docs(providers): mark Antigravity model selection as supported

Antigravity gained --model in agy 1.0.6 (MUL-3125). Update the provider
matrix + prose (en/zh/ja/ko) from "managed internally / no --model" to
dynamic discovery via `agy models`, and refresh the now-stale picker
comments. Flag the display-string (not slug) shape and agy's silent no-op
on unrecognised values.

Co-authored-by: multica-agent <github@multica.ai>

apps/docs/content/docs/providers.ja.mdx

@@ -13,7 +13,7 @@ Multica は **12 個の AI コーディングツール**を標準でサポート
 
 | ツール | ベンダー | セッション再開 | MCP | スキル注入パス | モデル選択 |
 |---|---|---|---|---|---|
-| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | Antigravity CLI 自体の内部で管理 |
+| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | 動的探索（`agy models`） |
 | **Claude Code** | Anthropic | ✅ | **✅（実際に使用する唯一のツール）** | `.claude/skills/` | 静的 + flag |
 | **Codex** | OpenAI | ⚠️ コードは存在するが到達不可 | ❌ | `$CODEX_HOME/skills/` | 静的 |
 | **Copilot** | GitHub | ✅ | ❌ | `.github/skills/` | 静的（アカウントの権限で決定） |
@@ -30,7 +30,7 @@ Multica は **12 個の AI コーディングツール**を標準でサポート
 
 ### Antigravity
 
-Google が提供します。CLI バイナリ名は `agy` です。Google の Antigravity サービスと連携し、Gemini ベースのデフォルトモデルが付属しています。**セッション再開が動作します** — `--conversation <id>` を通じて行われ、stdout が構造化されたイベントストリームではなくプレーンテキストであるため、デーモンが CLI のログファイルから conversation UUID をキャプチャします。`--model` flag はありません — モデル選択は Antigravity CLI の設定内にあるため、Multica はこのプロバイダーに対してエージェントごとのモデルピッカーを無効にします。スキルは `.agents/skills/` に配置されます（CLI が Gemini CLI のワークスペーススキルレイアウトをそのまま継承します — [Antigravity 移行ドキュメント](https://antigravity.google/docs/gcli-migration)を参照）。
+Google が提供します。CLI バイナリ名は `agy` です。Google の Antigravity サービスと連携し、Gemini ベースのデフォルトモデルが付属しています。**セッション再開が動作します** — `--conversation <id>` を通じて行われ、stdout が構造化されたイベントストリームではなくプレーンテキストであるため、デーモンが CLI のログファイルから conversation UUID をキャプチャします。**モデル選択が動作します** — `--model` flag（agy 1.0.6 で追加）を通じて行われ、デーモンが `agy models` でカタログを列挙し、選択された値をそのまま渡します。これらは `provider/model` slug ではなく `Claude Opus 4.6 (Thinking)` のような人間が読める表示名である点に注意してください。また agy は認識できない値を渡すと黙って空実行するため、手入力ではなく検出されたリストから選ぶことをおすすめします。スキルは `.agents/skills/` に配置されます（CLI が Gemini CLI のワークスペーススキルレイアウトをそのまま継承します — [Antigravity 移行ドキュメント](https://antigravity.google/docs/gcli-migration)を参照）。
 
 ### Claude Code
 

apps/docs/content/docs/providers.ko.mdx

@@ -13,7 +13,7 @@ Multica는 **12개의 AI 코딩 도구**를 기본 지원합니다. 이들은
 
 | 도구 | 공급사 | 세션 재개 | MCP | 스킬 주입 경로 | 모델 선택 |
 |---|---|---|---|---|---|
-| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | Antigravity CLI 자체 내부에서 관리 |
+| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | 동적 탐색(`agy models`) |
 | **Claude Code** | Anthropic | ✅ | ✅ | `.claude/skills/` | 정적 + flag |
 | **Codex** | OpenAI | ⚠️ 코드는 존재하지만 도달 불가 | ✅ | `$CODEX_HOME/skills/` | 정적 |
 | **Copilot** | GitHub | ✅ | ❌ | `.github/skills/` | 정적 (계정 권한으로 결정) |
@@ -30,7 +30,7 @@ Multica는 **12개의 AI 코딩 도구**를 기본 지원합니다. 이들은
 
