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docs(research): record Windows descendant-process containment (#258) - #260

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Records the research for Establish how Secant can contain a Harness's descendant processes on Windows in docs/research/windows-process-containment.md. It covers which Git Bash commands escape taskkill /T /F, the fact that a kill-on-close Job Object with no breakaway contains them (created through bun:ffi), the finding that Codex's turn/interrupt leaves a running command alive, and what Claude Code, Codex, OpenCode, and T3 Code do on Windows.

Facts only. The choice belongs to Decide how Secant contains a Harness's descendant processes on Windows.

Merge with a merge commit (not squash or rebase) so the pinned links in the resolution comment survive.

🤖 Generated with Claude Code

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Sandstorm831 merged commit 1e5cb1d into main Sep 29, 2026
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Sandstorm831 deleted the research/258-windows-containment branch September 29, 2026 09:41
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