[onurozkir]

What changed

Windows users currently stop at the Bash-only ./install.sh step. Add a native PowerShell installer so they can install, check, and uninstall OpenCode Team with Windows PowerShell 5.1 or PowerShell 7.

• Add install.ps1 with idempotent symbolic links, OpenCode 1.x checks, optional npm bootstrap constrained to 1.x, and OPENCODE_CONFIG_DIR support.
• Preserve existing local/external entries and opencode.json; print the recommended configuration instead of editing it.
• Add native memory compaction and update the orchestrator instructions so Windows gate maintenance does not require Bash.
• Add Windows smoke CI for both PowerShell versions, update installation/contributor docs and both READMEs, and include TESTING-WINDOWS.md.

Why

Provide the native Windows support requested in #42 while preserving the existing macOS/Linux installation behavior and live repository links. Symbolic-link creation requires Administrator PowerShell, or PowerShell 7 with Developer Mode enabled.

Validation

• Native installer smoke tests: 102 assertions passed per shell on Windows PowerShell 5.1 and PowerShell 7.6.5.
• Native memory tests: 38 assertions passed per shell, including relative overrides after Set-Location, Unicode, collisions, and unsafe-path protection.
• Real OpenCode 1.19.4 discovered all 14 team agents, 19 commands, and 13 skills in an isolated environment.
• Actual user installation/check passed; existing configuration remained unchanged.
• Existing Bash install and memory smoke tests passed under elevated Git Bash with native symlinks.
• Manifest validation, generated-reference freshness, and VitePress build passed.
• Provider/model calls and a full pipeline run were not exercised. Remote CI results are separate from these local checks.

Checklist

• ruby scripts/validate.rb passes
• bash -n install.sh scripts/*.sh passes
• ./scripts/smoke-install.sh passes
• New frontmatter description values are quoted when they contain : (no new frontmatter descriptions)
• team.yaml references resolve (agent, skill, profile stage ids)
• README updated if a command, flag, agent or stage changed
• No secrets or machine-specific paths

Related issue

Closes #42

[github-actions]

Thanks for your first pull request. Run ruby scripts/validate.rb and ./scripts/smoke-install.sh before review.

[sametcelikbicak]

Windows CI fix verified: both Windows smoke jobs pass and are now required. Re-approving after force-push.