diff --git a/.github/workflows/erlang.yml b/.github/workflows/erlang.yml
index aa193ea..d169989 100644
--- a/.github/workflows/erlang.yml
+++ b/.github/workflows/erlang.yml
@@ -69,12 +69,12 @@ jobs:
           #!/bin/sh
           printf 29
           SH
-          cat > /tmp/release/observer_cli-2.0.0-otp29 <<'SH'
+          cat > /tmp/release/observer_cli-2.1.0-otp29 <<'SH'
           #!/bin/sh
-          printf '%s\n' 'observer_cli 2.0.0' 'controller OTP 29'
+          printf '%s\n' 'observer_cli 2.1.0' 'controller OTP 29'
           SH
-          chmod +x /tmp/bin/curl /tmp/bin/erl /tmp/release/observer_cli-2.0.0-otp29
-          (cd /tmp/release && sha256sum observer_cli-2.0.0-otp29 > SHA256SUMS)
+          chmod +x /tmp/bin/curl /tmp/bin/erl /tmp/release/observer_cli-2.1.0-otp29
+          (cd /tmp/release && sha256sum observer_cli-2.1.0-otp29 > SHA256SUMS)
           HOME=/tmp/home PATH=/tmp/bin:/usr/bin:/bin sh /src/install.sh
           test -x /tmp/home/.local/bin/observer_cli
           SMOKE
diff --git a/README.md b/README.md
index dd247b4..b932727 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Build Status](https://github.com/zhongwencool/observer_cli/workflows/ci/badge.svg)](https://github.com/zhongwencool/observer_cli/actions)
 [![codecov](https://codecov.io/gh/zhongwencool/observer_cli/branch/main/graph/badge.svg)](https://codecov.io/gh/zhongwencool/observer_cli)
-[![GitHub tag](https://img.shields.io/github/tag/zhongwencool/observer_cli.svg)](https://github.com/zhongwencool/observer_cli)
+[![GitHub tag](https://img.shields.io/github/tag/smartrent/observer_cli.svg)](https://github.com/smartrent/observer_cli)
 [![MIT License](https://img.shields.io/hexpm/l/observer_cli.svg)](https://hex.pm/packages/observer_cli)
 [![Hex.pm Version](https://img.shields.io/hexpm/v/observer_cli.svg)](https://hex.pm/packages/observer_cli)
 [![Hex.pm Downloads](https://img.shields.io/hexpm/dt/observer_cli.svg)](https://hex.pm/packages/observer_cli)
@@ -24,7 +24,7 @@ process rankings](https://raw.githubusercontent.com/zhongwencool/observer_cli/8e
 ## Installation
 
 Install `observer_cli` in the target release so command diagnostics can run
-there. Version 2.0 controllers require the matching `2.0.0` target bundle.
+there. Version 2.1 controllers require the matching `2.1.0` target bundle.
 Observer CLI 2.0 supports Erlang/OTP 26–29. JSON output requires OTP 27 or
 newer on the controller; text and Erlang-term output work across the supported
 range.
@@ -36,7 +36,7 @@ Add the dependency to `rebar.config`:
 
 ```erlang
 {deps, [
-    {observer_cli, "2.0.0"}
+    {observer_cli, {git, "https://github.com/smartrent/observer_cli.git", {tag, "v2.1.0"}}}
 ]}.
 ```
 
@@ -53,7 +53,7 @@ Add the dependency to `mix.exs`:
 ```elixir
 defp deps do
   [
-    {:observer_cli, "2.0.0"}
+    {:observer_cli, git: "https://github.com/smartrent/observer_cli", tag: "v2.1.0"},
   ]
 end
 ```
@@ -79,7 +79,7 @@ On macOS or Linux, the versioned installer selects the escript for the local
 OTP major, verifies its release checksum, and installs it for the current user:
 
 ```sh
-curl -fsSL https://raw.githubusercontent.com/zhongwencool/observer_cli/v2.0.0/install.sh | sh
+curl -fsSL https://raw.githubusercontent.com/smartrent/observer_cli/v2.1.0/install.sh | sh
 ```
 
 Add `$HOME/.local/bin` to `PATH` if the installer asks you to.
@@ -89,9 +89,9 @@ Add `$HOME/.local/bin` to `PATH` if the installer asks you to.
 Build the same version from its release tag instead:
 
 ```sh
-VERSION=2.0.0
+VERSION=2.1.0
 git clone --branch "v${VERSION}" --depth 1 \
-  https://github.com/zhongwencool/observer_cli.git
+  https://github.com/smartrent/observer_cli.git
 cd observer_cli
 ```
 
@@ -153,7 +153,7 @@ the response, and stops the controller before returning.
 - Explore the same node interactively through detailed TUI pages and plugins.
 
