feat: v0.3.0 - fix provider data loss, oauth corruption & switch UX

Bug fixes:
- Fix config.toml wiped to single provider on switch (now writes all providers)
- Fix managed:kimi-code oauth key corruption (oauth/kimi-code was rewritten
  to oauth/managed-kimi-code, breaking the official subscription)
- Fix default_model not switching due to React 18 deferred state update
  (updateConfig now sets configRef synchronously before setConfig)
- Strip KimiSwitch-private default_model from config.toml provider output

Architecture:
- config.toml is now the authoritative source for Kimi Code provider data
- SQLite stores only metadata (notes, official URLs, remembered models)
- Load reconciles config.toml with SQLite for external /provider changes
- Activate is a no-op for KimiCode (save already writes config.toml)

Features:
- Selected provider moves to top of list on switch
- Add models-dev context size lookup
- Add tauri-plugin-single-instance

Tests:
- 3 new regression tests: oauth key round-trip, all-providers write,
  private default_model strip

README.md

@@ -40,7 +40,7 @@
 Kimi Switch 提供统一的图形界面：
 
 - 统一图形界面，分别管理 Kimi Code 和 Pi 两套 Agent 配置，顶部 Tab 切换
-- 一键切换供应商，自动写入对应 Agent 的原生配置
+- 一键切换供应商，更新对应 Agent 原生配置的 `default_model`，保留全部供应商
 - 一键拉取模型列表（OpenAI / Anthropic / Google GenAI）
 - 切换后给出 `/reload` 提示，确保 Kimi Code 会话立即生效
 
@@ -96,10 +96,11 @@ Kimi Switch 提供统一的图形界面：
 
 **关键设计**：
 
-- Kimi Switch 维护自己的 SQLite 数据库存**完整配置**（所有供应商 + 所有模型，含未激活的）
+- 对 Kimi Code，`config.toml` 是供应商/模型数据的**权威来源**：所有供应商和模型始终全量保留，`default_model` 决定哪个生效（与 CLI 原生 `/provider` 行为一致）
-- 点「切换使用」时只把**当前激活的供应商**写入 Agent 原生配置，其他不写
+- SQLite 只存 Kimi Switch 专有元数据（备注、官网、每个供应商记住的默认模型），并在 `config.toml` 不完整时兜底
-- 这样 Kimi Code / Pi 始终只看到一个活跃供应商，不会被托管/OAuth 默认值干扰
+- 加载时以 `config.toml` 为准，因此通过 `/provider` 在 CLI 端增/改/删的供应商都会被正确反映，切换不再覆盖丢失
-- `raw_other` 字段透传未知键，保证前后往返不丢字段
+- `raw_other` 字段透传未知键（含 `[oauth]` 段），保证前后往返不丢字段
+- Pi 的行为不变：切换时仍只写活跃供应商到 `models.json`
 
 ## 支持的供应商类型
 
@@ -118,8 +119,8 @@ Kimi Switch 提供统一的图形界面：
 
 | 文件 | 用途 | 备份 |
 | --- | --- | --- |
-| `%USERPROFILE%\.kimi-switch\kimi-switch.db` | Kimi Switch 自己的 SQLite 数据库，存全量配置 | — |
+| `%USERPROFILE%\.kimi-switch\kimi-switch.db` | Kimi Switch 自己的 SQLite 数据库，存元数据（备注/官网/记住的模型）+ 迁移兜底 | — |
-| `%USERPROFILE%\.kimi-code\config.toml` | Kimi Code CLI 的 TOML 配置（**切换时写入**） | 同目录下 `backups/config.toml.bak.{YYYYMMDD_HHMMSS}`，保留 7 天 |
+| `%USERPROFILE%\.kimi-code\config.toml` | Kimi Code CLI 的 TOML 配置（**权威数据源，切换/保存时写入**） | 同目录下 `backups/config.toml.bak.{YYYYMMDD_HHMMSS}`，保留 7 天 |
 | `%USERPROFILE%\.pi\agent\models.json` | Pi 的供应商+模型配置（**切换时写入**） | 同目录下 `backups/models.json.bak.{YYYYMMDD_HHMMSS}`，保留 7 天 |
 | `%USERPROFILE%\.pi\agent\settings.json` | Pi 的默认供应商/模型（**切换时写入**） | 同目录下 `backups/settings.json.bak.{YYYYMMDD_HHMMSS}`，保留 7 天 |
 | `localStorage[kimi-switch-agent]` | 前端记住上次选中的 Agent（kimi_code / pi） | — |
@@ -213,9 +214,9 @@ npm run dev
 
