v1.20.1

Fixed

• opencode-delegate spawns outside git repositories: dropped the isolation: worktree
  frontmatter flag — Claude Code requires a git repo to create agent worktrees, so spawning
  the subagent in a non-repo cwd (e.g. $HOME) failed with "Cannot create agent worktree".
  The subagent now runs in the caller's working directory like any standard subagent; the
  OpenCode MCP tools already take an explicit absolute cwd, so no isolation is needed at
  the supervisor layer. Agent prompt now instructs it to pass cwd on every tool call and
  scope tasks with explicit in/out-of-scope paths instead of relying on worktree isolation.
• opencode-routing skill updated to match: blast-radius scoping happens in the task text,
  not via worktree isolation.