HUD Setup Skill

This skill configures the Oh-My-Toong HUD to display in Claude Code's status bar. Setup, restore, and backup all self-locate via ${CLAUDE_SKILL_DIR} substitution — no branch logic. The same skill source produces correct behavior whether deployed user-globally (~/.claude/skills/hud/) or project-locally (<project>/.claude/skills/hud/).

Usage

/hud setup    # Install and configure HUD
/hud restore  # Restore previous statusLine configuration

Setup Process

When user runs /hud setup:

1. Check dependencies

   • Run bun --version to verify Bun is installed.
   • Run jq --version to verify jq is installed.
   • If either is unavailable, inform user and stop.

2. Resolve self-located paths

   !`
   set -euo pipefail
   SETTINGS_FILE="${CLAUDE_SKILL_DIR}/../../settings.local.json"
   BACKUP_FILE="${CLAUDE_SKILL_DIR}/../../statusLine.backup.json"
   SCRIPT_PATH="${CLAUDE_SKILL_DIR}/scripts/index.ts"
   echo "SETTINGS_FILE=$SETTINGS_FILE"
   echo "BACKUP_FILE=$BACKUP_FILE"
   echo "SCRIPT_PATH=$SCRIPT_PATH"
   `
   

3. Verify hud script exists

   • Confirm $SCRIPT_PATH (which is ${CLAUDE_SKILL_DIR}/scripts/index.ts) exists.
   • If missing, inform user to run make sync first and stop.

4. Backup existing statusLine config (first-time-only invariant)

   !`
   set -euo pipefail
   SETTINGS_FILE="${CLAUDE_SKILL_DIR}/../../settings.local.json"
   BACKUP_FILE="${CLAUDE_SKILL_DIR}/../../statusLine.backup.json"
   
   if [ -e "$BACKUP_FILE" ]; then
     echo "backup exists — skipping (first-time-only invariant preserved)"
     echo "BACKUP_FILE=$BACKUP_FILE"
     exit 0
   fi
   
   SETTINGS_CONTENT="{}"
   if [ -f "$SETTINGS_FILE" ]; then
     SETTINGS_CONTENT="$(cat "$SETTINGS_FILE")"
   fi
   
   if echo "$SETTINGS_CONTENT" | jq -e 'has("statusLine")' > /dev/null 2>&1; then
     echo "$SETTINGS_CONTENT" | jq '.statusLine' > "${BACKUP_FILE}.tmp"
     mv "${BACKUP_FILE}.tmp" "$BACKUP_FILE"
     echo "backed up existing statusLine to $BACKUP_FILE"
   else
     echo '{}' > "${BACKUP_FILE}.tmp"
     mv "${BACKUP_FILE}.tmp" "$BACKUP_FILE"
     echo "wrote sentinel {} to $BACKUP_FILE (no prior statusLine)"
   fi
   `
   

   The first-time-only invariant ensures the original user statusLine is preserved on first setup; subsequent setups must not overwrite the backup with hud's own value. The sentinel {} represents "no prior statusLine existed" so /hud restore knows to remove the key on restore.

5. Update settings.local.json with hud statusLine (always executed — supports upgrades)

   !`
   set -euo pipefail
   SETTINGS_FILE="${CLAUDE_SKILL_DIR}/../../settings.local.json"
   SCRIPT_PATH="${CLAUDE_SKILL_DIR}/scripts/index.ts"
   
   if [ ! -f "$SETTINGS_FILE" ]; then
     echo '{}' > "$SETTINGS_FILE"
   fi
   
   jq --arg cmd "bun run $SCRIPT_PATH" \
      '.statusLine = {"type":"command","command":$cmd}' \
      "$SETTINGS_FILE" > "${SETTINGS_FILE}.tmp"
   mv "${SETTINGS_FILE}.tmp" "$SETTINGS_FILE"
   
   echo "Updated statusLine.command to: bun run $SCRIPT_PATH"
   `
   

   ${CLAUDE_SKILL_DIR} is substituted by Claude Code at preprocessing time, so $SCRIPT_PATH resolves to an absolute path (e.g., /Users/toong/.claude/skills/hud/scripts/index.ts for user-global, or /Users/toong/repos/<project>/.claude/skills/hud/scripts/index.ts for project-local). The jq invocation preserves all other keys in settings.local.json — only .statusLine is updated.

6. Inform user

   • Display success message including the deployed statusLine.command value (so user can verify the absolute path).
   • Instruct user to restart Claude Code.

Restore Process

When user runs /hud restore:

1. Resolve self-located paths

   !`
   set -euo pipefail
   SETTINGS_FILE="${CLAUDE_SKILL_DIR}/../../settings.local.json"
   BACKUP_FILE="${CLAUDE_SKILL_DIR}/../../statusLine.backup.json"
   echo "SETTINGS_FILE=$SETTINGS_FILE"
   echo "BACKUP_FILE=$BACKUP_FILE"
   `
   

2. Check ${CLAUDE_SKILL_DIR}/../../statusLine.backup.json exists.

3. Restore based on backup content

   !`
   set -euo pipefail
   SETTINGS_FILE="${CLAUDE_SKILL_DIR}/../../settings.local.json"
   BACKUP_FILE="${CLAUDE_SKILL_DIR}/../../statusLine.backup.json"
   
   if [ ! -e "$BACKUP_FILE" ]; then
     echo "no backup found — nothing to restore"
     exit 0
   fi
   
   BACKUP_CONTENT="$(cat "$BACKUP_FILE")"
   
   if [ ! -f "$SETTINGS_FILE" ]; then
     echo '{}' > "$SETTINGS_FILE"
   fi
   
   if [ "$(echo "$BACKUP_CONTENT" | jq -c '.')" = "{}" ]; then
     jq 'del(.statusLine)' "$SETTINGS_FILE" > "${SETTINGS_FILE}.tmp"
     echo "removed statusLine key (sentinel — pre-setup state restored)"
   else
     jq --argjson sl "$BACKUP_CONTENT" '.statusLine = $sl' "$SETTINGS_FILE" > "${SETTINGS_FILE}.tmp"
     echo "restored statusLine from backup"
   fi
   
   mv "${SETTINGS_FILE}.tmp" "$SETTINGS_FILE"
   rm -f "$BACKUP_FILE"
   echo "removed backup file"
   `
   

   The sentinel {} distinguishes "no prior statusLine existed" (remove key) from "user had a custom statusLine" (restore object).

Display Format

After setup, the HUD shows:

[OMC] ultrawork | ctx:67% | agents:2 | bg:1 | todos:2/5 | skill:prometheus

Elements

Element	Description
[OMC]	Oh-My-Toong prefix (always shown)
ultrawork	Ultrawork mode active
ctx:N%	Context window usage (green <70%, yellow 70-85%, red >85%)
agents:N	Running subagents count
bg:N	Background tasks count
todos:X/Y	Todo completion (green when done, yellow when pending)
skill:name	Active skill name (truncated to 15 chars)

Requirements

• Bun
• Claude Code with statusLine support
• macOS or Linux (Windows untested)