diff --git a/README.en.md b/README.en.md
new file mode 100644
index 0000000..99caf8e
--- /dev/null
+++ b/README.en.md
@@ -0,0 +1,178 @@
+# ST-BME — SillyTavern Bionic Memory Ecology
+
+> Let the AI truly remember your story.
+
+[中文](README.md) · **English**
+
+ST-BME (Bionic Memory Ecology) is a **SillyTavern third-party frontend extension**. It distills the characters, events, locations, rules, plot threads, reflections, and summaries that appear over a long chat into a visual memory graph, then automatically recalls the most relevant memories and injects them into the prompt before each generation.
+
+---
+
+## Documentation
+
+This README is a **slim entry point**. The details live in [`docs/`](docs/README.md):
+
+| What you want | Where to look |
+| --- | --- |
+| Usage: configuration, panel, troubleshooting, storage | [`docs/usage/`](docs/usage/) |
+| Architecture, control plane, data formats | [`docs/architecture/`](docs/architecture/) |
+| Algorithm internals (retrieval / extraction / vectors) | [`docs/algorithms/`](docs/algorithms/) |
+| How each feature works and its boundaries | [`docs/features/`](docs/features/) |
+| Development, testing, contribution conventions | [`docs/contributing/`](docs/contributing/) |
+
+Quick links: [Configuration](docs/usage/configuration.md) · [Panel guide](docs/usage/panel.md) · [Troubleshooting](docs/usage/troubleshooting.md) · [Memory model](docs/features/memory-model.md) · [History safety](docs/features/history-safety.md)
+
+> Developer docs (architecture / algorithms / features / contributing) are currently Chinese-only. The English docs cover the README and the `docs/usage/` user manual.
+
+---
+
+## Core capabilities
+
+- **Automatic memory extraction** — After each AI reply, ST-BME extracts structured nodes and relations from the conversation (characters, events, locations, rules, plot threads, reflections, subjective memories), excluding reasoning tags like `think`/`analysis`/`reasoning` by default.
+- **Multi-layer hybrid recall** — Before generation, relevant memories are recalled through vector prefilter, graph diffusion, lexical boosting, multi-intent splitting, DPP diversity sampling, and optional LLM reranking; per-message persistent recall cards are supported.
+- **Cognitive architecture** — Character POV / user POV / objective world memory, spatial region weighting, and a story timeline.
+- **Summarization & maintenance** — Small summaries, summary rollup, reflection, consolidation, automatic compression, active forgetting — all logged and reversible.
+- **Graph visualization** — A built-in canvas force-directed graph with realtime / cognitive / summary views and a mobile view.
+- **Task preset system** — Extraction, recall, compression, summary, reflection, consolidation, and planning all run through a unified task profile, with regex, world info, and EJS rendering.
+- **ENA Planner integration** — Pre-send story planning, integrated into the config page and the `planner` task preset.
+- **Persistence & sync** — Local-first (IndexedDB), with cloud mirroring, backup/restore, rebuild, and repair.
+- **History safety** — Detects message deletion / edits / swipes, automatically rolls back affected batches and recovers from the change point; protects against truncated "render only the last N" views.
+- **Long-chat optimization** — Hide old turns to control tokens, limit rendered turns to reduce lag, and accelerate key computations with a Native/WASM rollout.
+
+---
+
+## How it works
+
+ST-BME can be understood as three pipelines: **write** (conversation → memory), **read** (memory → injection), and **safety** (history change → recovery).
+
+```mermaid
+flowchart LR
+    subgraph Write["Write: conversation → memory"]
+        A["AI reply"] --> B["Structured message preprocessing"]
+        B --> C["LLM extracts nodes/edges"]
+        C --> D["Nearest-neighbor reconciliation + cognitive scoping"]
+        D --> E["Write graph + vector sync + timeline"]
+        E --> F["Consolidate / compress / summarize / reflect"]
+    end
+
+    subgraph Read["Read: memory → injection"]
+        G["User about to generate"] --> H["Multi-intent + context-blended query"]
+        H --> I["Vector prefilter + graph diffusion + lexical boost"]
+        I --> J["Cognitive boundary filter + hybrid scoring"]
+        J --> K["Optional LLM rerank + bucketed injection"]
+    end
+
+    subgraph Safe["Safety: history change → recovery"]
+        L["Delete / edit / swipe"] --> M["Message hash detection"]
+        M --> N["Locate affected turns"]
+        N --> O["Roll back batches and vectors"]
+        O --> P["Re-extract from the change point"]
+    end
+
+    F -.-> G
+    P -.-> E
+```
+
+- **Write**: the conversation is normalized into structured messages (reasoning tags excluded by default) → the LLM emits structured graph operations → nodes are written, vectors synced, timeline updated → post-processing (consolidation, compression, summary, reflection, forgetting).
