feat(plugin): unify KiloCode/OpenCode plugin exports and routing

[mikij]

• Rename factory to createContextModePlugin and add default { server } export for KiloCode
• Update routing call to pass platform string instead of hardcoded "opencode"
• Add compatibility named export ContextModePlugin for OpenCode consumers
• Adjust tests to verify both default and named exports

BREAKING CHANGE: Plugin consumers using default export must switch from ContextModePlugin(ctx) to { server } shape; named export remains for backward compat.

What / Why / How

Could not get any saving on context

Affected platforms

• Claude Code
• Cursor
• VS Code Copilot (GitHub Copilot)
• Gemini CLI
• OpenCode
• KiloCode
• Codex CLI
• OpenClaw (Pi Agent)
• Kiro
• Antigravity
• Zed
• All platforms

Test plan

added test for "default export has KiloCode PluginModule shape { server }" and renamed old one

Checklist

• Tests added/updated (TDD: red → green)
• npm test passes
• npm run typecheck passes
• Docs updated if needed (README, platform-support.md)
• No Windows path regressions (forward slashes only)
• Targets next branch (unless hotfix)

Cross-platform notes

Our CI runs on Ubuntu, macOS, and Windows.

• If touching file paths, verify forward-slash normalization on Windows
• If touching hook paths, verify no backslash separators
• Use path.join() / path.resolve(), never hardcode / separators
• Use event-based stdin reading — readFileSync(0) breaks on Windows
• Use os.tmpdir(), never hardcode /tmp

[mksglu]

Hi @mikij! Thanks! Why we need that?

[mikij]

Honestly I asked model to investigate what is wrong with plugin as it does not work for me as I can notice. It found this and now I am trying to figure out if that will help. I managed to work with your example prompt but still in daily use I don't see prompts go through context-mode for me. It could be that KiloCode made. some changes in plugin architecture that is little different than OpenCodes but not sure. If you have any other suggestion to try instead I am open to try.

[mikij]

And after I did that in my local installation I start seeing report that says there are savings again. Before even I see tool is called ctx stats says nothing has been processed

[mksglu]

Thanks @mikij — resolved the bundle conflicts and merged to next. Typecheck clean.

We'd appreciate it if you could test the KiloCode/OpenCode plugin routing once we cut the next release. We'll tag you when it's out.