Agent Skills vs last30days: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Agent Skills and last30days — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
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Agent Skills
Addy Osmani
Open-source library of production-grade engineering skills that make AI coding agents follow senior-engineer workflows across the full dev lifecycle.
Key features
- Lifecycle Slash Commands: Seven commands (/spec, /plan, /build, /test, /review, /code-simplify, /ship) that map to each phase of development.
- Auto Build Mode: /build auto generates a plan and implements every task autonomously after a single approval.
- Test-Driven Execution: Each task is test-driven and committed individually, pausing on failures or risky steps.
- Automatic Skill Activation: Skills activate based on what the developer is currently doing, without manual selection.
- Quality Gates: Encodes review and QA gates so agents enforce code-health standards before shipping.
- Spec-First Workflow: Enforces writing a spec and plan before code to keep agent output structured.
Best for
- Structured Agent Coding: Guide an AI coding agent through spec, plan, build, test, and ship in a disciplined flow.
- Autonomous Feature Builds: Approve a plan once and let the agent implement all tasks with per-task tests.
- Code Review Automation: Apply consistent review and simplification gates before merging.
- Onboarding Best Practices: Encode senior-engineer workflows so every project follows the same quality standards.
- Reducing Manual Steps: Cut the human hand-offs between tasks while preserving verification.
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last30days
mvanhorn
An AI agent skill that researches any topic across Reddit, X, YouTube, HN, Polymarket, and the web, then synthesizes a scored, grounded brief.
Key features
- Multi-Source Search: Searches Reddit, Hacker News, X, YouTube, TikTok, Polymarket, and the web in parallel.
- Engagement Scoring: Ranks results by upvotes, likes, transcripts, and real-money Polymarket odds instead of editorial picks.
- AI Judge Synthesis: An agent synthesizes all sources into a single grounded brief.
- Broad Host Support: Installs in Claude Code, Codex, Cursor, Copilot, Gemini CLI, and 50+ Agent Skills hosts.
- Zero-Config Start: Reddit, HN, Polymarket, and GitHub work immediately with no setup.
- Setup Wizard: Unlocks X, YouTube, and TikTok sources in about 30 seconds.
Best for
- Trend Research: Quickly understand what people are saying about a topic across social platforms.
- Market Sentiment: Combine social engagement with Polymarket odds to gauge real sentiment.
- Content Discovery: Surface the most-engaged posts and videos on a subject.
- Competitive Intelligence: Track recent discussion of a product or company across communities.