+- **Read**: resolve the recall target → vector prefilter + graph diffusion + lexical boost → rank and filter by fusing multiple signals → bucketed injection into the prompt, optionally writing a persistent recall card.
+- **Safety**: a hash is recorded for each processed message; when a history change is detected, ST-BME prefers rollback-and-replay from the maintenance log, falling back to a full rebuild only when a safe rollback is not possible.
+
+> Algorithm details (formulas, parameters, thresholds) are in [`docs/algorithms/`](docs/algorithms/); architecture and data paths are in [`docs/architecture/overview.md`](docs/architecture/overview.md).
+
+---
+
+## Installation
+
+### Option 1: install via SillyTavern extensions
+
+Open SillyTavern → Extensions → Install third-party extension, and enter the repository URL:
+
+```text
+https://github.com/Youzini-afk/ST-Bionic-Memory-Ecology
+```
+
+Refresh the page after installation.
+
+> Paste the repository root URL, not a GitHub sub-page URL.
+
+### Option 2: manual installation
+
+```bash
+cd SillyTavern/data/default-user/extensions/third-party
+git clone https://github.com/Youzini-afk/ST-Bionic-Memory-Ecology.git st-bme
+```
+
+Then restart or refresh SillyTavern.
+
+---
+
+## Quick start
+
+1. **Open the panel** — Click "Memory Graph" in the top-left menu.
+2. **Enable the plugin** — Config → Feature toggles, confirm the main switch is on.
+3. **Configure the model** — Leave the memory LLM blank to reuse the current chat model; or fill in an independent OpenAI-compatible URL/key/model under "API config".
+4. **Configure embedding** — Backend mode is recommended (reuses SillyTavern's configured vector provider); direct mode also works but you must handle CORS yourself.
+5. **Start chatting** — Just chat normally. Extraction runs after each AI reply, and recall runs before the next generation.
+6. **Check results** — "Overview" for status, "Tasks → Memory browser" for nodes, the graph area for the relation network; a recall card may appear under user messages.
+
+> Minimum viable setup: enable the plugin and ensure the current chat model works. Recall quality drops noticeably when embedding is unavailable, so configure it early.
+>
+> See [Configuration](docs/usage/configuration.md) for full settings and [Panel guide](docs/usage/panel.md) for what each panel area does.
+
+---
+
+## Common actions
+
+| Action | Location | Description |
+| --- | --- | --- |
+| Re-extract | Actions → Memory ops | Extract unprocessed turns or rerun a range |
+| Manual compress | Actions → Memory ops | Merge redundant high-level nodes |
+| Generate small summary | Actions → Memory ops | Produce a staged summary for the recent text window |
+| Run summary rollup | Actions → Memory ops | Fold multiple active summaries into a higher-level one |
+| Rebuild summary state | Actions → Memory ops | Rebuild summaryState from extraction batches |
+| Force evolution | Actions → Memory ops | Let new memories actively affect old ones |
+| Run forgetting | Actions → Memory ops | Archive or down-weight low-value nodes |
+| Undo recent maintenance | Actions → Memory ops | Roll back the most recent reversible maintenance |
+| Rebuild vectors | Actions → Vector ops | Rebuild all node embeddings |
+| Range rebuild | Actions → Vector ops | Rebuild only nodes related to a turn range |
+| Direct re-embed | Actions → Vector ops | Re-embed using the direct embedding config |
+| Export / import / rebuild graph | Actions → Graph management | Graph management and destructive ops |
+| Backup / restore cloud | Config → Cloud storage mode | Manually upload/restore in manual mode |
+| Unhide all | Config → Hide old turns | Restore turns hidden by ST-BME |
+
+> After switching embedding mode or model, run "Rebuild vectors". Per-action details and danger notes are in [Configuration](docs/usage/configuration.md) and [Panel guide](docs/usage/panel.md).
