Conciseness

The body is dense and purposeful — a concrete output template, a five-phase process tree, and a quality bar with a worked example — with only minor trimmable material, matching the 4 anchor ("efficient; minor instances of over-explanation"): the three stub sections ("Contract", "Output Format", "Anti-Patterns") that exist only "for the conformance test" and rhetorical flourishes ("devastatingly relevant", "reading with a mission") add tokens without adding guidance.

Actionability

Concrete, executable guidance dominates: "pdftotext -layout", "Read first 2000 chars of each chapter", HIGH/MEDIUM/LOW triage rules, explicit output paths ("projects/<slug>/playbook.md"), and a full markdown template for the artifact; it falls short of the 5 anchor only on minor gaps such as "put_page via the standard CLI flow" (no actual command given) and EPUB extraction being delegated to another skill's SKILL.md.

Workflow Clarity

The five phases are clearly sequenced with concrete parameters per phase, and the "When it fails" section provides genuine feedback loops ("revision_conflict or write_pending (exit 10): re-read and merge, or poll gbrain write-request <request_id>"); a point below the 5 anchor because mid-process checkpoints (e.g., confirming the strategic problem is well-defined before deep reading, or verifying the written page) are implicit rather than explicit validation steps.

Progressive Disclosure

The body is well-organized with clear section headers and clearly signaled one-level-deep cross-references ([conventions/quality.md], [_brain-filing-rules.md], book-mirror and perplexity-research SKILL.mds); no bundle files exist in this skill (references/, scripts/, assets/ are absent), and the inline brain-page template is core content that belongs in SKILL.md, so this matches the 4 anchor — the conformance-test stub sections at the end are minor organizational clutter that keeps it from a 5.

Specificity

The description enumerates concrete inputs ("book, article, transcript, or case study") and several specific actions ("read... through the lens of a specific strategic problem", "produces an applied playbook", "gives short/medium/long-term recommendations"), which is comprehensive coverage comparable to the 5 anchor; however, the second-person phrasing "a specific strategic problem you're facing" incurs the rubric's mandatory 1-point voice penalty, bringing the score to 4.

Completeness

The "what" is clear and concrete, but the "when" is only negatively implied via "NOT for general book summaries" — there is no positive "Use when..." clause or equivalent trigger guidance in the description, which the judging guidelines explicitly cap at 3.

Trigger Term Quality

Natural keywords like "book", "article", "transcript", "case study", "strategic problem", and "playbook" give good coverage of terms a user would plausibly say, matching the 4 anchor ("good keyword coverage; a few natural terms missing") — e.g., no mention of EPUB/PDF or phrases like "apply this to my situation" inside the description itself.

Distinctiveness Conflict Risk

The combination of a distinctive lens ("through the lens of a specific strategic problem") with an explicit negative boundary ("NOT for general book summaries") carves out a clear niche with minimal conflict risk, matching the 5 anchor; without the boundary statement it would risk overlap with generic summarization skills.