[Upstream PR #101] Improve Linux stdin detection for nested wrapper process trees

[quangdang46]

Mirrored from upstream 1jehuang/jcode — Pull Request #101 by @jrish11
Original state: open
Created: 2026-05-02T18:05:22Z · Updated: 2026-05-02T18:07:31Z
Diff: https://github.com/1jehuang/jcode/pull/101.diff
This issue is an auto-mirrored copy. Comments and edits here are local to quangdang46/jcode — do not expect them to propagate upstream.

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Summary

• make Linux stdin detection traverse full descendant process tree, not only direct children
• keep existing stdin-pipe matching guard to avoid false positives
• add regression test for nested wrappers ()

Why

Wrapper chains are common in agent/tool launch flows. The previous direct-child-only scan could miss the actual stdin reader when it lived at grandchild depth.

Notes

• This is a targeted Linux reliability improvement.
• I could not run local Rust tests in this environment because is unavailable here.

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