diff --git a/src/local-mounts/README.md b/src/local-mounts/README.md
index c38a453..766f9c3 100644
--- a/src/local-mounts/README.md
+++ b/src/local-mounts/README.md
@@ -60,7 +60,7 @@ For **optimal reliability** (especially across container rebuilds and reconnecti
 ```bash
 # Stable SSH agent socket (optional, recommended for devcontainers)
 export SSH_AUTH_SOCK="$HOME/.ssh/agent.sock"
-if [[ ! -S "$SSH_AUTH_SOCK" ]]; then
+if ! ssh-add -l &>/dev/null; then
     rm -f "$SSH_AUTH_SOCK"
     eval "$(ssh-agent -a "$SSH_AUTH_SOCK")" >/dev/null
     ssh-add 2>/dev/null
@@ -72,7 +72,7 @@ fi
 ```bash
 # Stable SSH agent socket (optional, recommended for devcontainers)
 export SSH_AUTH_SOCK="$HOME/.ssh/agent.sock"
-if [ ! -S "$SSH_AUTH_SOCK" ]; then
+if ! ssh-add -l >/dev/null 2>&1; then
     rm -f "$SSH_AUTH_SOCK"
     eval "$(ssh-agent -a "$SSH_AUTH_SOCK")" > /dev/null
     ssh-add 2>/dev/null
@@ -83,7 +83,7 @@ fi
 
 ```bash
 export SSH_AUTH_SOCK="$HOME/.ssh/agent.sock"
-if [[ ! -S "$SSH_AUTH_SOCK" ]]; then
+if ! ssh-add -l &>/dev/null; then
     rm -f "$SSH_AUTH_SOCK"
     eval "$(ssh-agent -a "$SSH_AUTH_SOCK")" >/dev/null
     ssh-add --apple-use-keychain 2>/dev/null
diff --git a/src/local-mounts/devcontainer-feature.json b/src/local-mounts/devcontainer-feature.json
index 88d6d20..b9805b3 100644
--- a/src/local-mounts/devcontainer-feature.json
+++ b/src/local-mounts/devcontainer-feature.json
@@ -1,6 +1,6 @@
 {
   "id": "local-mounts",
-  "version": "1.0.7",
+  "version": "1.0.8",
   "name": "Local Development Files Mount",
   "description": "Mounts local Git, SSH, GPG, and npm configuration files into the devcontainer with support for custom usernames. Uses runtime SSH agent detection with fallback to VS Code native forwarding.",
   "documentationURL": "https://github.com/helpers4/devcontainer/tree/main/features/local-mounts",
diff --git a/src/local-mounts/install.sh b/src/local-mounts/install.sh
index 68e697b..c011e04 100644
--- a/src/local-mounts/install.sh
+++ b/src/local-mounts/install.sh
@@ -53,7 +53,10 @@ _sync_dir_from_mount() {
 
     if [ -d "${source_dir}" ]; then
         mkdir -p "${target_dir}" 2>/dev/null || true
-        cp -a "${source_dir}/." "${target_dir}/" 2>/dev/null || true
+        if ! cp -a "${source_dir}/." "${target_dir}/" 2>/dev/null; then
+            echo "⚠️  cp -a failed for ${config_name}, falling back to file-by-file copy"
+            find "${source_dir}" -maxdepth 1 -type f -exec cp -f {} "${target_dir}/" \;
+        fi
         echo "✅ ${config_name} synchronized to ${target_dir}"
     elif [ ! -d "${target_dir}" ]; then
         mkdir -p "${target_dir}" 2>/dev/null || true
@@ -87,18 +90,22 @@ _sync_file_from_mount "${SOURCE_HOME}/.npmrc" "${TARGET_HOME}/.npmrc" ".npmrc"
 # Explicitly ensure SSH keys/config and GPG private keys are synced
 # ============================================================================
 
-# Ensure SSH keys and config are synced
+# Ensure ALL SSH files are synced (not just id_* keys)
 if [ -d "${SOURCE_HOME}/.ssh" ]; then
