A cron job's promptFilePath is user-supplied via the API and was read with an
unconfined readFile of any absolute path, so a hostile job config could exfil
arbitrary host files (e.g. /etc/passwd, SSH keys) into a Claude session.
Guard the read in resolvePrompt by mirroring the attachment-serving guard
(resolveServableAttachmentPath in file-routes): realpath-resolve the path, then
reject via the shared blocklist (/etc, /root, secret locations) plus the
optional workspace-confinement toggle before reading.
Regression tests in cron-service.test.ts: blocks /etc/passwd (the live repro)
and /root/*, fails cleanly on a missing file, and still allows an ordinary
prompt file outside the blocklist.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PmvZR12aX2v8K7YhqxPUAU
Rename the recurring-jobs feature scheduler->cron to disambiguate from the
legacy ScheduledRun system (/api/scheduled), which is left untouched:
- ScheduledJob->CronJob, SchedulerService->CronService
- /api/scheduler/jobs -> /api/cron/jobs; SSE scheduler:* -> cron:*
- state keys cronJobs/cronJobRuns
- files moved to src/cron/, cron-routes.ts, cron-port.ts, types/cron.ts
- frontend cron-ui.js, #cronModal, menu "Cron"
- docs moved to docs/cron-discovery.md + docs/cron-build-brief.md, README guides
- new tests: cron-service.test.ts, cron-time.test.ts
Green: tsc, lint, frontend-syntax, format, 30 cron + 9 legacy scheduled-runs tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PmvZR12aX2v8K7YhqxPUAU
