diff --git a/README.md b/README.md
index a2a9ace..dbdfaac 100644
--- a/README.md
+++ b/README.md
@@ -231,6 +231,14 @@ As long as you have an openai-like endpoint, it should work.
 - `/config` - Open configuration panel
 - `/cost` - Show token usage and costs
 - `/clear` - Clear conversation history
+- `/compact-threshold` - View or set auto-compact threshold ratio (e.g. `/compact-threshold 0.85` or `/compact-threshold 85%`)
+
+  | Value | Effect | Use Case |
+  |-------|--------|----------|
+  | 0.80 | Compress earlier, more conservative | Small context models (e.g. deepseek 131k) |
+  | 0.85 | Balanced | Medium context models |
+  | 0.90 | Default | Large context models (e.g. Claude 200k) |
+
 - `/init` - Initialize project context
 
 ## Multi-Model Intelligent Collaboration
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 45a7a27..33111d4 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -141,6 +141,14 @@ Kode 同时使用 `~/.kode` 目录（存放额外数据，如内存文件）和
 - `/config` - 打开配置面板
 - `/cost` - 显示 token 使用量和成本
 - `/clear` - 清除对话历史
+- `/compact-threshold` - 查看或设置自动压缩阈值比例（如 `/compact-threshold 0.85` 或 `/compact-threshold 85%`）
+
+  | 值 | 效果 | 适用场景 |
+  |----|------|----------|
+  | 0.80 | 更早压缩，更保守 | 小上下文模型（如 deepseek 131k） |
+  | 0.85 | 平衡 | 中等上下文模型 |
+  | 0.90 | 默认 | 大上下文模型（如 Claude 200k） |
+
 - `/init` - 初始化项目上下文
 
 ## 多模型智能协同
diff --git a/src/commands/compact-threshold.ts b/src/commands/compact-threshold.ts
new file mode 100644
index 0000000..8904ec3
--- /dev/null
+++ b/src/commands/compact-threshold.ts
@@ -0,0 +1,91 @@
+import chalk from 'chalk'
+import type { Command } from '@commands'
+import { getGlobalConfig, saveGlobalConfig } from '@utils/config'
+import {
+  AUTO_COMPACT_THRESHOLD_RATIO,
+  getAutoCompactThresholdRatio,
+  isValidAutoCompactThresholdRatio,
+} from '@utils/session/autoCompactThreshold'
+
+const HELP_ARGS = new Set(['help', '-h', '--help', '?'])
+const RESET_ARGS = new Set(['reset', 'default'])
+
+function parseThresholdInput(raw: string): number | null {
+  const trimmed = raw.trim()
+  if (!trimmed) return null
+
+  let valueText = trimmed
+  let isPercent = false
+
+  if (valueText.endsWith('%')) {
+    isPercent = true
+    valueText = valueText.slice(0, -1).trim()
+  }
+
+  if (!valueText) return null
+
+  const value = Number(valueText)
+  if (!Number.isFinite(value)) return null
+
+  let ratio = value
+  // Treat bare values >1 as percentages (85 => 0.85) while still allowing ratios like 0.85.
+  if (isPercent || (value > 1 && value <= 100)) {
+    ratio = value / 100
+  }
+
+  return isValidAutoCompactThresholdRatio(ratio) ? ratio : null
+}
+
+function formatRatio(ratio: number): string {
+  const percent = Math.round(ratio * 100)
+  return `${ratio} (${percent}%)`
+}
+
+const compactThreshold = {
+  type: 'local',
+  name: 'compact-threshold',
+  description: 'View or set the auto-compact threshold ratio',
+  isEnabled: true,
+  isHidden: false,
+  argumentHint: '[ratio]',
+  userFacingName() {
+    return 'compact-threshold'
+  },
+  async call(args) {
+    const raw = args.trim()
+
+    if (!raw || HELP_ARGS.has(raw)) {
+      const configured = getGlobalConfig().autoCompactThreshold
+      const isCustom = isValidAutoCompactThresholdRatio(configured)
+      const ratio = getAutoCompactThresholdRatio()
+      const defaultNote = isCustom ? '' : ' (default)'
+
+      return [
+        `Auto-compact threshold: ${formatRatio(ratio)}${defaultNote}`,
+        'Usage: /compact-threshold 0.85',
+        'Tip: You can also use percentages, e.g. /compact-threshold 85%',
+      ].join('\n')
+    }
+
+    if (RESET_ARGS.has(raw)) {
+      const nextConfig = { ...getGlobalConfig() }
+      delete nextConfig.autoCompactThreshold
+      saveGlobalConfig(nextConfig)
+      return `Auto-compact threshold reset to default (${AUTO_COMPACT_THRESHOLD_RATIO}).`
+    }
+
+    const parsed = parseThresholdInput(raw)
+    if (!parsed) {
+      return [
+        `Invalid threshold: ${chalk.bold(raw)}`,
+        'Provide a ratio greater than 0 and less than 1 (e.g. 0.85 or 85%).',
+      ].join('\n')
+    }
+
+    const config = getGlobalConfig()
+    saveGlobalConfig({ ...config, autoCompactThreshold: parsed })
+    return `Auto-compact threshold set to ${formatRatio(parsed)}.`
+  },
+} satisfies Command
+
+export default compactThreshold
diff --git a/src/commands/index.ts b/src/commands/index.ts
index d9f9c94..4b33995 100644
--- a/src/commands/index.ts
+++ b/src/commands/index.ts
@@ -2,6 +2,7 @@ import React from 'react'
 import bug from './bug'
 import clear from './clear'
 import compact from './compact'
+import compactThreshold from './compact-threshold'
 import config from './config'
 import cost from './cost'
 import ctxViz from './ctx-viz'
@@ -92,6 +93,7 @@ const COMMANDS = memoize((): Command[] => [
   agents,
   clear,
   compact,
+  compactThreshold,
   config,
   cost,
   doctor,
diff --git a/src/core/config/schema.ts b/src/core/config/schema.ts
index ba0b28b..c593ec4 100644
--- a/src/core/config/schema.ts
+++ b/src/core/config/schema.ts
@@ -165,6 +165,7 @@ export type GlobalConfig = {
   }
   primaryProvider?: ProviderType
   maxTokens?: number
+  autoCompactThreshold?: number
   hasAcknowledgedCostThreshold?: boolean
   oauthAccount?: AccountInfo
   proxy?: string
@@ -187,6 +188,7 @@ export const GLOBAL_CONFIG_KEYS = [
   'primaryProvider',
   'preferredNotifChannel',
   'maxTokens',
+  'autoCompactThreshold',
 ] as const
 