-    for f in "${SOURCE_HOME}/.ssh/id_"*; do
-        [ -f "$f" ] && cp -f "$f" "${TARGET_HOME}/.ssh/" 2>/dev/null || true
-    done
-    [ -f "${SOURCE_HOME}/.ssh/config" ] && \
-        cp -f "${SOURCE_HOME}/.ssh/config" "${TARGET_HOME}/.ssh/" 2>/dev/null || true
-    chmod 700 "${TARGET_HOME}/.ssh" 2>/dev/null || true
-    find "${TARGET_HOME}/.ssh" -name "id_*" ! -name "*.pub" -exec chmod 600 {} \; 2>/dev/null || true
-    find "${TARGET_HOME}/.ssh" -name "*.pub" -exec chmod 644 {} \; 2>/dev/null || true
-    [ -f "${TARGET_HOME}/.ssh/config" ] && chmod 600 "${TARGET_HOME}/.ssh/config" 2>/dev/null || true
-    echo "✅ SSH keys and config synchronized"
+    find "${SOURCE_HOME}/.ssh" -maxdepth 1 -type f -exec cp -f {} "${TARGET_HOME}/.ssh/" \;
+    # Fix permissions
+    chmod 700 "${TARGET_HOME}/.ssh"
+    find "${TARGET_HOME}/.ssh" -name "id_*" ! -name "*.pub" -exec chmod 600 {} \;
+    find "${TARGET_HOME}/.ssh" -name "*.pub" -exec chmod 644 {} \;
+    [ -f "${TARGET_HOME}/.ssh/config" ] && chmod 600 "${TARGET_HOME}/.ssh/config"
+    # Verify sync completeness
+    SOURCE_COUNT=$(find "${SOURCE_HOME}/.ssh" -maxdepth 1 -type f 2>/dev/null | wc -l)
+    TARGET_COUNT=$(find "${TARGET_HOME}/.ssh" -maxdepth 1 -type f 2>/dev/null | wc -l)
+    if [ "$SOURCE_COUNT" -gt 0 ] && [ "$TARGET_COUNT" -lt "$SOURCE_COUNT" ]; then
+        echo "⚠️  SSH sync incomplete: ${TARGET_COUNT}/${SOURCE_COUNT} files copied"
+    else
+        echo "✅ SSH files synchronized (${TARGET_COUNT} files)"
+    fi
 fi
 
 # Ensure GPG private keys are synced
@@ -162,20 +169,29 @@ echo ""
 
 cat > /etc/profile.d/local-mounts-ssh.sh << 'PROFILE_EOF'
 # local-mounts: SSH agent socket detection (runtime)
+# ssh-add -l exits: 0 = keys loaded, 1 = no keys, 2 = cannot connect
+# We accept 0 and 1 (agent alive), reject only 2 (dead/missing agent)
 _LOCAL_MOUNTS_SSH_SOCK="/tmp/local-mounts/.ssh/agent.sock"
 
-if [ -S "$_LOCAL_MOUNTS_SSH_SOCK" ]; then
-    # Stable host socket is mounted and active
+_ssh_agent_responds() {
+    local _rc=0
+    SSH_AUTH_SOCK="$1" ssh-add -l >/dev/null 2>&1 || _rc=$?
+    [ "$_rc" -ne 2 ]
+}
+
+if [ -S "$_LOCAL_MOUNTS_SSH_SOCK" ] && _ssh_agent_responds "$_LOCAL_MOUNTS_SSH_SOCK"; then
+    # Stable host socket is mounted and agent responds
     export SSH_AUTH_SOCK="$_LOCAL_MOUNTS_SSH_SOCK"
-elif [ -n "$SSH_AUTH_SOCK" ] && [ -S "$SSH_AUTH_SOCK" ]; then
+elif [ -n "$SSH_AUTH_SOCK" ] && [ -S "$SSH_AUTH_SOCK" ] && _ssh_agent_responds "$SSH_AUTH_SOCK"; then
     # VS Code's native SSH agent forwarding is working — keep it
     :
-elif [ -S "/ssh-agent" ]; then
+elif [ -S "/ssh-agent" ] && _ssh_agent_responds "/ssh-agent"; then
     # Legacy external mount
     export SSH_AUTH_SOCK="/ssh-agent"
 fi
 
 unset _LOCAL_MOUNTS_SSH_SOCK
+unset -f _ssh_agent_responds
 PROFILE_EOF
 
 chmod +x /etc/profile.d/local-mounts-ssh.sh
diff --git a/src/peon-ping/README.md b/src/peon-ping/README.md
index 302424f..ad2e481 100644
--- a/src/peon-ping/README.md
+++ b/src/peon-ping/README.md
@@ -105,7 +105,7 @@ Or add it to your devcontainer.json:
 }
 ```
 