 | 命令 | 说明 |
 | --- | --- |
-| `load_agent_config_command(agent)` | 加载配置：优先 SQLite，为空则从 Agent 原生配置导入 |
+| `load_agent_config_command(agent)` | 加载配置：Kimi Code 以 `config.toml` 为权威数据源，SQLite 补充元数据；Pi 优先 SQLite |
-| `save_agent_config_command(agent, config)` | 保存全量配置到 SQLite |
+| `save_agent_config_command(agent, config)` | 保存到 SQLite；Kimi Code 同时写入 `config.toml` |
-| `activate_agent_config_command(agent)` | 把当前激活的供应商写入 Agent 原生配置 |
+| `activate_agent_config_command(agent)` | 全量写入 Agent 原生配置（Kimi Code 写全部供应商，`default_model` 决定生效项；Pi 仅写活跃供应商） |
 | `open_agent_config_dir(agent)` | 用系统资源管理器打开 Agent 配置目录 |
 | `get_app_version()` | 返回 `Cargo.toml` 版本号 |
 | `list_provider_models(provider)` | 调供应商 API 拉取模型列表（异步） |
@@ -241,7 +242,7 @@ npm run dev
 
 | 快捷键 | 作用 |
 | --- | --- |
-| `Ctrl + S` | 保存当前修改到 SQLite |
+| `Ctrl + S` | 保存当前修改到 SQLite + config.toml（Kimi Code） |
 | `Ctrl + R` | 重新读取配置（未保存时会提示） |
 | `Ctrl + O` | 打开当前 Agent 的配置目录 |
 
@@ -303,7 +304,7 @@ A: 在 Kimi Code 会话里执行 `/reload`（Kimi Code CLI 才会重新读取 `~
 A: 关闭窗口前会弹原生 `beforeunload` 提示，标题栏也会显示 `*` 前缀。
 
 **Q: 怎么备份/迁移我的配置？**
-A: 备份 `%USERPROFILE%\.kimi-switch\kimi-switch.db` 即可，里面存了全量配置（含未激活的供应商）。
+A: 对 Kimi Code，`config.toml` 本身就是全量配置的权威来源，直接备份它即可；SQLite 存额外的备注/官网等元数据，需要时一并备份 `kimi-switch.db`。对 Pi，备份 `kimi-switch.db`。
 
 **Q: Vertex AI 为什么不能拉取模型列表？**
 A: Vertex 需要 GCP project/location 凭证，当前实现留了 TODO，等 GCP SDK 集成后再补。

README_EN.md

@@ -40,7 +40,7 @@
 Kimi Switch provides a unified GUI:
 
 - One unified interface to manage two separate agent configs (Kimi Code and Pi), switched via a top tab
-- One-click provider switching that writes the active provider into the target agent's native config
+- One-click provider switching that updates `default_model` in the target agent's native config while preserving all providers
 - One-click model-list fetching (OpenAI / Anthropic / Google GenAI)
 - A `/reload` hint after switching so Kimi Code sessions take effect immediately
 
@@ -96,10 +96,11 @@ Kimi Switch provides a unified GUI:
 
 **Key design points**:
 
-- Kimi Switch keeps its own SQLite database for the **full config** (all providers + all models, including inactive ones)
+- For Kimi Code, `config.toml` is the **authoritative source** for provider/model data: all providers and models are always written in full, and `default_model` selects the active one (matching the CLI's native `/provider` behaviour)
-- Clicking "Switch to" writes **only the active provider** into the agent's native config; the others are not written
+- SQLite stores only Kimi Switch-private metadata (notes, official URLs, per-provider remembered default model) and acts as a fallback when `config.toml` is incomplete
-- This way Kimi Code / Pi always see exactly one active provider and are never confused by managed/OAuth defaults
+- On load, `config.toml` takes precedence, so providers added/edited/deleted via the CLI's `/provider` are correctly reflected — switching no longer overwrites or loses them
-- The `raw_other` field passes unknown keys through untouched, so round-trips never lose fields
+- The `raw_other` field passes unknown keys through untouched (including `[oauth]` blocks), so round-trips never lose fields
+- Pi behaviour is unchanged: switching still writes only the active provider to `models.json`
 
 ## Supported Provider Types
 
@@ -118,8 +119,8 @@ Credential precedence: the `api_key` field wins over the same-named key in the `
 
 | File | Purpose | Backup |
 | --- | --- | --- |
-| `%USERPROFILE%\.kimi-switch\kimi-switch.db` | Kimi Switch's own SQLite database holding the full config | — |
+| `%USERPROFILE%\.kimi-switch\kimi-switch.db` | Kimi Switch's own SQLite database, holding metadata (notes/official URLs/remembered models) + migration fallback | — |
-| `%USERPROFILE%\.kimi-code\config.toml` | Kimi Code CLI's TOML config (**written on switch**) | `backups/config.toml.bak.{YYYYMMDD_HHMMSS}` next to it, kept 7 days |
+| `%USERPROFILE%\.kimi-code\config.toml` | Kimi Code CLI's TOML config (**authoritative source, written on switch/save**) | `backups/config.toml.bak.{YYYYMMDD_HHMMSS}` next to it, kept 7 days |
 | `%USERPROFILE%\.pi\agent\models.json` | Pi's provider+model config (**written on switch**) | `backups/models.json.bak.{YYYYMMDD_HHMMSS}` next to it, kept 7 days |
 | `%USERPROFILE%\.pi\agent\settings.json` | Pi's default provider/model (**written on switch**) | `backups/settings.json.bak.{YYYYMMDD_HHMMSS}` next to it, kept 7 days |
 | `localStorage[kimi-switch-agent]` | Frontend remembers the last selected agent (kimi_code / pi) | — |
@@ -213,9 +214,9 @@ Good for pure UI debugging.
 
