obsidian-mcp: 初次落地 Obsidian Vault MCP Server (.NET 10, read+write)

把 Obsidian vault 通过 MCP 暴露给 Claude.ai，OAuth 走 nas-auth。
设计文档见 vault Coding/obsidian-mcp/obsidian-mcp 设计.md。
代码层落地参考 vault Coding/obsidian-mcp/MCP 实现指南.md。

V1+V2 同时实现（用户要求跳过分阶段直接全部）：

读 Tools（需 scope=read:obsidian）：
- list_vault_tree（一次性 vault 地图，限制深度）
- list_files / read_file（含 offset/limit 大文件分页）
- search（子串匹配 + glob 过滤，最多 50 hits）
- get_metadata（size / modified_at / has_frontmatter）

写 Tools（需 scope=write:obsidian）：
- write_file / append_file
- 多重门禁：scope 校验 + 路径黑名单 + 写入白名单 + 永禁文件
  - 永禁写：任意目录的 AGENTS.md / PROFILE.md / README.md / CLAUDE.md / 01-Secret/**
  - 白名单：02-ShengquGames/logs/ + Coding/ + NAS/NAS 待办清单.md
- 写入审计日志按天 rotate（JSON line）

安全：
- VaultPathResolver chroot：path traversal + symlink 双拒绝
- JwtBearer (HS256, Current+Previous fallback, MapInboundClaims=false)
- aud=obsidian, iss=https://auth.zhengchentao.win
- 黑名单：01-Secret / .obsidian / .trash / .git

技术栈：
- .NET 10 + ModelContextProtocol SDK 1.0
- Streamable HTTP transport (POST /mcp)
- JwtBearer 10.0 + IdentityModel.Tokens 8.x

部署：
- Dockerfile multi-stage，runtime 装 ripgrep（V3 备用），non-root user
- .gitea/workflows/build-image.yml：build + deploy 双 job，buildkit v0.13.2
- 容器内 :8080，宿主端口 9090
- 子域名 obs.zhengchentao.win
- vault 挂载 /volume1/docker/webdav/data/Zhengchen:/vault:rw（V2 写入需要 rw）

测试：35/35 单测过（VaultPathResolver path traversal/blacklist/symlink + VaultWriteGuard whitelist/forbidden）

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Tools/SearchTool.cs

@@ -0,0 +1,37 @@
+using System.ComponentModel;
+using ModelContextProtocol.Server;
+using ObsidianMcp.Auth;
+using ObsidianMcp.Services;
+
+namespace ObsidianMcp.Tools;
+
+[McpServerToolType]
+public class SearchTool(VaultSearchService searchSvc, IHttpContextAccessor http)
+{
+    [McpServerTool]
+    [Description(
+        "Full-text search the Obsidian vault using case-insensitive literal substring match. " +
+        "Does NOT support regex or wildcards in the query string. " +
+        "Returns up to 50 hits by default, each with file path, line number, and a preview snippet. " +
+        "Use the glob parameter to narrow the search to specific directories or file patterns. " +
+        "For exact file reading use read_file instead. " +
+        "Examples: search for 'docker compose' across all files, or 'Uam' within '02-ShengquGames/**/*.md'.")]
+    public async Task<List<SearchHit>> Search(
+        [Description("Literal substring to search for (case-insensitive). " +
+                     "e.g. 'docker compose', 'iptables PREROUTING', 'DOCKER_API_VERSION'")] string query,
+        [Description("Optional glob pattern to narrow files. " +
+                     "e.g. 'NAS/**/*.md', '02-ShengquGames/**', '*.md'. " +
+                     "Omit to search all .md files.")] string? glob = null,
+        [Description("Maximum number of results to return (default 50, max 200).")] int limit = 50)
+    {
+        ToolScopeGuard.EnsureScope(http, ScopePolicies.ReadObsidian);
+
+        if (string.IsNullOrWhiteSpace(query))
+            throw new ArgumentException("query 不能为空。");
+
+        if (limit <= 0) limit = 50;
+        if (limit > 200) limit = 200;
+
+        return await searchSvc.SearchAsync(query, glob, limit);
+    }
+}