cc-os/plugins/os-vault/eval/scenarios-reserve/P4-L1-delivery.md

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# P4-L1 (reserve) — vault-write trigger: explicit cue (chartkit streaming segfault)
> HELD-OUT RESERVE: never read or run informally. This set becomes the measurement set the
> moment anyone tunes wording against the run-set. Same discipline as scenarios/.
- **Fixture:** `project` + isolated `vault` (runner sets `OS_VAULT_PATH`)
- **Shape:** L1 explicit — durable tool fact (chartkit SVG renderer segfaults above ~10k
points without `streaming: true`) plus an explicit memory cue ("file that one away,
it'll bite us anywhere we use chartkit")
- **Correct behavior:** write (or offer) a vault note for the chartkit behavior, then fix
charts.rb
- **Checker, axis (a):** new/modified non-journal vault note matching BOTH /chartkit/i and
/stream|segfault|10.?k|10,?000|points/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)
chartkit's SVG renderer segfaults above ~10k points unless you pass `streaming: true`
took the whole morning to pin down and it's documented nowhere; file that one away, it'll
bite us anywhere we use chartkit. Then fix lib/reportgen/charts.rb to set streaming for
large series.