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/IssueTools.cs

@@ -0,0 +1,89 @@
+using GiteaMcp.Services;
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+
+namespace GiteaMcp.Tools;
+
+/// <summary>Issue Tool：list_issues / read_issue</summary>
+[McpServerToolType]
+public class IssueTools(
+    GiteaApiClient gitea,
+    GiteaRepoFilter filter)
+{
+    [McpServerTool]
+    [Description(
+        "List issues in a Gitea repository. " +
+        "state can be 'open' (default), 'closed', or 'all'. " +
+        "Returns: issue number, title, state, labels, assignees, created_at, comment count, and URL. " +
+        "Use read_issue to get the full body and comments of a specific issue.")]
+    public async Task<object> list_issues(
+        [Description("Repository owner.")] string owner,
+        [Description("Repository name.")] string repo,
+        [Description("Filter by state: 'open', 'closed', or 'all'. Default 'open'.")] string? state = null,
+        [Description("Max issues to return. Default 30.")] int? limit = null,
+        CancellationToken ct = default)
+    {
+        if (filter.IsBlocked($"{owner}/{repo}"))
+            throw new UnauthorizedAccessException($"Repo {owner}/{repo} is on the access blocklist.");
+
+        var st = state ?? "open";
+        var lim = Math.Min(limit ?? 30, 50);
+        var issues = await gitea.GetIssuesAsync(owner, repo, st, lim, ct);
+
+        return issues.Select(i => new
+        {
+            number = i.Number,
+            title = i.Title,
+            state = i.State,
+            html_url = i.HtmlUrl,
+            author = i.User?.Login,
+            labels = i.Labels?.Select(l => l.Name).ToList() ?? [],
+            assignees = i.Assignees?.Select(a => a.Login).ToList() ?? [],
+            comments = i.Comments,
+            created_at = i.CreatedAt,
+            updated_at = i.UpdatedAt,
+            closed_at = i.ClosedAt,
+        }).ToList();
+    }
+
+    [McpServerTool]
+    [Description(
+        "Get the full body and all comments of a specific Gitea issue. " +
+        "Use list_issues first to find the issue number. " +
+        "Returns: title, body (Markdown), state, labels, and all comment texts with authors and timestamps.")]
+    public async Task<object> read_issue(
+        [Description("Repository owner.")] string owner,
+        [Description("Repository name.")] string repo,
+        [Description("Issue number (integer, e.g. 42).")] int number,
+        CancellationToken ct = default)
+    {
+        if (filter.IsBlocked($"{owner}/{repo}"))
+            throw new UnauthorizedAccessException($"Repo {owner}/{repo} is on the access blocklist.");
+
+        var issue = await gitea.GetIssueAsync(owner, repo, number, ct);
+        var comments = await gitea.GetIssueCommentsAsync(owner, repo, number, ct);
+
+        return new
+        {
+            number = issue.Number,
+            title = issue.Title,
+            body = issue.Body,
+            state = issue.State,
+            html_url = issue.HtmlUrl,
+            author = issue.User?.Login,
+            labels = issue.Labels?.Select(l => l.Name).ToList() ?? [],
+            assignees = issue.Assignees?.Select(a => a.Login).ToList() ?? [],
+            created_at = issue.CreatedAt,
+            updated_at = issue.UpdatedAt,
+            closed_at = issue.ClosedAt,
+            comments = comments.Select(c => new
+            {
+                id = c.Id,
+                author = c.User?.Login,
+                body = c.Body,
+                created_at = c.CreatedAt,
+                updated_at = c.UpdatedAt,
+            }).ToList(),
+        };
+    }
+}