+
+---
+
+## Data storage & history safety (highlights)
+
+- **Local-first**: primary storage uses IndexedDB, isolated per chat (`STBME_{chatId}`), with incremental commits on the hot path.
+- **Cloud mirroring**: reuses SillyTavern's file API, supports auto/manual modes, requires no custom backend.
+- **History safety**: detects delete/edit/swipe, prefers rollback-and-replay, falls back to full rebuild when needed; protects against render-truncated views to avoid wrongly clearing the graph.
+- **Forward compatibility**: durable snapshots have a frozen top-level shape, tolerant parsing, and upgrade-on-read — extending the data structure means "add a field", not a big migration.
+
+> See [Storage & sync](docs/usage/storage-and-sync.md), [History safety](docs/features/history-safety.md), and [Data formats & forward compatibility](docs/architecture/storage-and-formats.md).
+
+---
+
+## Having trouble?
+
+Step-by-step troubleshooting for common situations (panel won't open, no auto-extraction, poor recall, nodes appear cleared, recall cards missing, direct embedding fails, etc.) is in [Troubleshooting](docs/usage/troubleshooting.md).
+
+---
+
+## Known limitations
+
+- **Memory quality depends on the LLM** — if the extraction model misunderstands, the memory will be wrong too.
+- **Embedding sets the recall floor** — without high-quality vectors, recall leans more on lexical and graph structure.
+- **Direct mode may be affected by CORS** — browser security policy may block requests.
+- **Very long chats still have a cost** — hiding/render limits/summary rollup reduce pressure but can't eliminate all overhead.
+- **History recovery prioritizes correctness** — it falls back to a full rebuild when the log is insufficient, which can be slow.
+- **Third-party themes may affect recall card mounting** — cards may skip mounting if a theme removes the standard message DOM or turn-index attributes.
+- **Native acceleration is a rollout capability** — it fails open to JS by default and can be force-disabled in the panel.
+
+---
+
+## License
+
+AGPLv3 — see [LICENSE](./LICENSE).
diff --git a/README.md b/README.md
index 458c79f..de3373a 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 > 让 AI 真正记住你们的故事。
 
+**中文** · [English](README.en.md)
+
 ST-BME（Bionic Memory Ecology）是一个 **SillyTavern 第三方前端扩展**。它会把长期聊天中出现的角色、事件、地点、规则、主线、反思和总结抽取成一张可视化记忆图谱，并在下一轮生成前自动召回最相关的记忆注入 prompt。
 
 ---
diff --git a/docs/README.md b/docs/README.md
index 06bf90e..cd94cf7 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -8,12 +8,12 @@
 ## 文档地图
 
 ### usage/ — 使用手册
-面向用户："怎么配、怎么用、出问题怎么查"。从精简后的 README 下沉的详细内容。
+面向用户："怎么配、怎么用、出问题怎么查"。从精简后的 README 下沉的详细内容。中英双语（`.md` 中文 / `.en.md` English）。
 
-- [`configuration.md`](usage/configuration.md) — 完整配置参考：记忆 LLM、Embedding、提取/召回/认知/维护设置、任务预设、ENA、隐藏/渲染、Native
-- [`panel.md`](usage/panel.md) — 面板导览：总览、任务、操作、配置、图谱区域
-- [`troubleshooting.md`](usage/troubleshooting.md) — 排障指南
