This skill should be used when the user says "ensure config", "check arn spark config", "arn-spark-ensure-config", "verify arn spark setup", "configure spark", "setup arness spark", "spark config", or wants to verify that Arness Spark configuration is present for the current project. This skill is primarily consumed as a reference by entry-point skills (arn-brainstorming, arn-spark-discover, arn-spark-arch-vision) which read the `references/step-0-fast-path.md` reference as Step 0 before proceeding with their workflow.

This skill should be used when the user says "cleanup", "infra cleanup", "arn infra cleanup", "clean up resources", "destroy expired resources", "check ttl", "check expired", "ttl cleanup", "remove old deployments", "destroy dev environment", "tear down", "teardown infra", "destroy resources", "cleanup ephemeral", "check for expired resources", "clean up infra", "resource cleanup", "destroy old resources", "prune resources", "delete expired deployments", "decommission", or wants to check for and destroy expired ephemeral infrastructure resources. This skill also supports periodic monitoring via `/loop 6h /arn-infra-cleanup` for session-duration TTL enforcement.

This skill should be used when the user says "spark help", "arn spark help", "greenfield status", "greenfield help", "where am I in spark", "what's next for spark", "spark pipeline", "spark status", "arn-spark-help", "show spark pipeline", "what step am I on for spark", "spark workflow", "exploration status", "show exploration pipeline", "how does spark work", "explain spark pipeline", or wants to see their current position in the Arness Spark exploration pipeline and get guidance on the next step.

This skill should be used when the user says "ensure config", "check arn infra config", "arn-infra-ensure-config", "verify arn infra setup", or wants to verify that Arness Infra configuration is present for the current project. This skill is primarily consumed as a reference by entry-point skills (arn-infra-wizard, arn-infra-assess) which read the `references/step-0-fast-path.md` reference as Step 0 before proceeding with their workflow.

Technical specification writing for implementation details. Use when documenting how to build a solution (post-decision), API contracts, schemas, and system design. Complements RFC skill which handles decision-making.

Creates new AI agent skills following the Agent Skills spec. Trigger: When user asks to create a new skill, add agent instructions, or document patterns for AI.

Ramp's UI design system. Use when building interfaces inspired by Ramp's aesthetic - light mode, Inter font, 4px grid.

Codeium's UI design system. Use when building interfaces inspired by Codeium's aesthetic - dark mode, Inter font, 4px grid.

Vercel's UI design system. Use when building interfaces inspired by Vercel's aesthetic - light mode, Inter font, 4px grid.

Ticktick's UI design system. Use when building interfaces inspired by Ticktick's aesthetic - light mode, Inter font, 4px grid.

Posthog's UI design system. Use when building interfaces inspired by Posthog's aesthetic - dark mode, Inter font, 4px grid.

Copy Ai's UI design system. Use when building interfaces inspired by Copy Ai's aesthetic - light mode, Inter font, 4px grid.

Warp's UI design system. Use when building interfaces inspired by Warp's aesthetic - light mode, Inter font, 4px grid.

Lemonsqueezy's UI design system. Use when building interfaces inspired by Lemonsqueezy's aesthetic - light mode, Inter font, 4px grid.

Mem's UI design system. Use when building interfaces inspired by Mem's aesthetic - light mode, Inter font, 4px grid.

Shopify's UI design system. Use when building interfaces inspired by Shopify's aesthetic - light mode, Inter font, 4px grid.

Resend's UI design system. Use when building interfaces inspired by Resend's aesthetic - dark mode, Inter font, 4px grid.

Obsidian's UI design system. Use when building interfaces inspired by Obsidian's aesthetic - dark mode, Inter font, 4px grid.

Replit's UI design system. Use when building interfaces inspired by Replit's aesthetic - light mode, Inter font, 4px grid.

Tldraw's UI design system. Use when building interfaces inspired by Tldraw's aesthetic - light mode, Inter font, 4px grid.