 export type GlobalConfigKey = (typeof GLOBAL_CONFIG_KEYS)[number]
@@ -214,4 +216,3 @@ export type ProjectMcpServerDefinitions = {
   mcpJsonPath: string
   mcprcPath: string
 }
-
diff --git a/src/utils/session/autoCompactCore.ts b/src/utils/session/autoCompactCore.ts
index 8cfb77f..bc6c311 100644
--- a/src/utils/session/autoCompactCore.ts
+++ b/src/utils/session/autoCompactCore.ts
@@ -13,7 +13,6 @@ import { getModelManager } from '@utils/model'
 import { debug as debugLogger } from '@utils/log/debugLogger'
 import { logError } from '@utils/log'
 import {
-  AUTO_COMPACT_THRESHOLD_RATIO,
   calculateAutoCompactThresholds,
 } from './autoCompactThreshold'
 
@@ -63,11 +62,7 @@ Focus on information essential for continuing the conversation effectively, incl
 
 async function calculateThresholds(tokenCount: number) {
   const contextLimit = await getMainConversationContextLimit()
-  return calculateAutoCompactThresholds(
-    tokenCount,
-    contextLimit,
-    AUTO_COMPACT_THRESHOLD_RATIO,
-  )
+  return calculateAutoCompactThresholds(tokenCount, contextLimit)
 }
 
 async function shouldAutoCompact(messages: Message[]): Promise<boolean> {
diff --git a/src/utils/session/autoCompactThreshold.ts b/src/utils/session/autoCompactThreshold.ts
index 1107fda..4271f1a 100644
--- a/src/utils/session/autoCompactThreshold.ts
+++ b/src/utils/session/autoCompactThreshold.ts
@@ -1,9 +1,30 @@
+import { getGlobalConfig } from '@utils/config'
+
 export const AUTO_COMPACT_THRESHOLD_RATIO = 0.9
 
+export function isValidAutoCompactThresholdRatio(
+  value: unknown,
+): value is number {
+  return (
+    typeof value === 'number' &&
+    Number.isFinite(value) &&
+    value > 0 &&
+    value < 1
+  )
+}
+
+export function getAutoCompactThresholdRatio(): number {
+  const config = getGlobalConfig()
+  if (isValidAutoCompactThresholdRatio(config.autoCompactThreshold)) {
+    return config.autoCompactThreshold
+  }
+  return AUTO_COMPACT_THRESHOLD_RATIO
+}
+
 export function calculateAutoCompactThresholds(
   tokenCount: number,
   contextLimit: number,
-  ratio: number = AUTO_COMPACT_THRESHOLD_RATIO,
+  ratio: number = getAutoCompactThresholdRatio(),
 ): {
   isAboveAutoCompactThreshold: boolean
   percentUsed: number