diff --git a/scripts/dev-api.js b/scripts/dev-api.js
index ce1648d..a613e55 100644
--- a/scripts/dev-api.js
+++ b/scripts/dev-api.js
@@ -4762,6 +4762,38 @@ export function mergeHermesXSearchConfig(config = {}, form = {}) {
   return next
 }
 
+function normalizeHermesContextEngine(value, strict = false) {
+  const text = String(value ?? '').trim()
+  if (!text) {
+    if (strict) throw new Error('context.engine 不能为空')
+    return 'compressor'
+  }
+  if (/^[a-zA-Z0-9_.-]+$/.test(text)) return text
+  if (strict) throw new Error('context.engine 只能包含字母、数字、下划线、点和短横线')
+  return 'compressor'
+}
+
+export function buildHermesContextConfigValues(config = {}) {
+  const root = config && typeof config === 'object' && !Array.isArray(config) ? config : {}
+  const context = root.context && typeof root.context === 'object' && !Array.isArray(root.context)
+    ? root.context
+    : {}
+  return {
+    contextEngine: normalizeHermesContextEngine(context.engine, false),
+  }
+}
+
+export function mergeHermesContextConfig(config = {}, form = {}) {
+  const next = mergeConfigsPreservingFields({}, config && typeof config === 'object' && !Array.isArray(config) ? config : {})
+  const currentValues = buildHermesContextConfigValues(next)
+  const context = next.context && typeof next.context === 'object' && !Array.isArray(next.context)
+    ? mergeConfigsPreservingFields(next.context, {})
+    : {}
+  context.engine = normalizeHermesContextEngine(Object.hasOwn(form, 'contextEngine') ? form.contextEngine : currentValues.contextEngine, true)
+  next.context = context
+  return next
+}
+
 function isHermesModelAliasName(value) {
   return /^[a-zA-Z0-9_.-]+$/.test(String(value || '').trim())
 }
@@ -12519,6 +12551,27 @@ const handlers = {
     }
   },
 
+  hermes_context_config_read() {
+    const { configPath, exists, config } = readHermesConfigYamlObject()
+    return {
+      exists,
+      configPath,
+      values: buildHermesContextConfigValues(config),
+    }
+  },
+
+  hermes_context_config_save({ form } = {}) {
+    const { configPath, config } = readHermesConfigYamlObject()
+    const next = mergeHermesContextConfig(config, form || {})
+    const backup = writeHermesConfigYamlObject(configPath, next)
+    return {
+      ok: true,
+      configPath,
+      backup,
+      values: buildHermesContextConfigValues(next),
+    }
+  },
+
   hermes_model_aliases_config_read() {
     const { configPath, exists, config } = readHermesConfigYamlObject()
     return {
diff --git a/src-tauri/src/commands/hermes.rs b/src-tauri/src/commands/hermes.rs
index 95304ac..a7cbd55 100644
--- a/src-tauri/src/commands/hermes.rs
+++ b/src-tauri/src/commands/hermes.rs
@@ -8818,6 +8818,57 @@ fn merge_hermes_x_search_config(
     Ok(())
 }
 
+fn normalize_hermes_context_engine(value: Option<String>, strict: bool) -> Result<String, String> {
+    let text = value.unwrap_or_default().trim().to_string();
+    if text.is_empty() {
+        if strict {
+            return Err("context.engine 不能为空".to_string());
+        }
+        return Ok("compressor".to_string());
+    }
+    if text
+        .chars()
+        .all(|ch| ch.is_ascii_alphanumeric() || matches!(ch, '_' | '.' | '-'))
+    {
+        return Ok(text);
+    }
+    if strict {
+        return Err("context.engine 只能包含字母、数字、下划线、点和短横线".to_string());
+    }
+    Ok("compressor".to_string())
+}
+
+fn build_hermes_context_config_values(config: &serde_yaml::Value) -> Value {
+    let root = config.as_mapping();
+    let context = root.and_then(|map| yaml_get_mapping(map, "context"));
+    let engine = normalize_hermes_context_engine(
+        context.and_then(|map| yaml_string_field(map, "engine")),
+        false,
+    )
+    .unwrap_or_else(|_| "compressor".to_string());