 The normative machine-readable response contract is published as
-[`priv/schema/observer_cli.cli.v1.schema.json`](https://raw.githubusercontent.com/zhongwencool/observer_cli/v2.0.0/priv/schema/observer_cli.cli.v1.schema.json).
+[`priv/schema/observer_cli.cli.v1.schema.json`](https://raw.githubusercontent.com/smartrent/observer_cli/v2.1.0/priv/schema/observer_cli.cli.v1.schema.json).
 
 ## Choose CLI or TUI
 
@@ -162,7 +162,7 @@ The normative machine-readable response contract is published as
 | **CLI — recommended** | Production runbooks, automation, incident capture, and AI-agent workflows | `observer_cli diagnose` |
 | TUI | Live exploration, ranking changes, and detail drill-down | `observer_cli tui app@host` |
 
-The CLI requires `observer_cli` 2.0.0 in the target release and does not inject
+The CLI requires `observer_cli` 2.1.0 in the target release and does not inject
 missing diagnostic code. The TUI can load its matching interactive bundle on a
 trusted target before starting. The old bare
 `observer_cli NODE [COOKIE REFRESH_MS]` form is not supported; use the explicit
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 6563c2a..1ac2e78 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -2,6 +2,20 @@
 
 Release and maintenance changes, newest first.
 
+## 2.1.0
+
+- Added a `/proc` fallback for the Home and System `ps` fields on hosts whose
+  `ps` lacks `-o`, such as BusyBox on Nerves. `ps -o` support is probed once
+  per session, and the TUI no longer runs `ps` on every render when it is
+  missing.
+- Shown `cpu rate` in place of `ps -o pcpu` on the fallback. It is a rate over
+  the refresh interval, not a lifetime average, and may exceed 100 on
+  multicore hosts.
+- Relabelled the memory fields to `/proc pmem`, `/proc rss`, and `/proc vsz`
+  on the fallback, sourced from `VmRSS`, `VmSize`, and `MemTotal`.
+- Redirected `ps` stderr to `/dev/null` so usage messages are not parsed as
+  output.
+
 ## 2.0.0 (release candidate)
 
 - Added `mix escript.build` as an alternative source build for the controller,
diff --git a/install.sh b/install.sh
index ab6e619..d316a3e 100755
--- a/install.sh
+++ b/install.sh
@@ -2,8 +2,8 @@
 
 set -eu
 
-VERSION=2.0.0
-RELEASE_URL="https://github.com/zhongwencool/observer_cli/releases/download/v$VERSION"
+VERSION=2.1.0
+RELEASE_URL="https://github.com/smartrent/observer_cli/releases/download/v$VERSION"
 INSTALL_DIR="$HOME/.local/bin"
 
 for cmd in curl erl escript awk install; do
diff --git a/mix.exs b/mix.exs
index d51a88d..76e293d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule ObserverCli.MixProject do
   def project do
     [
       app: :observer_cli,
-      version: "2.0.0",
+      version: "2.1.0",
       language: :erlang,
       description: "Production-ready BEAM diagnostics for operators, automation, and AI agents.",
       escript: [
diff --git a/scripts/escript-smoke.sh b/scripts/escript-smoke.sh
index a470894..66ef374 100755
--- a/scripts/escript-smoke.sh
+++ b/scripts/escript-smoke.sh
@@ -129,7 +129,7 @@ check "short help" 0 "Usage:" empty -h
 check "otp-state help" 0 "observer_cli otp-state" empty otp-state --help
 check "logs help" 0 "observer_cli logs" empty logs --help
 check "trace call help" 0 "observer_cli trace call" empty trace call --help
-check "version" 0 "observer_cli 2.0.0" empty --version
+check "version" 0 "observer_cli 2.1.0" empty --version
 check "unknown option" 2 empty "observer_cli --help" --bogus
 check "removed positional TUI shorthand" 2 empty "unknown command: target@host" target@host
 check "removed gen-server-state command" 2 empty "unknown command: gen-server-state" gen-server-state init
diff --git a/src/observer_cli.app.src b/src/observer_cli.app.src
index f4df1d0..ec59a21 100644
--- a/src/observer_cli.app.src
+++ b/src/observer_cli.app.src
@@ -1,6 +1,6 @@
 {application, observer_cli, [
     {description, "Production-ready BEAM diagnostics for operators, automation, and AI agents."},
-    {vsn, "2.0.0"},
+    {vsn, "2.1.0"},
     {modules, [observer_cli]},
     {registered, []},
     {applications, [kernel, stdlib, crypto, recon]},
diff --git a/src/observer_cli_lib.erl b/src/observer_cli_lib.erl
index c931b05..b63e658 100644
--- a/src/observer_cli_lib.erl
+++ b/src/observer_cli_lib.erl
@@ -552,7 +552,7 @@ resolve_ps_cmd(Cmd, ParseOutput) ->
         _Accepted -> Cmd
     end.
 
-%% @doc Reads one "Field:  <N> kB" line from /proc/<Pid>/status, e.g. VmRSS.
+%% @doc Reads one "Field:  &lt;N&gt; kB" line from /proc/&lt;Pid&gt;/status, e.g. VmRSS.
 -spec proc_status_field_kb(string(), string()) -> non_neg_integer() | undefined.
 proc_status_field_kb(Pid, Field) ->
     case file:read_file("/proc/" ++ Pid ++ "/status") of
diff --git a/src/observer_cli_snapshot.erl b/src/observer_cli_snapshot.erl
index b7bf9ac..562b700 100644
--- a/src/observer_cli_snapshot.erl
+++ b/src/observer_cli_snapshot.erl
@@ -162,7 +162,7 @@
 -endif.
 
 -define(PROTOCOL_VERSION, 1).
--define(BUNDLE_VERSION, <<"2.0.0">>).
+-define(BUNDLE_VERSION, <<"2.1.0">>).
 -define(TARGET_MARGIN_MS, 1000).
 -define(WORKER_DOWN_TIMEOUT_MS, 100).
 -define(DEEP_FINISH_MARGIN_MS, 250).
diff --git a/test/observer_cli_cli_test.erl b/test/observer_cli_cli_test.erl
index 28db916..216728e 100644
--- a/test/observer_cli_cli_test.erl
+++ b/test/observer_cli_cli_test.erl
@@ -1337,7 +1337,7 @@ health_command_text_reports_test() ->
     ).
 
 command_text_and_error_encoding_test() ->
-    Capabilities = #{<<"protocol_version">> => 1, <<"bundle_version">> => <<"2.0.0">>},
+    Capabilities = #{<<"protocol_version">> => 1, <<"bundle_version">> => <<"2.1.0">>},
     ContextData = #{
         <<"node">> => <<"target@host">>,
         <<"name_mode">> => <<"short">>,
@@ -1456,7 +1456,7 @@ command_text_and_error_encoding_test() ->
     ).
 
 text_encoder_public_edge_contract_test() ->
-    Capabilities = #{<<"protocol_version">> => 1, <<"bundle_version">> => <<"2.0.0">>},
+    Capabilities = #{<<"protocol_version">> => 1, <<"bundle_version">> => <<"2.1.0">>},
     Incompatible = observer_cli_cli:response(
         connect,
         complete,
diff --git a/test/observer_cli_escriptize_test.erl b/test/observer_cli_escriptize_test.erl
index 688ab9c..2fb5b4b 100644
--- a/test/observer_cli_escriptize_test.erl
+++ b/test/observer_cli_escriptize_test.erl
@@ -1396,7 +1396,7 @@ command_help_test() ->
         24, 80, [], fun() -> observer_cli_escriptize:main(["--version"]) end
     ),
     observer_cli_test_io:assert_stable_fragments(Version, [
-        "observer_cli 2.0.0", "observer_cli.cli/v1", "protocol 1", "controller OTP"
+        "observer_cli 2.1.0", "observer_cli.cli/v1", "protocol 1", "controller OTP"
     ]),
     ?assertEqual(nonode@nohost, node()).
 
