The user wants me to write a blog article in Spanish about creating a budget (crear un presupuesto). Let me review the requirements:

1. Length: 900-1200 words

2. Structure: Convincing intro → 3-4 H2 sections with substantial content → Conclusion with CTA

3. Each H2 section needs a practical prompt with "PROMPT:" syntax

4. Specific steps, real tools, specific metrics

5. At least 2 practical examples

6. A section on common mistakes

7. References to current versions of ChatGPT, Claude, Gemini (2026)

Style rules:

- Professional but warm tone

- Perfect Spanish orthography with accents

- No markdown, no HTML

- No self-references

- Varied vocabulary

- Prompts must have variables in [brackets]

The output format should be:

[Section title]

Content in paragraphs.

Prompt
[practical prompt text]