Accord v3.4.0

Fixed

• Critical: messages could no longer be exchanged at all (regression
  introduced in 3.0.0). The transport installed initiator-side sessions inside
  a debug_assert! — whose argument is not evaluated in release builds —
  so the shipped app silently discarded every session it initiated. Both peers
  on 3.x could complete handshakes forever without ever being able to talk
  (infinite reconnection churn, every outgoing send failing). Debug-profile
  tests were all green, which is why CI never caught it. If you and your
  friends saw messages stop after updating to 3.x: this was it — update both
  sides to 3.4.0.
• Update notes are now rendered (headings, bold, lists, code) in
  Settings → Updates instead of showing raw Markdown markup.

Added

• Support log file: set the ACCORD_LOG_FILE environment variable to
  capture the app's journal to a file (a GUI app's stdout is lost), plus
  precise transport diagnostics: every failed send now logs its reason, and
  every established session logs its role, address and tunnel flag.

CI

• Release-profile transport tests: the hermetic SimNet end-to-end suites
  now also run compiled in release mode — code behavior can diverge between
  profiles (debug_assert! is compiled out), which is exactly how the 3.0.0
  regression escaped. This step alone would have blocked it (9/11 tests fail
  with the bug present).
• clippy::debug_assert_with_mut_call enforced: any state-mutating call
  inside a debug_assert!/debug_assert_eq! is now a hard CI failure.

Changed

• mdns-sd 0.20.1 → 0.20.2 (LAN discovery; note: a malformed mDNS
  announcement from another device can still crash the discovery thread
  upstream — tracked separately, does not affect remote friends).

Install notes (macOS "damaged" warning, Windows SmartScreen)

macOS — the app is not damaged: it is not notarized by Apple (that requires a paid developer certificate), and macOS reports quarantined, non-notarized apps as "damaged" on Apple Silicon. Fix it once, after dragging Accord into Applications:

xattr -cr /Applications/Accord.app

Windows — the installer is not code-signed: click More info → Run anyway.