 | Command | Description |
 | --- | --- |
-| `load_agent_config_command(agent)` | Load config: SQLite first, falling back to the agent's native config on first use |
+| `load_agent_config_command(agent)` | Load config: Kimi Code reads `config.toml` as the authoritative source, enriched with SQLite metadata; Pi reads SQLite first |
-| `save_agent_config_command(agent, config)` | Save the full config to SQLite |
+| `save_agent_config_command(agent, config)` | Save to SQLite; for Kimi Code also writes `config.toml` |
-| `activate_agent_config_command(agent)` | Write the active provider into the agent's native config |
+| `activate_agent_config_command(agent)` | Write to the agent's native config (Kimi Code writes all providers — `default_model` picks the active one; Pi writes only the active provider) |
 | `open_agent_config_dir(agent)` | Open the agent's config dir in the system file manager |
 | `get_app_version()` | Return the `Cargo.toml` version |
 | `list_provider_models(provider)` | Fetch model list from the provider API (async) |
@@ -241,7 +242,7 @@ Good for pure UI debugging.
 
 | Shortcut | Action |
 | --- | --- |
-| `Ctrl + S` | Save current changes to SQLite |
+| `Ctrl + S` | Save current changes to SQLite + config.toml (Kimi Code) |
 | `Ctrl + R` | Reload config (prompts if unsaved) |
 | `Ctrl + O` | Open the current agent's config dir |
 
@@ -303,7 +304,7 @@ A: Run `/reload` inside the Kimi Code session (the CLI only re-reads `~/.kimi-co
 A: A native `beforeunload` prompt appears before closing, and the title bar shows a `*` prefix.
 
 **Q: How do I back up / migrate my config?**
-A: Back up `%USERPROFILE%\.kimi-switch\kimi-switch.db`; it holds the full config (including inactive providers).
+A: For Kimi Code, `config.toml` itself is the authoritative full config — back it up directly. SQLite holds extra metadata (notes, official URLs); back up `kimi-switch.db` too if you need those. For Pi, back up `kimi-switch.db`.
 
 **Q: Why can't Vertex AI fetch the model list?**
 A: Vertex requires GCP project/location credentials. The current implementation leaves a TODO pending GCP SDK integration.

package.json

@@ -1,11 +1,13 @@
 {
   "name": "kimiswitch",
   "private": true,
-  "version": "0.2.0",
+  "version": "0.3.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
+    "prebuild": "node scripts/fetch-models-dev.mjs || echo fetch-models-dev failed, using existing snapshot",
     "build": "tsc && vite build",
+    "fetch-models-dev": "node scripts/fetch-models-dev.mjs",
     "preview": "vite preview",
     "tauri": "tauri",
     "tauri-dev": "tauri dev",

scripts/fetch-models-dev.mjs

@@ -0,0 +1,57 @@
+#!/usr/bin/env node
+/**
+ * Fetch the latest model reference data from models.dev and write a compact
+ * snapshot to src/lib/models-dev.json.
+ *
+ * Run manually (`npm run fetch-models-dev`) or automatically before builds
+ * (`prebuild`). Requires network access to models.dev.
+ */
+
+import { writeFile, mkdir } from "node:fs/promises";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const SOURCE_URL = "https://models.dev/models.json";
+const ROOT = join(dirname(fileURLToPath(import.meta.url)), "..");
+const OUTPUT = join(ROOT, "src", "lib", "models-dev.json");
+
+const res = await fetch(SOURCE_URL, {
+  headers: { Accept: "application/json" },
+  signal: AbortSignal.timeout(30_000),
+});
+if (!res.ok) {
+  throw new Error(`GET ${SOURCE_URL} returned HTTP ${res.status}`);
+}
+
+/** @type {Record<string, any>} */
+const raw = await res.json();
+
+// Keep only the fields the app needs; the raw file carries benchmarks,
+// descriptions, etc. that would bloat the bundle.
+const snapshot = {};
+for (const [key, m] of Object.entries(raw)) {
+  if (!m || typeof m !== "object") continue;
+  const entry = {};
+  if (typeof m.name === "string") entry.name = m.name;
+  // context 0 means "not applicable" (image/audio models) — treat as missing
+  // so callers fall back to regex defaults instead of storing 0.
+  if (typeof m.limit?.context === "number" && m.limit.context > 0) {
+    entry.context = m.limit.context;
+  }
+  if (m.reasoning === true) entry.reasoning = true;
+  if (m.tool_call === true) entry.tool_call = true;
+  if (m.structured_output === true) entry.structured_output = true;
+  const input = m.modalities?.input;
+  if (Array.isArray(input)) {
+    if (input.includes("image")) entry.image = true;
+    if (input.includes("video")) entry.video = true;
+  }
+  snapshot[key] = entry;
+}
+
+await mkdir(dirname(OUTPUT), { recursive: true });
+await writeFile(OUTPUT, JSON.stringify(snapshot, null, 2) + "\n", "utf8");
+
+console.log(
+  `models-dev snapshot: ${Object.keys(snapshot).length} models -> ${OUTPUT}`,
+);

src-tauri/Cargo.lock

@@ -1952,7 +1952,7 @@ dependencies = [
 
 [[package]]
 name = "kimiswitch"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1965,6 +1965,7 @@ dependencies = [
  "tauri",
  "tauri-build",
  "tauri-plugin-opener",
+ "tauri-plugin-single-instance",
  "toml 0.8.23",
 ]
 
@@ -3773,6 +3774,22 @@ dependencies = [
  "zbus",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "2.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3214becf9ef5783c0ae99a3bb25adf5353a7a16ebf53e74b909e29205735c6c"
+dependencies = [
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "windows-sys 0.60.2",
+ "zbus",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.11.3"
@@ -4883,6 +4900,15 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets 0.53.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.61.2"
@@ -4931,13 +4957,30 @@ dependencies = [
  "windows_aarch64_gnullvm 0.52.6",
  "windows_aarch64_msvc 0.52.6",
  "windows_i686_gnu 0.52.6",
- "windows_i686_gnullvm",
+ "windows_i686_gnullvm 0.52.6",
  "windows_i686_msvc 0.52.6",
  "windows_x86_64_gnu 0.52.6",
  "windows_x86_64_gnullvm 0.52.6",
  "windows_x86_64_msvc 0.52.6",
 ]
 
+[[package]]
+name = "windows-targets"
+version = "0.53.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4945f9f551b88e0d65f3db0bc25c33b8acea4d9e41163edf90dcd0b19f9069f3"
+dependencies = [
+ "windows-link 0.2.1",
+ "windows_aarch64_gnullvm 0.53.1",
+ "windows_aarch64_msvc 0.53.1",
+ "windows_i686_gnu 0.53.1",
+ "windows_i686_gnullvm 0.53.1",
+ "windows_i686_msvc 0.53.1",
+ "windows_x86_64_gnu 0.53.1",
+ "windows_x86_64_gnullvm 0.53.1",
+ "windows_x86_64_msvc 0.53.1",
+]
+
 [[package]]
 name = "windows-threading"
 version = "0.1.0"
@@ -4974,6 +5017,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9d8416fa8b42f5c947f8482c43e7d89e73a173cead56d044f6a56104a6d1b53"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
@@ -4992,6 +5041,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9d782e804c2f632e395708e99a94275910eb9100b2114651e04744e9b125006"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
@@ -5010,12 +5065,24 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "960e6da069d81e09becb0ca57a65220ddff016ff2d6af6a223cf372a506593a3"
+
 [[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa7359d10048f68ab8b09fa71c3daccfb0e9b559aed648a8f95469c27057180c"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
@@ -5034,6 +5101,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e7ac75179f18232fe9c285163565a57ef8d3c89254a30685b57d83a38d326c2"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
@@ -5052,6 +5125,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c3842cdd74a865a8066ab39c8a7a473c0778a3f29370b5fd6b4b9aa7df4a499"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
@@ -5070,6 +5149,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ffa179e2d07eee8ad8f57493436566c7cc30ac536a3379fdf008f47f6bb7ae1"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
@@ -5088,6 +5173,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
+
 [[package]]
 name = "winnow"
 version = "0.5.40"

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kimiswitch"
-version = "0.2.0"
+version = "0.3.0"
 description = "Kimi Switch - model config manager"
 authors = ["you"]
 edition = "2021"
@@ -11,6 +11,7 @@ tauri-build = { version = "2.0.0", features = [] }
 [dependencies]
 tauri = { version = "2.0.0", features = ["tray-icon"] }
 tauri-plugin-opener = "2.0.0"
+tauri-plugin-single-instance = "2.0.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 indexmap = { version = "2.2", features = ["serde"] }