 ### Antigravity
 
-Google에서 제공합니다. CLI 바이너리 이름은 `agy`입니다. Google의 Antigravity 서비스와 연동되며 Gemini 기반의 기본 모델을 함께 제공합니다. **세션 재개가 동작합니다** — `--conversation <id>`를 통해서이며, stdout이 구조화된 이벤트 스트림이 아니라 일반 텍스트이기 때문에 데몬이 CLI의 로그 파일에서 conversation UUID를 캡처합니다. `--model` flag는 없습니다 — 모델 선택은 Antigravity CLI 설정 안에 있으므로, Multica는 이 제공자에 대해 에이전트별 모델 선택기를 비활성화합니다. 스킬은 `.agents/skills/`에 들어갑니다(CLI가 Gemini CLI의 워크스페이스 스킬 레이아웃을 그대로 따릅니다 — [Antigravity 마이그레이션 문서](https://antigravity.google/docs/gcli-migration) 참고).
+Google에서 제공합니다. CLI 바이너리 이름은 `agy`입니다. Google의 Antigravity 서비스와 연동되며 Gemini 기반의 기본 모델을 함께 제공합니다. **세션 재개가 동작합니다** — `--conversation <id>`를 통해서이며, stdout이 구조화된 이벤트 스트림이 아니라 일반 텍스트이기 때문에 데몬이 CLI의 로그 파일에서 conversation UUID를 캡처합니다. **모델 선택이 동작합니다** — `--model` flag(agy 1.0.6에서 추가)를 통해서이며, 데몬이 `agy models`로 카탈로그를 열거하고 선택된 값을 그대로 전달합니다. 이 값들은 `provider/model` slug가 아니라 `Claude Opus 4.6 (Thinking)` 같은 사람이 읽는 표시 이름이라는 점에 유의하세요. 또한 agy는 인식할 수 없는 값을 받으면 조용히 빈 실행을 하므로, 직접 입력하기보다 발견된 목록에서 선택하는 것을 권장합니다. 스킬은 `.agents/skills/`에 들어갑니다(CLI가 Gemini CLI의 워크스페이스 스킬 레이아웃을 그대로 따릅니다 — [Antigravity 마이그레이션 문서](https://antigravity.google/docs/gcli-migration) 참고).
 
 ### Claude Code
 

apps/docs/content/docs/providers.mdx

@@ -13,7 +13,7 @@ For guidance on picking a tool when creating an agent, see [Creating and configu
 
 | Tool | Vendor | Session resumption | MCP | Skill injection path | Model selection |
 |---|---|---|---|---|---|
-| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | Managed inside the Antigravity CLI itself |
+| **Antigravity** | Google | ✅ (`--conversation <id>`) | ❌ | `.agents/skills/` | Dynamic discovery (`agy models`) |
 | **Claude Code** | Anthropic | ✅ | ✅ | `.claude/skills/` | Static + flag |
 | **Codex** | OpenAI | ⚠️ Code exists but unreachable | ✅ | `$CODEX_HOME/skills/` | Static |
 | **Copilot** | GitHub | ✅ | ❌ | `.github/skills/` | Static (determined by account entitlement) |
@@ -30,7 +30,7 @@ For guidance on picking a tool when creating an agent, see [Creating and configu
 
 ### Antigravity
 
-From Google. CLI binary name is `agy`. Pairs with Google's Antigravity service and ships with a Gemini-backed default model. **Session resumption works** via `--conversation <id>`; the daemon captures the conversation UUID from the CLI's log file because stdout is plain text rather than a structured event stream. There is no `--model` flag — model selection lives inside the Antigravity CLI settings, so Multica disables the per-agent model picker for this provider. Skills land in `.agents/skills/` (the CLI inherits Gemini CLI's workspace skill layout — see [Antigravity migration docs](https://antigravity.google/docs/gcli-migration)).
+From Google. CLI binary name is `agy`. Pairs with Google's Antigravity service and ships with a Gemini-backed default model. **Session resumption works** via `--conversation <id>`; the daemon captures the conversation UUID from the CLI's log file because stdout is plain text rather than a structured event stream. **Model selection works** via the `--model` flag (added in agy 1.0.6): the daemon enumerates the catalog with `agy models` and ships the chosen value verbatim. Note these are human display strings such as `Claude Opus 4.6 (Thinking)`, not `provider/model` slugs — and agy silently no-ops on a value it doesn't recognise, so prefer picking from the discovered list over typing a custom one. Skills land in `.agents/skills/` (the CLI inherits Gemini CLI's workspace skill layout — see [Antigravity migration docs](https://antigravity.google/docs/gcli-migration)).
 
