Give Codex a usable sandbox in the consolidated loop - #96
Merged
Merged
Conversation
Codex defaults to `workspace-write`, which makes it sandbox with bubblewrap.
bwrap cannot create a loopback interface on a GitHub-hosted runner:
bwrap: loopback: Failed RTM_NEWADDR: Operation not permitted
Every shell command then fails before it runs. Codex reported this exactly —
"the workspace shell fails before any command runs ... I therefore can't
inspect the existing availability API, run tests, or create the required
verified commit safely" — and its session recorded 0 commands executed and 0
files changed.
From outside that reads as the agent producing nothing: the job is green, the
ledger closes the task, and the only commit is a telemetry timestamp. Two
evaluation rounds were scored against Codex on this basis before the session
transcript was read.
The runner is an ephemeral single-tenant VM and is already the isolation
boundary, so Codex's inner sandbox buys nothing here. Pass
`danger-full-access` on both Codex paths in the consolidated loop, matching
what the runner already documents for CI use.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC8XoyssN5v6hQCTtcjoB5
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Codex defaults to
workspace-write, which makes it sandbox with bubblewrap. bwrap cannot create a loopback interface on a GitHub-hosted runner:Every shell command then fails before it runs. Codex reported this exactly — "the workspace shell fails before any command runs ... I therefore can't inspect the existing availability API, run tests, or create the required verified commit safely" — and its session recorded 0 commands executed and 0 files changed.
From outside that reads as the agent producing nothing: the job is green, the ledger closes the task, and the only commit is a telemetry timestamp. Two evaluation rounds were scored against Codex on this basis before the session transcript was read.
The runner is an ephemeral single-tenant VM and is already the isolation boundary, so Codex's inner sandbox buys nothing here. Pass
danger-full-accesson both Codex paths in the consolidated loop, matching what the runner already documents for CI use.Claude-Session: https://claude.ai/code/session_01FC8XoyssN5v6hQCTtcjoB5
Workflow Source
Started from:
Automation intent:
Notes:
Summary
Testing