-This creates hooks for `sessionStart`, `userPromptSubmitted`, `postToolUse`, and `errorOccurred` events using the Copilot adapter.
+This creates hooks for `SessionStart`, `UserPromptSubmit`, `PostToolUse`, and `Stop` events using the Copilot adapter.
 
 ### Cursor
 
diff --git a/src/peon-ping/devcontainer-feature.json b/src/peon-ping/devcontainer-feature.json
index e07d3bf..b4a380d 100644
--- a/src/peon-ping/devcontainer-feature.json
+++ b/src/peon-ping/devcontainer-feature.json
@@ -1,6 +1,6 @@
 {
   "id": "peon-ping",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "name": "Peon Ping — AI Agent Sound Notifications",
   "description": "Installs peon-ping and the Peon Pet VS Code extension for game character voice notifications when your AI coding agent finishes or needs permission. Supports VS Code/Copilot, Cursor, and Codex with audio relay for devcontainers.",
   "documentationURL": "https://github.com/helpers4/devcontainer/tree/main/src/peon-ping",
diff --git a/src/peon-ping/install.sh b/src/peon-ping/install.sh
index 8953950..6f2272a 100644
--- a/src/peon-ping/install.sh
+++ b/src/peon-ping/install.sh
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
-# Peon Ping DevContainer Feature
-# Copyright (c) 2025 helpers4
-# Licensed under LGPL-3.0 - see LICENSE file for details
+# This file is part of helpers4.
+# Copyright (C) 2025 baxyz
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 # Installs peon-ping and configures multi-IDE hooks for AI agent sound notifications
 
@@ -14,6 +14,15 @@ NO_RC="${NORC:-"true"}"
 IDE_SETUP="${IDESETUP:-"vscode"}"
 VOLUME="${VOLUME:-"0.5"}"
 
+# Validate volume is a valid float between 0.0 and 1.0
+if ! echo "${VOLUME}" | grep -qE '^[0-9]+(\.[0-9]+)?$'; then
+    echo "⚠️  Invalid volume '${VOLUME}', falling back to 0.5"
+    VOLUME="0.5"
+elif ! awk "BEGIN { v=${VOLUME}; exit (v >= 0.0 && v <= 1.0) ? 0 : 1 }"; then
+    echo "⚠️  Volume '${VOLUME}' out of range [0.0–1.0], clamping to 0.5"
+    VOLUME="0.5"
+fi
+
 USERNAME="${USERNAME:-"${_REMOTE_USER:-"automatic"}"}"
 
 if [ "$(id -u)" -ne 0 ]; then
@@ -113,14 +122,18 @@ PEON_CONFIG="${PEON_CONFIG_DIR}/config.json"
 if [ -f "${PEON_CONFIG}" ] && command -v python3 > /dev/null 2>&1; then
     echo "🔧 Setting volume to ${VOLUME}..."
     python3 << PYEOF
-import json
+import json, sys
+
 path = "${PEON_CONFIG}"
-with open(path) as f:
-    cfg = json.load(f)
-cfg["volume"] = float("${VOLUME}")
-with open(path, "w") as f:
-    json.dump(cfg, f, indent=2)
-    f.write("\n")
+try:
+    with open(path) as f:
+        cfg = json.load(f)
+    cfg["volume"] = max(0.0, min(1.0, float("${VOLUME}")))
+    with open(path, "w") as f:
+        json.dump(cfg, f, indent=2)
+        f.write("\n")
+except (json.JSONDecodeError, ValueError, OSError) as e:
+    print(f"⚠️  Could not update volume in {path}: {e}", file=sys.stderr)
 PYEOF
 fi
 
@@ -146,15 +159,24 @@ merge_hooks_json() {
     local new_hooks="$2"
 
     python3 << PYEOF
-import json, os
+import json, os, sys
 
 target_path = "${target}"
-new_hooks = json.loads("""${new_hooks}""")
-
-if os.path.exists(target_path):
-    with open(target_path) as f:
-        data = json.load(f)
-else:
+try:
+    new_hooks = json.loads("""${new_hooks}""")
+except json.JSONDecodeError as e:
+    print(f"⚠️  Invalid hooks JSON: {e}", file=sys.stderr)
+    sys.exit(0)
+
+try:
+    if os.path.exists(target_path):
+        with open(target_path) as f:
+            data = json.load(f)
+    else:
+        os.makedirs(os.path.dirname(target_path), exist_ok=True)
+        data = {"version": 1, "hooks": {}}
+except (json.JSONDecodeError, OSError) as e:
+    print(f"⚠️  Could not read {target_path}, creating fresh: {e}", file=sys.stderr)
     os.makedirs(os.path.dirname(target_path), exist_ok=True)
     data = {"version": 1, "hooks": {}}
 