src-tauri/src/commands.rs

@@ -18,15 +18,61 @@ pub fn debug_log(message: String) {
 
 #[tauri::command]
 pub fn load_agent_config_command(agent: Agent) -> Result<Config, String> {
-    // Load from Kimi Switch's own SQLite database first.
+    // Load Kimi Switch's own SQLite database (metadata + migration fallback).
-    match db::load_config(&agent) {
+    let db_config = db::load_config(&agent).ok();
-        Ok(config) if !config.providers.is_empty() => Ok(config),
+
-        _ => {
-            // Fallback to the agent's native config on first use.
     match agent {
-                Agent::KimiCode => crate::kimi_code_io::load_kimi_code_config_as_config()
+        Agent::KimiCode => {
-                    .map_err(fmt_anyhow),
+            // config.toml is the authoritative source for provider/model data
+            // because the user can add or edit providers at any time via the
+            // CLI's /provider command. SQLite only enriches with Kimi
+            // Switch-private metadata (note, official_url, remembered default
+            // model) and fills gaps when config.toml is incomplete.
+            let mut config = crate::kimi_code_io::load_kimi_code_config_as_config()
+                .map_err(fmt_anyhow)?;
+
+            if let Some(db) = &db_config {
+                // Enrich config.toml providers with SQLite metadata.
+                for (name, p) in config.providers.iter_mut() {
+                    if let Some(db_p) = db.providers.get(name) {
+                        p.note = db_p.note.clone();
+                        p.official_url = db_p.official_url.clone();
+                        // Restore the remembered per-provider default model
+                        // (Kimi-Switch-private, stored in raw_other).
+                        if let Some(dm) = db_p.raw_other.get("default_model") {
+                            match &mut p.raw_other {
+                                serde_json::Value::Object(obj) => {
+                                    obj.insert("default_model".to_string(), dm.clone());
+                                }
+                                _ => {
+                                    let mut obj = serde_json::Map::new();
+                                    obj.insert("default_model".to_string(), dm.clone());
+                                    p.raw_other = serde_json::Value::Object(obj);
+                                }
+                            }
+                        }
+                    }
+                }
+                // Migration safety: include providers/models that exist in
+                // SQLite but not in config.toml (e.g. after upgrading from the
+                // old single-provider-write behaviour).
+                for (name, p) in &db.providers {
+                    config.providers.entry(name.clone()).or_insert_with(|| p.clone());
+                }
+                for (alias, m) in &db.models {
+                    config.models.entry(alias.clone()).or_insert_with(|| m.clone());
+                }
+            }
+
+            Ok(config)
+        }
         Agent::Pi => {
+            // Pi: SQLite first, fall back to native config on first use.
+            if let Some(config) = db_config {
+                if !config.providers.is_empty() {
+                    return Ok(config);
+                }
+            }
             let file = pi_io::load_pi_models().map_err(fmt_anyhow)?;
             let mut config = pi_io::pi_file_to_config(&file);
             if config.default_model.is_none() {
@@ -45,26 +91,35 @@ pub fn load_agent_config_command(agent: Agent) -> Result<Config, String> {
             Ok(config)
         }
     }
-        }
-    }
 }
 
 #[tauri::command]
 pub fn save_agent_config_command(agent: Agent, config: Config) -> Result<(), String> {
     // Save the full Kimi Switch configuration to local SQLite.
-    db::save_config(&agent, &config).map_err(fmt_anyhow)
+    db::save_config(&agent, &config).map_err(fmt_anyhow)?;
+    // For Kimi Code, config.toml is the authoritative provider store, so
+    // persist changes there immediately — not only on activation. This
+    // ensures edits (Ctrl+S) survive a restart even without switching.
+    if matches!(agent, Agent::KimiCode) {
+        crate::kimi_code_io::save_config_as_kimi_code(&config).map_err(fmt_anyhow)?;
+    }
+    Ok(())
 }
 
 #[tauri::command]
 pub fn activate_agent_config_command(agent: Agent) -> Result<(), String> {
-    // Load the full config from SQLite and write only the active provider
+    match agent {
-    // to the agent's native config file.
+        Agent::KimiCode => {
+            // No-op: save_agent_config_command already writes config.toml for
+            // Kimi Code. Avoiding a second write here prevents a redundant disk
+            // write + backup on every switch.
+            Ok(())
+        }
+        Agent::Pi => {
+            // Load the full config from SQLite and write only the active
+            // provider to Pi's native config files.
             let config = db::load_config(&agent).map_err(fmt_anyhow)?;
             let active_config = build_active_config(&config);
-    match agent {
-        Agent::KimiCode => crate::kimi_code_io::save_config_as_kimi_code(&active_config)
-            .map_err(fmt_anyhow),
-        Agent::Pi => {
             let file = pi_io::config_to_pi_file(&active_config);
             pi_io::save_pi_models(&file).map_err(fmt_anyhow)?;
 
@@ -87,9 +142,10 @@ fn active_provider_and_model(config: &Config) -> Option<(String, String)> {
 }
 
 fn build_active_config(config: &Config) -> Config {
-    // Only the provider explicitly marked as active is written to the agent's
+    // Used only by Pi: writes only the provider explicitly marked as active
-    // native config. This ensures Kimi Code / Pi follow Kimi Switch's choice
+    // to Pi's native config so Pi follows Kimi Switch's selection instead of
-    // instead of falling back to a managed/native provider.
+    // falling back to another provider. Kimi Code does not use this — it
+    // writes all providers and selects via default_model.
     let providers: IndexMap<String, Provider> = config
         .providers
         .iter()

src-tauri/src/kimi_code_io.rs

@@ -174,8 +174,13 @@ pub fn kimi_code_to_config(value: &TomlValue) -> Config {
                 rest.remove("api_key");
                 rest.remove("managed");
                 rest.remove("enabled");
-                rest.remove("oauth");
                 rest.remove("env");
+                // NOTE: `oauth` is intentionally kept in raw_other so that the
+                // exact `storage`/`key` block round-trips verbatim on export.
+                // Previously it was stripped here and regenerated on export
+                // with a key derived from the provider name, which corrupted
+                // the managed:kimi-code credential reference (e.g.
+                // "oauth/kimi-code" became "oauth/managed-kimi-code").
                 toml_value_to_json(&TomlValue::Table(rest))
             };
 
