HLab Executor Skill

Coding Standards (Strict Enforcement)

1. Header: All scripts must start with #!/usr/bin/env bash and set -euo pipefail.
2. Variables: All variables must be quoted: "${VAR}".
3. Paths: Use "${REPO_ROOT}/...". Never rely on relative cd.
4. Logging:
   • Wizard: Use echo for user prompts.
   • Executor: Use log_info/log_error (from lib/common.sh) which writes to /var/log/horizon.log. DO NOT spam the user's screen with apt-get output.
5. Idempotency: "Install OLS" script must run successfully even if OLS is already installed (check before install).

Prohibitions

• NO read commands in Executors. If you need input, assume it's in the environment variable sourced from the Wizard.
• NO curl | bash. All downloads must have a checksum verification or use apt/yum.
• NO sudo inside scripts. Check for EUID==0 at the start.

Integration

• Always source "${REPO_ROOT}/lib/common.sh" at the beginning.
• If a "Pro" feature hook is defined in the Spec, add try_load_module "pro/seo_optimizer" logic.