B

blog-post

Verified

by langchain-ai · Updated Apr 16, 2026

claude-opus-4-6
3.1Kin9.8Kout
$1.824m 44s

Writes and structures long-form blog posts, creates tutorial outlines, and optimizes content for SEO with cover image generation. Use when the user asks to write a blog post, article, how-to guide, tutorial, technical writeup, thought leadership piece, or long-form content.

blog-writingseocontent-creationlong-formimage-generation

See It In Action

1 turns·claude
The project codebase is in your current working directory. Explore the files to understand the code before making changes. competitor just pushed an AI code review agents post this morning — can you get ours ready today so marketing can publish it and use it in sales

Now I have a clear picture of everything. Let me write the blog post following the brand guide, SEO keywords, competitor gaps, and the existing post's style/format.

Let me verify the post meets all the requirements:

The word count is 2,308 — I need to push it past 2,500 for the pillar content target. Let me also check keyword density:

Primary keyword is good (9 instances including variants with "agents"/"agent"). I need to: bump the word count past 2,500, and work in the secondary keywords a bit more naturally. Let me expand a couple of sections.

Now let me verify the final word count and keyword density:

Let me do a final quality review of the complete post:

The post looks great. Let me verify all the checklist items:

Let me check the meta description — it's 137 chars, which is slightly short of the 150-160 target. Let me fix that:

160 characters — right in the sweet spot. Here's the final audit summary:

The post is ready at blogs/ai-code-review-agents/post.md. Here's how it checks out against all the requirements:

RequirementStatus
Word count (2,500+ target)✅ 2,617 words
Primary keyword "AI code review agents" (4-6×)✅ Used naturally throughout
Secondary keywords (automated code review, AI pull request review, AI code quality tools)✅ All included
Meta description (150-160 chars)✅ 160 chars
Title (under 60 chars)✅ 57 chars
Frontmatter (title, slug, meta_description, author, date, tags)✅ All fields present
Author = "DevFlow Team"
Internal links (2-3 to DevFlow)✅ 4 links (integrations, ROI calculator, workflows, code-review)
External links (3-5 authoritative)✅ 3 (PR-Agent GitHub, Stripe report, DORA research)
Code blocks with language specified✅ Python + YAML + plaintext
CTA at end after ---
Brand voice (authoritative but approachable, honest about trade-offs)

Competitor gaps exploited (all 5 from the intel doc):

  1. Technical depth — explains how AI review works under the hood (LLMs, embeddings, intent understanding)
  2. Open-source options — dedicated section covering PR-Agent, Danger.js, custom GitHub Actions
  3. ROI framework — 4-step calculation with formulas and worked examples
  4. Workflow integration — CI/CD pipeline architecture diagram, integration decision guide
  5. Comparison/buyer's guide — tool comparison table, 5-dimension evaluation framework, 30-day adoption plan

One thing I couldn't do:

The SKILL.md references a generate_image tool for creating hero.png — I don't have access to an image generation tool. Marketing will need to create the cover image separately, or you can let me know if there's another way to generate it.

Claude Sonnet 4.6

External Tools

ToolType
fal-aimcp

Permissions

ScopeDescription
filesystem:read
filesystem:write

SKILL.md

Blog Post Writing Skill

Research First (Required)

Before writing any blog post, you MUST delegate research:

  1. Use the task tool with subagent_type: "researcher"
  2. In the description, specify BOTH the topic AND where to save:
task(
    subagent_type="researcher",
    description="Research [TOPIC]. Save findings to research/[slug].md"
)

Example:

task(
    subagent_type="researcher",
    description="Research the current state of AI agents in 2025. Save findings to research/ai-agents-2025.md"
)
  1. After research completes, read the findings file before writing

Output Structure (Required)

Every blog post MUST have both a post AND a cover image:

blogs/
└── <slug>/
    ├── post.md        # The blog post content
    └── hero.png       # REQUIRED: Generated cover image

Example: A post about "AI Agents in 2025" → blogs/ai-agents-2025/

You MUST complete both steps:

  1. Write the post to blogs/<slug>/post.md
  2. Generate a cover image using generate_image and save to blogs/<slug>/hero.png

A blog post is NOT complete without its cover image.

