feat: add Runtime read-only TUI

README.md

@@ -9,9 +9,8 @@ It gives you two ways to work, from the same binary:
 - **A scriptable CLI** — every operation is a flag-driven subcommand that emits
   JSON (`--json`), so it can be used by codeing agents and can drop cleanly into
   scripts, CI, and automation.
-- **An interactive TUI** — run a command with no arguments and it opens a
-  full-screen terminal app for browsing resources, filling in wizards, and
-  chatting with a live agent.
+- **An interactive TUI** — bare Harness and Runtime branches and leaves open
+  their corresponding menus and selection flows.
 
 ```bash
 agentcore                      # launch the interactive TUI
@@ -27,8 +26,8 @@ responses. `agentcore` wraps all of that behind one ergonomic tool.
 
 ## Command surface
 
-Every leaf command runs headless with flags, or opens the matching TUI screen
-when invoked bare.
+Commands with operation flags run headlessly. Bare Harness and Runtime branches
+and leaves open their interactive flows.
 
 ```
 agentcore                          # interactive TUI
@@ -117,6 +116,18 @@ agentcore identity api-key-credential-provider update --name my-provider --api-k
 agentcore identity api-key-credential-provider delete --name my-provider
 ```
 
+Bare Runtime branches and leaves require a TTY on stdin and stdout. Supplying
+operation flags runs the command headlessly, and `--json` always suppresses TUI
+rendering.
+
+```bash
+agentcore runtime
+agentcore runtime list
+agentcore runtime get
+agentcore runtime version list
+agentcore runtime endpoint list
+```
+
 ---
 
 # Architecture & patterns

src/components/HarnessEndpointPicker.tsx

@@ -0,0 +1,89 @@
+import { useNavigate } from "react-router";
+import type { HarnessEndpoint } from "@aws-sdk/client-bedrock-agentcore-control";
+import type { ScreenProps } from "../handlers/types";
+import { coreOptsFromCtx } from "../handlers/utils";
+import { PaginatedTablePicker } from "./PaginatedTablePicker";
+
+// EndpointRow is the flat, display-ready shape the table renders.
+interface EndpointRow extends Record<string, unknown> {
+  endpointName: string;
+  liveVersion: string;
+  targetVersion: string;
+  status: string;
+  updatedAt: string;
+}
+
+function toRow(e: HarnessEndpoint): EndpointRow {
+  return {
+    endpointName: e.endpointName!,
+    liveVersion: e.liveVersion ?? "-",
+    targetVersion: e.targetVersion ?? "-",
+    status: e.status!,
+    updatedAt: e.updatedAt!.toISOString(),
+  };
+}
+
+export interface HarnessEndpointPickerProps extends ScreenProps {
+  // harnessId scopes the listing to one harness's endpoints.
+  harnessId: string;
+  // breadcrumb labels the screen the picker is serving.
+  breadcrumb: string[];
+  // description tells the user what selecting an endpoint will do.
+  description?: string;
+  // onSelect receives the chosen endpoint's name.
+  onSelect: (endpointName: string) => void;
+  // onEscape overrides what esc does (default: pop back in history). Hosts
+  // that embed the picker as an overlay (e.g. the chat's ctrl+t endpoint
+  // switch) pass a closer instead.
+  onEscape?: () => void;
+}
+
+/**
+ * Fetches a harness's endpoints and renders them as a navigable table.
+ *
+ * This is the endpoint counterpart of HarnessPicker, shared by every "pick an
+ * endpoint" screen (list, update, delete). Esc pops back.
+ */
+export function HarnessEndpointPicker({
+  ctx,
+  core,
+  harnessId,
+  breadcrumb,
+  description,
+  onSelect,
+  onEscape,
+}: HarnessEndpointPickerProps) {
+  const opts = coreOptsFromCtx(ctx);
+  const navigate = useNavigate();
+  const goBack = onEscape ?? (() => navigate(-1));
+
+  return (
+    <PaginatedTablePicker
+      breadcrumb={breadcrumb}
+      description={description}
+      queryKey={["harness-endpoints", opts.region, harnessId]}
+      loadPage={async (token, pageSize) => {
+        const response = await core.harness.listHarnessEndpoints(harnessId, token, pageSize, opts);
+        return {
+          items: response.endpoints ?? [],
+          nextToken: response.nextToken,
+        };
+      }}
+      toRow={toRow}
+      columns={[
+        { key: "endpointName", header: "name" },
+        { key: "liveVersion", header: "live" },
+        { key: "targetVersion", header: "target" },
+        { key: "status", header: "status" },
+        { key: "updatedAt", header: "updatedAt" },
+      ]}
+      getValue={(row) => row.endpointName}
+      onSelect={onSelect}
+      onBack={goBack}
+      loadingMessage="Loading endpoints…"
+      errorMessage={(error) => `Error: ${error.message}`}
+      emptyMessage="This harness has no endpoints yet."
+      emptyPageMessage={`No endpoints on this page for harness ${harnessId}.`}
+    />
+  );
+}

src/components/HarnessPicker.tsx

@@ -1,14 +1,8 @@
-import { Text, useWindowSize } from "ink";
-import { useQuery, keepPreviousData } from "@tanstack/react-query";
 import { useNavigate } from "react-router";