-- [`storage-and-sync.md`](usage/storage-and-sync.md) — 数据存储、云端镜像、兼容兜底、持久召回卡片
+- [`configuration.md`](usage/configuration.md) · [EN](usage/configuration.en.md) — 完整配置参考：记忆 LLM、Embedding、提取/召回/认知/维护设置、任务预设、ENA、隐藏/渲染、Native
+- [`panel.md`](usage/panel.md) · [EN](usage/panel.en.md) — 面板导览：总览、任务、操作、配置、图谱区域
+- [`troubleshooting.md`](usage/troubleshooting.md) · [EN](usage/troubleshooting.en.md) — 排障指南
+- [`storage-and-sync.md`](usage/storage-and-sync.md) · [EN](usage/storage-and-sync.en.md) — 数据存储、云端镜像、兼容兜底、持久召回卡片
 
 ### architecture/ — 架构与控制平面
 跨文件的结构、数据路径、不变量。这些内容变化慢，是理解"为什么这样组织"的入口。
@@ -56,3 +56,9 @@
 1. **离代码越近，腐烂越慢。** 单个函数的 API 细节留在模块头注释里（改代码自然会改它），不抄进这里。本目录只写"跨文件的算法原理、不变量、功能行为"。
 2. **不写一改就过期的内容。** 避免"某函数第几行做什么"这种描述；算法文档引用文件位置时，描述的是"哪个算法在哪个文件"，而非逐行。
 3. **改了行为就更新对应文档。** 算法参数、不变量、功能边界发生变化时，更新这里；纯重构（不改行为）通常不需要动文档。
+
+## 双语约定
+
+- **中文为源，英文跟随。** `.md` 是中文权威版，`.en.md` 是英文翻译。改文档先改中文 `.md`，再同步对应 `.en.md`。
+- 目前英文覆盖范围：根 `README`、`docs/usage/` 用户手册。`architecture/` / `algorithms/` / `features/` / `contributing/` 暂为中文，按需再加英文。
+- 英文文件里指向其它有 `.en.md` 的文档时，链到英文兄弟文件；指向暂无英文版的开发者文档时，链到中文版即可。
diff --git a/docs/usage/configuration.en.md b/docs/usage/configuration.en.md
new file mode 100644
index 0000000..8b45ca5
--- /dev/null
+++ b/docs/usage/configuration.en.md
@@ -0,0 +1,204 @@
+# Configuration
+
+[中文](configuration.md) · **English**
+
+This page is split out from the [README](../../README.en.md) as the main ST-BME user configuration reference, preserving setting names, defaults, and tables for quick lookup by feature.
+
+### Memory LLM
+
+The memory LLM is used for:
+
+- Memory extraction.
+- Recall reranking.
+- Consolidation.
+- Compression.
+- Small summaries.
+- Summary rollup.
+- Reflection.
+- ENA Planner planning.
+
+Configuration options:
+
+- **Leave blank**
+  - Reuse the current SillyTavern chat model.
+
+- **Fill in OpenAI-compatible config**
+  - Use an independent model for memory tasks.
+  - Useful when you want to separate the main chat model from the background maintenance model.
+
+Security recommendations:
+
+- Do not publicly share exported `extension_settings` or browser storage that contains API keys.
+- Debug logs are off by default; enable them temporarily only when troubleshooting.
+
+### Embedding
+
+Embedding is the core of smart recall.
+
+#### Backend mode
+
+Backend mode is recommended first:
+
+- Reuse SillyTavern backend's embedding provider.
+- Usually avoids storing the embedding API key directly in the browser.
+- Can use sources already supported by SillyTavern, such as OpenAI, Cohere, Mistral, Ollama, LlamaCpp, and vLLM.
+
+#### Direct mode
+
+In direct mode, the browser requests the embedding service directly:
+
+- Requires filling in the API URL, key, and model.
+- May hit CORS restrictions.
+- Suitable for a self-hosted gateway or independent embedding service.
+
+> After switching embedding mode or model, run "rebuild vectors".