@@ -234,11 +239,10 @@ pub fn config_to_kimi_code(config: &Config, existing: Option<&TomlValue>) -> Tom
 
     let mut providers_table = Table::new();
     for (name, provider) in &config.providers {
-        // Only write the active provider to Kimi Code config so the agent
+        // Write ALL providers to Kimi Code config. The active provider is
-        // follows Kimi Switch's selection.
+        // selected via `default_model`, so keeping the full list matches the
-        if !provider.active {
+        // CLI's native multi-provider behavior and prevents data loss when
-            continue;
+        // switching.
-        }
         let mut pt = Table::new();
         pt.insert("type".to_string(), TomlValue::String(provider.provider_type.as_str().to_string()));
         if let Some(base_url) = provider.base_url.clone().filter(|s| !s.is_empty()) {
@@ -273,6 +277,10 @@ pub fn config_to_kimi_code(config: &Config, existing: Option<&TomlValue>) -> Tom
         if let TomlValue::Table(mut extra) = json_to_toml(&provider.raw_other).unwrap_or(TomlValue::Table(Table::new())) {
             extra.remove("oauth");
             extra.remove("env");
+            // Strip Kimi-Switch-private field: the remembered per-provider
+            // default model is stored in raw_other.default_model and must NOT
+            // leak into the agent's config.toml.
+            extra.remove("default_model");
             for (k, v) in extra {
                 pt.insert(k, v);
             }
@@ -281,19 +289,10 @@ pub fn config_to_kimi_code(config: &Config, existing: Option<&TomlValue>) -> Tom
     }
     root.insert("providers".to_string(), TomlValue::Table(providers_table));
 
-    // Collect provider names that survived the filter above.
+    // Write all models — each provider's models are kept so the CLI's
-    let active_provider_names: std::collections::HashSet<&str> = config
+    // /provider command can list and switch between them.
-        .providers
-        .values()
-        .filter(|p| p.active)
-        .map(|p| p.name.as_str())
-        .collect();
-
     let mut models_table = Table::new();
     for (alias, model) in &config.models {
-        if !active_provider_names.contains(model.provider.as_str()) {
-            continue;
-        }
         let mut mt = Table::new();
         mt.insert("provider".to_string(), TomlValue::String(model.provider.clone()));
         mt.insert("model".to_string(), TomlValue::String(model.model.clone()));
@@ -587,4 +586,140 @@ api_key = ""
             }
         }
     }
+
+    #[test]
+    fn kimi_code_oauth_key_roundtrip() {
+        // Regression: importing then exporting managed:kimi-code must preserve
+        // the exact oauth key "oauth/kimi-code". Previously the oauth block
+        // was dropped on import and regenerated on export as
+        // "oauth/managed-kimi-code", breaking the official subscription.
+        let toml_str = r#"
+default_model = "kimi-code/k3"
+
+[providers."managed:kimi-code"]
+type = "kimi"
+api_key = ""
+base_url = "https://api.kimi.com/coding/v1"
+
+[providers."managed:kimi-code".oauth]
+storage = "file"
+key = "oauth/kimi-code"
+
+[models."kimi-code/k3"]
+provider = "managed:kimi-code"
+model = "k3"
+max_context_size = 1048576
+"#;
+        let value: TomlValue = toml_str.parse().unwrap();
+        let config = kimi_code_to_config(&value);
+
+        // Export back to TOML.
+        let exported = config_to_kimi_code(&config, None);
+        let root = exported.as_table().unwrap();
+        let providers = root.get("providers").unwrap().as_table().unwrap();
+        let managed = providers.get("managed:kimi-code").unwrap().as_table().unwrap();
+        let oauth = managed.get("oauth").unwrap().as_table().unwrap();
+        assert_eq!(
+            oauth.get("key").and_then(|v| v.as_str()),
+            Some("oauth/kimi-code"),
+            "oauth key must round-trip verbatim, not be regenerated"
+        );
+        assert_eq!(
+            oauth.get("storage").and_then(|v| v.as_str()),
+            Some("file")
+        );
+    }
+
+    #[test]
+    fn kimi_code_export_writes_all_providers() {
+        // Regression: inactive providers must still be written to config.toml
+        // so that switching does not wipe the provider list.
+        let mut providers = IndexMap::new();
+        providers.insert(
+            "active-one".to_string(),
+            Provider {
+                name: "active-one".to_string(),
+                provider_type: ProviderType::Anthropic,
+                base_url: Some("https://a.example.com".to_string()),
+                api_key: Some("sk-a".to_string()),
+                env: IndexMap::new(),
+                note: None,
+                official_url: None,
+                managed: false,
+                enabled: true,
+                active: true,
+                raw_other: Value::Null,
+            },
+        );
+        providers.insert(
+            "inactive-one".to_string(),
+            Provider {
+                name: "inactive-one".to_string(),
+                provider_type: ProviderType::Openai,
+                base_url: Some("https://b.example.com".to_string()),
+                api_key: Some("sk-b".to_string()),
+                env: IndexMap::new(),
+                note: None,
+                official_url: None,
+                managed: false,
+                enabled: true,
+                active: false,
+                raw_other: Value::Null,
+            },
+        );
+        let config = Config {
+            default_model: None,
+            providers,
+            models: IndexMap::new(),
+            raw_other: Value::Null,
+        };
+
+        let exported = config_to_kimi_code(&config, None);
+        let root = exported.as_table().unwrap();
+        let providers_table = root.get("providers").unwrap().as_table().unwrap();
+        assert_eq!(providers_table.len(), 2, "both providers must be written");
+        assert!(providers_table.contains_key("active-one"));
+        assert!(providers_table.contains_key("inactive-one"));
+    }
+
+    #[test]
+    fn kimi_code_export_strips_private_default_model() {
+        // The remembered per-provider default model (raw_other.default_model)
+        // is a Kimi-Switch-private field and must NOT leak into config.toml.
+        let mut providers = IndexMap::new();
+        providers.insert(
+            "p".to_string(),
+            Provider {
+                name: "p".to_string(),
+                provider_type: ProviderType::Anthropic,
+                base_url: None,
+                api_key: Some("sk-x".to_string()),
+                env: IndexMap::new(),
+                note: None,
+                official_url: None,
+                managed: false,
+                enabled: true,
+                active: true,
+                raw_other: serde_json::json!({"default_model": "some-alias"}),
+            },
+        );
+        let config = Config {
+            default_model: None,
+            providers,
+            models: IndexMap::new(),
+            raw_other: Value::Null,
+        };
+
+        let exported = config_to_kimi_code(&config, None);
+        let root = exported.as_table().unwrap();
+        let provider = root
+            .get("providers").unwrap()
+            .as_table().unwrap()
+            .get("p").unwrap()
+            .as_table().unwrap();
+        assert!(
+            !provider.contains_key("default_model"),
+            "private default_model must not leak into config.toml"
+        );
+    }
 }