 ### Claude Code
 

apps/docs/content/docs/providers.zh.mdx

@@ -13,7 +13,7 @@ Multica 内置支持 **12 款 AI 编程工具**。它们都实现了同一套接
 
 | 工具 | 厂商 | 会话恢复 | MCP | Skill 注入路径 | 模型选择 |
 |---|---|---|---|---|---|
-| **Antigravity** | Google | ✅（`--conversation <id>`）| ❌ | `.agents/skills/` | 由 Antigravity CLI 自己管理 |
+| **Antigravity** | Google | ✅（`--conversation <id>`）| ❌ | `.agents/skills/` | 动态发现（`agy models`）|
 | **Claude Code** | Anthropic | ✅ | ✅ | `.claude/skills/` | 静态 + flag |
 | **Codex** | OpenAI | ⚠️ 代码存在但不可达 | ✅ | `$CODEX_HOME/skills/` | 静态 |
 | **Copilot** | GitHub | ✅ | ❌ | `.github/skills/` | 静态（账号权益决定）|
@@ -30,7 +30,7 @@ Multica 内置支持 **12 款 AI 编程工具**。它们都实现了同一套接
 
 ### Antigravity
 
-Google 出品。CLI 二进制名为 `agy`，搭配 Google Antigravity 服务，默认走 Gemini 系列模型。**会话恢复真用**——通过 `--conversation <id>`；因为 stdout 是纯文本而非结构化事件流，守护进程从 CLI 的日志文件里抓取 conversation UUID。CLI 没有 `--model` flag——模型选择保存在 Antigravity 自己的设置里，因此 Multica 禁用了这款工具的模型选择控件。Skill 文件写入 `.agents/skills/`（CLI 沿用 Gemini CLI 的 workspace 布局——见 [Antigravity 迁移文档](https://antigravity.google/docs/gcli-migration)）。
+Google 出品。CLI 二进制名为 `agy`，搭配 Google Antigravity 服务，默认走 Gemini 系列模型。**会话恢复真用**——通过 `--conversation <id>`；因为 stdout 是纯文本而非结构化事件流，守护进程从 CLI 的日志文件里抓取 conversation UUID。**模型选择真用**——通过 `--model` flag（agy 1.0.6 新增）：守护进程用 `agy models` 枚举可选项，并把选中的值原样传入。注意这些是 `Claude Opus 4.6 (Thinking)` 这样的人类可读显示名，而非 `provider/model` slug；而且 agy 遇到无法识别的值会静默空跑，所以优先从发现列表里挑选，不要手填。Skill 文件写入 `.agents/skills/`（CLI 沿用 Gemini CLI 的 workspace 布局——见 [Antigravity 迁移文档](https://antigravity.google/docs/gcli-migration)）。
 
 ### Claude Code
 

packages/views/agents/components/inspector/model-picker.tsx

@@ -19,10 +19,11 @@ import { useT } from "../../../i18n";
  * it fits a single PropRow. Drops the "select a runtime first" state because
  * the inspector only renders this picker after a runtime is bound.
  *
- * Unsupported providers (e.g. antigravity, whose `agy` CLI has no
- * `--model` flag and reads model selection from its own settings) render
- * an inert italic "Managed by runtime" label instead of a clickable
- * picker — the back-end ignores agent.model for those runtimes anyway.
+ * Providers whose runtime ignores per-agent model selection report
+ * `supported=false` and render an inert italic "Managed by runtime" label
+ * instead of a clickable picker. No built-in provider sets this today
+ * (Antigravity gained `--model` in agy 1.0.6), but the branch stays for any
+ * future model-less runtime.
  */
 export function ModelPicker({
   runtimeId,

packages/views/agents/components/model-dropdown.tsx

@@ -17,11 +17,11 @@ import { useT } from "../../i18n";
 // ModelDropdown renders a searchable, creatable model picker for an agent.
 // It fetches the supported-model catalog from the selected runtime — the
 // daemon enumerates models on demand via heartbeat piggyback. Providers
-// that don't honour per-agent model selection at runtime (currently
-// antigravity — `agy` has no `--model` flag and reads selection from
-// its own settings) return supported=false, and the dropdown renders
-// disabled with an explanation instead of silently accepting a value
-// the backend would ignore.
+// whose runtime ignores per-agent model selection return supported=false,
+// and the dropdown renders disabled with an explanation instead of silently
+// accepting a value the backend would ignore. No built-in provider does so
+// today — Antigravity gained `--model` in agy 1.0.6 — but the path stays for
+// any future model-less runtime.
 export function ModelDropdown({
   runtimeId,
   runtimeOnline,