diff --git a/crates/workspace-server/src/server.rs b/crates/workspace-server/src/server.rs
index 2aa6ecc63..cd4463fb6 100644
--- a/crates/workspace-server/src/server.rs
+++ b/crates/workspace-server/src/server.rs
@@ -2579,6 +2579,23 @@ fn repository_api_rejection(path: &str, status: StatusCode, message: &str) -> Re
     status.into_response()
 }
 
+/// Authored configuration editors are user-facing authority, not a generic
+/// Runtime workspace.request capability. Worker configuration access is only
+/// through the grant- and connection-bound WIP adapter. Keep runtime projections
+/// (Prompt/Skill/config bundles) on their existing, separate consumer contracts.
+fn is_workspace_config_editor_path(path: &str) -> bool {
+    let Some((_, resource)) = path
+        .strip_prefix("/api/w/")
+        .and_then(|scoped| scoped.split_once('/'))
+    else {
+        return false;
+    };
+    resource == "config/source-tree"
+        || resource.starts_with("config/source-tree/")
+        || resource == "settings/profiles"
+        || resource.starts_with("settings/profiles/")
+}
+
 async fn authorize_scoped_workspace_request(
     api: &WorkspaceServerApi,
     workspace_id: &str,
@@ -2639,6 +2656,13 @@ async fn authorize_scoped_workspace_request(
                 "invalid runtime request proof",
             )
         })?;
+        if is_workspace_config_editor_path(&request_path) {
+            return Err(repository_api_rejection(
+                &request_path,
+                StatusCode::FORBIDDEN,
+                "Runtime configuration editor access denied",
+            ));
+        }
         request.extensions_mut().insert(source);
         if !matches!(
             *request.method(),
@@ -2771,6 +2795,13 @@ async fn authorize_workspace_api_request(
                 "invalid runtime request proof",
             );
         };
+        if is_workspace_config_editor_path(&request_path) {
+            return repository_api_rejection(
+                &request_path,
+                StatusCode::FORBIDDEN,
+                "Runtime configuration editor access denied",
+            );
+        }
         request.extensions_mut().insert(source);
         if !matches!(
             *request.method(),
diff --git a/crates/workspace-server/src/server_workspace_config_tests.rs b/crates/workspace-server/src/server_workspace_config_tests.rs
index 628a16456..e65ae4e62 100644
--- a/crates/workspace-server/src/server_workspace_config_tests.rs
+++ b/crates/workspace-server/src/server_workspace_config_tests.rs
@@ -127,6 +127,99 @@ mod workspace_config_integration {
         )
     }
 