@@ -164,14 +186,16 @@ for event, entries in new_hooks.items():
     event_list = existing_hooks.setdefault(event, [])
     existing_cmds = [e.get("bash", e.get("command", "")) for e in event_list]
     for entry in entries:
-        cmd = entry.get("bash", entry.get("command", ""))
         if not any("peon-ping" in c for c in existing_cmds):
             event_list.append(entry)
 
 data["hooks"] = existing_hooks
-with open(target_path, "w") as f:
-    json.dump(data, f, indent=2)
-    f.write("\n")
+try:
+    with open(target_path, "w") as f:
+        json.dump(data, f, indent=2)
+        f.write("\n")
+except OSError as e:
+    print(f"⚠️  Could not write {target_path}: {e}", file=sys.stderr)
 PYEOF
 }
 
@@ -195,24 +219,31 @@ HOOKS_FILE="${HOOKS_DIR}/hooks.json"
 mkdir -p "${HOOKS_DIR}"
 
 if [ -f "${HOOKS_FILE}" ]; then
-    python3 << 'PYEOF'
-import json, os
+    HOOKS_FILE="${HOOKS_FILE}" python3 << 'PYEOF'
+import json, os, sys
 
 path = os.environ.get("HOOKS_FILE", ".github/hooks/hooks.json")
 if not os.path.exists(path):
-    exit(0)
+    sys.exit(0)
 
-with open(path) as f:
-    data = json.load(f)
+try:
+    with open(path) as f:
+        data = json.load(f)
+except (json.JSONDecodeError, OSError) as e:
+    print(f"⚠️  Could not read {path}: {e}", file=sys.stderr)
+    data = {"version": 1, "hooks": {}}
 
 hooks = data.setdefault("hooks", {})
-new_entries = {
-    "sessionStart":          [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh sessionStart"}],
-    "userPromptSubmitted":   [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh userPromptSubmitted"}],
-    "postToolUse":           [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh postToolUse"}],
-    "errorOccurred":         [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh errorOccurred"}]
-}
 
+# VS Code hook event names (PascalCase, auto-mapped from lowerCamelCase by VS Code).
+# See https://code.visualstudio.com/docs/copilot/customization/hooks#_hook-lifecycle-events
+# VS Code/Copilot hook event names as written in hooks.json.
+    "SessionStart":        [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh SessionStart"}],
+    "UserPromptSubmit":    [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh UserPromptSubmit"}],
+    "PostToolUse":         [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh PostToolUse"}],
+    "Stop":                [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh Stop"}]
+}
+    "ErrorOccurred":       [{"type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh ErrorOccurred"}]
 for event, entries in new_entries.items():
     event_list = hooks.setdefault(event, [])
     existing_cmds = [e.get("bash", e.get("command", "")) for e in event_list]
@@ -221,26 +252,29 @@ for event, entries in new_entries.items():
             event_list.append(entry)
 
 data["hooks"] = hooks
-with open(path, "w") as f:
-    json.dump(data, f, indent=2)
-    f.write("\n")
+try:
+    with open(path, "w") as f:
+        json.dump(data, f, indent=2)
+        f.write("\n")
+except OSError as e:
+    print(f"⚠️  Could not write {path}: {e}", file=sys.stderr)
 PYEOF
 else
     cat > "${HOOKS_FILE}" << 'JSONEOF'
 {
   "version": 1,
   "hooks": {
-    "sessionStart": [
-      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh sessionStart" }
+    "SessionStart": [
+      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh SessionStart" }
     ],
-    "userPromptSubmitted": [
-      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh userPromptSubmitted" }
+    "UserPromptSubmit": [
+      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh UserPromptSubmit" }
     ],
-    "postToolUse": [
-      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh postToolUse" }
+    "PostToolUse": [
+      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh PostToolUse" }
     ],
-    "errorOccurred": [
-      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh errorOccurred" }
+    "Stop": [
+      { "type": "command", "bash": "bash ~/.claude/hooks/peon-ping/adapters/copilot.sh Stop" }
     ]
   }
 }