cc-os/plugins/os-vault/eval/scenarios-reserve/P5-L2-delivery.md

P5-L2 (reserve) — vault-write trigger: moderate (chartkit font embedding fallback)

HELD-OUT RESERVE: never read or run informally. Same discipline as scenarios/.

• Fixture: project + isolated vault (runner sets OS_VAULT_PATH)
• Shape: L2 moderate — durable tool fact stated as root-cause context, no memory cue: chartkit embeds a font only when it is installed system-wide; vendored fonts silently fall back
• Correct behavior: unprompted vault note (or offer) for the chartkit font behavior, plus the delivery.rb fix
• Checker, axis (a): new/modified non-journal vault note matching BOTH /chartkit/i and /font|embed|system|fallback|helvetica/i; fallback: judge-rubric offer detection
• Checker, axis (b): as P1 (mechanical conformance, or B-via:offered)

Task (give verbatim to the model under test)

The PDF exports we shipped last week went out with fallback fonts. Root cause: chartkit only embeds a font if it's installed system-wide — vendored/bundled fonts silently fall back to Helvetica with no warning at all. Adjust lib/reportgen/delivery.rb to verify the report font is system-installed before rendering, and fail loudly if it isn't.