Conciseness

Nearly every token carries repo-specific, non-derivable knowledge (write-path table, FIELD_SOURCE_MAP, attribution rules, storage math) with no boilerplate explanation of concepts Claude already knows. Not 5: the devMac-vs-devGUID section spends extra prose re-emphasizing its point ("This isn't a migration gap to eventually close; it's a structural ceiling...") that could be tightened to one sentence.

Actionability

Fully executable artifacts: a 17-row write-path inventory with file/function/fields, the literal FIELD_SOURCE_MAP dict, concrete attribution SQL ("COALESCE(NULLIF(NEW.<field>Source, ''), 'system')"), a copy-paste AFTER UPDATE trigger with WHEN guard, and ready-to-use DevicesHistory DDL with indexes. Not 4: the code is complete and directly usable, not hint-level.

Workflow Clarity

A clear decision flow is present: audit ALL write paths first (with the inventory to do it), then the trigger-vs-Python-hook criteria list, then the attribution rules and pattern. Not 5: there are no explicit validation checkpoints (e.g., how to verify the write-path audit is complete or how to test a new trigger against the executemany paths). Not 3: the 'audit ALL write paths before implementing' step plus explicit when-triggers/when-hooks criteria form a coherent, well-sequenced decision process.

Progressive Disclosure

As a single-file skill (no references/, scripts/, or assets/ exist), it is cleanly sectioned with headers, each section scoped to one concern, and no nested-reference indirection. Not 5: the ~17-row write-path inventory table is the kind of repo-derived lookup data that could live in a one-level-deep reference file, keeping SKILL.md as a leaner overview; inline it makes the core file longer than an overview needs to be.

Specificity

"designing a feature that writes to the Devices table, adding audit/history logging, or choosing between a SQLite trigger and a Python hook" plus "Covers the full Devices write-path inventory, the FIELD_SOURCE_MAP *Source attribution system, and event-sourced vs snapshot audit logging tradeoffs" names multiple concrete capabilities that map one-to-one onto the skill's sections, with no vague filler. Not 4: coverage is comprehensive, matching the skill's actual contents rather than leaving minor gaps.

Completeness

Both halves are explicit: "Read before designing a feature that writes to the Devices table..." answers 'when' with concrete trigger phrases, and "Covers the full Devices write-path inventory, the FIELD_SOURCE_MAP *Source attribution system, and... tradeoffs" answers 'what'. Not 4: neither half needs more explicitness; both use concrete, specific phrasing.

Trigger Term Quality

Natural, likely-spoken terms are present: "Devices table", "audit/history logging", "SQLite trigger", "Python hook", "event-sourced vs snapshot". Not 5: a few natural entry phrases users might say are absent (e.g., "device history", "change log", "database schema/migration"). Not 3: keyword coverage is strong and domain-appropriate, not merely 'some relevant keywords'.

Distinctiveness Conflict Risk

The description is anchored to a specific repo artifact ("Devices table", "FIELD_SOURCE_MAP") and specific mechanisms (SQLite trigger vs Python hook), forming a clear niche with minimal overlap risk against generic database skills. Not 4: the repo-specific naming makes conflict with any other skill's triggers very unlikely.