+
+    serde_json::json!({
+        "contextEngine": engine,
+    })
+}
+
+fn merge_hermes_context_config(config: &mut serde_yaml::Value, form: &Value) -> Result<(), String> {
+    let current = build_hermes_context_config_values(config);
+    let engine = normalize_hermes_context_engine(
+        if form.get("contextEngine").is_some() {
+            form_string(form, "contextEngine")
+        } else {
+            current["contextEngine"].as_str().map(ToString::to_string)
+        },
+        true,
+    )?;
+
+    let root = ensure_yaml_object(config)?;
+    let context = yaml_child_object(root, "context")?;
+    context.insert(yaml_key("engine"), serde_yaml::Value::String(engine));
+    Ok(())
+}
+
 fn build_hermes_lsp_config_values(config: &serde_yaml::Value) -> Value {
     let root = config.as_mapping();
     let lsp = root.and_then(|map| yaml_get_mapping(map, "lsp"));
@@ -11623,6 +11674,30 @@ pub fn hermes_x_search_config_save(form: Value) -> Result<Value, String> {
     }))
 }
 
+#[tauri::command]
+pub fn hermes_context_config_read() -> Result<Value, String> {
+    let (config_path, exists, config) = read_hermes_channel_yaml_config()?;
+    ensure_yaml_object(&mut config.clone())?;
+    Ok(serde_json::json!({
+        "exists": exists,
+        "configPath": config_path.to_string_lossy(),
+        "values": build_hermes_context_config_values(&config),
+    }))
+}
+
+#[tauri::command]
+pub fn hermes_context_config_save(form: Value) -> Result<Value, String> {
+    let (config_path, _exists, mut config) = read_hermes_channel_yaml_config()?;
+    merge_hermes_context_config(&mut config, &form)?;
+    let backup = write_hermes_yaml_config(&config_path, &config)?;
+    Ok(serde_json::json!({
+        "ok": true,
+        "configPath": config_path.to_string_lossy(),
+        "backup": backup,
+        "values": build_hermes_context_config_values(&config),
+    }))
+}
+
 #[tauri::command]
 pub fn hermes_stt_config_read() -> Result<Value, String> {
     let (config_path, exists, config) = read_hermes_channel_yaml_config()?;
@@ -18489,6 +18564,73 @@ streaming:
     }
 }
 
+#[cfg(test)]
+mod hermes_context_config_tests {
+    use super::{build_hermes_context_config_values, merge_hermes_context_config};
+    use serde_json::json;
+
+    #[test]
+    fn context_values_have_upstream_defaults() {
+        let config: serde_yaml::Value = serde_yaml::from_str("{}").unwrap();
+        let values = build_hermes_context_config_values(&config);
+        assert_eq!(values["contextEngine"], "compressor");
+    }
+
+    #[test]
+    fn context_values_read_yaml_fields() {
+        let config: serde_yaml::Value = serde_yaml::from_str(
+            r#"
+context:
+  engine: lcm
+"#,
+        )
+        .unwrap();
+        let values = build_hermes_context_config_values(&config);
+        assert_eq!(values["contextEngine"], "lcm");
+    }
+
+    #[test]
+    fn merge_context_config_preserves_unknown_fields() {
+        let mut config: serde_yaml::Value = serde_yaml::from_str(
+            r#"
+context:
+  engine: compressor
+  custom_flag: keep-context
+model:
+  provider: anthropic
+streaming:
+  enabled: true
+"#,
+        )
+        .unwrap();
+
+        merge_hermes_context_config(&mut config, &json!({ "contextEngine": "lcm" })).unwrap();
+
+        assert_eq!(config["model"]["provider"].as_str(), Some("anthropic"));
+        assert_eq!(config["streaming"]["enabled"].as_bool(), Some(true));
+        assert_eq!(config["context"]["engine"].as_str(), Some("lcm"));
+        assert_eq!(
+            config["context"]["custom_flag"].as_str(),
+            Some("keep-context")
+        );
+    }
+
+    #[test]
+    fn merge_context_config_rejects_invalid_values() {
