feat: HIIT countdown timer with auto set/rest cycling

.claude/hooks/session-start.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+# Installs the Android SDK + cmdline-tools needed to run `./gradlew lintDebug`
+# and `./gradlew testDebugUnitTest` in the remote Claude Code session.
+#
+# Only runs in the remote environment.
+set -euo pipefail
+
+if [ "${CLAUDE_CODE_REMOTE:-}" != "true" ]; then
+  exit 0
+fi
+
+ANDROID_SDK_ROOT="${ANDROID_SDK_ROOT:-$HOME/android-sdk}"
+CMDLINE_TOOLS_VERSION="11076708"   # commandlinetools-linux-11076708_latest.zip
+PLATFORM_API="37.0"
+BUILD_TOOLS="37.0.0"
+
+mkdir -p "$ANDROID_SDK_ROOT"
+
+if [ ! -x "$ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager" ]; then
+  echo "Installing Android cmdline-tools…"
+  TMP_ZIP="$(mktemp -d)/cmdline-tools.zip"
+  curl -fsSL -o "$TMP_ZIP" \
+    "https://dl.google.com/android/repository/commandlinetools-linux-${CMDLINE_TOOLS_VERSION}_latest.zip"
+  rm -rf "$ANDROID_SDK_ROOT/cmdline-tools"
+  mkdir -p "$ANDROID_SDK_ROOT/cmdline-tools"
+  unzip -q "$TMP_ZIP" -d "$ANDROID_SDK_ROOT/cmdline-tools"
+  mv "$ANDROID_SDK_ROOT/cmdline-tools/cmdline-tools" "$ANDROID_SDK_ROOT/cmdline-tools/latest"
+  rm -f "$TMP_ZIP"
+fi
+
+export ANDROID_SDK_ROOT
+export ANDROID_HOME="$ANDROID_SDK_ROOT"
+export PATH="$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$ANDROID_SDK_ROOT/platform-tools:$PATH"
+
+yes 2>/dev/null | sdkmanager --licenses >/dev/null || true
+
+sdkmanager --install \
+  "platforms;android-${PLATFORM_API}" \
+  "build-tools;${BUILD_TOOLS}" \
+  "platform-tools" >/dev/null
+
+# Persist for the rest of the session.
+{
+  echo "export ANDROID_SDK_ROOT=\"$ANDROID_SDK_ROOT\""
+  echo "export ANDROID_HOME=\"$ANDROID_SDK_ROOT\""
+  echo "export PATH=\"$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$ANDROID_SDK_ROOT/platform-tools:\$PATH\""
+} >> "$CLAUDE_ENV_FILE"
+
+echo "Android SDK ready at $ANDROID_SDK_ROOT"

.claude/settings.json

@@ -0,0 +1,14 @@
+{
+  "hooks": {
+    "SessionStart": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/session-start.sh"
+          }
+        ]
+      }
+    ]
+  }
+}