feat(0.26.0): écritures MCP minimales — create_issue + add_comment gardés par jeton kbt_

tests/test_palier3.py

@@ -121,6 +121,7 @@ def test_mcp_initialize_and_tools_list(client):
     assert names == [
         "list_projects", "get_board", "get_issue", "get_focus",
         "search_issues", "get_activity", "get_metrics",
+        "create_issue", "add_comment",
     ]
 
 
@@ -153,7 +154,7 @@ def test_mcp_unknown_method_and_tool(client):
     assert r.json()["error"]["code"] == -32601
     r = _rpc(client, "tools/call", {"name": "delete_everything", "arguments": {}})
     result = r.json()["result"]
-    assert result["isError"] is True  # read-only server: no such tool
+    assert result["isError"] is True  # aucun outil de ce nom (pas de suppression)
 
 
 def test_mcp_notification_gets_202(client):
@@ -164,7 +165,10 @@ def test_mcp_notification_gets_202(client):
 def test_mcp_info_endpoint(client):
     r = client.get("/mcp")
     assert r.status_code == 200
-    assert r.json()["read_only"] is True
+    # 0.26.0 : écritures minimales ajoutées — le serveur n'est
+    # plus en lecture seule, et il le déclare honnêtement.
+    assert r.json()["read_only"] is False
+    assert r.json()["write_tools"] == ["create_issue", "add_comment"]
 
 
 # ── Board : gestion des étiquettes ────────────────────────