+        let mut config = serde_yaml::Value::Mapping(serde_yaml::Mapping::new());
+        let err =
+            merge_hermes_context_config(&mut config, &json!({ "contextEngine": "" })).unwrap_err();
+        assert!(err.contains("context.engine"));
+        let err =
+            merge_hermes_context_config(&mut config, &json!({ "contextEngine": "bad engine" }))
+                .unwrap_err();
+        assert!(err.contains("context.engine"));
+        let err = merge_hermes_context_config(&mut config, &json!({ "contextEngine": "中文" }))
+            .unwrap_err();
+        assert!(err.contains("context.engine"));
+    }
+}
+
 #[cfg(test)]
 mod hermes_lsp_config_tests {
     use super::{build_hermes_lsp_config_values, merge_hermes_lsp_config};
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 9b67a14..0ae3e13 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -335,6 +335,8 @@ pub fn run() {
             hermes::hermes_model_catalog_config_save,
             hermes::hermes_x_search_config_read,
             hermes::hermes_x_search_config_save,
+            hermes::hermes_context_config_read,
+            hermes::hermes_context_config_save,
             hermes::hermes_stt_config_read,
             hermes::hermes_stt_config_save,
             hermes::hermes_tts_voice_config_read,
diff --git a/src/engines/hermes/pages/config.js b/src/engines/hermes/pages/config.js
index ed1c5f3..482723d 100644
--- a/src/engines/hermes/pages/config.js
+++ b/src/engines/hermes/pages/config.js
@@ -132,6 +132,10 @@ const X_SEARCH_DEFAULTS = {
   xSearchRetries: 2,
 }
 
+const CONTEXT_DEFAULTS = {
+  contextEngine: 'compressor',
+}
+
 const MODEL_ALIASES_DEFAULTS = {
   modelAliasesJson: '{}',
 }
@@ -436,6 +440,7 @@ export function render() {
   let modelValues = { ...MODEL_DEFAULTS }
   let modelCatalogValues = { ...MODEL_CATALOG_DEFAULTS }
   let xSearchValues = { ...X_SEARCH_DEFAULTS }
+  let contextValues = { ...CONTEXT_DEFAULTS }
   let modelAliasesValues = { ...MODEL_ALIASES_DEFAULTS }
   let hooksValues = { ...HOOKS_DEFAULTS }
   let providerOverridesValues = { ...PROVIDER_OVERRIDES_DEFAULTS }
@@ -479,6 +484,7 @@ export function render() {
   let modelLoading = true
   let modelCatalogLoading = true
   let xSearchLoading = true
+  let contextLoading = true
   let modelAliasesLoading = true
   let hooksLoading = true
   let providerOverridesLoading = true
@@ -522,6 +528,7 @@ export function render() {
   let modelSaving = false
   let modelCatalogSaving = false
   let xSearchSaving = false
+  let contextSaving = false
   let modelAliasesSaving = false
   let hooksSaving = false
   let providerOverridesSaving = false
@@ -565,6 +572,7 @@ export function render() {
   let modelError = null
   let modelCatalogError = null
   let xSearchError = null
+  let contextError = null
   let modelAliasesError = null
   let hooksError = null
   let providerOverridesError = null
@@ -601,7 +609,7 @@ export function render() {
   }
 
   function isBusy() {
-    return loading || runtimeLoading || sessionsMaintenanceLoading || updatesLoading || compressionLoading || promptCachingLoading || openrouterCacheLoading || providerRoutingLoading || auxiliaryLoading || toolGuardrailsLoading || memoryLoading || skillsLoading || curatorLoading || quickCommandsLoading || modelLoading || modelCatalogLoading || xSearchLoading || modelAliasesLoading || hooksLoading || providerOverridesLoading || mcpServersLoading || agentToolsetsLoading || platformToolsetsLoading || agentRuntimeLoading || unauthorizedDmLoading || securityLoading || displayLoading || humanDelayLoading || kanbanLoading || streamingLoading || executionLimitsLoading || ioSafetyLoading || checkpointsLoading || cronLoading || loggingLoading || approvalsLoading || privacyLoading || browserLoading || webLoading || lspLoading || sttLoading || ttsVoiceLoading || terminalLoading || saving || runtimeSaving || sessionsMaintenanceSaving || updatesSaving || compressionSaving || promptCachingSaving || openrouterCacheSaving || providerRoutingSaving || auxiliarySaving || toolGuardrailsSaving || memorySaving || skillsSaving || curatorSaving || quickCommandsSaving || modelSaving || modelCatalogSaving || xSearchSaving || modelAliasesSaving || hooksSaving || providerOverridesSaving || mcpServersSaving || agentToolsetsSaving || platformToolsetsSaving || agentRuntimeSaving || unauthorizedDmSaving || securitySaving || displaySaving || humanDelaySaving || kanbanSaving || streamingSaving || executionLimitsSaving || ioSafetySaving || checkpointsSaving || cronSaving || loggingSaving || approvalsSaving || privacySaving || browserSaving || webSaving || lspSaving || sttSaving || ttsVoiceSaving || terminalSaving
+    return loading || runtimeLoading || sessionsMaintenanceLoading || updatesLoading || compressionLoading || promptCachingLoading || openrouterCacheLoading || providerRoutingLoading || auxiliaryLoading || toolGuardrailsLoading || memoryLoading || skillsLoading || curatorLoading || quickCommandsLoading || modelLoading || modelCatalogLoading || xSearchLoading || contextLoading || modelAliasesLoading || hooksLoading || providerOverridesLoading || mcpServersLoading || agentToolsetsLoading || platformToolsetsLoading || agentRuntimeLoading || unauthorizedDmLoading || securityLoading || displayLoading || humanDelayLoading || kanbanLoading || streamingLoading || executionLimitsLoading || ioSafetyLoading || checkpointsLoading || cronLoading || loggingLoading || approvalsLoading || privacyLoading || browserLoading || webLoading || lspLoading || sttLoading || ttsVoiceLoading || terminalLoading || saving || runtimeSaving || sessionsMaintenanceSaving || updatesSaving || compressionSaving || promptCachingSaving || openrouterCacheSaving || providerRoutingSaving || auxiliarySaving || toolGuardrailsSaving || memorySaving || skillsSaving || curatorSaving || quickCommandsSaving || modelSaving || modelCatalogSaving || xSearchSaving || contextSaving || modelAliasesSaving || hooksSaving || providerOverridesSaving || mcpServersSaving || agentToolsetsSaving || platformToolsetsSaving || agentRuntimeSaving || unauthorizedDmSaving || securitySaving || displaySaving || humanDelaySaving || kanbanSaving || streamingSaving || executionLimitsSaving || ioSafetySaving || checkpointsSaving || cronSaving || loggingSaving || approvalsSaving || privacySaving || browserSaving || webSaving || lspSaving || sttSaving || ttsVoiceSaving || terminalSaving
   }
 
   function option(labelKey, value, selected) {
@@ -1366,6 +1374,34 @@ export function render() {
     `
   }
 
+  function renderContextConfigPanel() {
+    const disabled = loading || saving || contextLoading || contextSaving || modelSaving || modelCatalogSaving || xSearchSaving || quickCommandsSaving || modelAliasesSaving || hooksSaving || providerOverridesSaving || mcpServersSaving || agentToolsetsSaving || agentRuntimeSaving || runtimeSaving || compressionSaving || promptCachingSaving || openrouterCacheSaving || providerRoutingSaving || auxiliarySaving || toolGuardrailsSaving || memorySaving || skillsSaving || streamingSaving || executionLimitsSaving || checkpointsSaving || cronSaving || loggingSaving || approvalsSaving || terminalSaving
+    return `
+      <div class="hm-panel hm-config-runtime-panel hm-config-context-panel">
+        <div class="hm-panel-header">
+          <div>
+            <div class="hm-panel-title">${t('engine.hermesContextConfigTitle')}</div>
+            <div class="hm-channel-panel-desc">${t('engine.hermesContextConfigDesc')}</div>
