ADR-0005: CLI output color scheme and formatting

Status: accepted | Date: 2026-01-17

References: RFC-0000

Context

CLI output uses plain text with no visual hierarchy. Users cannot quickly distinguish success from failure, or identify important values. Status messages blend together making output hard to scan.

Decision

Adopt semantic color scheme: Green for success, Red for errors, Yellow for warnings, Cyan for paths/IDs, Bold for emphasis. Use owo-colors crate (zero-cost, no deps). Auto-detect terminal color support. All output via ui module for consistency.

Consequences

Positive: Better UX, faster scanning, clearer status. Negative: One new dependency (owo-colors). Migration: All eprintln! calls routed through ui module.