The hashline multi-section path in `executeHashlineSingle` returned
`perFileResults: rendered.map(r => r.perFileResult)` directly. Each
per-section result had already been individually pruned by
`renderSection`, but the whole array bypassed the shared aggregate
budget added in 3987969 — a single hashline payload touching many files
with sub-32 KB snapshots each could still serialize unbounded snapshot
bytes into one session JSONL line.
Wrap the multi-section return in `pruneOversizedEditSnapshots`, which
delegates to `capPerFileSnapshots` and enforces the shared cap walking
left-to-right; early sections keep their ACP diff visualization, later
sections in a many-file batch degrade to text-only.
End-to-end regression test seeds five real on-disk files (~10 KB
combined snapshots each), runs a multi-section hashline SWAP via
`executeHashlineSingle`, and asserts the aggregate result holds the
cumulative kept snapshot bytes under `MAX_EDIT_SNAPSHOT_TEXT_CHARS`
with at least one section pruned.
roboomp
c21cb6325a