+
+### Extraction settings
+
+| Setting | Default | Description |
+| --- | --- | --- |
+| 每 N 条回复提取 | `1` | Trigger extraction every N assistant replies |
+| 提取上下文轮数 | `2` | Number of conversation rounds to look back during extraction |
+| 自动延后最新助手 | `false` | Allows the latest reply to stabilize before extraction |
+| Assistant 排除标签 | `think,analysis,reasoning` | Excludes reasoning tags by default |
+| 提取消息上限 | `0` | `0` means unlimited |
+| 提取 Prompt 结构模式 | `both` | Provides both transcript and structured messages |
+| 提取世界书模式 | `active` | Reuses the currently active world info context |
+| 包含故事时间 | `true` | Provides the story timeline during extraction |
+| 包含总结快照 | `true` | Provides active summaries during extraction |
+| 手动提取模式 | `pending` | Default extraction mode in the panel |
+
+### Recall settings
+
+| Setting | Default | Description |
+| --- | --- | --- |
+| 启用召回 | `true` | Automatically retrieve memories before generation |
+| 向量预筛 | `true` | Use embedding to find candidates first |
+| 图扩散 | `true` | Diffuse along graph relations to related nodes |
+| LLM 精排 | `true` | Let the LLM select final results from candidates |
+| 召回 Top-K | `20` | Vector prefilter count |
+| 最终节点上限 | `12` | Maximum number of nodes kept before injection |
+| 图扩散 Top-K | `100` | Graph diffusion candidate count |
+| LLM 候选池 | `30` | Candidate pool size for reranking |
+| 多意图拆分 | `true` | Split one input into multiple retrieval intents |
+| 上下文混合查询 | `true` | Blend the current input, previous assistant reply, and previous user message |
+| 词法增强 | `true` | Weight exact keyword matches |
+| 时序链接 | `true` | Mutually boost temporally nearby nodes |
+| 多样性采样 | `true` | Avoid overly homogeneous recall results |
+
+### Cognitive and spatial settings
+
+| Setting | Default | Description |
+| --- | --- | --- |
+| Scoped Memory | `true` | Enable scoped memory |
+| POV Memory | `true` | Enable character/user POV memory |
+| 区域目标 | `true` | Distinguish current region, adjacent regions, and global |
+| 认知记忆 | `true` | Enable subjective/objective cognitive attribution |
+| 空间邻接 | `true` | Allow adjacency relations between regions |
+| 故事时间线 | `true` | Enable story timeline tags |
+| 注入故事时间标签 | `true` | Hint the current story time in injection |
+| 软时间引导 | `true` | Guide by prompting, without forcing rewrites |
+
+### Maintenance settings
+
+| Setting | Default | Description |
+| --- | --- | --- |
+| 启用整合 | `true` | Similar/conflicting memory analysis and merge |
+| 整合阈值 | `0.85` | Similarity trigger threshold |
+| 启用小总结 | `true` | Compatible with the old `synopsis` name |
+| 启用层级总结 | `true` | Use a small summary + rollup summary system |
+| 小总结频率 | `3` | Generate a small summary every N extractions |
+| 总结折叠扇入 | `3` | Roll up summaries when this many exist at the same layer |
+| 启用智能触发 | `false` | Enhance extraction only in high-information scenes |
+| 启用主动遗忘 | `false` | Periodically lower the priority of low-value nodes |
+| 启用概率召回 | `false` | Allow a small number of weakly related memories to enter by probability |
+| 启用反思 | `true` | Periodically summarize long-term trends |
+| 启用自动压缩 | `true` | Compress similar memories by extraction cycle |
+
+### Task presets and regex cleanup
+
+Task preset types:
+
+- **`extract`**
+  - Memory extraction.
+
+- **`recall`**
+  - Recall reranking.
+
+- **`compress`**
+  - Memory compression.
+
+- **`synopsis`**
+  - Small summary generation.
+
+- **`summary_rollup`**
+  - Summary rollup.
+
+- **`reflection`**
+  - Long-term reflection.
+
+- **`consolidation`**
+  - Memory consolidation.
+
+- **`planner`**
+  - ENA Planner planning.
+
+Regex cleanup reduces polluted tags from entering extraction, recall, and injection:
+
+- `thinking` / `think` / `analysis` / `reasoning`
+- `choice`
+- `UpdateVariable`
+- `status_current_variable`
+- `StatusPlaceHolderImpl`
+
+Users can adjust global regex rules and task-local rules in "Task presets". When an empty rule set is explicitly saved, the plugin will not automatically add the default rules back.
+
+### ENA Planner
+
+ENA Planner is now integrated through the `planner` task preset. For deeper implementation and flow details, see the [ENA Planner feature doc](../features/ena-planner.md). It can use:
+
+- Character card blocks.
+- World info blocks.
+- Recent chat blocks.
+- BME recalled memory blocks.
+- Historical `<plot>` blocks.
+- Current player input blocks.
+
+Recommendations:
+
+- Configure the base API and enabled state in "Config → ENA Planner".
+- Adjust the planning prompt structure and generation parameters in "Config → Task presets → planner".