src-tauri/src/lib.rs

@@ -11,6 +11,16 @@ use tauri::Manager;
 
 pub fn run() {
     tauri::Builder::default()
+        // Single instance: must be registered before other plugins. When a
+        // second process is launched, this callback runs in the existing
+        // instance and simply brings its window back (including from tray).
+        .plugin(tauri_plugin_single_instance::init(|app, _args, _cwd| {
+            if let Some(window) = app.get_webview_window("main") {
+                let _ = window.unminimize();
+                let _ = window.show();
+                let _ = window.set_focus();
+            }
+        }))
         .plugin(tauri_plugin_opener::init())
         .setup(|app| {
             println!("[Tauri] Setup started");

src-tauri/tauri.conf.json

@@ -1,6 +1,6 @@
 {
   "productName": "Kimi Switch",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "identifier": "com.kimiswitch.app",
   "build": {
     "beforeDevCommand": "npm run dev",

src/App.tsx

@@ -6,6 +6,7 @@ import { ProviderList } from "./components/ProviderList";
 import { ProviderEdit } from "./components/ProviderEdit";
 import { useTranslation } from "./i18n";
 import { getDefaultMaxContextSize } from "./lib/model-defaults";
+import { getModelRef } from "./lib/models-dev";
 import type { Agent, Model, Provider } from "./types";
 
 const AGENT_STORAGE_KEY = "kimi-switch-agent";
@@ -242,26 +243,31 @@ export default function App() {
         }
       }
 
-      // Only the selected provider is active. All other providers (including
+      // Rebuild providers with the selected one moved to the front so it is
-      // Kimi native/managed and custom) are deactivated so the target agent
+      // visually prioritised. All others are deactivated.
-      // follows Kimi Switch's choice exactly.
       const providers: Record<string, Provider> = {};
-      for (const [key, p] of Object.entries(cfg.providers)) {
+      providers[name] = { ...target, active: true };
-        providers[key] = { ...p, active: key === name };
-      }
 
-      // Remember the active provider's current default model (if it belongs to
+      // Remember the old active provider's current default model (if it
-      // that provider) so switching back later restores the user's choice.
+      // belongs to that provider) so switching back later restores the user's
-      if (activeProviderName && cfg.default_model) {
+      // choice.
-        const activeProvider = providers[activeProviderName];
+      if (activeProviderName && activeProviderName !== name && cfg.default_model) {
-        if (activeProvider && cfg.models[cfg.default_model]?.provider === activeProviderName) {
+        const oldActive = cfg.providers[activeProviderName];
+        if (oldActive && cfg.models[cfg.default_model]?.provider === activeProviderName) {
           providers[activeProviderName] = setProviderDefaultModel(
-            activeProvider,
+            { ...oldActive, active: false },
             cfg.default_model
           );
         }
       }
 
