fix lint error

[vearne]

fix lint error
add badge

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 3ce3932f-9e27-475f-9654-f5738b54e822

📥 Commits

Reviewing files that changed from the base of the PR and between deb2416 and 7af1cfd.

📒 Files selected for processing (39)

• .github/workflows/golang-ci.yml
• .golangci.yml
• README.md
• README_zh.md
• examples/a2a_agent/main.go
• examples/agent_skill/main.go
• examples/memory_demo/main.go
• examples/model_config/main.go
• examples/session_persistence/main.go
• examples/simple/main.go
• examples/streaming/main.go
• examples/studio/main.go
• examples/werewolves/game.go
• pkg/a2a/a2a.go
• pkg/a2a/a2a_test.go
• pkg/agent/deep.go
• pkg/agent/deep_test.go
• pkg/agent/react.go
• pkg/agent/react_test.go
• pkg/agent/user.go
• pkg/formatter/anthropic.go
• pkg/formatter/gemini.go
• pkg/memory/inmemory.go
• pkg/memory/inmemory_test.go
• pkg/memory/sql.go
• pkg/model/anthropic.go
• pkg/model/gemini.go
• pkg/model/openai.go
• pkg/studio/client.go
• pkg/studio/client_test.go
• pkg/studio/hooks_test.go
• pkg/studio/studio_test.go
• pkg/tool/coding_ops.go
• pkg/tool/coding_ops_test.go
• pkg/tool/file_ops.go
• pkg/tool/file_ops_test.go
• pkg/tool/skill.go
• pkg/tool/skill_test.go
• pkg/tool/toolkit_test.go

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🧪 Generate unit tests (beta)

• Create PR with unit tests
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