+          </div>
+          <div class="hm-panel-actions">
+            <span class="hm-muted">${contextSaving ? t('engine.hermesConfigStatusSaving') : contextLoading ? t('engine.hermesConfigStatusLoading') : t('engine.hermesContextConfigStatusReady')}</span>
+            <button class="hm-btn hm-btn--cta hm-btn--sm" id="hm-context-config-save" ${disabled ? 'disabled' : ''}>${t('engine.hermesContextConfigSave')}</button>
+          </div>
+        </div>
+        <div class="hm-panel-body">
+          ${renderError(contextError)}
+          <div class="hm-config-runtime-grid">
+            <label class="hm-field hm-field--wide">
+              <span class="hm-field-label">${t('engine.hermesContextConfigEngine')}</span>
+              <input id="hm-context-engine" class="hm-input" value="${esc(contextValues.contextEngine)}" placeholder="compressor" ${disabled ? 'disabled' : ''}>
+            </label>
+          </div>
+          <div class="hm-channel-footnote">${t('engine.hermesContextConfigFootnote')}</div>
+        </div>
+      </div>
+    `
+  }
+
   function renderModelAliasesConfigPanel() {
     const disabled = loading || saving || modelAliasesLoading || modelAliasesSaving || quickCommandsSaving || modelSaving || modelCatalogSaving || xSearchSaving || hooksSaving || providerOverridesSaving || mcpServersSaving || agentToolsetsSaving || agentRuntimeSaving || runtimeSaving || compressionSaving || promptCachingSaving || openrouterCacheSaving || providerRoutingSaving || auxiliarySaving || toolGuardrailsSaving || memorySaving || skillsSaving || streamingSaving || executionLimitsSaving || checkpointsSaving || cronSaving || loggingSaving || approvalsSaving || terminalSaving
     return `
@@ -2802,6 +2838,7 @@ export function render() {
       ${renderModelConfigPanel()}
       ${renderModelCatalogConfigPanel()}
       ${renderXSearchConfigPanel()}
+      ${renderContextConfigPanel()}
       ${renderModelAliasesConfigPanel()}
       ${renderHooksConfigPanel()}
       ${renderProviderOverridesConfigPanel()}
@@ -2849,6 +2886,7 @@ export function render() {
     el.querySelector('#hm-model-config-save')?.addEventListener('click', saveModelConfig)
     el.querySelector('#hm-model-catalog-save')?.addEventListener('click', saveModelCatalogConfig)
     el.querySelector('#hm-x-search-save')?.addEventListener('click', saveXSearchConfig)
+    el.querySelector('#hm-context-config-save')?.addEventListener('click', saveContextConfig)
     el.querySelector('#hm-model-aliases-save')?.addEventListener('click', saveModelAliasesConfig)
     el.querySelector('#hm-hooks-save')?.addEventListener('click', saveHooksConfig)
     el.querySelector('#hm-provider-overrides-save')?.addEventListener('click', saveProviderOverridesConfig)
@@ -2962,6 +3000,11 @@ export function render() {
     xSearchValues = { ...X_SEARCH_DEFAULTS, ...(data?.values || {}) }
   }
 
+  async function loadContextConfig() {
+    const data = await api.hermesContextConfigRead()
+    contextValues = { ...CONTEXT_DEFAULTS, ...(data?.values || {}) }
+  }
+
   async function loadModelAliasesConfig() {
     const data = await api.hermesModelAliasesConfigRead()
     modelAliasesValues = { ...MODEL_ALIASES_DEFAULTS, ...(data?.values || {}) }
@@ -3110,6 +3153,7 @@ export function render() {
     modelLoading = true
     modelCatalogLoading = true
     xSearchLoading = true
+    contextLoading = true
     modelAliasesLoading = true
     hooksLoading = true
     providerOverridesLoading = true
@@ -3153,6 +3197,7 @@ export function render() {
     modelError = null
     modelCatalogError = null
     xSearchError = null
+    contextError = null
     modelAliasesError = null
     hooksError = null
     providerOverridesError = null
