nex-box
Sub-millisecond Copy-on-Write (CoW) ephemeral execution sandbox for autonomous coding agents.
nex-box provides instant, kernel-level Copy-on-Write execution sandboxes for AI agents. It allows autonomous agents (Cursor, Claude Code, Aider, custom hypervisors) to execute builds, test suites, and destructive file mutations in isolated scratch environments backed by APFS clonefile(2) and Linux ioctl(FICLONE) reflinks—guaranteeing sub-5ms instantiation, zero host filesystem pollution, and atomic rollbacks.
Performance Comparison
| Metric | Docker Container | Python Virtualenv / cp -R |
nex-box |
|---|---|---|---|
| Sandbox Cold Boot | 1,500ms – 3,500ms | 120ms – 800ms | 2.1ms (2,168µs) |
| Physical Disk Overhead | Megabytes to Gigabytes | Duplicates full tree | 0 bytes (CoW Metadata) |
| Rollback Cost on Failure | Container teardown | Manual file cleanup | Instant (< 1ms Inode Purge) |
| Diff & Change Audit | git status (Slow) |
Manual diffing | In-Memory BLAKE3 SIMD |
| Host System Safety | Isolated | Leaks file mutations | Hermetic Isolation |
Installation
Via pip (Pre-compiled wheels)
pip install nex-box
# or with uv:
uv pip install nex-box
1 maintainer
Metadata
1 maintainer
Release files for nex-box 0.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| nex_box-0.1.0.tar.gz | 19.0 kB | With provenance | Details for nex_box-0.1.0.tar.gz |
Built distributions (wheels)
| File | Actions Reset | |||
|---|---|---|---|---|
| nex_box-0.1.0-cp312-cp312-manylinux_2_28_x86_64.whl | CPython 3.12 | CPython 3.12 | Linux glibc 2.28+ x86-64 | Details for nex_box-0.1.0-cp312-cp312-manylinux_2_28_x86_64.whl |
| nex_box-0.1.0-cp311-cp311-win_amd64.whl | CPython 3.11 | CPython 3.11 | Windows x86-64 | Details for nex_box-0.1.0-cp311-cp311-win_amd64.whl |
| nex_box-0.1.0-cp311-cp311-macosx_11_0_arm64.whl | CPython 3.11 | CPython 3.11 | macOS 11.0+ ARM64 | Details for nex_box-0.1.0-cp311-cp311-macosx_11_0_arm64.whl |
| nex_box-0.1.0-cp311-cp311-macosx_10_12_x86_64.whl | CPython 3.11 | CPython 3.11 | macOS 10.12+ x86-64 | Details for nex_box-0.1.0-cp311-cp311-macosx_10_12_x86_64.whl |
Total release size: 1.1 MB
Release files / nex_box-0.1.0.tar.gz
| Download URL | nex_box-0.1.0.tar.gz |
|---|---|
| Size | 19.0 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
5ed95d740f3453c59e9beb93da476893160296bd6ede3bdcb36b6260584c201f
|
|
BLAKE2b-256 checksum How to use checksums |
4fc07bd9cd500c6d958eded28a931db1c99205f197861a0f49233d191db9171a
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logRelease files / nex_box-0.1.0-cp312-cp312-manylinux_2_28_x86_64.whl
| Download URL | nex_box-0.1.0-cp312-cp312-manylinux_2_28_x86_64.whl |
|---|---|
| Size | 294.9 kB |
| Tags | CPython 3.12 Linux glibc 2.28+ x86-64 |
|
SHA-256 checksum How to use checksums |
9a1e32056a1ec044d4ae06c431dae6ee3f303fddeeefc8e7c483536c4e9bf4da
|
|
BLAKE2b-256 checksum How to use checksums |
4a47d93b157fe20086ad66acb606ead72a1f85345af300cd3ab891b6aff51812
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logRelease files / nex_box-0.1.0-cp311-cp311-win_amd64.whl
| Download URL | nex_box-0.1.0-cp311-cp311-win_amd64.whl |
|---|---|
| Size | 231.7 kB |
| Tags | CPython 3.11 Windows x86-64 |
|
SHA-256 checksum How to use checksums |
fb1083de8a716c570691722783a2f164cc7a710cee91bec0df59f209326c09e4
|
|
BLAKE2b-256 checksum How to use checksums |
ce1989e379b177f6c1acd1d7c415ed61b0a450064b831c761758f9aa1196fe7f
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logRelease files / nex_box-0.1.0-cp311-cp311-macosx_11_0_arm64.whl
| Download URL | nex_box-0.1.0-cp311-cp311-macosx_11_0_arm64.whl |
|---|---|
| Size | 252.6 kB |
| Tags | CPython 3.11 macOS 11.0+ ARM64 |
|
SHA-256 checksum How to use checksums |
a6233fc0e6efd1f52fc000953abff7ec1b4ca5af4102af67657e319c1988f38f
|
|
BLAKE2b-256 checksum How to use checksums |
593d324c1fbb0646efa62949e49e650d8b91e9c64922794e5df83bbbd9323787
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logRelease files / nex_box-0.1.0-cp311-cp311-macosx_10_12_x86_64.whl
| Download URL | nex_box-0.1.0-cp311-cp311-macosx_10_12_x86_64.whl |
|---|---|
| Size | 278.7 kB |
| Tags | CPython 3.11 macOS 10.12+ x86-64 |
|
SHA-256 checksum How to use checksums |
e1c8e20af5dfc6acfd81d178d3cffc4876e2a499b240bb6115ed6c66756209f2
|
|
BLAKE2b-256 checksum How to use checksums |
b7a1bf252f159dbba4aadae0a9f078c893154ccc52ce06bc6e714d5d2aaccbc2
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logSecurity for nex-box 0.1.0
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 5 files in this release have been uploaded with provenance metadata.
Attestation for nex_box-0.1.0.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logA note on package security
PyPI is a repository for distributing packages, not a service for auditing them. While third-party security researchers and our staff do their best to detect and remove malicious packages, PyPI cannot guarantee the quality, security or suitability of any given package.
To learn more about protecting yourself from malicious actors, visit our package security documentation.
