Function seed_supervisor_session 

pub fn seed_supervisor_session(
    extra: &[String],
    repo_root: &Path,
    alt_settings: &[PathBuf],
) -> Vec<(PathBuf, PawError)>

Seeds the dev allowlist into every Claude settings target a supervisor session needs.

Targets:

• <repo>/.claude/settings.json — always written (its parent <repo>/.claude/ is created if absent).
• each path in alt_settings — a configured alternate settings file (resolved from [clis.<name>].settings_path). These are written only when their parent directory already exists; a target whose parent is absent is skipped, never created. The target set is config-driven — there is no hardcoded CLI name or path.

Each target is processed independently and failures are reported individually via the returned Vec; callers (e.g. cmd_supervisor) treat the per-target result as non-fatal and log warnings to stderr while continuing session start. Returns the empty vec on full success.