Initial pre-release

tmux-party: share a tmux session with people on the same UNIX host.
Single-file POSIX shell (party) with a filesystem + tmux server-access
trust model. See README.md.

tests/99-e2e.bats

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+#!/usr/bin/env bats
+
+load 'helpers'
+
+setup() {
+  setup_party_sandbox
+  require_party_group
+}
+teardown() { teardown_party_sandbox; }
+
+@test "full lifecycle: host → invite → voice → mute → kick → close" {
+  other=$(pick_other_user)
+  [ -n "$other" ] || skip "no second user on this box"
+
+  "$PARTY_BIN" host e2e
+
+  # discover
+  run "$PARTY_BIN" list
+  [[ "$output" == *"e2e"* ]]
+
+  # invite
+  "$PARTY_BIN" invite "$other" -r
+  rec="$PARTY_SOCKET_DIR/party-$USER:e2e.d/roster"
+  sock=$(awk -F= '$1=="SOCKET"{print $2}' "$rec")
+  tmux -S "$sock" server-access -l | grep -q "^$other"
+
+  # voice → mute
+  "$PARTY_BIN" voice "$other"
+  "$PARTY_BIN" mute "$other"
+
+  # kick
+  "$PARTY_BIN" kick "$other"
+
+  # close
+  "$PARTY_BIN" close e2e
+  [ ! -f "$rec" ]
+  [ ! -S "$sock" ]
+}
+
+@test "all subcommands appear in --help" {
+  run "$PARTY_BIN" --help
+  for sub in host close join leave invite voice mute kick detach role list who status; do
+    [[ "$output" == *"$sub"* ]] || { echo "missing in --help: $sub"; false; }
+  done
+}