Audience: creative-ops and platform engineers who run OpenClaw on a remote Mac while designers drop PNGs into Dropbox (or similar) export trees—where “conflicted copy” files appear without anyone noticing. Outcome: a reproducible loop that respects directory watch boundaries, applies explicit conflict detection rules, combines OpenClaw orchestration with local CLI transparency checks, and finishes with classified retries plus JSONL logs you can audit. Pair this runbook with the broader PNG watch, retry, and log archive HowTo so queue semantics stay consistent.
Table of Contents
Directory watch boundaries (cloud roots)
Filesystem watchers on macOS see every rename Dropbox uses while reconciling servers and peers. Treat the resolved Dropbox path as the contract root—commonly ~/Library/CloudStorage/Dropbox—not a stale symlink in ~/Dropbox unless you verify it points at the same inode. Ignore *.tmp, .DS_Store, and files smaller than 64 bytes until PNG magic bytes 89 50 4E 47 validate.
Cloud-specific debounce: raise idle after last write from the usual 45 s local SSD baseline to roughly 60–120 s for Dropbox-heavy folders, and require two consecutive stat polls with identical size and mtime before enqueue—this filters half-uploaded objects that look “closed” to naive watchers. If events burst during large syncs, switch the outer trigger to a slow poll (every 30 s) while keeping OpenClaw single-flight so you never stack duplicate jobs on the same basename.
For launchd hygiene and log rotation so tails do not vanish mid-incident, reuse the checklist in OpenClaw remote Mac merge, launchd, and watch retry—especially splitting errors.jsonl from verbose stdout.
Conflict detection rules
Encode Dropbox’s human-readable conflict markers as case-insensitive substrings, for example conflicted copy and localized variants your team actually sees. A practical matcher also catches bracketed machine names when present. When a conflict path appears, locate the stem candidate: strip the conflict suffix and search the same parent directory for another PNG sharing dimensions in filename or metadata if your naming convention encodes WxH.
Heuristic table you can paste into policy YAML:
| Signal | Threshold | Action |
|---|---|---|
| Byte size delta between stem and conflict | > 5 % relative or > 256 KB absolute (whichever is smaller) | Flag needs_human—do not auto-pick winner |
| Identical WxH, newer mtime on conflict file | mtime newer by ≥ 2 s | Suggest merge_hint: keep_newer with diff summary only |
Alpha channel mismatch (rgba vs rgb) |
any difference in identify -format %[channels] |
Quarantine both; require designer pick |
Never silently delete the non-chosen file—move winners and losers into work/merged_candidates/ with paired JSON sidecars so OpenClaw Skills or humans can approve.
OpenClaw and local script collaboration
Use OpenClaw for orchestration—token scope, model-assisted summaries of JSONL, alerting—while deterministic checks stay in shell or Swift helpers you can unit-test. After enqueue, run identify -verbose path.png (ImageMagick) for geometry, depth, and alpha; add pngcheck -v when installed for chunk-level warnings. Emit one JSON line per file with fields like trace_id, bytes, mtime_epoch, channels, merge_hint, and risk_flags (size_spike, alpha_mismatch, sync_incomplete).
Gateway wiring should follow the same Node and token layout you validated in the OpenClaw install guide so SSH sessions and launchd jobs share one TOKEN_FILE path. Keep GPU-heavy previews optional; conflict triage is I/O-bound and should remain cheap on Apple Silicon headroom.
Failure retry and logging
Classify failures before retrying: transient (ETXTBSY, timeouts, brief Dropbox lock) versus permanent (invalid PNG, policy violation, unpaired conflict). Cap transients at five attempts with exponential backoff starting near 3 s and 10 % jitter; never loop on permanent classes—move files to quarantine/ and require operator promotion.
Logging contract: append UTF-8 JSON lines to ~/png_jobs/<job>/logs/inspection.jsonl; mirror fatal rows to errors.jsonl under 5 MB rotation or daily roll. Correlate with log show predicates for the watcher binary during the same UTC window so you can tell sync storms from code regressions.
HowTo steps (copy-paste parameters)
- Define
WATCH_ROOT: export the resolved Dropbox design folder, e.g.WATCH_ROOT="$HOME/Library/CloudStorage/Dropbox/design_exports". - Set idle gates:
IDLE_SEC=90,STABLE_POLLS=2,POLL_FALLBACK_SEC=30when fswatch noise exceeds sane thresholds. - Conflict glob: treat filenames matching
*conflicted copy*as conflicts; stem basename by regex removing the conflict tail before pairing. - Inspect CLI:
identify -format "%m %[channels] %wx%h %b" file.pngfor quick rows; add verbose only on failures. - OpenClaw task: POST enqueue with
job_id,paths[], andpolicy_revision; Skill returns structuredmerge_hintwithout mutating originals until approval. - Retry knobs:
MAX_RETRY=5,BASE_DELAY_SEC=3,CAP_DELAY_SEC=120for transients only. - Done criteria: every conflict under
WATCH_ROOThas a JSONL row with non-emptymerge_hintor explicitneeds_human.
Summary — why rent or buy a Mac node for this: conflict triage needs always-on paths, stable launchd identities, and room for CLI tools beside OpenClaw—laptop sleep and roaming VPNs break the idle math. MacPng gives you a dedicated remote Mac for exactly that posture: predictable disks, 24/7 automation, and SSH/VNC when you need eyes on quarantine. Public pages stay open without login—start from Tech Insights, the MacPng home overview, then rent or buy a node and check pricing and Help for bring-up.