@@ -3532,7 +3532,7 @@ dynamic_controller_handshake() ->
     RandomCookie = binary_to_atom(binary:encode_hex(RandomBytes)),
     try
         ?assertEqual(
-            {ok, #{bundle_version => <<"2.0.0">>, protocol_version => 1}},
+            {ok, #{bundle_version => <<"2.1.0">>, protocol_version => 1}},
             observer_cli_escriptize:connect_target(
                 Target,
                 shortnames,
@@ -3589,7 +3589,7 @@ invalid_remote_dispatch_contract() ->
         <<
             "-module(observer_cli_snapshot).\n"
             "-export([capabilities/0, dispatch/4]).\n"
-            "capabilities() -> #{bundle_version => <<\"2.0.0\">>, protocol_version => 1}.\n"
+            "capabilities() -> #{bundle_version => <<\"2.1.0\">>, protocol_version => 1}.\n"
             "dispatch(_, _, _, _) -> #{invalid => true}.\n"
         >>
     ),
@@ -4055,7 +4055,7 @@ diagnose_escript_with_dispatch(Escript, Script, CookieEnv, ExitCode, DispatchRes
     Contents = io_lib:format(
         "-module(observer_cli_snapshot).~n"
         "-export([capabilities/0,dispatch/4]).~n"
-        "capabilities() -> #{bundle_version => <<\"2.0.0\">>, protocol_version => 1}.~n"
+        "capabilities() -> #{bundle_version => <<\"2.1.0\">>, protocol_version => 1}.~n"
         "dispatch(_,diagnose,_,_) -> ~s.~n",
         [DispatchResult]
     ),
@@ -4354,12 +4354,12 @@ response_validation_boundaries_test() ->
         observer_cli_escriptize:capabilities(node(), 0)
     ),
     ?assertEqual(
-        {ok, #{bundle_version => <<"2.0.0">>, protocol_version => 1}},
+        {ok, #{bundle_version => <<"2.1.0">>, protocol_version => 1}},
         observer_cli_escriptize:capabilities(node(), 1000)
     ),
     ?assert(
         observer_cli_escriptize:compatible_capabilities(#{
-            bundle_version => <<"2.0.0">>, protocol_version => 1, extra => supported
+            bundle_version => <<"2.1.0">>, protocol_version => 1, extra => supported
         })
     ),
     ?assertNot(observer_cli_escriptize:compatible_capabilities(#{protocol_version => 1})),
@@ -5128,7 +5128,7 @@ assert_partial_snapshot_exit(Escript, Script, CookieEnv) ->
         io_lib:format(
             "-module(observer_cli_snapshot).~n"
             "-export([capabilities/0,dispatch/4]).~n"
-            "capabilities() -> #{bundle_version => <<\"2.0.0\">>, protocol_version => 1}.~n"
+            "capabilities() -> #{bundle_version => <<\"2.1.0\">>, protocol_version => 1}.~n"
             "dispatch(_,snapshot,_,_) -> ~tp.~n",
             [
                 #{
diff --git a/test/observer_cli_snapshot_test.erl b/test/observer_cli_snapshot_test.erl
index 9ca7041..67a5728 100644
--- a/test/observer_cli_snapshot_test.erl
+++ b/test/observer_cli_snapshot_test.erl
@@ -19,7 +19,7 @@
 
 capabilities_test() ->
     Capabilities = observer_cli_snapshot:capabilities(),
-    ?assertEqual(#{bundle_version => <<"2.0.0">>, protocol_version => 1}, Capabilities),
+    ?assertEqual(#{bundle_version => <<"2.1.0">>, protocol_version => 1}, Capabilities),
     _ = application:load(observer_cli),
     {ok, Version} = application:get_key(observer_cli, vsn),
     ?assertEqual(list_to_binary(Version), maps:get(bundle_version, Capabilities)).