@@ -3426,6 +3471,14 @@ export function render() {
       xSearchLoading = false
       draw()
     }
+    try {
+      await loadContextConfig()
+    } catch (err) {
+      contextError = humanizeError(err, t('engine.hermesContextConfigLoadFailed') || 'Load context config failed')
+    } finally {
+      contextLoading = false
+      draw()
+    }
     try {
       await loadModelAliasesConfig()
     } catch (err) {
@@ -4119,6 +4172,31 @@ export function render() {
     }
   }
 
+  async function saveContextConfig() {
+    const form = {
+      contextEngine: el.querySelector('#hm-context-engine')?.value || CONTEXT_DEFAULTS.contextEngine,
+    }
+    contextSaving = true
+    contextError = null
+    draw()
+    try {
+      const result = await api.hermesContextConfigSave(form)
+      contextValues = { ...CONTEXT_DEFAULTS, ...(result?.values || form) }
+      await refreshRawAfterStructuredSave()
+      const backup = result?.backup || ''
+      toast({
+        message: t('engine.hermesContextConfigSaveSuccess'),
+        hint: backup ? t('engine.hermesConfigBackupHint', { path: backup }) : '',
+      }, 'success')
+    } catch (err) {
+      contextError = humanizeError(err, t('engine.hermesContextConfigSaveFailed') || 'Save context config failed')
+      toast(contextError, 'error')
+    } finally {
+      contextSaving = false
+      draw()
+    }
+  }
+
   async function saveModelAliasesConfig() {
     const form = {
       modelAliasesJson: el.querySelector('#hm-model-aliases-json')?.value || '{}',
diff --git a/src/lib/tauri-api.js b/src/lib/tauri-api.js
index cc110aa..036c14e 100644
--- a/src/lib/tauri-api.js
+++ b/src/lib/tauri-api.js
@@ -587,6 +587,8 @@ export const api = {
   hermesModelCatalogConfigSave: (form) => invoke('hermes_model_catalog_config_save', { form }),
   hermesXSearchConfigRead: () => invoke('hermes_x_search_config_read'),
   hermesXSearchConfigSave: (form) => invoke('hermes_x_search_config_save', { form }),
+  hermesContextConfigRead: () => invoke('hermes_context_config_read'),
+  hermesContextConfigSave: (form) => invoke('hermes_context_config_save', { form }),
   hermesSttConfigRead: () => invoke('hermes_stt_config_read'),
   hermesSttConfigSave: (form) => invoke('hermes_stt_config_save', { form }),
   hermesTtsVoiceConfigRead: () => invoke('hermes_tts_voice_config_read'),
diff --git a/src/locales/modules/engine.js b/src/locales/modules/engine.js
index 0a3b33a..a883e06 100644
--- a/src/locales/modules/engine.js
+++ b/src/locales/modules/engine.js
@@ -762,6 +762,15 @@ export default {
   hermesXSearchConfigTimeoutSeconds: _('超时秒数', 'Timeout seconds', '逾時秒數'),
   hermesXSearchConfigRetries: _('重试次数', 'Retry count', '重試次數'),
   hermesXSearchConfigFootnote: _('这里写入 x_search.model、x_search.timeout_seconds 和 x_search.retries。xAI OAuth 或 XAI_API_KEY 仍由 Hermes 运行时读取；需要启用 x_search toolset 后才会调用该工具。未知 x_search 子字段会保留在 raw YAML 中。', 'This writes x_search.model, x_search.timeout_seconds, and x_search.retries. xAI OAuth or XAI_API_KEY is still read by the Hermes runtime; the x_search toolset must be enabled before the tool is called. Unknown x_search fields stay in raw YAML.', '這裡寫入 x_search.model、x_search.timeout_seconds 和 x_search.retries。xAI OAuth 或 XAI_API_KEY 仍由 Hermes 執行時讀取；需要啟用 x_search toolset 後才會呼叫該工具。未知 x_search 子欄位會保留在 raw YAML 中。'),
+  hermesContextConfigTitle: _('上下文引擎', 'Context engine', '上下文引擎'),
+  hermesContextConfigDesc: _('控制 Hermes 在接近上下文窗口上限时使用内置压缩器还是插件上下文引擎，适合长会话稳定性调优。', 'Control whether Hermes uses the built-in compressor or a plugin context engine when approaching the context window limit. Useful for long-session stability tuning.', '控制 Hermes 在接近上下文視窗上限時使用內建壓縮器還是外掛上下文引擎，適合長會話穩定性調校。'),
+  hermesContextConfigStatusReady: _('结构化配置', 'structured settings', '結構化設定'),
