Conciseness

The body is lean and assumes Claude's competence: no space is spent explaining what Tessl, rubrics, or plugins are; every section (tables of weights, bash scaffolding blocks, the rubric template) is load-bearing instruction. It matches the 'every token earns its place' anchor rather than the level below, where trimming would still be needed.

Actionability

Guidance is copy-paste executable throughout: the mkdir/curl/cp scaffold commands, heredoc-quoted plugin.json and config.json writers, a complete minimal rubric JSON template, the exact 'tessl review run' validation command, and a healthy-output checklist. It fully matches the 'copy-paste ready, covers the common cases' anchor.

Workflow Clarity

Six clearly sequenced steps with decision points up front (fork vs scratch, judge count/weights with an explicit weight invariant), an explicit validation step (Step 6) with expected healthy output, and a feedback loop: 'If the plugin fails validation... Fix the relevant file and re-run', backed by a Common problems table for error recovery. This matches the top anchor with validation checkpoints and error-recovery loops.

Progressive Disclosure

The single-file body is well organized with clear sections, and it correctly points to the canonical default rubric via an on-demand fetch instead of bundling a copy. However, the ~45-line inline rubric JSON template (and to a lesser extent the SKILL.md-customisation guidance) is content that could live in a one-level-deep reference file for a skill of this length, so it fits the 'good structure, minor organization gaps' anchor rather than the perfectly-split top anchor. Not a 3 because nothing is buried: every section is clearly signaled and nothing belongs to a second-level reference.

Specificity

The description enumerates concrete, specific actions — 'scaffolds the plugin directory, writes rubric files and config.json, and validates with tessl review run' — comprehensively covering the full workflow (scaffold, author via fork or scratch, write, validate). It stays in third person ('Fetches', 'scaffolds', 'validates'), so no voice penalty applies.

Completeness

It explicitly answers both questions: 'what' ('Scaffold and author a custom Tessl reviewer plugin, by forking the default rubric or building one from scratch... validates with tessl review run') and 'when' with a literal 'Use when the user wants to...' clause listing concrete triggers — matching the score-5 anchor exactly.

Trigger Term Quality

The 'Use when' clause covers the natural phrases a user would actually say: 'create or customise a review plugin', 'fork or tweak the default reviewer rubric', 'change scoring weights', 'add custom judges', 'build a domain-specific rubric', plus the product trigger 'tessl review'. Synonyms are included (create/customise, fork/tweak), matching the comprehensive-coverage anchor; there is no natural term missing for this domain.

Distinctiveness Conflict Risk

The niche is tightly scoped to Tessl reviewer plugins with distinct trigger vocabulary ('reviewer rubric', 'scoring weights', 'custom judges', 'tessl review'), so it is unlikely to fire for unrelated plugin- or rubric-related requests. Not the level below (4) because there is no meaningful overlap with closely related skills.