0.12.0 — 2026-06-19 — Video Capture + Per-Action Deadlines

Release Notes

A feature-and-hardening minor. The headline is browser video/screen capture — record
a target or a whole session to WebM through the shim, with a byte/duration cap enforced
shim-side. Alongside it: per-action deadlines honored end-to-end over MCP/RPC (the
daemon kills the in-flight action and returns a typed request_timeout), an opt-in
content-bearing dom_after_hash fingerprint tier for interactions, and a sweep of
capture/network/scroll fixes. Internally, the test suite is now parallel-safe under
cargo-nextest (the --test-threads=1 mandate is retired). All changes preserve the
replay-equal hash chain (NFR-DET-01). (#178–#204)

Added

• Browser video / screen capture (#196). New web.start_recording / web.stop_recording
  surface verbs (plus a whole-session recording mode) stream Page.screencastFrame JPEGs
  through the shim and encode WebM, with a configurable byte/duration cap enforced before
  encode. A kill-switch (LOOM_DISABLE_RECORDING) refuses recording cleanly.
• Per-action deadlines over MCP/RPC (#202). deadline_ms is now honored end-to-end:
  the daemon enforces it server-side, kills the in-flight action when it expires, and
  returns a typed request_timeout instead of hanging the client.
• Content-bearing dom_after_hash for interactions (#197), behind an opt-in
  fingerprint tier, so interaction receipts can carry a content hash of the post-action DOM.
• recreated_count in loom.session.info (#190) — surfaces how many times an
  evicted session was implicitly recreated.
• Configurable per-CDP-command navigate budget via LOOM_SHIM_CDP_TIMEOUT_MS (#187).
• budget arg on loom.session.reset (#185), mirroring session.create.

Fixed

• web.scroll scrolls the document/viewport and records scroll_result (#195).
• Reliable framer-motion reveal capture (#194) — un-wedge the page, honor a screenshot
  deadline, and capture whileInView reveals.
• network_events + HAR populate method/status/sizes (#192); byte sizes stay out of the
  hashed chain under determinism.
• Per-session in-order serialization guard for concurrent dispatch (#193).
• Engine-aware .cwasm staleness (#191) — composite stamp, auto-refresh, doctor flag.
• Graceful SIGTERM shutdown unlinks the daemon socket (#188). SocketServer holds an
  RAII guard that remove_files loom.sock on shutdown (and panic); the startup
  stale-socket reclaim now logs a WARN.
• Structured error context surfaced in TypedReceipt.data over MCP (#184).

Changed

• Parallel-safe test suite via cargo-nextest (#204). The --test-threads=1 mandate is
  retired; the suite runs process-per-test (env/umask/OnceLock/tracing-callsite races fixed).
  cargo nextest run is the canonical runner; plain cargo test also passes at default
  parallelism. No production behavior change.
• Internal refactors with no behavior change: split four oversized files + collapse
  too_many_arguments (#203, #201, #200), CreateSessionParams for create_session_raw,
  hermetic per-test TempDir for loom-core (#198), de-flake the pipelined-hello test (#189),
  delete the dead llm_cache subsystem (#186).

Install loom-cli 0.12.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/mentiora-ai/loom/releases/download/v0.12.0/loom-cli-installer.sh | sh

Install prebuilt binaries via Homebrew

brew install mentiora-ai/loom/loom

Download loom-cli 0.12.0

File	Platform	Checksum
loom-cli-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
loom-cli-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
loom-cli-aarch64-unknown-linux-gnu.tar.xz	ARM64 Linux	checksum
loom-cli-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum