diff --git a/src/adapter/webview/log-webview.ts b/src/adapter/webview/log-webview.ts
index 85c4891..dee8213 100644
--- a/src/adapter/webview/log-webview.ts
+++ b/src/adapter/webview/log-webview.ts
@@ -214,7 +214,8 @@ export class LogWebviewProvider implements vscode.WebviewViewProvider, LogFilter
 			if (raws.length === 0) {
 				return { rows: [], maxLanes: 0, hasMore: false };
 			}
-			// 客户端过滤（mergeMode / date / regex），message 近似取 subject。
+			// 客户端过滤（mergeMode / date / regex / checkpoint），message 近似取 subject。
+			// keepCheckpoint 由 scope 驱动：仅 Checkpointer 视图保留 checkpoint 自动提交，All/Current 剔除。
 			const filterable = raws.map((r) => ({
 				message: r.subject,
 				authorDate: r.authorDate ? new Date(r.authorDate) : undefined,
@@ -222,7 +223,7 @@ export class LogWebviewProvider implements vscode.WebviewViewProvider, LogFilter
 				hash: r.hash,
 				raw: r,
 			}));
-			const survived = applyClientFilters(filterable, toClientFilter(this.filter));
+			const survived = applyClientFilters(filterable, { ...toClientFilter(this.filter), keepCheckpoint: this.scope === 'checkpointer' });
 			const layout = computeGraphLayout(survived.map((s) => ({ hash: s.hash, parents: s.parents })));
 			const hashSet = new Set(survived.map((s) => s.hash));
 			const chips = await this.fetchChips(hashSet);
@@ -380,6 +381,7 @@ body { margin: 0; font-family: var(--vscode-font-family); font-size: var(--vscod
   <span class="seg">
     <button id="scope-all" class="active">All</button>
     <button id="scope-current">Current</button>
+    <button id="scope-checkpointer">Checkpointer</button>
   </span>
   <span class="repo" id="repo"></span>
 </div>
@@ -393,9 +395,11 @@ body { margin: 0; font-family: var(--vscode-font-family); font-size: var(--vscod
 const vscode = acquireVsCodeApi();
 const PALETTE = ${palette};
 const ROW_H = 24, LANE_W = 14, NODE_R = 4, GUTTER = 10, OVERSCAN = 8, LOAD_THRESHOLD = 40;
+/** scope 白名单兜底：仅接受三态，否则回退默认 'all'（兼容未来废弃的持久化值）。 */
+function normalizeScope(v) { return v === 'all' || v === 'current' || v === 'checkpointer' ? v : 'all'; }
 const persisted = vscode.getState() || {};
 let selectedHash = persisted.selectedHash || null;
-let scope = persisted.scope || 'all';
+let scope = normalizeScope(persisted.scope);
 let model = { rows: [], maxLanes: 0, hasMore: false, repoRoot: '' };
 let renderedFirst = -1, renderedLast = -1, fetching = false;
 const viewport = document.getElementById('viewport');
@@ -473,6 +477,7 @@ function render() {
   emptyEl.style.display = total === 0 ? 'block' : 'none';
   document.getElementById('scope-all').classList.toggle('active', scope === 'all');
   document.getElementById('scope-current').classList.toggle('active', scope === 'current');
+  document.getElementById('scope-checkpointer').classList.toggle('active', scope === 'checkpointer');
   if (model.hasMore && !fetching && l >= total - LOAD_THRESHOLD) {
     fetching = true; spinnerEl.style.display = 'block';
     vscode.postMessage({ type: 'log/loadMore', payload: { cursor: total } });
@@ -516,8 +521,10 @@ rowsEl.addEventListener('contextmenu', function (e) {
   e.preventDefault();
   vscode.postMessage({ type: 'log/commitAction', payload: { op: 'menu', hash: r.getAttribute('data-hash') } });
 });
-document.getElementById('scope-all').addEventListener('click', function () { if (scope !== 'all') { scope = 'all'; vscode.setState({ selectedHash: selectedHash, scope: scope }); vscode.postMessage({ type: 'log/setScope', payload: { scope: 'all' } }); } });
-document.getElementById('scope-current').addEventListener('click', function () { if (scope !== 'current') { scope = 'current'; vscode.setState({ selectedHash: selectedHash, scope: scope }); vscode.postMessage({ type: 'log/setScope', payload: { scope: 'current' } }); } });
+function setScope(next) { if (scope !== next) { scope = next; vscode.setState({ selectedHash: selectedHash, scope: scope }); vscode.postMessage({ type: 'log/setScope', payload: { scope: next } }); } }
+document.getElementById('scope-all').addEventListener('click', function () { setScope('all'); });
+document.getElementById('scope-current').addEventListener('click', function () { setScope('current'); });
+document.getElementById('scope-checkpointer').addEventListener('click', function () { setScope('checkpointer'); });
 viewport.addEventListener('scroll', scheduleRender, { passive: true });
 viewport.addEventListener('keydown', function (e) {
   if (e.key === 'ArrowDown') { e.preventDefault(); moveSel(1); }
diff --git a/src/engine/log/log-filter.ts b/src/engine/log/log-filter.ts
index 2734c73..5d6456d 100644
--- a/src/engine/log/log-filter.ts
+++ b/src/engine/log/log-filter.ts
@@ -16,6 +16,12 @@ export interface LogClientFilter {
 	/** 截止日期（含），按 authorDate 过滤。 */
 	readonly dateTo?: Date;
 	readonly messageRegex?: RegExp;
+	/**
+	 * 是否保留 Conductor 等 Agent 工具自动创建的 checkpoint 提交（subject 以 `checkpoint:` 开头，见
+	 * {@link isCheckpointSubject}）。`false` 时剔除；缺省或 `true` 时保留。由 Log 视图 scope 驱动
+	 * （Checkpointer 视图保留完整历史，All/Current 剔除以呈现干净的人类提交历史）。
+	 */
+	readonly keepCheckpoint?: boolean;
 }
 
