Follow-up hardening applied during review of PR #120, addressing the
adversarial multi-agent findings:
- fix(preview): render auto-detected (workspace, unregistered) DOCX/PPTX via
the file-preview route and PDFs via file-raw in openFilePreview. Previously
the Preview button fell through to file-content, dumping the binary Office/PDF
bytes as mojibake, and the new file-preview route was unreachable dead code.
(MAJOR: file-preview-route-unreachable-detected-office)
- perf(convert): add a global converter-concurrency limiter
(document-conversion-limiter.ts) wrapping every pdftoppm / soffice /
powershell spawn, so N simultaneous preview/thumbnail requests can no longer
fork unbounded converter processes. Default cap 3, CODEMAN_MAX_DOCUMENT_CONVERSIONS.
(MAJOR: no-converter-concurrency-limit)
- fix(cache): bound the converted-PDF disk cache with LRU-by-mtime eviction
(pruneDocumentPreviewCache, default 100 files, CODEMAN_MAX_PREVIEW_CACHE_FILES),
run after each successful conversion. Was unbounded.
(MAJOR/MINOR: preview-cache-unbounded-disk-growth)
Tests: document-conversion-limiter.test.ts, document-preview-cache-eviction.test.ts,
and route coverage for the four new endpoints in
routes/file-routes-preview-thumbnail.test.ts (closes the missing-route-test gap).
Verified end-to-end against real pdftoppm (thumbnail render + concurrency cap).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
