Suppress the eager-skills-index from the Hermes system prompt. Adds a config gate so the full 2,147+ skill catalog never burns into context — skill discovery routes through vault_skills_vault_skill_lookup on demand instead.
build_skills_system_prompt() in agent/prompt_builder.py eagerly builds an <available_skills> block containing every skill's name + description. At 2,147 skills this is ~100 KB per session — paid as tokens on every single API call regardless of whether those skills are needed.
Two-line config change + one code patch. Adds a skills.include_index_in_prompt flag that skips build_skills_system_prompt() entirely when false. Skill discovery falls back to vault_skills_vault_skill_lookup(query) on demand.
~/.hermes/config.yaml