feat: add prgs-reconciler profile and gated already-landed PR close (Closes #310)

Introduce a dedicated reconciler role with gitea_reconcile_already_landed_pr,
which closes open PRs only after live fetch and ancestor proof against a fresh
target branch. Document the gitea-reconciler namespace and extend task routing.

role_session_router.py

@@ -72,6 +72,14 @@ AUTHOR_TASKS = frozenset({
     "comment_pr",
     "address_pr_change_requests",
     "delete_branch",
+    "work_issue",
+    "work-issue",
+})
+
+RECONCILER_TASKS = frozenset({
+    "reconcile_already_landed_pr",
+    "reconcile_already_landed",
+    "reconcile-landed-pr",
 })
 
 TASK_REQUIRED_ROLE = {
@@ -90,12 +98,21 @@ TASK_REQUIRED_ROLE = {
     "blind_pr_queue_review": "reviewer",
     "request_changes_pr": "reviewer",
     "approve_pr": "reviewer",
+    "work_issue": "author",
+    "work-issue": "author",
+    "reconcile_already_landed_pr": "reconciler",
+    "reconcile_already_landed": "reconciler",
+    "reconcile-landed-pr": "reconciler",
 }
 
 WRONG_ROLE_REVIEWER_MSG = (
     "Wrong role/session for reviewer task. Launch reviewer MCP namespace."
 )
 
+WRONG_ROLE_RECONCILER_MSG = (
+    "Wrong role/session for reconciler task. Launch reconciler MCP namespace."
+)
+
 _session_last_route: dict | None = None
 
 
@@ -191,6 +208,32 @@ def route_task_session(
         _record_route(result)
         return result
 
+    if required_role == "reconciler":
+        message = WRONG_ROLE_RECONCILER_MSG
+        if active_role_kind == "reconciler":
+            message = (
+                "Reconciler task requires gitea.pr.close on a dedicated "
+                "reconciler profile."
+            )
+        result = {
+            "task_type": task_type,
+            "required_role": required_role,
+            "active_role": active_role_kind,
+            "active_profile": active_profile,
+            "route_result": ROUTE_WRONG_ROLE,
+            "downstream_allowed": False,
+            "reasons": [
+                message,
+                "Reconciler tasks cannot run in author or reviewer sessions.",
+                "Static-profile mode does not permit in-place role switching.",
+            ],
+            "message": WRONG_ROLE_RECONCILER_MSG,
+            "runtime_switching_supported": runtime_switching_supported,
+            "profile_switch_blocked": not runtime_switching_supported,
+        }
+        _record_route(result)
+        return result
+
     if required_role == "author":
         route = ROUTE_TO_AUTHOR
         message = (