+
+### Hide old turns and render limit
+
+These are two separate features; for deeper implementation and boundary details, see the [Hide old turns and render limit feature doc](../features/hide-and-render.md):
+
+- **Hide old turns**
+  - Controls context tokens.
+  - Does not delete chat content.
+  - Uses SillyTavern's hide mechanism so earlier turns no longer participate in the main reply or ST-BME reads.
+
+- **Limit rendered chat turns**
+  - Reduces lag in very long chat UIs.
+  - Syncs to SillyTavern's `chat_truncation`.
+  - Only controls how many recent turns the frontend loads at most.
+  - It is not context hiding and is not message deletion.
+
+Important notes:
+
+- If you need to run "rerun extraction range" or full history recovery on very old turns, temporarily disable the render limit or increase the count and refresh.
+- When ST-BME detects that the current `context.chat` is likely only a recent N-turn render slice, it pauses destructive history recovery to avoid wrongly clearing the runtime graph.
+
+### Native acceleration
+
+Native acceleration is currently a gradual rollout capability. For deeper implementation and fallback strategy details, see the [Native acceleration feature doc](../features/native-acceleration.md). It covers:
+
+- Graph layout.
+- Persist Delta.
+- Snapshot Hydrate.
+
+Default strategy:
+
+- Automatically activates based on thresholds for node count, edge count, record count, structural changes, and serialized size.
+- `Fail-open` is enabled by default; when Native is unavailable or fails, ST-BME falls back to JS.
+- You can use "globally force-disable Native" to fall back to JS everywhere.
diff --git a/docs/usage/configuration.md b/docs/usage/configuration.md
index 788e43d..f0026e9 100644
--- a/docs/usage/configuration.md
+++ b/docs/usage/configuration.md
@@ -1,5 +1,7 @@
 # 主要配置
 
+**中文** · [English](configuration.en.md)
+
 本文从 [README](../../README.md) 拆出 ST-BME 的主要用户配置说明，保留设置名称、默认值和表格，便于按功能查阅。
 
 ### 记忆 LLM
diff --git a/docs/usage/panel.en.md b/docs/usage/panel.en.md
new file mode 100644
index 0000000..56ad05b
--- /dev/null
+++ b/docs/usage/panel.en.md
@@ -0,0 +1,113 @@
+# Panel guide
+
+[中文](panel.md) · **English**
+
+This page is split out from the [README](../../README.en.md) as a user guide to the ST-BME panel areas, preserving the original item structure for daily lookup.
+
+### Overview
+
+- **Active nodes, edge connections, archived, fragmentation ratio**
+- **Current chat ID**
+- **History status**
+- **Vector status**
+- **Recent recovery**
+- **Recent extraction**
+- **Recent persistence**
+- **Recent vector**
+- **Recent recall**
+- **Cognitive / spatial status**
+
+### Tasks
+
+The tasks page is used to observe ST-BME's background task flow in realtime.
+
+- **Pipeline overview**
+  - Stage status for extraction, recall, persistence, vectors, and more.
+
+- **Task timeline**
+  - Timeline and stage results for recent tasks.
+
+- **Memory browser**
+  - Browse, filter, and inspect node details.
+
+- **Injection preview**
+  - View the currently constructed injection text and token estimate.
+
+- **Message tracing**
+  - Trace turns, extraction ranges, recall sources, and persistent records.
+
+- **Persistence**
+  - View diagnostics for IndexedDB, sync, recovery, sidecar, native hydrate, and more.
+
+### Actions
+
+- **Re-extract**
+  - `提取未处理`: only process assistant turns that have not been extracted yet.
+  - `重新提取范围`: rerun a specified range by start/end turn.
+
+- **Manual compression**
+  - Compress redundant or similar memories.
+
+- **Generate small summary**
+  - Generate a staged summary based on a recent source text window.
+
+- **Run summary rollup**
+  - Fold multiple active summaries into a higher-level summary.
+
+- **Rebuild summary state**
+  - Rebuild summary state from extraction batches.
+
+- **Force evolution**
+  - Let new memories actively affect old memories.
+
+- **Run forgetting**
+  - Lower the priority of long-unused nodes or archive them.
+
+- **Undo recent maintenance**
+  - Roll back the most recent reversible maintenance action.