 /**
@@ -65,9 +71,27 @@ export function safeRegex(pattern: string): RegExp | undefined {
 	}
 }
 
+/**
+ * Conductor 等 Agent 工具自动创建的「状态快照」提交前缀（LangGraph Checkpointer 语义）。
+ * 已知模式：`checkpoint:session-<uuid>-turn-<uuid>-start/end`、`checkpoint:conductor-archive-<uuid>`、
+ * `checkpoint:conductor-getdiff`。锚定 subject 行首、大小写不敏感；集中于此为单一事实源，
+ * adapter / 测试一律引用本常量或谓词，杜绝识别规则分散。
+ */
+export const CHECKPOINT_SUBJECT_RE = /^checkpoint:/i;
+
+/** 判定提交 subject 是否为 checkpoint 自动提交（{@link CHECKPOINT_SUBJECT_RE} 的谓词封装）。 */
+export function isCheckpointSubject(subject: string): boolean {
+	return CHECKPOINT_SUBJECT_RE.test(subject);
+}
+
 /** 对已取回的提交施加客户端过滤（不可变，返回新数组）。 */
 export function applyClientFilters<T extends FilterableCommit>(commits: readonly T[], filter: LogClientFilter): T[] {
 	let result: T[] = [...commits];
+	// checkpoint 剔除置链首：其高密度特性可减少后续 mergeMode/date/regex 的计算量；
+	// 与其他维度同为 AND 语义、可交换，顺序不影响结果正确性。
+	if (filter.keepCheckpoint === false) {
+		result = result.filter((c) => !isCheckpointSubject(c.message));
+	}
 	if (filter.mergeMode === 'merge-only') {
 		result = result.filter((c) => c.parents.length > 1);
 	} else if (filter.mergeMode === 'no-merge') {
diff --git a/src/engine/log/log-query.ts b/src/engine/log/log-query.ts
index 2175127..6134437 100644
--- a/src/engine/log/log-query.ts
+++ b/src/engine/log/log-query.ts
@@ -10,8 +10,15 @@
 import type { LogFilter } from './log-filter';
 import { LOG_GRAPH_FORMAT } from './log-line';
 
-/** 提交范围：`all` = 全部分支（`--all`，IDEA 默认）；`current` = 当前分支（HEAD）。 */
-export type LogScope = 'all' | 'current';
+/**
+ * 提交范围（工具栏互斥单选）：
+ * - `all` = 全分支（`--all`），剔除 checkpoint 自动提交（干净的人类历史，默认）；
+ * - `current` = 当前分支（HEAD），剔除 checkpoint 自动提交；
+ * - `checkpointer` = 全分支（`--all`），保留 checkpoint 自动提交（原始完整视图）。
+ * checkpoint 的保留/剔除由 adapter 层据 scope 注入 `LogClientFilter.keepCheckpoint`，
+ * engine query 层仅据本类型决定 `--all` 分支范围，对 checkpoint 概念无感知（职责单一）。
+ */
+export type LogScope = 'all' | 'current' | 'checkpointer';
 
 /** 分页参数。 */
 export interface LogQueryOptions {
@@ -26,7 +33,7 @@ export interface LogQueryOptions {
  */
 export function buildLogArgs(filter: LogFilter | undefined, scope: LogScope, opts: LogQueryOptions): string[] {
 	const args: string[] = ['--topo-order'];
-	if (scope === 'all') {
+	if (scope === 'all' || scope === 'checkpointer') {
 		args.push('--all');
 	}
 	args.push(`--max-count=${opts.maxCount}`);
diff --git a/tests/unit/log-filter.test.ts b/tests/unit/log-filter.test.ts
index e48ed06..2952075 100644
--- a/tests/unit/log-filter.test.ts
+++ b/tests/unit/log-filter.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { applyClientFilters, safeRegex, type FilterableCommit, type LogClientFilter } from '../../src/engine/log/log-filter';
+import { CHECKPOINT_SUBJECT_RE, applyClientFilters, isCheckpointSubject, safeRegex, type FilterableCommit, type LogClientFilter } from '../../src/engine/log/log-filter';
 
 const D = (iso: string): Date => new Date(iso);
 const C = (message: string, parents: string[], authorDate?: Date): FilterableCommit => ({ message, parents, authorDate });
@@ -11,6 +11,13 @@ const COMMITS: FilterableCommit[] = [
 	C('docs: readme', ['p1', 'p2', 'p3'], D('2026-07-01')),
 ];
 
