The dashboard's launch path crashed inside tmux but worked
outside it. Root cause: `python -m
claude_bottle.backend.smolmachines.pty_resize` needs the
`claude_bottle` package on `sys.path`, which by default comes
from cwd. The outside-tmux path is `subprocess.run(...)` —
inherits the dashboard process's cwd (the repo root, where
`claude_bottle/` lives), so the import resolves. The
inside-tmux path is `tmux split-window / respawn-pane <argv>`,
and tmux opens the new pane with the pane's OWN cwd, not the
cwd of the process invoking split-window. If the operator
started their tmux pane anywhere outside the repo (typical:
`$HOME`), the wrapper hit `ModuleNotFoundError: No module
named 'claude_bottle'` and tmux closed the pane immediately.
Sidestep the cwd dependence by invoking the wrapper as
`python <absolute-path-to-pty_resize.py>` instead of
`python -m <dotted-path>`. The wrapper has no
`claude_bottle.*` imports — it's stdlib-only — so it runs as
a standalone script anywhere on the filesystem. The absolute
path comes from `pty_resize.__file__` at module-load time.
Tests:
- `test_pty_resize_wrapper_prefix`: updated to assert the
absolute-script-path shape rather than the `-m <dotted>`
shape.
- `test_no_wrapper_when_tty_false`: the substring check now
uses `any("pty_resize" in a for a in argv)` instead of
string-joining (so the absolute path's "pty_resize.py"
filename match still catches a regression).
636 unit tests pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
didericis-claude
794e8666e1