Agent Skills: tmux-ui-tripwire

Write or debug tmux-driven end-to-end TUI tests ("tripwires") for the ainb terminal app. Use when the user asks to "write a tmux test", "add a tripwire", "verify the TUI in tmux", "test feature X by pressing key Y", "validate plugin Z renders", or when editing any file under `crates/ainb-core/tests/tripwire_*.rs`. Codifies the silent traps we hit during Phase 7 plugin testing — macOS AMFI SIGKILL of staged binaries (exit 137, no stderr), first-run wizard intercepting keystrokes, EnvFilter crate-name drift hiding logs, and substring-OR assertions that pass while the feature is broken. Use proactively before writing any new `tripwire_*.rs` test, and reference whenever an existing tripwire fails for non-obvious reasons.