gitea-mcp: 初次落地 Gitea MCP Server (.NET 10, V1 only-read)

把 Gitea (git.zhengchentao.win) 通过 MCP 暴露给 Claude.ai：列 repo、读代码、看 commits / issues / PR / orgs / packages / actions。
设计文档见 vault Coding/gitea-mcp/gitea-mcp 设计.md。
代码模板复用 obsidian-mcp（.NET 10 + ModelContextProtocol SDK + JwtBearer）。

19 个只读 Tool（全部 scope=read:gitea）：

Repo / 文件：
- list_repos / read_repo
- list_tree（max_entries=500 防爆）
- read_file（max_bytes=1MB，超出 truncated=true）
- search_code（走 /repos/search-code，indexer 未启用时返回结构化错误说明）

分支 / 提交：
- list_branches / list_commits / read_commit（diff 文件数限 50）

Issue / PR：
- list_issues / read_issue（含评论）
- list_pulls / read_pull（含评论 + 改动文件列表）

Org / Package（用户额外授权 read:organization + read:package）：
- list_orgs / read_org
- list_packages / read_package

Gitea Actions（运维友好）：
- list_workflow_runs / read_run_log

技术栈：
- .NET 10 + ModelContextProtocol SDK 1.0
- HttpClientFactory + Microsoft.Extensions.Http.Resilience（指数 backoff，5xx/429/网络错误重试）
- JwtBearer (HS256, Current+Previous fallback, MapInboundClaims=false)
- aud=gitea, scope=read:gitea, iss=https://auth.zhengchentao.win

Gitea API client：
- Authorization: token <PAT> (admin PAT，仅 read scope)
- BaseUrl=https://git.zhengchentao.win
- 错误映射：401/403 → UnauthorizedAccessException，404 → KeyNotFoundException，5xx → InvalidOperationException
- RepoBlacklist 黑名单（owner/repo 精确匹配，默认空）

部署：
- Dockerfile multi-stage，COPY --chown，non-root user
- .gitea/workflows/build-image.yml：build + deploy 双 job，buildkit v0.13.2
- 容器内 :8080，宿主端口 9092
- 子域名 git-mcp.zhengchentao.win（区别于 Gitea 本体 git.zhengchentao.win）

测试：6/6 单测过（GiteaRepoFilter 黑名单匹配）

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

Tools/OrgTools.cs

@@ -0,0 +1,56 @@
+using GiteaMcp.Services;
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+
+namespace GiteaMcp.Tools;
+
+/// <summary>Organization Tool：list_orgs / read_org</summary>
+[McpServerToolType]
+public class OrgTools(GiteaApiClient gitea)
+{
+    [McpServerTool]
+    [Description(
+        "List all Gitea organizations visible to the admin token. " +
+        "Returns: org name, full name, description, visibility, and website. " +
+        "Use read_org to get repo/member counts for a specific org. " +
+        "Tip: after listing orgs, call list_repos with owner=<org_name> to see that org's repos.")]
+    public async Task<object> list_orgs(
+        [Description("Max orgs to return. Default 50.")] int? limit = null,
+        CancellationToken ct = default)
+    {
+        var lim = Math.Min(limit ?? 50, 50);
+        var orgs = await gitea.GetOrgsAsync(lim, ct);
+
+        return orgs.Select(o => new
+        {
+            name = o.Name,
+            full_name = o.FullName,
+            description = o.Description,
+            website = o.Website,
+            location = o.Location,
+            visibility = o.Visibility,
+        }).ToList();
+    }
+
+    [McpServerTool]
+    [Description(
+        "Get detailed information about a specific Gitea organization: " +
+        "description, website, location, and visibility setting. " +
+        "Use list_repos with owner=<name> to see the org's repositories.")]
+    public async Task<object> read_org(
+        [Description("Organization name (login).")] string name,
+        CancellationToken ct = default)
+    {
+        var org = await gitea.GetOrgAsync(name, ct);
+
+        return new
+        {
+            name = org.Name,
+            full_name = org.FullName,
+            description = org.Description,
+            website = org.Website,
+            location = org.Location,
+            visibility = org.Visibility,
+        };
+    }
+}