The ~449-line body is accurate and largely payload-focused, but the Quick Reference and Examples sections repeat payloads already shown in the Core Workflow phases, and some explanatory framing (e.g., basic comment/encoding concepts) restates what Claude already knows — mostly efficient but could be tightened.

Provides concrete, copy-paste-ready SQL payloads for UNION, error-based, blind, time-based, and OOB extraction plus database fingerprinting queries and a payload quick-list table — fully executable and specific.

Phases 1–4 are clearly sequenced, but this is a database-operation workflow lacking explicit validation gates between detection and exploitation; per the rubric, missing feedback loops for database operations caps workflow clarity at 2.

The body is well-sectioned but monolithic at ~449 lines with no bundle files or external references; payload catalogs and examples that should be split into separate reference files are inlined, fitting the level-2 anchor of content that should be separate kept inline.

Names concrete actions — "identifying, exploiting, and understanding SQL injection attack vectors" — alongside attack-vector coverage across database systems; only minor fluff ("comprehensive techniques") keeps it from being flawless, but it lists multiple specific actions like the level-3 anchor.

Explicitly answers both: what ("provides comprehensive techniques for identifying, exploiting, and understanding...") and when ("should be used when the user asks to...") with explicit trigger guidance, matching the level-3 anchor.

Quotes six natural user phrases including the common abbreviation "SQLi" ("perform SQLi attacks", "test for SQL injection vulnerabilities", "bypass authentication using SQL injection"), giving good coverage of terms users would actually say.

SQL injection is a clear, narrow niche with distinct triggers unlikely to fire for unrelated skills, matching the level-3 "clear niche with distinct triggers" anchor.