## Summary
The Python SDK's `strip_ansi_escape_codes` (used to clean template build
log messages) still used the old ansi-regex pattern, while the JS SDK's
`stripAnsi` was rewritten in #895. This ports the current JS regex to
Python so both SDKs clean logs identically: OSC sequences (hyperlinks,
window titles) are matched non-greedily up to the first string
terminator — including content spanning newlines — and CSI sequences are
stripped without requiring a terminator.
Following review feedback, both implementations now also strip the
remaining ECMA-48 string controls — DCS (Sixel, tmux passthrough), SOS,
PM, and APC — through their string terminator, so control payloads don't
leak into cleaned logs. This goes beyond upstream `chalk/ansi-regex`,
click, and Rich, none of which fully strip DCS payloads, and restores
what the old Python pattern handled.
Also mirrors the Python test suite into the JS SDK (which previously had
no `stripAnsi` tests) — 20 identical cases per side — and verified
byte-for-byte identical output between the two implementations on all of
them. Includes a patch changeset for `e2b` and `@e2b/python-sdk`.
## Example
Log messages that previously leaked OSC or DCS sequences into template
build output are now cleaned:
```python
from e2b.template.utils import strip_ansi_escape_codes
strip_ansi_escape_codes("\x1b]8;;https://e2b.dev\x07E2B\x1b]8;;\x07") # "E2B"
strip_ansi_escape_codes("\x1b]0;title\nstill title\x07done") # "done"
strip_ansi_escape_codes("\x1b[38:2::255:0:0mRED\x1b[0m") # "RED"
strip_ansi_escape_codes("\x1bPq#0;2;0;0;0~~@@\x1b\\image") # "image" (Sixel DCS)
```
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Mish Ushakov
88f41f3927