feat: blog post template with visual planning

[asakin]

Summary

• Blog post template with a required Visual Plan section
• Per-content-type instructions for blog posts
• Agent-write routing for blog post creation

Origin

This was built and validated in a private wiki instance (SakinOS) during the writing of the first blog post. The template, visual planning protocol, and P.S. convention all emerged from real use in a single session. Promoted to upstream as a generic, user-agnostic version.

This is the standard contribution model: features get built in the personal instance first, validated under real conditions, then genericized and upstreamed.

What ships

_meta/templates/blog-post.md — Blog post template with:

• YAML frontmatter (type, summary, tags, seo_keywords, substack_tags, status, updated)
• Social Post section
• Visual Plan section (required) — code blocks, tables, screenshots (with placement, alt text, caption), pull quotes
• Full Draft section
• P.S. section for meta moments

_meta/instructions/blog-posts/instructions.md — Publishing guidance:

• Visual plan required before writing (2-3 elements minimum)
• SEO keywords: problem-first, not product-first
• Every screenshot needs placement, alt text, and caption
• Publishing flow: draft → review → publish → cross-post → update tracking
• P.S. convention documented

_meta/instructions/agent-write.md — Content-type routing added for blog posts.

Test plan

• Clone fresh, create a blog post draft — verify template is used
• Verify agent-write routing picks up blog post creation
• Verify instructions load when triggered

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