test(cli): validate PTY across release targets

[marius-kilocode]

PTY support for Agent Manager is exercised differently from the regular CLI test suite. The previous live PTY tests skipped Windows, and release validation only started the compiled binaries, so native failures in ConPTY or musl targets could pass validation and surface after distribution.

This change adds portable coverage for both PTY API paths used by Agent Manager: regular terminal tabs and Run/setup terminals. Release validation now runs a release-only probe against every packaged CLI architecture and libc target before VSIX packaging. The probe covers shell startup, terminal I/O, resize, exit status, and cleanup.

Process-tree cleanup also reads Linux /proc directly when available, avoiding a dependency on ps in minimal musl environments. Windows cleanup avoids the Unix-only process-tree verifier after taskkill completes.

The Agent Manager terminal destination default is unchanged. This PR adds cross-platform validation and platform cleanup hardening only.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/core/src/kilocode/pty/termination.ts

Previous Review Summaries (2 snapshots, latest commit 05cbbdd)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 05cbbdd)

Status: 1 Issue Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	1
SUGGESTION	0

Issue Details (click to expand)

WARNING

File	Line	Issue
packages/core/src/kilocode/pty/termination.ts	135	/proc scan fails closed on a single vanished PID

Files Reviewed (3 files)

• packages/core/src/kilocode/pty/smoke.ts - 0 issues
• packages/core/src/kilocode/pty/termination.ts - 1 issue
• packages/core/test/kilocode/pty-platform.test.ts - 0 issues

Fix these issues in Kilo Cloud

Previous review (commit 8d0750f)

Status: 4 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	3
SUGGESTION	1

Issue Details (click to expand)

WARNING

File	Line	Issue
packages/core/src/kilocode/pty/smoke.ts	20	Ready check can pass on echoed input before the shell runs
packages/core/src/kilocode/pty/smoke.ts	64	Cleanup probe will fail Alpine/musl release validation (ps -axo vs BusyBox)
packages/core/test/kilocode/pty-platform.test.ts	75	Exact taskkill exit code 128 is a brittle liveness check

SUGGESTION

File	Line	Issue
.github/workflows/test.yml	192	Dedicated PTY steps do not isolate these tests from the sharded suites

Files Reviewed (9 files)

• .github/workflows/publish.yml - 0 issues
• .github/workflows/test.yml - 1 issue
• packages/core/src/kilocode/pty/smoke.ts - 2 issues
• packages/core/src/kilocode/pty/termination.ts - 0 issues
• packages/core/test/kilocode/pty-platform.test.ts - 1 issue
• packages/opencode/src/kilocode/cli/cmd/pty-smoke.ts - 0 issues
• packages/opencode/src/kilocode/cli/setup.ts - 0 issues
• packages/opencode/test/server/httpapi-pty.test.ts - 0 issues
• packages/opencode/test/server/httpapi-v2-pty.test.ts - 0 issues

Fix these issues in Kilo Cloud

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_{Reviewed by grok-4.6 · Input: 70.7K · Output: 5.2K · Cached: 161.5K}

_{Review guidance: REVIEW.md from base branch main}