npm / bun-pty

bun-pty

What changed in bun-pty 0.5, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-28.

5 breaking2 behavior and defaults5 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

bun-pty 0.512 changes

When the child inherits process.env on Unix, the parent's COLUMNS and LINES are dropped.
0.5.0release notes
When provided, env replaces the child's environment instead of being merged with the parent's; spread process.env to inherit variables.
0.5.0release notes
If env has no PATH, bare program names are still found using the parent's PATH, which is not passed to the child.
0.5.0release notes
On Unix, PWD is set from cwd when building the child's environment.
0.5.0release notes
When the child inherits process.env on Unix, the parent's tmux and screen variables are dropped.
0.5.0release notes

Without env, the child receives the current process.env, so changes made at runtime reach it.
0.5.0release notes
The name option is now optional, and env: process.env now type-checks.
0.5.0release notes

Importing bun-pty no longer throws when no native library file is found; the error is deferred to spawn(), while the load failure is still logged at import.
0.5.2release notes
When the native library fails to load, spawn() now throws a clear error containing the library path and dlopen error instead of an undefined-property error.
0.5.2release notes
Test files are no longer included in the npm package, so consumers receive a package without src/*.test.ts files.
0.5.1release notes
On Windows, an empty env map keeps the parent's environment.
0.5.0release notes
On Unix, TERM is set from the name option, then from TERM in the environment, then to xterm.
0.5.0release notes