="M 790 318 L 790 188" fill="none" stroke="#0d9488" stroke-width="1.3" marker-end="url(#arrow-green)" stroke-dasharray="5,3"/>
   <rect x="70" y="462" width="780" height="112" rx="8" fill="#f8fafc" stroke="#cbd5e1" stroke-width="1.2"/>
-  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 25 builtins + dynamic mcp__server__tool</text>
+  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 26 builtins + dynamic mcp__server__tool</text>
   <text x="95" y="512" fill="#334155" font-size="9">file/shell: bash · read · write · edit · glob</text>
   <text x="95" y="530" fill="#334155" font-size="9">single-agent: todo_write · task · load_skill · compact</text>
   <text x="95" y="548" fill="#334155" font-size="9">durable work: task tools · cron tools</text>

web/public/course-assets/s15_integrated_harness/system-architecture.svg

@@ -94,10 +94,10 @@
 
   <!-- Tool pool -->
   <rect x="70" y="462" width="780" height="112" rx="8" fill="#f8fafc" stroke="#cbd5e1" stroke-width="1.2"/>
-  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 25 builtins + dynamic mcp__server__tool</text>
+  <text x="460" y="487" text-anchor="middle" fill="#1e293b" font-size="12" font-weight="700">TOOL POOL: 26 builtins + dynamic mcp__server__tool</text>
   <text x="95" y="512" fill="#334155" font-size="9">file/shell: bash · read · write · edit · glob</text>
   <text x="95" y="530" fill="#334155" font-size="9">single-agent: todo_write · task · load_skill · compact</text>
-  <text x="95" y="548" fill="#334155" font-size="9">durable work: create/list/get/claim/complete_task · schedule/list/cancel_cron</text>
+  <text x="95" y="548" fill="#334155" font-size="9">durable work: create/update/list/get/claim/complete_task · schedule/list/cancel_cron</text>
   <text x="510" y="512" fill="#334155" font-size="9">team: spawn_teammate · send_message · typed protocols</text>
   <text x="510" y="530" fill="#334155" font-size="9">protocol: request_shutdown · request_plan · review_plan</text>
   <text x="510" y="548" fill="#334155" font-size="9">workdir/plugin: create_worktree · connect_mcp</text>