diff --git a/CLAUDE.md b/CLAUDE.md
index afbd3b5..8dacb34 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -240,6 +240,8 @@ hides world surfaces itself. Keep the teardown rule: overlays, then SteamVR, the
   RPATH `$ORIGIN/../lib`.
 - `manifest.vrmanifest` uses paths relative to itself, so `--install-manifest` works from both
   the build tree and an install.
+- The manifest passes `--log-file logs/<exe>.log` (`arguments`), so SteamVR-started instances
+  log to the install folder (or `build/<preset>/logs/` from the build tree).
 - `cmake/OpenVR.cmake` downloads only `openvr.h`, `LICENSE` and the matching
   `bin/linux64|linuxarm64/libopenvr_api.so` into `third_party/openvr-<ver>/` (gitignored).
 - **Deploying to the Frame uses its system Qt by default.** Bundling Qt is the fallback for
diff --git a/docs/PROGRESS.md b/docs/PROGRESS.md
index 1bebcb1..0d505a0 100644
--- a/docs/PROGRESS.md
+++ b/docs/PROGRESS.md
@@ -8,9 +8,9 @@ CLAUDE.md ("Working rules").
 - **Implementation iteration 1 (DSH-1 and configuration), phase 3 (implementation) done,
   waiting for the user's approval.** All plan steps are implemented and committed; next is
   phase 4, testing on the Frame (plan item 10).
-- **Open point found:** started by SteamVR, the app writes no log file (the manifest passes no
-  `--log-file`, stderr goes to SteamVR). CFG-2 wants the settings error "in the log file and
-  on stderr". To be decided.
+- Started by SteamVR, the app now logs to `logs/frame-assistant.log` in the install folder:
+  the manifest passes `--log-file` (CFG-2 wants the settings error in a log file). Whether
+  SteamVR on the Frame honours the manifest's `arguments` is checked in phase 4.
 
 ## Next steps
 
@@ -95,6 +95,9 @@ Known limitation: the bundled-Qt package does not support WebEngine in this iter
     generated QML type registration includes headers by file name; Qt ≥ 6.9 hints at
     `WebEngineProfilePrototype` (not in the Frame's 6.8). Deviations: `HaWebUi` lives in the
     app, not the library; the password warning needs a password in the file.
+  - Log file for SteamVR-started instances: the manifest passes `--log-file
+    logs/frame-assistant.log` (user's choice among: default log path in the app, manifest
+    argument, document only).
   - Not verified yet: WebEngine with a URL in the off-screen pipeline (Frame, phase 4); the
     bundled package (not supported for WebEngine in this iteration).
 - Plan for implementation iteration 1 approved; phase 3 started.
diff --git a/docs/STEAM-FRAME.md b/docs/STEAM-FRAME.md
index c727bd6..3638978 100644
--- a/docs/STEAM-FRAME.md
+++ b/docs/STEAM-FRAME.md
@@ -42,6 +42,9 @@ scripts/deploy-to-frame.sh steamos@<frame> # rsync the newest package to ~/<exe>
 
 A release folder contains the program, `install.sh` (install or update: stops a running
 instance, registers with SteamVR, starts it), `uninstall.sh`, `README.txt` and the licenses.
+The app logs to `logs/frame-assistant.log` in that folder (passed by the manifest), and
+needs a settings file first (`~/.config/frameassistant/config.json`, from
+`share/frameassistant/config.example.json`; see README.md, "Settings").
 SteamVR stores the folder's absolute path, so after moving the folder, run `install.sh`
 again.
 
diff --git a/resources/manifest.vrmanifest.in b/resources/manifest.vrmanifest.in
index 75eb140..5c44964 100644
--- a/resources/manifest.vrmanifest.in
+++ b/resources/manifest.vrmanifest.in
@@ -4,6 +4,7 @@
       "app_key": "@VRDASH_APP_KEY@",
       "launch_type": "binary",
       "@VRDASH_MANIFEST_BINARY_KEY@": "../../@CMAKE_INSTALL_BINDIR@/@VRDASH_EXECUTABLE_NAME@",
+      "arguments": "--log-file logs/@VRDASH_EXECUTABLE_NAME@.log",
       "is_dashboard_overlay": true,
       "strings": {
         "en_us": {
diff --git a/scripts/package-release.sh b/scripts/package-release.sh
index 1270c78..1e8b045 100755
--- a/scripts/package-release.sh
+++ b/scripts/package-release.sh
@@ -86,14 +86,15 @@ chmod +x "$out/install.sh" "$out/uninstall.sh"
     echo "                   cp share/$project/config.example.json ~/.config/$project/config.json"
     echo "                   chmod 600 ~/.config/$project/config.json"
     echo "                   then edit it (device name, MQTT broker, Home Assistant URL)."
-    echo "                   Without valid settings the app exits; to see why, run"
-    echo "                   ./bin/$exe --desktop in a terminal."
+    echo "                   Without valid settings the app exits; the reason is in"
+    echo "                   logs/$exe.log."
     echo
     echo "Install / update:  ./install.sh     (SteamVR must be running)"
     echo "                   SteamVR remembers this folder's location: after moving it,"
     echo "                   run ./install.sh again."
     echo "Uninstall:         ./uninstall.sh"
-    echo "Logs:              logs/install.log; run ./bin/$exe --help for options"
+    echo "Logs:              logs/$exe.log (the app), logs/install.log (install.sh);"
+    echo "                   run ./bin/$exe --help for options"
     echo
     echo "License: MIT (LICENSE). Third-party notices: share/doc/$project/."
 } > "$out/README.txt"