diff --git a/.planning/REQUIREMENTS.md b/.planning/REQUIREMENTS.md
index 25511b1..7682eeb 100644
--- a/.planning/REQUIREMENTS.md
+++ b/.planning/REQUIREMENTS.md
@@ -22,9 +22,9 @@
 
 ### 内容完整性保护 (COMP)
 
-- [ ] **COMP-01**: 分段不会在句子中间截断内容
-- [ ] **COMP-02**: 分段不会破坏论点的完整性（如前提-结论结构）
-- [ ] **COMP-03**: 并列结构（首先、其次、最后）不会被错误拆分
+- [x] **COMP-01**: 分段不会在句子中间截断内容
+- [x] **COMP-02**: 分段不会破坏论点的完整性（如前提-结论结构）
+- [x] **COMP-03**: 并列结构（首先、其次、最后）不会被错误拆分
 
 ### 主题标题生成 (TITLE)
 
@@ -103,9 +103,9 @@
 | BOUND-02 | Phase 13 | Pending |
 | BOUND-03 | Phase 13 | Pending |
 | BOUND-04 | Phase 13 | Pending |
-| COMP-01 | Phase 13 | Pending |
-| COMP-02 | Phase 13 | Pending |
-| COMP-03 | Phase 13 | Pending |
+| COMP-01 | Phase 13 | Complete |
+| COMP-02 | Phase 13 | Complete |
+| COMP-03 | Phase 13 | Complete |
 | TITLE-01 | Phase 13 | Complete |
 | TITLE-02 | Phase 13 | Complete |
 | TITLE-03 | Phase 13 | Complete |
diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index d6502f7..8b92b79 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -219,7 +219,7 @@ Phases execute in numeric order: 1 → 2 → ... → 12 → 13 → 14 → 15
 | 10. Proxy Pool | v1.3 | 2/2 | Complete | 2026-03-18 |
 | 11. Stealth Fingerprinting | v1.4 | 2/2 | Complete | 2026-03-18 |
 | 12. SRT 简化处理器 | v1.5 | 2/2 | Complete | 2026-03-21 |
-| 13. 核心 LLM 分段功能 | 2/7 | In Progress|  | - |
+| 13. 核心 LLM 分段功能 | 3/7 | In Progress|  | - |
 | 14. 鲁棒性与成本控制 | v1.6 | 0/0 | Not started | - |
 | 15. 输出优化与兼容性 | v1.6 | 0/0 | Not started | - |
 
diff --git a/.planning/STATE.md b/.planning/STATE.md
index d7189dd..556ffa6 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.4
 milestone_name: Zhihu Anti-Crawler
 status: executing
-stopped_at: Completed 13-05 中文句边界检测
-last_updated: "2026-03-21T16:26:15.430Z"
+stopped_at: Completed 13-03-PLAN.md
+last_updated: "2026-03-21T16:26:42.744Z"
 last_activity: 2026-03-22 — Phase 13 plan created (7 plans)
 progress:
   total_phases: 15
   completed_phases: 10
   total_plans: 38
-  completed_plans: 32
+  completed_plans: 33
   percent: 0
 ---
 
@@ -71,6 +71,8 @@ v1.6 Phase 13 decisions (from 13-CONTEXT.md):
 - **现有 SemanticSegmenter**: 完全替代 — 新代码完全替代旧代码
 - **SRTProcessor 集成**: 配置开关控制 — `enable_semantic_segmentation` 参数
 - **Pydantic Schema 位置**: `semantic_engine.py` 内
+- [Phase 13]: 确认 semantic_engine.py 已包含内容完整性保护指令（在之前的计划中实现）
+- [Phase 13]: 遵守用户决策：不添加并列结构特殊处理指令
 
 ### Technical Context
 
@@ -114,11 +116,12 @@ None.
 |-------|------|----------|-------|-------|------|
 | 13 | 04 | 140s (2min) | 1 | 2 | 2026-03-22 |
 | Phase 13 P05 | 2 | 1 tasks | 2 files |
+| Phase 13 P03 | 5min | 1 tasks | 1 files |
 
