Conciseness

The body is dense policy content — a tier table, specific commands, and short code snippets — with no padding explaining concepts Claude already knows. Minor trimming is possible: the 'Don't' list repeats the Tier 4 prohibitions already enumerated in the Modification Taxonomy section, and the eject paragraph ('Manual copying is only the fallback described by an unknown third-party package's add-style blueprint') is convoluted. This fits the 4 anchor (efficient with minor instances that could be trimmed) rather than the 3 anchor's 'some unnecessary explanation', since nothing is concept padding.

Actionability

Guidance is fully executable: copy-paste commands ('pnpm typecheck && pnpm lint', 'git checkout -- <file>', 'npx @agent-native/core@latest upgrade', 'agent-native upgrade', 'agent-native eject'), concrete TypeScript snippets for `data-*` attributes and `window.__appState`, and a tier table with specific file examples. Specific examples cover the common cases, matching the 5 anchor.

Workflow Clarity

The Git Checkpoint Pattern is a numbered 5-step sequence with an explicit validation step ('Run `pnpm typecheck && pnpm lint`') and a feedback loop on failure ('If verification fails → revert with `git checkout -- <file>`'), and the tier table adds per-tier validation requirements ('Ask for explicit approval first', 'Never modify these'). This matches the 5 anchor — clear sequence, explicit validation, error-recovery loop — including for the destructive operation of source modification.

Progressive Disclosure

There are no bundle files (no references/, scripts/, or assets/ directories), so all content lives in the well-sectioned SKILL.md body (~124 lines). Sections are clearly organized (Rule, Why, Taxonomy, Checkpoint, Designing, Don't, Related Skills) and cross-skill pointers are clearly signaled one level deep ('upgrade-agent-native', 'customizing-agent-native', 'internationalization'). This fits the 4 anchor (good structure, references mostly clear, minor organization gaps) rather than 5, since the body exceeds the under-50-line simple-skill case and some detail (e.g., the eject/upgrade rules or the design patterns) could be offloaded to reference files.

Specificity

The description names the domain ('Tiers, checkpoints, and off-limits paths for an agent editing the app's own source') and several concrete actions ('designing UI for agent editability, deciding whether a file is safe for the agent to change', 'tempted to patch config, `.env`, or an `@agent-native/*` package'). It lists several specific actions but they are topic categories rather than the fully enumerated, comprehensive action list of the 5 anchor, so it sits above the 1-2 concrete actions of the 3 anchor.

Completeness

It explicitly answers both questions: what ('Tiers, checkpoints, and off-limits paths for an agent editing the app's own source') and when ('Use when designing UI for agent editability, deciding whether a file is safe... or when tempted to patch config, `.env`, or an `@agent-native/*` package'), with a concrete negative scope guard ('Do not load it for ordinary source edits') that sharpens the 'when'. This matches the 5 anchor's explicit what + when with concrete trigger phrases.

Trigger Term Quality

Natural trigger phrases are present and domain-specific — 'designing UI for agent editability', 'deciding whether a file is safe for the agent to change', 'patch config, `.env`, or an `@agent-native/*` package', plus the negative trigger 'Do not load it for ordinary source edits'. Coverage is good with concrete file/package names, but it misses some common variations users might say (e.g., 'self-modifying', 'editing its own code'), so it falls just short of the comprehensive synonym coverage of the 5 anchor.

Distinctiveness Conflict Risk

It occupies a clear niche (rules for an agent editing its own app's source) with distinct, specific triggers, and the explicit exclusion ('Do not load it for ordinary source edits') prevents it from firing on routine edits — minimal conflict risk with generic coding skills, matching the 5 anchor.