* feat(cli): save check, snapshot and render artifacts per revision
* fix(cli): keep clean --snapshots inside the project
A symlinked .hyperframes or artifacts folder was followed, so the command
deleted snapshot and check files outside the project.
* test(cli): keep check, snapshot, and render successful when recording fails
A held history or a corrupt output registry warns and leaves the command result alone.
* fix(cli): drop snapshot records when a replaced run is not recorded
A reused --output rewrites the files even when history is busy.
Those records are removed so the old revision does not keep the new pixels.
The preview checkpoint stops waiting after five seconds.
A bad PNG header no longer fails the snapshot.
* fix(studio-server): keep the video-state comment share from rising
The forget helper's doc comment pushed the file above its base share.
* fix(cli): post the preview checkpoint and keep cleanup inside artifacts
A preview checkpoint with no body was sent as GET, so Studio never ran it.
Cleanup now requires the real path to stay under the artifacts folder.
A failed follow-up drop does not warn twice.
The studio-server unpacked budget covers the record-dropping helper.
* docs(cli): shorten the snapshot skill notes
The command examples already show range and composition.
The prose only keeps the output path and the flags that are easy to misuse.
* chore: leave package headroom for artifact cleanup
* test(cli): compare artifact paths portably
* style(cli): format portable artifact assertion
* feat(cli): HF_TOOL_CONTEXT artifact events and project lock for agent harnesses
* fix(cli): serialize stale project lock takeover
Use a short-lived break lock so only one waiter can remove a dead
holder's lock. Cover the contention path with six real processes.
* fix(cli): hold snapshot lock through finalization
Keep the project lock while contact sheets, artifact events, and frame
descriptions read captured files so another snapshot cannot replace them.
* fix(cli): recover a project lock after the breaker crashes
A killed takeover left project.lock.break in place, so later commands
waited out the timeout even though both holders were dead. Reclaim that
file only when its recorded process is dead, and compare artifact paths
after the platform resolves them.
* fix(cli): accept a killed breaker process with no signal name
Windows ends the process without reporting SIGKILL, so the regression
was failing before it checked that the leftover breaker can be reclaimed.
* fix(cli): leave a killed project-lock breaker in place
Reclaiming a dead breaker unlinks a name another process may just have
created, so two commands can hold the lock. The timeout names that file
and its pid and says to delete it to continue.
Xuanru Li