Lists multiple specific concrete actions and technologies: creating Iceberg tables, enabling External Iceberg Reads on Delta tables, configuring external engines via Unity Catalog IRC, integrating with Snowflake catalog, credential vending, PyIceberg, OSS Spark access.

Clearly answers both 'what' (Apache Iceberg tables on Databricks with specific capabilities listed) and 'when' (explicit 'Use when...' clause with four distinct trigger scenarios covering table creation, External Iceberg Reads, external engine configuration, and Snowflake integration).

Excellent coverage of natural terms a user would use: 'Iceberg tables', 'Databricks', 'Uniform', 'Delta tables', 'Streaming Tables', 'Materialized Views', 'compatibility mode', 'Unity Catalog', 'IRC', 'Snowflake', 'PyIceberg', 'OSS Spark', 'credential vending', 'Iceberg v3'. These are the exact terms practitioners would use.

Highly distinctive niche combining Apache Iceberg + Databricks with very specific technical triggers like 'External Iceberg Reads', 'Unity Catalog IRC', 'credential vending', and 'Snowflake interop'. Extremely unlikely to conflict with other skills.

The content is dense with domain-specific information that Claude wouldn't inherently know — Databricks-specific TBLPROPERTIES, version-specific behaviors, UniForm nuances, and critical gotchas. There's no padding or explanation of basic concepts. Every section earns its place.

The Quick Start section provides fully executable SQL examples covering multiple scenarios (no clustering, PARTITIONED BY, CLUSTER BY on v2 and v3, UniForm enablement). The Common Issues table gives specific solutions with exact property names and commands. The critical rules are concrete and specific.

The 'When to Use' section provides clear decision routing for every major use case. The Critical Rules section establishes explicit constraints and validation checkpoints (e.g., must determine pattern before writing code, must disable DVs for CLUSTER BY on v2). The capability matrix clarifies read/write boundaries. For this type of skill (reference/configuration rather than multi-step destructive operations), the workflow guidance is appropriate and complete.

Excellent progressive disclosure — the SKILL.md serves as a clear overview with quick start examples, then routes to five well-organized reference files with descriptive summaries and keywords. References are one level deep, clearly signaled in both the Reference Files table and the When to Use section. Navigation is intuitive.