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Debug LLM applications using the Phoenix CLI. Fetch traces, analyze errors, structure trace review with open coding and axial coding, inspect datasets, review experiments, query annotation configs, and use the GraphQL API. Use whenever the user is analyzing traces or spans, investigating LLM/agent failures, deciding what to do after instrumenting an app, building failure taxonomies, choosing what evals to write, or asking "what's going wrong", "what kinds of mistakes", or "where do I focus" — even without naming a technique.
// install — copy + paste into any project
mkdir -p .claude/skills && curl -fsSL https://raw.githubusercontent.com/github/awesome-copilot/HEAD/plugins/phoenix/skills/phoenix-cli/SKILL.md -o .claude/skills/phoenix-cli.mdDrops the SKILL.md into .claude/skills/phoenix-cli.md. Works with Claude Code, Cursor, and any agent that loads SKILL.md files from .claude/skills/.
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Couldn't render the SKILL.md content here right now. You can view the raw markdown or open the source folder on GitHub.