Cover Letter Prompt

Write a cover letter for {{role}} at {{company}}.
My background: {{background}}
Two most relevant achievements: {{achievements}}
Why this company: {{reason}}

Requirements:
1. Under 300 words.
2. First paragraph: why this role plus one concrete proof.
3. Second: the most relevant achievement in situation-action-result form.
4. Third: the unique value you bring.
5. Do not repeat the resume line by line.
6. End with a clear next step.