+
+- **Rebuild vectors / Range rebuild / Direct re-embed**
+  - Rebuild node vectors to fix recall quality or inconsistencies after switching vector models.
+
+- **Export / import / rebuild graph**
+  - Graph management and dangerous operations.
+
+- **Persistence repair**
+  - Retry persistence, re-detect the graph, rebuild the local cache, and repair/compact the main sidecar.
+
+### Config
+
+The config page contains these workspaces:
+
+- **API config**
+  - Memory LLM.
+  - Embedding backend mode/direct mode.
+
+- **Feature toggles**
+  - Main capabilities such as extraction, recall, consolidation, summary, reflection, compression, forgetting, and probabilistic recall.
+  - Cloud storage mode.
+  - World info filtering.
+  - Hide old turns and limit rendered chat turns.
+
+- **Detailed parameters**
+  - Extraction frequency, context window, recall Top-K, graph diffusion, cognitive weights, maintenance thresholds, and more.
+
+- **Task presets**
+  - Prompt blocks, generation parameters, regex, world info, and EJS templates for each task type.
+
+- **ENA Planner**
+  - API, model, planning config, and task preset entry point for ENA Planner.
+
+- **Panel appearance**
+  - Theme, notification style, debug logs, and Native acceleration.
+
+- **Data cleanup**
+  - Cleanup entry points for local cache, legacy data, debug state, and more.
+
+### Graph area
+
+Desktop shows a realtime graph area. Mobile provides subview switching:
+
+- **Realtime graph**
+- **Cognitive view**
+- **Summary view**
diff --git a/docs/usage/panel.md b/docs/usage/panel.md
index 42cf50b..6a04f37 100644
--- a/docs/usage/panel.md
+++ b/docs/usage/panel.md
@@ -1,5 +1,7 @@
 # 面板导览
 
+**中文** · [English](panel.en.md)
+
 本文从 [README](../../README.md) 拆出 ST-BME 面板各区域的用户导览，保留原有条目结构，方便日常查找。
 
 ### 总览
diff --git a/docs/usage/storage-and-sync.en.md b/docs/usage/storage-and-sync.en.md
new file mode 100644
index 0000000..ab19312
--- /dev/null
+++ b/docs/usage/storage-and-sync.en.md
@@ -0,0 +1,49 @@
+# Storage & sync
+
+[中文](storage-and-sync.md) · **English**
+
+This page is split out from the [README](../../README.en.md) with ST-BME data storage, cloud mirroring, and persistent recall card notes; durable snapshot contract and forward-compat details are in the [storage and formats architecture doc](../architecture/storage-and-formats.md).
+
+### Local primary storage
+
+- Primary storage uses IndexedDB.
+- Databases are isolated per chat and named like `STBME_{chatId}`.
+- The hot path uses incremental commits to avoid replacing the whole graph.
+- On load, the graph is restored from the local database first.
+
+### Cloud mirroring
+
+Cloud sync uses SillyTavern's existing file API and requires no custom backend route.
+
+- Automatic mode:
+  - After local writes, sync according to the current mirroring logic.
+
+- Manual mode:
+  - Local writes still work normally.
+  - Does not write to the cloud automatically.
+  - Requires clicking "backup to cloud" or "fetch backup from cloud".
+
+### Compatibility and fallback
+
+- Old `chat_metadata.st_bme_graph` is only used as a migration and fallback source.
+- shadow snapshot and metadata-full are recoverable anchors, not the preferred primary storage.
+- tombstone is used to sync deletion state and prevent old data from coming back.
+- Plugin settings are stored in SillyTavern's `extension_settings.st_bme`.
+- Message-level recall is stored in the corresponding user message's `message.extra.bme_recall`.
+
+### Persistent recall cards
+
+User messages with valid `message.extra.bme_recall` display recall cards:
+
+- Expand to view the recall text.
+- View the recall subgraph.
+- Click nodes to view details.
+- Edit the injection text.
+- Delete persistent recall.
+- Re-run recall and overwrite the record.
+
+Priority:
+
+1. When a new recall succeeds in this round, use the new recall and write it back to the target user turn.
+2. When there is no new recall in this round, read persistent recall from the user turn corresponding to the current generation as fallback.
