Enhance issue management tools: add relations and watchers functionality, update README

app/client.py

@@ -32,3 +32,10 @@ def _post(path: str, body: dict) -> dict:
         resp = client.post(url, headers=_headers(), content=json.dumps(body))
         resp.raise_for_status()
         return resp.json()
+
+
+def _delete(path: str) -> None:
+    url = f"{REDMINE_URL}{path}"
+    with httpx.Client(timeout=15) as client:
+        resp = client.delete(url, headers=_headers())
+        resp.raise_for_status()

app/entities/__init__.py

@@ -1,3 +1,3 @@
-from . import issues, comments, members, statuses, search
+from . import issues, comments, members, statuses, search, relations
 
-__all__ = ["issues", "comments", "members", "statuses", "search"]
+__all__ = ["issues", "comments", "members", "statuses", "search", "relations"]

app/entities/issues.py

@@ -1,6 +1,17 @@
 import json
 from ..mcp import mcp
-from ..client import _get, _put, _post
+from ..client import _get, _put, _post, _delete
+
+
+def _apply_relations(issue_id: int, relations: list[dict]) -> None:
+    """Create issue relations. Each item: {"issue_id": int, "relation_type": str}."""
+    for rel in relations:
+        _post(f"/issues/{issue_id}/relations.json", {
+            "relation": {
+                "issue_to_id": rel["issue_id"],
+                "relation_type": rel.get("relation_type", "relates"),
+            }
+        })
 
 
 @mcp.tool()
@@ -11,17 +22,26 @@ def create_issue(
     assigned_to_id: int = 0,
     priority_id: int = 0,
     due_date: str = "",
+    parent_issue_id: int = 0,
+    watcher_user_ids: list[int] | None = None,
+    relations: list[dict] | None = None,
 ) -> str:
     """
     Create a new Redmine issue.
 
     Args:
-        project_id:      Project ID or slug
-        subject:         Issue title
-        description:     Issue description
-        assigned_to_id:  User ID to assign (use get_project_members to find IDs)
-        priority_id:     Priority ID (leave 0 for default)
-        due_date:        Due date in YYYY-MM-DD format
+        project_id:       Project ID or slug
+        subject:          Issue title
+        description:      Issue description
+        assigned_to_id:   User ID to assign (use get_project_members to find IDs)
+        priority_id:      Priority ID (leave 0 for default)
+        due_date:         Due date in YYYY-MM-DD format
+        parent_issue_id:  Parent issue ID (makes this a subtask)
+        watcher_user_ids: List of user IDs to add as watchers
+        relations:        List of related issues, e.g.
+                          [{"issue_id": 42, "relation_type": "relates"}]
+                          Types: relates, duplicates, duplicated,
+                                 blocks, blocked, precedes, follows
     """
     payload: dict = {"project_id": project_id, "subject": subject}
     if description:
@@ -32,9 +52,17 @@ def create_issue(
         payload["priority_id"] = priority_id
     if due_date:
         payload["due_date"] = due_date
+    if parent_issue_id:
+        payload["parent_issue_id"] = parent_issue_id
+    if watcher_user_ids:
+        payload["watcher_user_ids"] = watcher_user_ids
 
     data = _post("/issues.json", {"issue": payload})
     issue = data["issue"]
+
+    if relations:
+        _apply_relations(issue["id"], relations)
+
     return json.dumps({"id": issue["id"], "subject": issue["subject"]}, ensure_ascii=False, indent=2)
 
 
@@ -102,17 +130,26 @@ def update_issue(
     priority_id: int = 0,
     due_date: str = "",
     comment: str = "",
+    parent_issue_id: int = 0,
+    watcher_user_ids: list[int] | None = None,
+    relations: list[dict] | None = None,
 ) -> str:
     """
     Update general fields of a Redmine issue.
 
