v0.6.4

SagerNet/sing-boxv0.6.4Jul 5, 2026by github-actions[bot]

AI Summary

Focuses on sandbox runtime enhancements, introducing live resizing capabilities and improving network handling for fragmented traffic and PMTU relay.

Key Highlights

Live modify and resize for running sandboxes
Improved handling of fragmented UDP and PMTU relay traffic
CLI enhancements including watch/follow modes and resource allocation display
Runtime improvements for shutdown flush timeouts

New Features

Live sandbox resizing
Watch and follow modes for CLI
Resource allocation display
Fragmented UDP handling
PMTU relay support

Full Release Notes

## What's Changed
* chore(deps): Bump cmov from 0.5.3 to 0.5.4 in the cargo group across 1 directory by @dependabot[bot] in https://github.com/superradcompany/microsandbox/pull/1096
* chore: refresh npm lockfile after v0.6.3 by @github-actions[bot] in https://github.com/superradcompany/microsandbox/pull/1098
* fix(network): handle fragmented UDP and PMTU relay traffic by @appcypher in https://github.com/superradcompany/microsandbox/pull/1086
* fix(sdk): accept ephemeral cleanup during stop waits by @appcypher in https://github.com/superradcompany/microsandbox/pull/1087
* fix(runtime): allow overriding shutdown flush timeout by @appcypher in https://github.com/superradcompany/microsandbox/pull/1088
* feat(sandbox): live modify and resize for running sandboxes by @appcypher in https://github.com/superradcompany/microsandbox/pull/1099
* fix(agentd): kill the exec process group, not just the direct child by @appcypher in https://github.com/superradcompany/microsandbox/pull/1104
* feat(cli): show sandbox state in msb metrics and add watch/follow modes by @appcypher in https://github.com/superradcompany/microsandbox/pull/1106
* feat(cli): show resource allocations in msb ps by @appcypher in https://github.com/superradcompany/microsandbox/pull/1107
* refactor(network): tidy scoped upstream tls internals and docs by @toksdotdev in https://github.com/superradcompany/microsandbox/pull/1108
* build(deps): bump msb_krun crates to 0.1.22 by @appcypher in https://github.com/superradcompany/microsandbox/pull/1114
* chore(release): bump microsandbox to 0.6.4 by @appcypher in https://github.com/superradcompany/microsandbox/pull/1102


**Full Changelog**: https://github.com/superradcompany/microsandbox/compare/v0.6.3...v0.6.4