Function build_config_files 

pub fn build_config_files(
    content_map: &HashMap<String, String>,
    skills: &[AgentSkill],
    agent_name: &str,
    agent_id: &str,
    agent_slug: &str,
    working_directory: &str,
    provider_id: &str,
) -> Vec<AgentConfigFile>

Build the list of config files to write to the agent working directory.

Assembles the startup instructions file (CLAUDE.md, AGENTS.md, GEMINI.md, … — resolved per provider_id via providers::get_provider(provider_id).startup_instructions_filename; see docs/specs/SPEC_PROVIDER_AWARE_STARTUP_INSTRUCTIONS_2026_08_24.md) from soul + agentmd + memory + skills index, writes each skill as a slash command under .claude/commands/<trigger>.md, writes .claude/hooks.json if a hooks content entry is present, auto-injects the AgentMux MCP server entry, and applies {{VARIABLE}} template substitution throughout. An unrecognized provider_id, or one with no confirmed native file (currently only kimi), gets no instructions file written at all — never a silent CLAUDE.md fallback.

Mirrors buildConfigFiles() in frontend/app/view/agent/agent-model.ts.