fix(sessions): keep previews complete across short file reads#108941
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Behavioral coverage forces permitted short positional reads at both position zero and tail offsets, covering sync/async titles, usage, previews, and custom reset-archive selection. |
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Related: #108655
What Problem This Solves
Fixes an issue where users could see incomplete session titles, usage summaries, preview rows, or reset-archive history when a filesystem returned a permitted short positional read.
Why This Change Was Made
All bounded positional session reads now use the existing fill-until-EOF helpers. This covers synchronous and asynchronous title heads, usage and preview tails, and custom reset-archive header matching without raising any materialization caps.
User Impact
Session lists and history previews remain complete on filesystems that return less data than requested, including network-backed filesystems.
Evidence
node scripts/run-vitest.mjs src/gateway/session-utils.fs.test.ts— 69 tests passed.node scripts/check-changed.mjs -- src/gateway/session-utils.fs.ts src/gateway/session-transcript-files.fs.ts src/gateway/session-utils.fs.test.ts— formatting, production/test typechecks, lint, and boundary guards passed on Blacksmith Testbox..agents/skills/autoreview/scripts/autoreview --mode branch --base origin/main— clean, no accepted/actionable findings.AI-assisted. I reviewed the full changed paths, callers, sibling positional-read surfaces, tests, and Node's short-read contract.