Initial public release

MCP (Model Context Protocol) server for reading and writing an Obsidian vault, gated by OAuth-issued JWT bearer tokens. See README.md for setup.
2026-05-17 23:53:00 +08:00
commit 515763bc72
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+using System.ComponentModel;
+using ModelContextProtocol.Server;
+using ObsidianMcp.Auth;
+using ObsidianMcp.Services;
+
+namespace ObsidianMcp.Tools;
+
+[McpServerToolType]
+public class GetMetadataTool(VaultPathResolver resolver, IHttpContextAccessor http)
+{
+    [McpServerTool]
+    [Description(
+        "Get metadata for a vault file without reading its content. " +
+        "Returns size in bytes, last modified timestamp (UTC ISO-8601), " +
+        "and whether the file starts with YAML frontmatter (--- ... ---). " +
+        "Useful for deciding whether to read a file (staleness check, size guard before read_file).")]
+    public FileMetadata GetMetadata(
+        [Description("Vault-relative path to the file. " +
+                     "e.g. 'Notes/index.md'")] string path)
+    {
+        ToolScopeGuard.EnsureScope(http, ScopePolicies.ReadObsidian);
+
+        var absPath = resolver.Resolve(path);
+
+        if (!File.Exists(absPath))
+            throw new FileNotFoundException($"文件不存在：{path}");
+
+        var fi = new FileInfo(absPath);
+
+        // 简单判断是否有 frontmatter：读前 4 字节检查是否以 --- 开头
+        bool hasFrontmatter = false;
+        try
+        {
+            using var fs = File.OpenRead(absPath);
+            var header = new byte[4];
+            if (fs.Read(header, 0, 4) == 4)
+                hasFrontmatter = header[0] == '-' && header[1] == '-' && header[2] == '-';
+        }
+        catch
+        {
+            // 读取失败不影响其他字段
+        }
+
+        return new FileMetadata
+        {
+            Path = path,
+            SizeBytes = fi.Length,
+            ModifiedAt = fi.LastWriteTimeUtc.ToString("O"),
+            HasFrontmatter = hasFrontmatter,
+        };
+    }
+}
+
+public class FileMetadata
+{
+    public string Path { get; set; } = "";
+    public long SizeBytes { get; set; }
+    public string ModifiedAt { get; set; } = "";
+    public bool HasFrontmatter { get; set; }
+}