feat(tools): issue_comment with identity footer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/tools/issue_comment.go

@@ -0,0 +1,73 @@
+package tools
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/auth"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/identity"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/registry"
+)
+
+type IssueComment struct {
+	c *gitea.Client
+	a *allowlist.Allowlist
+}
+
+func NewIssueComment(c *gitea.Client, a *allowlist.Allowlist) *IssueComment {
+	return &IssueComment{c: c, a: a}
+}
+
+func (t *IssueComment) Descriptor() registry.ToolDescriptor {
+	return registry.ToolDescriptor{
+		Name:        "issue_comment",
+		Description: "Comment on an issue. Applies identity footer to body.",
+		InputSchema: json.RawMessage(`{
+			"type":"object",
+			"properties":{
+				"owner":{"type":"string"},
+				"name":{"type":"string"},
+				"number":{"type":"integer","minimum":1},
+				"body":{"type":"string"}
+			},
+			"required":["owner","name","number","body"]
+		}`),
+	}
+}
+
+type issueCommentArgs struct {
+	Owner  string `json:"owner"`
+	Name   string `json:"name"`
+	Number int    `json:"number"`
+	Body   string `json:"body"`
+}
+
+func (t *IssueComment) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
+	var args issueCommentArgs
+	if err := parseArgs(raw, &args); err != nil {
+		return nil, err
+	}
+	if err := t.a.Check(args.Owner); err != nil {
+		return nil, err
+	}
+	if args.Number < 1 {
+		return nil, fmt.Errorf("number must be >= 1: %w", gitea.ErrValidation)
+	}
+	if args.Body == "" {
+		return nil, fmt.Errorf("body is required: %w", gitea.ErrValidation)
+	}
+	body := identity.ApplyFooter(args.Body, auth.Caller(ctx))
+
+	c, err := t.c.CreateIssueComment(ctx, args.Owner, args.Name, args.Number, body)
+	if err != nil {
+		return nil, err
+	}
+
+	return textOK(map[string]any{
+		"id":       c.ID,
+		"html_url": c.HTMLURL,
+	})
+}