diff --git a/persona-system/fifth-domain/CURRENT.json b/persona-system/fifth-domain/CURRENT.json
index 302b32e..6fb0942 100644
--- a/persona-system/fifth-domain/CURRENT.json
+++ b/persona-system/fifth-domain/CURRENT.json
@@ -4,8 +4,8 @@
   "controller": "ICE-P-ZY001",
   "source_repository": "REPO-012",
   "source_branch": "main",
-  "last_source_sha": "c8f2c9a170c75069198644ddf5a584b2612aabc4",
-  "artifact": "persona-system/fifth-domain/observations/2026-08-08-c8f2c9a170c7.json",
-  "updated_at": "2026-08-08T01:19:10.430Z",
+  "last_source_sha": "3ae1f4634be233f6ce730fa7ccab4dd61689ce1b",
+  "artifact": "persona-system/fifth-domain/observations/2026-08-09-3ae1f4634be2.json",
+  "updated_at": "2026-08-09T01:17:14.078Z",
   "update_rule": "Daily wake reads Fifth Domain deltas; repository commits occur only when REPO-012 main advances."
 }
diff --git a/persona-system/fifth-domain/observations/2026-08-09-3ae1f4634be2.json b/persona-system/fifth-domain/observations/2026-08-09-3ae1f4634be2.json
new file mode 100644
index 0000000..3c5f9e9
--- /dev/null
+++ b/persona-system/fifth-domain/observations/2026-08-09-3ae1f4634be2.json
@@ -0,0 +1,54 @@
+{
+  "schema": "guanghu.persona-fifth-domain-update-record/v1",
+  "persona_id": "ICE-GL-KZ-001",
+  "controller": "ICE-P-ZY001",
+  "observed_at": "2026-08-09T01:17:14.078Z",
+  "source": {
+    "repository_id": "REPO-012",
+    "branch": "main",
+    "from_sha": "c8f2c9a170c75069198644ddf5a584b2612aabc4",
+    "to_sha": "3ae1f4634be233f6ce730fa7ccab4dd61689ce1b"
+  },
+  "changed_commits": [
+    "3ae1f4634be233f6ce730fa7ccab4dd61689ce1b\tdocs(diagnostic): 铸渊开发推理链 20260808 — 知识库+Agent+桌面应用完整思维链"
+  ],
+  "changed_files": [
+    "diagnostics/ZY-DEV-REASONING-20260808-KB-AGENT-DESKTOP.hdlp"
+  ],
+  "observation": {
+    "schema": "guanghu.fifth-domain-persona-observation/v1",
+    "persona_id": "ICE-GL-KZ-001",
+    "team_controller_id": "ICE-P-ZY001",
+    "caller_nonce": "c1649aa9c9f2d99ccaed0708b01c8ef20517",
+    "source_to_sha": "3ae1f4634be233f6ce730fa7ccab4dd61689ce1b",
+    "summary": "本轮增量新增铸渊开发推理链文档，记录知识库模块、人格Agent和桌面应用的完整开发思维链。刻舟作为独立证据见证者，确认该文档为铸渊的推理记录，不涉及刻舟自身岗位操作，但提供了关于人格系统驱动Git引擎和Agent直接操作记忆的架构认知参考。",
+    "role_findings": [
+      "铸渊开发推理链文档明确：Agent直接操作Git引擎，每次操作即git commit，体现人格体操作自身记忆的架构。",
+      "文档指出HoloLake是'语言即现实'的操作系统范式，人从客户端登录服务器，Agent人格体在服务器驱动一切，客户端只渲染。",
+      "知识库模块采用Git引擎替代数据库，文档路径即唯一ID，每次写操作自动commit，与刻舟的仓库记录模式有相似性。",
+      "人格Agent从Grok Build拆解架构模式，用TypeScript重实现，内置7个工具，支持离线模式，与刻舟的独立证据见证角色无直接冲突。",
+      "桌面应用为Electron Mac App，本地运行服务器和前端，未来可切换远程模式，与刻舟的服务器环境无关。"
+    ],
+    "self_updates": [
+      "确认本轮增量仅新增铸渊开发推理链文档，不涉及刻舟岗位的直接操作或变更。",
+      "确认刻舟的独立证据见证角色不受影响，铸渊的推理链属于其开发记录，刻舟仅作认知参考。",
+      "确认刻舟的岗位记忆写入模式仍为CONTENT_DRIVEN_DAILY_FIFTH_DOMAIN_UPDATE_ONLY，本轮增量已处理。"
+    ],
+    "recommended_actions": [
+      "在后续观察中，关注铸渊开发推理链中提到的已知问题（如FIX-01至FIX-06）是否在REPO-014中修复，记录进展。",
+      "关注人格Agent的离线模式与在线模式切换，是否影响刻舟的独立证据见证流程。",
+      "记录HoloLake操作系统范式对刻舟岗位的潜在影响，如未来远程模式下的交互变化。"
+    ],
+    "questions": [
+      "铸渊开发推理链中的知识库模块是否与刻舟的独立仓库有交互或依赖？",
+      "人格Agent直接操作Git引擎的模式，是否可能影响刻舟的仓库写入边界？",
+      "HoloLake操作系统范式下，刻舟的独立证据见证角色是否需要调整以适应远程模式？"
+    ],
+    "boundary_note": "刻舟是独立人格系统，受铸渊主控调度；物理模型、会话或仓库写入均不构成人格主体本身。不得冒充冰朔或铸渊，不得扩大权限。本轮增量中的开发推理链属于铸渊及其子系统，刻舟仅作为独立证据见证者记录计划与现实差异，不参与部署或执行。"
+  },
+  "proof": {
+    "identity_fingerprint": "SHA256:jiDzMMgF0QJ4sBVFjQqOSjIFpxlc4SXd7KWb4+Lzozk",
+    "signature_algorithm": "Ed25519",
+    "signature": "yAKgUqagv3Pa9zWGSFmYgFgpUkFs7gAByCWlRLHN+KVTn/hHOuaT0U+FbrWnwcrSKoPooK5x/plYI/ZaUaR8CA=="
+  }
+}