Snapshot and restore PI_CODING_AGENT_DIR, OMP_PROFILE, PI_PROFILE, and
XDG_CACHE_HOME instead of relying on setAgentDir(originalAgentDir), which
cannot restore previously-unset or profile-derived env state. Reset the
profile snapshot and rebuild dirs from env in cleanup to prevent
suite-order pollution.
Also reject empty cached content in parseCacheEntry() to harden the
cache contract against corrupted/empty entries.
- Add random UUID suffix to cache temp filenames to avoid same-pid/same-ms collisions
- Export pruneMarkitConversionCache and cover orphaned .tmp sweeping with a regression test
Repeated reads of unchanged PDFs, Office documents, and EPUBs re-ran the
full markit conversion every time. Add a transparent, content-addressed
cache for successful conversions keyed by SHA-256(content) + normalized
extension, so repeat reads reuse converted markdown instead of
reconverting.
- packages/utils: XDG-aware getDocumentConversionCacheDir() helper
- coding-agent: markit-cache module (bounded 256 MiB, oldest-first prune,
best-effort writes that never fail conversion) layered over the central
convertFileWithMarkit/convertBufferWithMarkit wrappers
- imageDir conversions stay uncached (cache:"skipped") to preserve PDF
image extraction side effects; failed/empty/aborted conversions are
never cached
- abort-safe: file byte reads run under untilAborted; cache I/O rechecks
the signal
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