# Skill briefing

## Task in one sentence
From [input], produce [output] for [reader].

## Contract
- Output format, fields, units, and input sources:
- Example of approved output:
- Required content:
- What may vary:
- Allowed actions and stop condition:

## Procedure
1. Validate...
2. Transform...
3. Verify...
4. Deliver...

## Criteria and evidence
| Criterion | Blocking? | Verification method | Evidence |
| --- | --- | --- | --- |
| | | | |

## Cases
- Normal:
- Limit:
- Invalid:
- Reserved:

## Feedback
Observed → expected → impact → smallest correction → regression test.