docs: record static python source support

docs/current_roadmap.md

@@ -88,6 +88,9 @@ auth admin are implemented. The next work is polish, not new broad surfaces.
 - Active implementation plan: static config Python sources for trusted
   project-local `NodeSpec` registries:
   [`static Python sources`](superpowers/plans/2026-06-11-static-python-sources.md).
+- Completed: static config `kind: "python"` sources can load trusted local
+  `NodeSpec` registries and expose them through WorkflowServer. Implementation:
+  [`static Python sources`](historical/superpowers/plans/2026-06-11-static-python-sources.md).
 - Completed: server startup policy moved to `wf_server.cli`; JSON-RPC HTTP
   remains in `wf_transport_rpc_http`:
   [`server CLI and transport boundary`](superpowers/specs/2026-06-10-server-cli-transport-boundary.md).

docs/superpowers/specs/2026-06-11-python-source-provider.md

@@ -2,7 +2,7 @@
 
 Date: 2026-06-11
 
-Status: planned first non-MCP source family
+Status: first static config slice implemented
 
 Related:
 
@@ -113,3 +113,20 @@ After static config works:
 4. Consider isolation policy for untrusted Python. The first version is trusted
    in-process code only.
 
+## Implementation Status
+
+Implemented:
+
+- `wf_config` accepts `server.sources[]` entries with `kind: "python"`.
+- `wf_sources_python` loads trusted in-process `NodeSpec` registries from
+  `module:registry`.
+- `wf_server.config` composes Python sources into local/static servers.
+- Capability listing/calling works over JSON-RPC.
+
+Still deferred:
+
+- mutable source registry/apply support
+- hot reload
+- reducer exports
+- sandboxing/untrusted code
+

src/wf_sources_python/loader.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from collections.abc import Callable, Mapping, Sequence
+from collections.abc import Mapping, Sequence
 from importlib import import_module
 from typing import Any, Protocol
 
@@ -76,7 +76,9 @@ def _coerce_specs(raw_registry: object) -> list[NodeSpec[Any, Any]]:
     specs: list[NodeSpec[Any, Any]] = []
     for value in values:
         if not isinstance(value, NodeSpec):
-            raise TypeError(f"expected NodeSpec in Python source registry, got {type(value).__name__}")
+            raise TypeError(
+                f"expected NodeSpec in Python source registry, got {type(value).__name__}"
+            )
         specs.append(value)
     return specs