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>
Builds on the COD-37 registry: surfaces detected/registered attachments as
dismissible cards with a first-page thumbnail and an inline preview — the
consumer the registry PR deliberately deferred.
Backend:
- document-thumbnailer: first-page PNG thumbnails (PNG passthrough; PDF via
pdftoppm; Office via the preview cache).
- document-preview-cache: disk-cached DOCX/PPTX -> PDF conversion (LibreOffice
/ PowerShell COM), in-flight dedup, multi-converter fallback.
- file-routes: serveConvertedPreview / serveThumbnail + four routes —
GET .../attachments/:id/preview, .../thumbnail and the workspace-path
file-preview / file-thumbnail. Reuses the registry's TOCTOU-safe
resolveServableAttachmentPath, so previews stream the freshly-resolved path.
- server: enrich detected attachment events with a thumbnail route.
- image-watcher: .png now routes to attachment:detected — this PR adds the card
consumer, so the screenshot popup is no longer its only handler.
Frontend:
- panels-ui: attachment cards (addAttachmentCard, lazy stack, Clear-all,
per-session cleanup) plus a 3-arg openFilePreview that renders registered
attachments inline (image/PDF) or via the server-converted PDF (docx/pptx).
- app.js: wire attachment:detected -> _onAttachmentDetected and card state.
- styles: attachment-card + stack styling.
Verified: tsc / eslint / prettier / frontend-syntax clean; new thumbnailer +
preview-cache unit tests pass; full test:ci green (2861 passed); card render +
preview overlay + dismiss verified in-browser.
Claude (Codeman maintainer)