diff --git a/desktop/scripts/check-file-sizes.mjs b/desktop/scripts/check-file-sizes.mjs
index 3983fa591d..2ed82c57e5 100644
--- a/desktop/scripts/check-file-sizes.mjs
+++ b/desktop/scripts/check-file-sizes.mjs
@@ -352,7 +352,10 @@ const overrides = new Map([
   // +19: codex-acp minimum-version gate — MIN_CODEX_ACP_VERSION plus the strict
   // three-component parse in probe_codex_acp_version, so an outdated 1.x adapter
   // is offered a reinstall instead of classifying as Available on major alone.
-  ["src-tauri/src/managed_agents/discovery.rs", 1860],
+  // +4 (1860 -> 1864): Hermes preset resolves via `hermes acp` with a comment
+  // explaining why the venv-only `hermes-acp` console script fails on a default
+  // install. Queued to split with the rest of this list.
+  ["src-tauri/src/managed_agents/discovery.rs", 1864],
   // BYOH — save_custom_harness_to_dir (backup-swap atomic write) + save_and_warm /
   // delete_and_warm (persist-mutex serialization for concurrent-safe registry
   // refresh, B-6). Also: id/collision/load/registry tests (from the file base) +
diff --git a/desktop/src-tauri/src/managed_agents/discovery.rs b/desktop/src-tauri/src/managed_agents/discovery.rs
index eecbf4de3e..5bd68d260a 100644
--- a/desktop/src-tauri/src/managed_agents/discovery.rs
+++ b/desktop/src-tauri/src/managed_agents/discovery.rs
@@ -1595,10 +1595,14 @@ const PRESET_HARNESSES: &[PresetHarness] = &[
     PresetHarness {
         id: "hermes",
         label: "Hermes Agent",
-        command: "hermes-acp",
-        args: &[],
+        // `hermes` is the launcher the Hermes installer writes to ~/.local/bin,
+        // which is on the login-shell PATH. The `hermes-acp` console script
+        // exists only inside Hermes' own venv, which is not, so resolving by
+        // that name fails on a default install.
+        command: "hermes",
+        args: &["acp"],
         install_instructions_url: "https://hermes-agent.nousresearch.com",
-        install_hint: "Buzz talks to Hermes Agent through its hermes-acp command.",
+        install_hint: "Buzz talks to Hermes Agent through its ACP mode (hermes acp).",
         underlying_cli: None,
     },
     PresetHarness {