fix: Team plugin yard() creates directories in parent directory instead of project-scoped location

[terisuke]

Problem

The yard() function in packages/guardrails/profile/plugins/team.ts:225-227 creates team worktree directories in the parent directory of the project:

function yard(dir: string) {
  return path.join(path.dirname(dir), `.${path.basename(dir)}-opencode-team`)
}

This causes directories like the following to be created at ~/Developer/ level:

• .BenevolentDirector-opencode-team
• .engineer-cafe-navigator2025-opencode-team
• .milaos-realtime-avatar-spec-opencode-team
• .opencode-opencode-team

Each contains UUID-named subdirectories with nested .opencode/ directories.

Expected Behavior

Team worktrees should be stored in a project-scoped location, following the upstream Worktree pattern:

// Upstream worktree pattern (packages/opencode/src/worktree/index.ts:227)
const root = pathSvc.join(Global.Path.data, "worktree", ctx.project.id)
// → ~/.local/share/opencode/worktree/<project-id>/

Proposed Fix

Option A: Store inside project directory

function yard(dir: string) {
  return path.join(dir, ".opencode", "team")
}

Option B: Use central XDG storage (aligned with upstream worktree pattern)

function yard(dir: string) {
  return path.join(Global.Path.data, "team", path.basename(dir))
}

Impact

• User's Developer directory gets cluttered with hidden project-named directories
• Directories are not cleaned up when project is deleted
• Violates the principle that opencode state should be contained within .opencode/ or ~/.local/share/opencode/

Cross-Review Notes

• Upstream worktree/index.ts correctly uses ~/.local/share/opencode/worktree/
• Upstream has no memory/hooks/guardrails (fork-only features)
• Upstream latest: v1.4.3, divergence is 1160 lines in memory/hook directories
• Upstream branches kit/dev-memory-observe and perf/tool-memory may introduce future conflicts

Related

• Part of the 7-layer memory architecture implementation (branch: feat/memory-v2-schema)
• Memory system correctly uses Instance.directory + .opencode/memory/ (not affected)