Coding Agent Skills
If you’re adding Logfire observability to your application with a coding agent, you can install the
Logfire skill from the pydantic/skills repository to give
your agent up-to-date framework knowledge.
Agent skills are packages of instructions and reference material that coding agents load on demand. The Logfire skill provides agents with patterns and guidance for instrumenting Python, JavaScript/TypeScript, and Rust applications, with auto-instrumentation for frameworks like FastAPI, httpx, asyncpg, and more.
Install the official Logfire plugin from the Anthropic marketplace, which is available by default:
claude plugin install logfire@claude-plugins-official
The plugin bundles skills, commands, and an MCP server. Claude will use the relevant skills automatically, or you can invoke a command directly:
/instrument
As an alternative, you can install from the pydantic/skills
marketplace, which bundles the Logfire skill alongside other Pydantic-maintained skills:
claude plugin marketplace add pydantic/skills
claude plugin install logfire@pydantic-skills
Install the Pydantic marketplace in Codex:
codex plugin marketplace add pydantic/skills --ref main
Then enable plugins from the Pydantic marketplace. Either enable them in the Codex plugin UI, or run:
codex plugin add logfire@pydantic-skills
codex plugin add logfire-exporter@pydantic-skills
Two plugins are available:
| Plugin | Purpose |
|---|---|
| Logfire | Gives Codex Logfire skills and the hosted Logfire MCP server for instrumentation, querying, and opening UI views. |
| Logfire Exporter | Exports completed Codex turns and tool calls to Logfire as OpenTelemetry traces. |
These plugins solve different problems and can be installed together. After enabling Logfire Exporter,
restart Codex and run /hooks if Codex asks you to review or trust the new hooks.
See also:
- Connect to MCP Server for how the Logfire plugin configures MCP access.
- Export Codex Activity to Logfire for exporter setup, configuration, and troubleshooting.
OpenCode discovers skills from .agents/skills/, so the cross-agent install
below works without extra configuration:
npx skills add pydantic/skills
OpenCode reads SKILL.md files from both the project directory and ~/.agents/skills/, walking up
from the current directory to the root of your repository. Confirm what it picked up with:
opencode debug skill
Pi implements the Agent Skills standard
and loads skills from ~/.agents/skills/ globally and .agents/skills/ in your project, so the
cross-agent install works there too:
npx skills add pydantic/skills
Each skill is also available as a /skill:<name> command, for example /skill:logfire-instrumentation.
Install the Logfire skill using the skills CLI:
npx skills add pydantic/skills
The CLI is interactive and lets you pick individual skills (e.g. logfire-instrumentation or
logfire-query) rather than installing the whole bundle.
This works with 30+ agents via the agentskills.io standard, including Claude Code, Codex, Cursor, OpenCode, and Pi.
Logfire also ships its skill bundled with the package, so you can install it directly from your project’s dependencies via library-skills.io:
uvx library-skills # Python
npx library-skills # JavaScript/TypeScript
Add --claude to also install into .claude/skills alongside the default .agents directory.
- Source repository: github.com/pydantic/skills
- Open standards: agentskills.io, library-skills.io
- Claude Code skills documentation: code.claude.com/docs/en/skills
- Claude Code plugins documentation: code.claude.com/docs/en/plugins