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wire 2026-05-06
stories 103
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$ the-wire · showcase

V8 SANDBOXING GOES LIVE IN SOURCE BUILDS

By RepoJournal · Filed · About OpenAI · Composed from the cited sources · methodology

fcoury-oai rhan-oai
2 people shipped this
fcoury-oai @fcoury-oai 1 cited rhan-oai @rhan-oai 1 cited

Codex ships the first phase of in-process V8 sandboxing, hardening the JavaScript execution layer while two critical startup bugs get fixed.

The V8 sandboxing rollout [1] lands build system and Rust feature plumbing to run V8 in a hardened sandbox for source-built Bazel paths, deliberately keeping published rusty_v8 artifacts on their current non-sandboxed contract so this ships independently before changing any released artifacts. Two blocking sandbox issues got resolved overnight: a startup probe on NFS/autofs hosts that was stalling Codex launch [2] now times out gracefully instead of blocking initialization, and bubblewrap build failures [3] no longer panic but propagate as ordinary sandbox failures with proper symlink carveout handling. On the app-server side, /diff commands now route through the workspace abstraction [4] so remote sessions compute diffs against the correct machine, and Turn payloads added an itemsView enum [5] to disambiguate unloaded, summary, and fully hydrated turn states — unblocking future lazy-loading work. This is a coordinated hardening sprint across the execution sandbox, startup paths, and remote workspace semantics.

Action items

References

  1. [1] Enable V8 sandboxing for source-built builds (#21146) openai/codex ↗
  2. [2] fix(sandboxing): Bound advisory system bwrap startup probe (#20111) openai/codex ↗
  3. [3] fix(linux-sandbox): avoid panic on bwrap build failures (#21127) openai/codex ↗
  4. [4] feat(tui): route /diff through workspace commands ↗ openai/codex
  5. [5] add turn items view to app-server turns ↗ openai/codex

$ ls openai/reviews/ # the step-back reads

the week in review Codex hands model defaults to the server the month in review Agents API lands in both OpenAI SDKs
Full archive → Weekly reviews →

Quick answers

What shipped in OpenAI on May 6, 2026?
Codex ships the first phase of in-process V8 sandboxing, hardening the JavaScript execution layer while two critical startup bugs get fixed. In total, 50 commits, 50 pull requests, and 3 releases landed.
Who contributed to OpenAI on May 6, 2026?
2 developers shipped this update, including fcoury-oai and rhan-oai.
What were the notable OpenAI updates?
Enable V8 sandboxing for source-built builds (#21146), fix(sandboxing): Bound advisory system bwrap startup probe (#20111), and fix(linux-sandbox): avoid panic on bwrap build failures (#21127).
♥

$ log OpenAI --recent

Safety identifiers reach images, plugin approvals bind to contents 93 shipped Credential masking lands in Codex, Live gains Decisions across both SDKs 100 shipped Codex stabilizes environment tools, python adds residency options 135 shipped openai-python restores streaming connection reuse, browser and computer toolsets land in both SDKs 123 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl rejects conflicting vLLM engine_kwargs, open-instruct adds MILES OPD behind a Megatron learner Interpretability nnsight 0.8.0 cuts import time from 7.6s to 1.6s

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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