+    #[tokio::test]
+    async fn workspace_config_signed_editor_routes_cannot_bypass_wip_authority() {
+        let mut fixture = manual_coder_assignment_fixture().await;
+        let identity = RuntimeIdentityMaterial::generate(&fixture.worker.runtime_id).unwrap();
+        configure_runtime_request_auth(&mut fixture.api, &identity, &fixture.worker.runtime_id);
+        let api = &fixture.api;
+        let initial = api.config_store.load_workspace_config(TEST_WORKSPACE_ID).unwrap().unwrap();
+        let tree = format!("/api/w/{TEST_WORKSPACE_ID}/config/source-tree");
+        let change = server_api::ConfigCommitRequest {
+            base_revision: initial.snapshot.revision,
+            base_digest: initial.snapshot.digest.clone(),
+            changes: vec![create("notes/editor-only.txt", "must not persist from Worker")],
+            entrypoints: vec!["main.dcdl".into()],
+        };
+        let routes = [
+            ("GET", tree.clone()),
+            ("GET", format!("{tree}/entries/main.dcdl")),
+            ("GET", format!("{tree}/revisions/{}", initial.snapshot.revision)),
+            ("POST", format!("{tree}/commit")),
+            ("GET", format!("/api/w/{TEST_WORKSPACE_ID}/settings/profiles")),
+        ];
+        for state in ["ungranted", "read_only", "revoked", "detached", "read_write"] {
+            match state {
+                "read_only" => {
+                    grant(api, &fixture.worker, Access::ReadOnly).await;
+                    attach(api, &fixture.worker).await;
+                }
+                "revoked" => {
+                    let current = api.store.current_workspace_config_grant(TEST_WORKSPACE_ID, &fixture.worker).unwrap().unwrap();
+                    workspace_config::revoke_grant(api, &test_owner_actor(), TEST_WORKSPACE_ID,
+                        &current.grant_id).await.unwrap();
+                }
+                "detached" => {
+                    grant(api, &fixture.worker, Access::ReadWrite).await;
+                    let attached = attach(api, &fixture.worker).await;
+                    detach_current_worker_workdir(api, &fixture.worker, "workspace-config",
+                        Some(&attached.connection_id)).await.unwrap();
+                }
+                "read_write" => { attach(api, &fixture.worker).await; }
+                _ => {}
+            }
+            for (method, path) in &routes {
+                let body = if *method == "POST" { serde_json::to_vec(&change).unwrap() } else { vec![] };
+                for scoped in [false, true] {
+                    let app = if scoped {
+                        workspace_server_router(WorkspaceServerApi::new(api.config.clone(), api.store.clone()))
+                    } else {
+                        build_router(api.clone())
+                    };
+                    let response = app.oneshot(runtime_source_request(&identity,
+                        Some(&fixture.worker.worker_id), method, path, body.clone())).await.unwrap();
+                    assert_eq!(response.status(), StatusCode::FORBIDDEN,
+                        "{state}: {method} {path}, scoped={scoped}");
+                    let bytes = to_bytes(response.into_body(), 4096).await.unwrap();
+                    assert!(!String::from_utf8_lossy(&bytes).contains("must not persist"));
+                }
+            }
+            let after = api.config_store.load_workspace_config(TEST_WORKSPACE_ID).unwrap().unwrap();
+            assert_eq!(after.snapshot, initial.snapshot, "{state}: editor rejection must have no effect");
+        }
+        // A Runtime-only proof is not a user editor identity either.
+        assert_eq!(signed_call(api, &identity, None, "GET", &tree, Value::Null).await.0,
+            StatusCode::FORBIDDEN);
+        let attached = attach(api, &fixture.worker).await;
+        let observed = observe(api, &fixture.worker, &attached.connection_id, &["main.dcdl"], 0).await;
+        let node = observed.nodes.iter().find(|n| n.path == "main.dcdl").unwrap();
+        assert!(workspace_config::read(api, &fixture.worker, Read {
+            connection_id: attached.connection_id,
+            path: "main.dcdl".into(), validator: node.validator.clone(),
+        }).await.is_ok(), "the granted WIP path remains available");
+
+        // Real API-token authentication still permits the normal UI editor.
+        let token = seed_test_api_token(api.store.as_ref(), TEST_WORKSPACE_ID);
+        for (method, path) in &routes {
+            if *method == "GET" {
+                request_json_authenticated(build_router(api.clone()), method, path, None,
+                    &token, StatusCode::OK).await;
+            }
+        }
+        request_json_authenticated(build_router(api.clone()), "POST", &format!("{tree}/commit"),
+            Some(serde_json::to_value(change).unwrap()), &token, StatusCode::CREATED).await;
+        let saved = api.config_store.load_workspace_config(TEST_WORKSPACE_ID).unwrap().unwrap();
+        assert_eq!(saved.snapshot.revision, initial.snapshot.revision + 1);
+        assert!(saved.snapshot.entries.keys().any(|p| p.as_str() == "notes/editor-only.txt"));
+        // Prompt and Skill runtime consumption are separate read-only projections,
+        // not authored-tree editor APIs; bootstrap must remain usable.
+        assert_eq!(signed_call(api, &identity, Some(&fixture.worker.worker_id), "GET",
+            &format!("/api/w/{TEST_WORKSPACE_ID}/config/projections/prompts"), Value::Null).await.0,
+            StatusCode::OK);
+        assert_eq!(signed_call(api, &identity, Some(&fixture.worker.worker_id), "GET",
+            &format!("/api/w/{TEST_WORKSPACE_ID}/skills"), Value::Null).await.0, StatusCode::OK);
+    }
+
     #[tokio::test]
     async fn workspace_config_entrypoint_support_is_exact_and_canonical_mutations_stay_guarded() {
         let fixture = manual_coder_assignment_fixture().await;
diff --git a/docs/design/workspace-config-wip-projection.md b/docs/design/workspace-config-wip-projection.md
index 768655b3a..a8dfc977c 100644
--- a/docs/design/workspace-config-wip-projection.md
+++ b/docs/design/workspace-config-wip-projection.md
@@ -89,6 +89,22 @@ ID. Worker requests carry authenticated source identity, never these IDs as a
 substitute for authorization. A grant from another Workspace or another Worker
 cannot be adopted by knowing a route or possessing a previous Interface.
 
+Explicit grants do not replace the UI editor's user authentication. Authored
+source-tree read/entry/history/commit routes and the UI Profile settings catalog
+reject Runtime/Worker source proofs in both single-Workspace and server-scoped
+middleware, including workers with a read-write grant. `workspace.request` is
+not a configuration-editor capability: granted Workers use the WIP adapter,
+never the UI editor as an alternate access path. User/session/API-token editing
+continues to share the canonical validation and CAS boundary with WIP saves.
+
+The audit found no separate Profile/Prompt/Runtime/Skill source-save endpoint;
+authored writes converge on source-tree commit. Existing runtime consumption of
+Prompt projections, Skill catalog/activation and resolved config bundles remains
+a separate read-only/activation contract needed for Worker startup and normal
+operation. Those evaluated projections are not authored source-tree bodies,
+revision history or a second editor. Do not fence all `/config` routes as one
+capability: that would break the existing Prompt reader's runtime contract.
+
 The existing connection ledger remains authoritative. Each granted Worker has
 an independently identified logical registry target over the **same** authored
 configuration tree. This preserves the ordinary Workdir exclusive-owner