 import type { HarnessSummary } from "@aws-sdk/client-bedrock-agentcore-control";
-import { DataTable } from "./ui/data-table";
 import type { ScreenProps } from "../handlers/types";
 import { coreOptsFromCtx } from "../handlers/utils";
-import { usePagedList } from "./usePagedList";
-import { Spinner } from "./ui/spinner";
-import { Layout } from "./Layout";
-import { darkTheme } from "./ui/_core.js";
+import { PaginatedTablePicker } from "./PaginatedTablePicker";
 
 // HarnessRow is the flat, display-ready shape the table renders. It also satisfies
 // DataTable's `T extends Record<string, unknown>` constraint, which the SDK's
@@ -43,11 +37,13 @@ export interface HarnessPickerProps extends ScreenProps {
   onSelect: (harnessId: string) => void;
 }
 
-// HarnessPicker fetches the caller's harnesses and renders them as a navigable
-// table. It is the shared body of every "pick a harness" screen (list, invoke);
-// hosts differ only in breadcrumb, subtitle, and what selection does. Esc
-// returns to the parent menu, derived from the breadcrumb (e.g. the endpoint
-// menu for [..., "endpoint", "list"]).
+/**
+ * Fetches the caller's harnesses and renders them as a navigable table.
+ *
+ * This is the shared body of every "pick a harness" screen (list, invoke);
+ * hosts differ only in breadcrumb, subtitle, and what selection does. Esc
+ * returns to the parent menu derived from the breadcrumb.
+ */
 export function HarnessPicker({
   ctx,
   core,
@@ -56,69 +52,35 @@ export function HarnessPicker({
   onSelect,
 }: HarnessPickerProps) {
   const opts = coreOptsFromCtx(ctx);
-  const { columns } = useWindowSize();
   const navigate = useNavigate();
-  const paging = usePagedList();
-
-  const list = useQuery({
-    queryKey: ["harnesses", opts.region, paging.pageSize, paging.token],
-    queryFn: () => core.harness.listHarnesses(paging.token, paging.pageSize, opts),
-    placeholderData: keepPreviousData,
-  });
-
-  const nextToken = list.data?.nextToken;
-  // Pagination surfaces only once a response reports more pages (nextToken).
-  const paginated = paging.pageIndex > 0 || nextToken !== undefined;
+  const goBack = () => navigate("/" + breadcrumb.slice(0, -1).join("/"));
 
   return (
-    <Layout
+    <PaginatedTablePicker
       breadcrumb={breadcrumb}
       description={description}
-      keyHints={[
-        { key: "↑↓/kj", label: "navigate" },
-        ...(paginated ? [{ key: "←→/hl", label: "page" }] : []),
-        { key: "/", label: "filter" },
-        { key: "enter", label: "select" },
-        { key: "esc", label: "back" },
-        { key: "ctl+c", label: "quit" },
+      queryKey={["harnesses", opts.region]}
+      loadPage={async (token, pageSize) => {
+        const response = await core.harness.listHarnesses(token, pageSize, opts);
+        return {
+          items: response.harnesses ?? [],
+          nextToken: response.nextToken,
+        };
+      }}
+      toRow={toRow}
+      columns={[
+        { key: "harnessName", header: "name" },
+        { key: "harnessVersion", header: "version" },
+        { key: "status", header: "status" },
+        { key: "updatedAt", header: "updatedAt" },
       ]}
-    >
-      {list.isPending ? (
-        <Spinner label="Loading harnesses…" />
-      ) : list.isError ? (
-        <Text color="red">Error: {(list.error as Error).message}</Text>
-      ) : (
-        <>
-          <DataTable
-            borderStyle="none"
-            borderTop={false}
-            borderBottom={false}
-            borderRight={false}
-            showFooter={false}
-            showDivider={true}
-            pageSize={paging.pageSize}
-            columns={[
-              { key: "harnessName", header: "name", width: columns - 62 },
-              { key: "updatedAt", header: "updatedAt", width: 30 },
-              { key: "harnessVersion", header: "version", width: 10 },
-              { key: "status", header: "status", width: 20 },
-            ]}
-            data={(list.data.harnesses ?? []).map(toRow)}
-            onSelect={(row) => {
-              if (row.harnessId) onSelect(row.harnessId);
-            }}
-            onEscape={() => navigate("/" + breadcrumb.slice(0, -1).join("/"))}
-            onPrevPage={paging.pageIndex > 0 ? paging.prev : undefined}
-            onNextPage={nextToken ? () => paging.next(nextToken) : undefined}
-          />
-          {paginated && (
-            <Text color={darkTheme.colors.muted} dimColor>
-              page {paging.pageIndex + 1}
-              {nextToken ? " · more →" : ""}
-            </Text>
-          )}
-        </>
-      )}
-    </Layout>
+      getValue={(row) => row.harnessId}
+      onSelect={onSelect}
+      onBack={goBack}
+      loadingMessage="Loading harnesses…"
+      errorMessage={(error) => `Error: ${error.message}`}
+      emptyMessage="No harnesses found."
+      emptyPageMessage="No harnesses on this page."
+    />
   );
 }