+3. When neither exists, clear the injection.
diff --git a/docs/usage/storage-and-sync.md b/docs/usage/storage-and-sync.md
index 4e09ac2..908c664 100644
--- a/docs/usage/storage-and-sync.md
+++ b/docs/usage/storage-and-sync.md
@@ -1,5 +1,7 @@
 # 数据存储与同步
 
+**中文** · [English](storage-and-sync.en.md)
+
 本文从 [README](../../README.md) 拆出 ST-BME 的数据存储、云端镜像与持久召回卡片说明；durable snapshot contract 和 forward-compat 细节见 [存储与格式架构文档](../architecture/storage-and-formats.md)。
 
 ### 本地主存储
diff --git a/docs/usage/troubleshooting.en.md b/docs/usage/troubleshooting.en.md
new file mode 100644
index 0000000..210889e
--- /dev/null
+++ b/docs/usage/troubleshooting.en.md
@@ -0,0 +1,68 @@
+# Troubleshooting
+
+[中文](troubleshooting.md) · **English**
+
+This page is split out from the [README](../../README.en.md) with common ST-BME user issues and fixes, so you can locate problems by symptom.
+
+### Panel won't open
+
+- Refresh the SillyTavern page.
+- Confirm the extension directory contains `manifest.json`, `index.js`, and `style.css`.
+- Open the browser console and search for `[ST-BME]`.
+- Check whether another extension has overridden the top-left menu structure.
+
+### No automatic extraction
+
+- Confirm the plugin is enabled.
+- Confirm the current chat already has assistant replies.
+- Check "Overview → Recent extraction" and "Tasks → Pipeline overview".
+- Check whether the memory LLM is available.
+- If smart triggering is enabled, confirm the current content meets the trigger conditions.
+- If a restore lock or persistence loading is active, wait for the state to recover.
+
+### Poor recall quality
+
+- Configure or repair Embedding.
+- Run "rebuild vectors".
+- Check whether recall Top-K, final node limit, and LLM reranking are enabled.
+- Check whether nodes are too many or too scattered; you can run consolidation or compression.
+- Check the per-message recall card to confirm the actual injection content.
+
+### The model still sees too much content after old turns are hidden
+
+- "Limit rendered chat turns" only reduces frontend loading; it does not save tokens.
+- To actually control context, enable "hide old turns".
+- After changing the setting, click "re-apply current hiding".
+
+### Manual extraction says history recovery is paused
+
+This is usually because "limit rendered chat turns" is enabled, so the frontend currently loads only the latest N turns.
+
+How to handle it:
+
+1. Temporarily disable "limit rendered chat turns", or increase N enough to cover the range you need to process.
+2. Refresh the current chat.
+3. Then run "extract unprocessed" or "rerun extraction range".
+
+This is a protection mechanism; it does not mean the graph was lost.
+
+### Nodes suddenly look cleared
+
+- Refresh the page first.
+- If it recovers after refresh, it is usually a temporary runtime state inconsistency; the persisted graph was not lost.
+- Check "Overview → Recent recovery" and "Tasks → Persistence".
+- Do not immediately run "rebuild graph" unless you confirm you want to regenerate all memories from the chat history.
+
+### Recall cards are not displayed
+
+- Confirm the target turn is a user message.
+- Confirm `message.extra.bme_recall.injectionText` is not empty.
+- Third-party themes must keep `#chat .mes` message nodes and stable turn-index attributes, such as `mesid`, `data-mesid`, or `data-message-id`.
+- After enabling debug logs, search for `[ST-BME] Recall Card UI`.
+
+### Direct Embedding fails
+
+- Check the API URL and model name.
+- Check the key.
+- Check browser CORS.
+- Prefer backend mode first.
diff --git a/docs/usage/troubleshooting.md b/docs/usage/troubleshooting.md
index 4ca1933..43ae90c 100644
--- a/docs/usage/troubleshooting.md
+++ b/docs/usage/troubleshooting.md
@@ -1,5 +1,7 @@
 # 排障指南
 
+**中文** · [English](troubleshooting.en.md)
+
 本文从 [README](../../README.md) 拆出 ST-BME 常见用户问题与处理方式，便于按症状快速定位。
 
 ### 面板打不开