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/80-info.bats

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+#!/usr/bin/env bats
+
+load 'helpers'
+
+setup() {
+  setup_party_sandbox
+  require_party_group
+}
+teardown() { teardown_party_sandbox; }
+
+party_rec() { printf '%s/party-%s:%s.d/roster\n' "$PARTY_SOCKET_DIR" "$USER" "$1"; }
+
+@test "party who lists invited and attached users" {
+  "$PARTY_BIN" host whotest
+  run "$PARTY_BIN" who --party whotest
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"Party 'whotest'"* ]]
+  [[ "$output" == *"Invited:"* ]]
+  [[ "$output" == *"$USER"* ]]
+  [[ "$output" == *"Attached:"* ]]
+}
+
+@test "party who --short emits a single line for status-right" {
+  "$PARTY_BIN" host shorttest
+  rec=$(party_rec shorttest)
+  sock=$(awk -F= '$1=="SOCKET"{print $2}' "$rec")
+  out=$("$PARTY_BIN" who --short --socket "$sock")
+  case "$out" in
+    party:*) ;;
+    *) echo "got: $out"; false ;;
+  esac
+}
+
+@test "party who --socket prints Party line (long form)" {
+  "$PARTY_BIN" host wstest
+  rec=$(party_rec wstest)
+  sock=$(awk -F= '$1=="SOCKET"{print $2}' "$rec")
+  run "$PARTY_BIN" who --socket "$sock"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"Party 'wstest'"* ]]
+  [[ "$output" == *"host: $USER"* ]]
+}
+
+@test "party who --socket survives a missing roster (set -u regression)" {
+  "$PARTY_BIN" host wsroster
+  rec=$(party_rec wsroster)
+  sock=$(awk -F= '$1=="SOCKET"{print $2}' "$rec")
+  rm -f "$rec"
+  run "$PARTY_BIN" who --socket "$sock"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"Party 'wsroster'"* ]]
+  [[ "$output" == *"host: $USER"* ]]
+}
+
+@test "party who --socket rejects a path that is not a party socket" {
+  run "$PARTY_BIN" who --socket /tmp/not-a-party-socket
+  [ "$status" -eq 2 ]
+  [[ "$output" == *"is not a party socket"* ]]
+}
+
+@test "party status reports hosting" {
+  "$PARTY_BIN" host stat
+  run "$PARTY_BIN" status
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"hosting"* ]]
+  [[ "$output" == *"stat"* ]]
+}
+
+@test "party status reports nothing when not in or hosting any party" {
+  run "$PARTY_BIN" status
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"not in any party"* ]]
+}