agent-arena v0.1.1

Changes

• Clarifies that Codex should discover Claude Code through the external claude CLI before falling back to same-model subagents.
• Adds context-minimization-without-blindness guidance: external agents may read relevant source/docs/tests within the approved repo scope.
• Adds multi-round cross-critique requirements for non-trivial arenas instead of one-shot heterogeneous review.
• Adds collaborative_design mode so Codex and Claude Code can co-design architectures, interfaces, experiments, and implementation plans instead of only acting as reviewer/checker.
• Documents sensitive-scope exclusions for secrets, datasets, generated results, private logs, and unrelated directories.