When a folder is created under <project>/staging/ whose name parses as a
ZDDC transmittal folder (YYYY-MM-DD_<tracking> (<status>) - <title>) and
whose tracking number contains -TRN- or -SUB-, also create the same-
named folder under <project>/working/ as a drafting space for staff.
The mirror is one-way and one-shot: created at staging-mkdir time only.
Renames and deletions of either side are not propagated. The
transmittal client orchestrates cleanup at issue time (move files to
archive/<recipient>/issued/, then delete both staging and working
siblings) — the server stays out of that decision.
-MDL- tracking deliberately skips the mirror; MDL deliverables live in
archive/<party>/mdl/ rows, not via the working↔staging pairing.
Implementation: mirrorStagingToWorking() in fileapi.go, called after a
successful serveFileMkdir. EnsureCanonicalAncestors handles working/'s
own auto-own .zddc; the mirror folder gets its own creator-grant on top.
Six new tests cover -TRN-/-SUB- mirror, -MDL- skip, non-transmittal
name skip, deep-path skip, and idempotency over a pre-existing sibling.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
ZDDC
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