+      // Add remaining providers (skip selected and old-active if already added).
+      for (const [key, p] of Object.entries(cfg.providers)) {
+        if (key === name) continue;
+        if (providers[key]) continue;
+        providers[key] = { ...p, active: false };
+      }
+
       // Prefer the target provider's remembered default model; fall back to
       // its first model when there is no saved preference or it is invalid.
       let default_model = getProviderDefaultModel(target);
@@ -315,7 +321,10 @@ export default function App() {
           ...m,
           alias,
           provider: provider.name,
-          max_context_size: m.max_context_size ?? getDefaultMaxContextSize(m.model),
+          max_context_size:
+            m.max_context_size ??
+            getModelRef(m.model)?.context ??
+            getDefaultMaxContextSize(m.model),
         };
       }
 

src/components/ProviderEdit.tsx

@@ -3,6 +3,7 @@ import { invoke } from "@tauri-apps/api/core";
 import { useTranslation } from "../i18n";
 import type { TranslationKey } from "../i18n/zh";
 import { getDefaultMaxContextSize } from "../lib/model-defaults";
+import { capabilitiesFromRef, getModelRef } from "../lib/models-dev";
 import { AgentSettingsPanel } from "./AgentSettingsPanel";
 import type { Agent, DiscoveredModel, Model, Provider, ProviderType } from "../types";
 
@@ -400,15 +401,24 @@ function ModelMapping({
     for (const dm of discovered) {
       if (!selected.has(dm.id)) continue;
       const alias = dm.id.replace(/[^a-zA-Z0-9_-]/g, "-");
-      const max_context_size = dm.max_context_size ?? getDefaultMaxContextSize(dm.id);
+      const ref = getModelRef(dm.id);
+      // Priority: API-provided value > models.dev reference > regex fallback
+      const max_context_size =
+        dm.max_context_size ?? ref?.context ?? getDefaultMaxContextSize(dm.id);
       toAdd.push({
         alias,
         provider: provider.name,
         model: dm.id,
         max_context_size,
-        display_name: dm.display_name,
+        display_name: dm.display_name ?? ref?.name ?? null,
         supports_1m: max_context_size >= 1_000_000,
-        capabilities: fetchThinking ? ["thinking"] : [],
+        // Reference data wins when available; otherwise keep the old
+        // fetchThinking-checkbox behavior as the fallback.
+        capabilities: ref
+          ? capabilitiesFromRef(ref)
+          : fetchThinking
+            ? ["thinking"]
+            : [],
       });
     }
     onBulkAdd(toAdd);

src/hooks/useConfig.ts

@@ -48,11 +48,16 @@ export function useConfig(agent: Agent): UseConfigReturn {
   }, [refresh]);
 
   const updateConfig = useCallback((updater: (config: Config) => Config) => {
-    setConfig((prev) => {
+    // Compute next state synchronously from the ref (always current) and set
-      const next = prev ? updater(prev) : prev;
+    // the ref BEFORE setConfig. Previously the ref was updated inside the
+    // setConfig updater, which React 18 defers — so save() reading the ref
+    // immediately after would get a stale value.
+    const prev = configRef.current;
+    if (prev) {
+      const next = updater(prev);
       configRef.current = next;
-      return next;
+      setConfig(next);
-    });
+    }
     setDirty(true);
   }, []);
 

src/lib/models-dev.ts

@@ -0,0 +1,57 @@
+import snapshot from "./models-dev.json";
+
+/**
+ * Compact per-model reference data from models.dev
+ * (see scripts/fetch-models-dev.mjs).
+ */
+export interface ModelRef {
+  name?: string;
+  context?: number;
+  reasoning?: boolean;
+  tool_call?: boolean;
+  structured_output?: boolean;
+  image?: boolean;
+  video?: boolean;
+}
+
+const data: Record<string, ModelRef> = snapshot;
+
+// models.dev keys are "<lab>/<model>" and may be mixed-case (e.g.
+// "minimax/MiniMax-M3"), while provider APIs return bare model ids
+// (e.g. "kimi-k2.5"). Index lowercase for tolerant matching.
+const byLowerKey: Record<string, ModelRef> = {};
+for (const [key, value] of Object.entries(data)) {
+  byLowerKey[key.toLowerCase()] = value;
+}
+
+/**
+ * Look up reference data for a provider model id.
+ * Matches exact key first, then any "<lab>/<id>" suffix.
+ * Returns undefined when nothing matches — callers fall back to
+ * getDefaultMaxContextSize / manual capabilities.
+ */
+export function getModelRef(modelId: string): ModelRef | undefined {
+  const id = modelId.trim().toLowerCase();
+  if (!id) return undefined;
+  const exact = byLowerKey[id];
+  if (exact) return exact;
+  const suffix = `/${id}`;
+  for (const [key, value] of Object.entries(byLowerKey)) {
+    if (key.endsWith(suffix)) return value;
+  }
+  return undefined;
+}
+
+/**
+ * Map reference data to Kimi Code capability flags.
+ * Multimodal (image_in/video_in) comes from models.dev input modalities;
+ * always_thinking cannot be derived and stays manual.
+ */
+export function capabilitiesFromRef(ref: ModelRef): string[] {
+  const caps: string[] = [];
+  if (ref.reasoning) caps.push("thinking");
+  if (ref.tool_call) caps.push("tool_use");
+  if (ref.image) caps.push("image_in");
+  if (ref.video) caps.push("video_in");
+  return caps;
+}