fix: scope opencode server workdir to calycode workspace

[MihalyToth20]

Summary

• scope OpenCode server/native-host process execution to ~/.calycode/opencode/workspace instead of inheriting arbitrary launcher directories
• keep direct oc run proxy behavior project-aware by preserving process.cwd() for normal terminal usage
• add a patch changeset for @calycode/cli documenting the working-directory safety improvement

Validation

• pnpm --filter @calycode/cli build
• pnpm --filter @calycode/cli test
• lsp_diagnostics on packages/cli/src/commands/opencode/implementation.ts

Summary by CodeRabbit

Improvements

• OpenCode server and native-host processes now use a dedicated workspace directory for better isolation
• Customize workspace location via the CALY_OPENCODE_WORKDIR environment variable
• Default workspace at ~/.calycode/opencode/workspace
• Project-relative working directory maintained for direct CLI proxy usage

[changeset-bot]

🦋 Changeset detected

Latest commit: dab4103

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@calycode/cli	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: d708cc6c-4084-462d-ab04-1a3d7f5337a1

📥 Commits

Reviewing files that changed from the base of the PR and between 796fa77 and dab4103.

📒 Files selected for processing (2)

• .changeset/small-apes-bake.md
• packages/cli/src/commands/opencode/implementation.ts

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Walkthrough

A patch release updates the OpenCode command implementation to scope child processes to a dedicated CalyCode workspace directory. The changes introduce directory resolution logic with environment variable precedence and mode-dependent fallbacks, updating process spawning across multiple code paths.

Changes

Cohort / File(s)	Summary
Changeset .changeset/small-apes-bake.md	New patch release metadata documenting workspace directory scoping for OpenCode server and native-host child processes.
OpenCode Implementation packages/cli/src/commands/opencode/implementation.ts	Extended getSpawnOptions to accept cwd parameter. Added utility functions (getCalycodeOpencodeWorkspaceDir, ensureDirectoryExists, getOpencodeWorkingDir) implementing precedence-based working directory resolution. Updated proxyOpencode, startNativeHost, and serveOpencode to pass resolved working directory to spawned processes with directory creation side effects.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 Whiskers twitching with delight,
Workspaces now scoped just right,
Child processes find their home,
In CalyCode's garden they roam,
Precedence logic shines so bright! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 62.50% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'fix: scope opencode server workdir to calycode workspace' directly and accurately summarizes the main change: scoping OpenCode server process working directories to a dedicated Calycode workspace directory instead of inheriting arbitrary launcher directories.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/opencode-scoped-workdir

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