A skill says it helps with development. How would Codex distinguish when to use it from thousands of unrelated tasks?
Write a brief prediction before opening the explanation.
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Make the trigger specific
A skill should have a recognizable job and a description that names the situations where it helps. Consider a release-note drafting workflow: it takes an agreed change range and produces a sourced draft. That is a more useful scope than helping with all engineering. Include exclusions when nearby tasks would be misleading. A clear description helps selection; it does not establish that every matching request will be handled correctly.
Keep the method reusable
The skill body describes inputs, steps, output requirements and stop conditions. The current commit range, ticket and audience are task inputs rather than permanent instructions. Move lengthy optional examples into references with a cue describing when to read them. Do not bury an essential permission boundary in an optional appendix. A skill packages a method; it does not grant credentials, authorize publishing or prove that a command succeeded.
Evaluate discovery and behavior separately
Try an intended request, a paraphrase and a nearby request that should not use the skill. Then inspect what happens after selection: does the workflow request missing inputs, cite actual evidence and stop before an unauthorized write? The sample below illustrates the documented name/description structure. Its real selection rate is untested. Review local environment support before installation; this lesson neither installs nor executes the sample.
Making the description universal or treating skill selection as permission to publish.
Make the request actionable
A weak starting brief: name: helper; description: Use for everything. Always publish the result.
This example is an adaptable request, not evidence that a runtime action has executed.
A release-note skill
Simulated task: create a reusable method for drafting release notes from a supplied change range. It must not deploy, publish or manage incidents.
Simulated scenario · No repository access or command execution
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