Arness Spark Ensure Config
Verify and establish Arness Spark configuration for the current project. This skill guarantees that a valid user profile and ## Arness section exist before any Arness Spark workflow proceeds. It runs automatically as Step 0 of all entry-point skills via a hash-based fast-path cache.
Entry points should NOT read this SKILL.md directly. They should read ${CLAUDE_PLUGIN_ROOT}/skills/arn-spark-ensure-config/references/step-0-fast-path.md, which runs the cache-check shell script and only falls through to the full validation when needed. This indirection is what saves ~95% of ensure-config token cost.
When invoked DIRECTLY (rare — typically via /arn-spark-ensure-config), this skill bypasses the cache and runs the full validation flow.
Workflow
Read ${CLAUDE_PLUGIN_ROOT}/skills/arn-spark-ensure-config/references/ensure-config.md and follow its instructions (Layers 1–2, then Layer 3 cache write).