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Measure Anthropic's sandbox runtime (srt) on macOS - #46
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Adds srt 0.0.81 to macos-measure.yml in four configurations: no settings, allowWrite ["."], the same with denyWrite naming Claude Code's project settings files, and denyRead ["~/"]. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Four configurations of srt 0.0.81 on a GitHub-hosted macOS machine. With allowWrite ["."] Claude Code's project settings files are writable, as the runtime's documented deny list implies, and denyWrite protects them. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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srt0.0.81 tomacos-measure.ymland records four configurations on a GitHub-hosted macOS machine with probe 0.7.0.srtsettingsallowWrite ["."].claude/settings.json,.claude/settings.local.json,.codex/config.toml,.agentsallowWrite ["."]withdenyWritenaming the two Claude Code files.codex/config.toml,.agentsdenyRead ["~/"],allowRead ["."],allowWrite ["."]allowWrite ["."], with~/.gitconfigunreadableThe network was contained in every run, and
.mcp.jsonand.git/hooksrefused writes.docs/MEASUREMENTS.mdrecords this as documented behavior:srtblocks a fixed list of names inside an allowed write path as defense in depth, Claude Code's settings files are not on it, and the configureddenyWriteis the boundary. Claude Code adds those files to its own policy.Run: https://github.com/binary-knight/agentsec-pack/actions/runs/42345748324
Tested: 419 passed and 13 skipped locally, where some tests skip without network access.
🤖 Generated with Claude Code