     Args:
-        issue_id:    Redmine issue ID
-        subject:     New title (leave empty to keep current)
-        description: New description (leave empty to keep current)
-        priority_id: Priority ID (leave 0 to keep current)
-        due_date:    Due date in YYYY-MM-DD format (leave empty to keep current)
-        comment:     Optional journal note
+        issue_id:         Redmine issue ID
+        subject:          New title (leave empty to keep current)
+        description:      New description (leave empty to keep current)
+        priority_id:      Priority ID (leave 0 to keep current)
+        due_date:         Due date in YYYY-MM-DD format (leave empty to keep current)
+        comment:          Optional journal note
+        parent_issue_id:  Parent issue ID (makes this a subtask; 0 = no change)
+        watcher_user_ids: List of user IDs to add as watchers
+        relations:        List of relations to add, e.g.
+                          [{"issue_id": 42, "relation_type": "blocks"}]
+                          Types: relates, duplicates, duplicated,
+                                 blocks, blocked, precedes, follows
     """
     payload: dict = {}
     if subject:
@@ -125,12 +162,27 @@ def update_issue(
         payload["due_date"] = due_date
     if comment:
         payload["notes"] = comment
+    if parent_issue_id:
+        payload["parent_issue_id"] = parent_issue_id
 
-    if not payload:
+    if not payload and not watcher_user_ids and not relations:
         return "Nothing to update — all fields are empty."
 
-    _put(f"/issues/{issue_id}.json", {"issue": payload})
-    return f"Issue #{issue_id} updated: {list(payload.keys())}."
+    if payload:
+        _put(f"/issues/{issue_id}.json", {"issue": payload})
+
+    for user_id in (watcher_user_ids or []):
+        _post(f"/issues/{issue_id}/watchers.json", {"user_id": user_id})
+
+    if relations:
+        _apply_relations(issue_id, relations)
+
+    updated = list(payload.keys())
+    if watcher_user_ids:
+        updated.append("watchers")
+    if relations:
+        updated.append("relations")
+    return f"Issue #{issue_id} updated: {updated}."
 
 
 @mcp.tool()

app/entities/relations.py

@@ -0,0 +1,84 @@
+import json
+from ..mcp import mcp
+from ..client import _get, _post, _delete
+
+
+@mcp.tool()
+def get_issue_relations(issue_id: int) -> str:
+    """
+    Get all relations for a Redmine issue.
+    Returns relation IDs needed for remove_issue_relation.
+    """
+    data = _get(f"/issues/{issue_id}/relations.json")
+    return json.dumps(data.get("relations", []), ensure_ascii=False, indent=2)
+
+
+@mcp.tool()
+def add_issue_relation(
+    issue_id: int,
+    related_issue_id: int,
+    relation_type: str = "relates",
+    delay: int = 0,
+) -> str:
+    """
+    Add a relation between two Redmine issues.
+
+    Args:
+        issue_id:         Source issue ID
+        related_issue_id: Target issue ID
+        relation_type:    Type of relation:
+                          - relates       — generic relation
+                          - duplicates    — this issue duplicates the target
+                          - duplicated    — this issue is duplicated by the target
+                          - blocks        — this issue blocks the target
+                          - blocked       — this issue is blocked by the target
+                          - precedes      — this issue must precede the target
+                          - follows       — this issue must follow the target
+                          - copied_to     — this issue was copied to the target
+                          - copied_from   — this issue was copied from the target
+        delay:            Delay in days (used with precedes/follows)
+    """
+    body: dict = {"issue_to_id": related_issue_id, "relation_type": relation_type}
+    if delay:
+        body["delay"] = delay
+    data = _post(f"/issues/{issue_id}/relations.json", {"relation": body})
+    return json.dumps(data.get("relation", {}), ensure_ascii=False, indent=2)
+
+
+@mcp.tool()
+def remove_issue_relation(relation_id: int) -> str:
+    """
+    Remove a relation between issues by relation ID.
+    Use get_issue_relations to find the relation ID.
+
+    Args:
+        relation_id: Relation ID (from get_issue_relations)
+    """
+    _delete(f"/relations/{relation_id}.json")
+    return f"Relation #{relation_id} removed."
+
+
+@mcp.tool()
+def add_watcher(issue_id: int, user_id: int) -> str:
+    """
+    Add a watcher to a Redmine issue.
+
+    Args:
+        issue_id: Redmine issue ID
+        user_id:  User ID to add as watcher (use get_project_members to find IDs)
+    """
+    _post(f"/issues/{issue_id}/watchers.json", {"user_id": user_id})
+    return f"User #{user_id} added as watcher to issue #{issue_id}."
+
+
+@mcp.tool()
+def remove_watcher(issue_id: int, user_id: int) -> str:
+    """
+    Remove a watcher from a Redmine issue.
+
+    Args:
+        issue_id: Redmine issue ID
+        user_id:  User ID to remove from watchers
+    """
+    _delete(f"/issues/{issue_id}/watchers/{user_id}.json")
+    return f"User #{user_id} removed from watchers of issue #{issue_id}."