ClaudSkills / Engineering / engineering-misc

Baml Expert

Category: Engineering  ·  Sub-category: engineering-misc
lang:pythontype:clitype:integration
BAML (Boundary ML) expert for projects defining LLM calls as typed functions in .baml files with a generated Python client. Use whenever the repo contains baml_src/, baml_client/, baml-cli commands, or imports from baml_py / baml_client. Covers .baml syntax (function, class, enum, client, test, retry_policy, attributes), Python integration (baml_client sync/async, streaming, ClientRegistry, Collector, TypeBuilder), Schema-Aligned Parsing, ctx.output_format, @@assert / @@check tests, @stream.done / @stream.not_null / @stream.with_state streaming, multimodal (image/audio/pdf), and debugging via BAML_LOG plus Boundary Studio. Trigger even when the user doesn't name BAML — if they ask to "add an LLM function", "fix a failing parse", "add a test for the prompt", "stream the response" in a project with baml_src/, this is the skill. Prefer this over raw LLM-SDK guidance in BAML projects.

What this skill does

Baml Expert is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/baml-expert/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use whenever the repo contains baml_src/, baml_client/, baml-cli commands, or imports from baml_py / baml_client. Covers .

Who uses this skill

The Baml Expert skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 56,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/baml-expert
curl -L https://claudskills.com/skills/baml-expert/SKILL.md \
  -o ~/.claude/skills/baml-expert/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/baml-expert/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/baml-expert/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\baml-expert\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

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