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fix(worker): hold one fd per level of depth in list_files - #41
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- sandbox: bound the wait on a stuck exec stream after a timeout kill - workspace: cap the nested .git scan and fail closed over the cap - models: truncation marker names the cap actually applied - tools, phi: SandboxError is one failed step / an inconclusive phi
_find_name kept every directory it found open until the scan ended, so a checkout with about a thousand directories ran out of descriptors under the usual 1024 soft limit. With the fail-closed handling in this PR, every git step on such a checkout (diff, changed paths, the Phi path check) was then refused. The scan now keeps only the directories on the current path open.
OfficialAbhinavSingh
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Nov 2, 2026
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merged with main locally, full suite green (365 passed), ruff and pyright clean.
_walk now closes finished frames exactly like _find_name does, so descriptors grow with depth not directory count. the early return on _MAX_LIST_ENTRIES still gets everything closed, since the finally walks whatever is left in frames. the two new tests (low RLIMIT_NOFILE, and the open-fd count before/after) would both fail without the fix.
the receipt-v0.md wording is also correctly carried over from the 39 base.
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Follow-up to #39 review nits.
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