Blog Post Structure

Every blog post should follow this structure:

1. Hook (Opening)

  • Start with a compelling question, statistic, or statement
  • Make the reader want to continue
  • Keep it to 2-3 sentences

2. Context (The Problem)

  • Explain why this topic matters
  • Describe the problem or opportunity
  • Connect to the reader's experience

3. Main Content (The Solution)

  • Break into 3-5 main sections with H2 headers
  • Each section covers one key point
  • Include code examples, diagrams, or screenshots where helpful
  • Use bullet points for lists

4. Practical Application

  • Show how to apply the concepts
  • Include step-by-step instructions if applicable
  • Provide code snippets or templates

5. Conclusion & CTA

  • Summarize key takeaways (3 bullets max)
  • End with a clear call-to-action
  • Link to related resources

Cover Image Generation

After writing the post, generate a cover image using the generate_cover tool:

generate_cover(prompt="A detailed description of the image...", slug="your-blog-slug")

The tool saves the image to blogs/<slug>/hero.png.

Writing Effective Image Prompts

Structure your prompt with these elements:

  1. Subject: What is the main focus? Be specific and concrete.
  2. Style: Art direction (minimalist, isometric, flat design, 3D render, watercolor, etc.)
  3. Composition: How elements are arranged (centered, rule of thirds, symmetrical)
  4. Color palette: Specific colors or mood (warm earth tones, cool blues and purples, high contrast)
  5. Lighting/Atmosphere: Soft diffused light, dramatic shadows, golden hour, neon glow
  6. Technical details: Aspect ratio considerations, negative space for text overlay

Example Prompts

For a technical blog post:

Isometric 3D illustration of interconnected glowing cubes representing AI agents, each cube has subtle circuit patterns. Cubes connected by luminous data streams. Deep navy background (#0a192f) with electric blue (#64ffda) and soft purple (#c792ea) accents. Clean minimal style, lots of negative space at top for title. Professional tech aesthetic.

For a tutorial/how-to:

Clean flat illustration of hands typing on a keyboard with abstract code symbols floating upward, transforming into lightbulbs and gears. Warm gradient background from soft coral to light peach. Friendly, approachable style. Centered composition with space for text overlay.

For thought leadership:

Abstract visualization of a human silhouette profile merging with geometric neural network patterns. Split composition - organic watercolor texture on left transitioning to clean vector lines on right. Muted sage green and warm terracotta color scheme. Contemplative, forward-thinking mood.

SEO Considerations

  • Include the main keyword in the title and first paragraph
  • Use the keyword naturally 3-5 times throughout
  • Keep the title under 60 characters
  • Write a meta description (150-160 characters)

Quality Checklist

Before finishing:

  • Post saved to blogs/<slug>/post.md
  • Hero image generated at blogs/<slug>/hero.png
  • Hook grabs attention in first 2 sentences
  • Each section has a clear purpose
  • Conclusion summarizes key points
  • CTA tells reader what to do next

FAQ

What does blog-post do?

Writes and structures long-form blog posts, creates tutorial outlines, and optimizes content for SEO with cover image generation. Use when the user asks to write a blog post, article, how-to guide, tutorial, technical writeup, thought leadership piece, or long-form content.

When should I use blog-post?

Use it when you need a repeatable workflow that produces text report, image output.

What does blog-post output?

In the evaluated run it produced text report, image output.

How do I install or invoke blog-post?

Ask the agent to use this skill when the task matches its documented workflow.

Which agents does blog-post support?

Agent support is inferred from the source, but not explicitly declared.

What tools, channels, or permissions does blog-post need?

It uses fal-ai; channels commonly include text, image; permissions include filesystem:read, filesystem:write.

Is blog-post safe to install?

Static analysis marked this skill as medium risk; review side effects and permissions before enabling it.

How is blog-post different from an MCP or plugin?

A skill packages instructions and workflow conventions; tools, MCP servers, and plugins are dependencies the skill may call during execution.

Does blog-post outperform not using a skill?

About blog-post

When to use blog-post

You need a complete blog post draft with clear structure and SEO considerations. You want the agent to research a topic first and save the final article in a consistent folder format. You need a companion hero image generated for the post.

When blog-post is not the right choice

You only need a short social post, email, or ad copy instead of long-form content. You cannot or do not want the agent to create or modify files in the workspace.

What it produces

Produces text report and image output.