 ## Session Continuity
 
-Last session: 2026-03-21T16:26:15.429Z
-Stopped at: Completed 13-05 中文句边界检测
+Last session: 2026-03-21T16:26:42.742Z
+Stopped at: Completed 13-03-PLAN.md
 Resume file: None
 
 **Next step:** Continue with Phase 13 remaining plans (01-03, 05-07)
diff --git a/.planning/phases/13-llm/13-03-SUMMARY.md b/.planning/phases/13-llm/13-03-SUMMARY.md
new file mode 100644
index 0000000..0fdfeb0
--- /dev/null
+++ b/.planning/phases/13-llm/13-03-SUMMARY.md
@@ -0,0 +1,110 @@
+---
+phase: 13-llm
+plan: 03
+subsystem: testing
+tags: [tdd, content-completeness, sentence-boundary, argument-completeness, parallel-structure, prompt-engineering]
+
+# Dependency graph
+requires:
+  - phase: 13-llm
+    plan: 01
+    provides: [SemanticSegmentationEngine class, VideoSegment model, SegmentationResult model]
+provides:
+  - 内容完整性保护测试覆盖（COMP-01, COMP-02, COMP-03）
+  - 验证 SEGMENTATION_PROMPT 包含句边界和论点完整性指令
+  - 确认不包含并列结构特殊处理（符合用户决策）
+affects: [13-llm-06, 13-llm-07]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [TDD testing pattern, mock AI client for LLM testing, regex validation for sentence boundaries]
+
+key-files:
+  created: []
+  modified:
+    - tests/test_semantic_engine.py
+
+key-decisions:
+  - "确认 semantic_engine.py 已包含内容完整性保护指令（在之前的计划中实现）"
+  - "遵守用户决策：不添加并列结构特殊处理指令"
+
+patterns-established:
+  - "TDD 模式：先写测试验证行为，再实现功能"
+  - "Mock AI Client 模式：使用 Mock 对象模拟 LLM 响应，避免真实 API 调用"
+  - "Prompt 验证模式：通过检查 Prompt 内容确保指令完整性"
+
+requirements-completed: [COMP-01, COMP-02, COMP-03]
+
+# Metrics
+duration: 5min
+completed: 2026-03-22
+---
+
+# Phase 13: Plan 03 - 内容完整性保护 Summary
+
+**通过 Prompt 约束确保分段不破坏句子和论点完整性，使用纯 Prompt 方式不进行代码后处理**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-03-22T00:23:04Z
+- **Completed:** 2026-03-22T00:28:00Z
+- **Tasks:** 1
+- **Files modified:** 1
+
+## Accomplishments
+
+- 添加内容完整性保护测试（3 个测试类，6 个测试方法）
+- 验证 SEGMENTATION_PROMPT 包含所有必需的完整性保护指令
+- 确认遵守用户决策：不包含并列结构特殊处理
+- 所有 29 个测试通过（包括新增的 6 个测试）
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: 添加内容完整性保护测试** - `adc1aa3` (test)
+
+**Plan metadata:** (will be added in final commit)
+
+_Note: TDD tasks may have multiple commits (test → feat → refactor)_
+
+## Files Created/Modified
+
+- `tests/test_semantic_engine.py` - 添加内容完整性保护测试
+  - TestSentenceBoundaryProtection (COMP-01): 句边界保护测试
+  - TestArgumentCompleteness (COMP-02): 论点完整性保护测试
+  - TestParallelStructurePreservation (COMP-03): 并列结构保护测试
+
+## Decisions Made
+
+None - 功能已在之前的计划中实现，本次仅添加测试验证
+
+**确认的实现细节：**
+- 句边界保护：列举所有中文句末标点（。？！……）
+- 论点完整性：明确要求不在前提-结论结构中间截断
+- 并列结构：不特别指定，让 LLM 自然判断（符合用户决策）
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- 内容完整性保护功能已实现并测试通过
+- 语义分段引擎的 Prompt 指令完整
+- 准备进入 Plan 06（可扩展策略架构）和 Plan 07（SRTProcessor 集成）
+
+---
+*Phase: 13-llm*
+*Plan: 03*
+*Completed: 2026-03-22*