+/** 含 Conductor 自动 checkpoint 提交的样本（用于 keepCheckpoint 维度测试，与 COMMITS 隔离以保护既有断言）。 */
+const COMMITS_WITH_CKPT: FilterableCommit[] = [
+	...COMMITS,
+	C('checkpoint:session-x-turn-y-start', ['p1'], D('2026-06-05')),
+	C('checkpoint:conductor-archive-uuid', ['p1'], D('2026-06-15')),
+];
+
 describe('log-filter', () => {
 	it('merge-only 仅保留 parents>1', () => {
 		const f: LogClientFilter = { mergeMode: 'merge-only' };
@@ -58,6 +65,44 @@ describe('log-filter', () => {
 	});
 });
 
+describe('isCheckpointSubject / CHECKPOINT_SUBJECT_RE', () => {
+	it('识别 session checkpoint 起/止', () => {
+		expect(isCheckpointSubject('checkpoint:session-abc-turn-def-start')).toBe(true);
+		expect(isCheckpointSubject('checkpoint:session-abc-turn-def-end')).toBe(true);
+	});
+	it('识别 conductor-archive / conductor-getdiff', () => {
+		expect(isCheckpointSubject('checkpoint:conductor-archive-uuid')).toBe(true);
+		expect(isCheckpointSubject('checkpoint:conductor-getdiff')).toBe(true);
+	});
+	it('不误伤非 checkpoint 前缀（含正文出现 checkpoint 字样）', () => {
+		expect(isCheckpointSubject('docs: checkpoint notes')).toBe(false);
+		expect(isCheckpointSubject('feat: add checkpoint api')).toBe(false);
+		expect(isCheckpointSubject('')).toBe(false);
+	});
+	it('大小写不敏感（容错 Agent 工具配置差异）', () => {
+		expect(isCheckpointSubject('Checkpoint:session-x')).toBe(true);
+		expect(CHECKPOINT_SUBJECT_RE.test('CHECKPOINT:foo')).toBe(true);
+	});
+});
+
+describe('applyClientFilters — keepCheckpoint 维度', () => {
+	it('keepCheckpoint=false 剔除 checkpoint 提交（保留正常提交）', () => {
+		const out = applyClientFilters(COMMITS_WITH_CKPT, { keepCheckpoint: false }).map((c) => c.message);
+		expect(out).toEqual(['feat: a', 'merge: branch', 'fix: bug [urgent]', 'docs: readme']);
+	});
+	it('keepCheckpoint=undefined 不过滤 checkpoint（向后兼容）', () => {
+		expect(applyClientFilters(COMMITS_WITH_CKPT, {})).toHaveLength(6);
+	});
+	it('keepCheckpoint=true 保留 checkpoint', () => {
+		expect(applyClientFilters(COMMITS_WITH_CKPT, { keepCheckpoint: true })).toHaveLength(6);
+	});
+	it('组合：keepCheckpoint=false + no-merge + dateFrom（顺序正交）', () => {
+		const f: LogClientFilter = { keepCheckpoint: false, mergeMode: 'no-merge', dateFrom: D('2026-06-15') };
+		// 剔 checkpoint(2 条) + 剔 merge(docs) + 剔早于 06-15(feat:a) → 仅 fix: bug [urgent]
+		expect(applyClientFilters(COMMITS_WITH_CKPT, f).map((c) => c.message)).toEqual(['fix: bug [urgent]']);
+	});
+});
+
 describe('safeRegex', () => {
 	it('合法模式返回 RegExp', () => {
 		expect(safeRegex('feat')).toEqual(/feat/);
diff --git a/tests/unit/log-query.test.ts b/tests/unit/log-query.test.ts
index 90e02fc..5a8407b 100644
--- a/tests/unit/log-query.test.ts
+++ b/tests/unit/log-query.test.ts
@@ -14,6 +14,10 @@ describe('buildLogArgs — 顺序与必选项', () => {
 		expect(buildLogArgs(noFilter, 'current', { maxCount: 300 })).not.toContain('--all');
 	});
 
+	it('scope=checkpointer 与 all 同为全分支（含 --all）', () => {
+		expect(buildLogArgs(noFilter, 'checkpointer', { maxCount: 300 })).toContain('--all');
+	});
+
 	it('max-count 与 skip', () => {
 		expect(buildLogArgs(noFilter, 'all', { maxCount: 500 })).toContain('--max-count=500');
 		expect(buildLogArgs(noFilter, 'all', { maxCount: 500, skip: 500 })).toContain('--skip=500');