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Skills are specialized instruction sets that shape how the agent approaches a particular category of task. When you ask Luminy to fix a failing test, design a data model, or explain a codebase, the agent automatically detects what kind of task you’re describing and injects the relevant skill instructions into its context — giving it a structured, proven approach for that specific situation. You don’t invoke skills manually; they activate based on what you ask.

How skills activate

When you send a message, the agent analyzes your intent and matches it against a library of built-in skills. Each skill has a set of trigger conditions — phrases, task types, and contextual signals. When a match is found, the skill’s instruction set is added to the agent’s active context for that turn, guiding how it reasons, what it checks, and how it structures its response. Skills are additive: they add guidance and best-practice structure on top of the agent’s normal behavior. They don’t restrict what you can ask for or limit the agent’s capabilities. If no specific skill matches, the agent proceeds with its default behavior.
Multiple skills can be active in the same turn. For example, a complex refactor might simultaneously activate planning_complex_change, gather_context, and refactor_to_pattern.

Built-in skills

Luminy ships with 35 built-in skills. The most commonly triggered ones are described below.

Understanding code

Debugging & fixing

Planning & design

Implementation

Quality & verification

Communication

Triggering skill-like behavior explicitly

Because skills activate automatically, you typically don’t need to think about them. However, you can guide the agent toward skill-like behavior by framing your request explicitly:

Trigger planning

Say “plan this change before implementing” or “walk me through how you’d approach this” to activate structured planning before any code is written.

Trigger self-review

Say “review what you just wrote” or “check your work before showing me” to activate the self-review pass explicitly.

Trigger root cause analysis

Say “don’t just fix the symptom — find the root cause” to activate systematic root cause reasoning before the agent reaches for a quick patch.

Trigger exploration

Say “explore the codebase first” or “gather context before making changes” to make sure the agent reads the relevant code before acting.
Skills work best when your message is specific about what you want. “Fix the bug” is fine, but “fix the bug in the auth middleware where expired tokens aren’t being rejected” gives the agent enough signal to activate the right skill and skip unnecessary exploration.