+  hermesContextConfigSave: _('保存上下文引擎配置', 'Save context engine settings', '儲存上下文引擎設定'),
+  hermesContextConfigSaveSuccess: _('上下文引擎配置已保存，建议重启 Hermes Gateway 生效', 'Context engine settings saved. Restart Hermes Gateway to take effect.', '上下文引擎設定已儲存，建議重啟 Hermes Gateway 生效'),
+  hermesContextConfigLoadFailed: _('加载上下文引擎配置失败', 'Load context engine settings failed', '載入上下文引擎設定失敗'),
+  hermesContextConfigSaveFailed: _('保存上下文引擎配置失败', 'Save context engine settings failed', '儲存上下文引擎設定失敗'),
+  hermesContextConfigEngine: _('引擎名称', 'Engine name', '引擎名稱'),
+  hermesContextConfigFootnote: _('这里写入 context.engine。compressor 表示使用内置压缩器；填写插件名会让 Hermes 尝试加载 plugins/context_engine/<name>/ 或用户插件目录中的上下文引擎。未知 context 子字段会保留在 raw YAML 中。', 'This writes context.engine. compressor uses the built-in compressor; entering a plugin name makes Hermes try plugins/context_engine/<name>/ or user plugin directories. Unknown context fields stay in raw YAML.', '這裡寫入 context.engine。compressor 表示使用內建壓縮器；填寫外掛名稱會讓 Hermes 嘗試載入 plugins/context_engine/<name>/ 或使用者外掛目錄中的上下文引擎。未知 context 子欄位會保留在 raw YAML 中。'),
   hermesLspConfigTitle: _('LSP 语义诊断', 'LSP semantic diagnostics', 'LSP 語意診斷'),
   hermesLspConfigDesc: _('控制写文件和补丁后的语言服务器诊断等待、工作区扫描和缺失服务器自动安装策略。', 'Control language-server diagnostic waits, workspace scans, and missing-server install strategy after file writes and patches.', '控制寫檔和補丁後的語言伺服器診斷等待、工作區掃描和缺失伺服器自動安裝策略。'),
   hermesLspConfigStatusReady: _('结构化配置', 'structured settings', '結構化設定'),
diff --git a/tests/hermes-config-page-ui.test.js b/tests/hermes-config-page-ui.test.js
index e8781ef..8ed7b48 100644
--- a/tests/hermes-config-page-ui.test.js
+++ b/tests/hermes-config-page-ui.test.js
@@ -150,6 +150,15 @@ test('Hermes 配置页会暴露 X 搜索结构化配置字段', () => {
   }
 })
 
+test('Hermes 配置页会暴露上下文引擎结构化配置字段', () => {
+  for (const id of [
+    'hm-context-config-save',
+    'hm-context-engine',
+  ]) {
+    assert.match(source, new RegExp(`id="${id}"`), `缺少 ${id}`)
+  }
+})
+
 test('Hermes 配置页会暴露 provider 超时覆盖结构化配置字段', () => {
   for (const id of [
     'hm-provider-overrides-save',
diff --git a/tests/hermes-context-config.test.js b/tests/hermes-context-config.test.js
new file mode 100644
index 0000000..4fa7662
--- /dev/null
+++ b/tests/hermes-context-config.test.js
@@ -0,0 +1,58 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+
+import {
+  buildHermesContextConfigValues,
+  mergeHermesContextConfig,
+} from '../scripts/dev-api.js'
+
+test('Hermes 上下文引擎配置读取会提供上游默认值', () => {
+  const values = buildHermesContextConfigValues({})
+
+  assert.deepEqual(values, {
+    contextEngine: 'compressor',
+  })
+})
+
+test('Hermes 上下文引擎配置读取会回显 YAML 字段', () => {
+  const values = buildHermesContextConfigValues({
+    context: {
+      engine: 'lcm',
+    },
+  })
+
+  assert.equal(values.contextEngine, 'lcm')
+})
+
+test('Hermes 上下文引擎配置保存会保留未知字段并写入上游结构', () => {
+  const next = mergeHermesContextConfig({
+    context: {
+      engine: 'compressor',
+      custom_flag: 'keep-context',
+    },
+    model: { provider: 'anthropic' },
+    streaming: { enabled: true },
+  }, {
+    contextEngine: 'lcm',
+  })
+
+  assert.deepEqual(next.model, { provider: 'anthropic' })
+  assert.deepEqual(next.streaming, { enabled: true })
+  assert.equal(next.context.engine, 'lcm')
+  assert.equal(next.context.custom_flag, 'keep-context')
+})
+
+test('Hermes 上下文引擎配置保存会拒绝非法引擎名', () => {
+  assert.throws(
+    () => mergeHermesContextConfig({}, { contextEngine: '' }),
+    /context\.engine/,
+  )
+  assert.throws(
+    () => mergeHermesContextConfig({}, { contextEngine: 'bad engine' }),
+    /context\.engine/,
+  )
+  assert.throws(
+    () => mergeHermesContextConfig({}, { contextEngine: '中文' }),
+    /context\.engine/,
+  )
+})