Skills, tested

Decided by: two candidates named the class, so the closer output format took it. The deciding text is at: SKILL.md, section heading, in anthropics/skills skills/skill-creator at 3b3fad96af16.

Two candidates name the class. The task class is scored on a single SKILL.md whose frontmatter must parse and whose section order must match SKILL_AUTHORING.md. writing-skills prescribes that document's section order under the heading above. skill-creator prescribes an authoring and evaluation workflow, and the structure it prescribes under its own Report structure heading is an evaluation report rather than the SKILL.md. writing-skills is the closer output format.

Addendum. RECORDED AFTER THE FACT, ON 2026-08-26, AND NOT ACTED ON. This tiebreak was decided when the skill-authoring class was scored against SKILL_AUTHORING.md alone. That document is now Key B, disclosed and unranked, and the ranked key is the open Agent Skills specification. The tiebreak reasoning above therefore turns on a basis that is no longer the ranked one. It is left exactly as it was decided, because a selection record that is rewritten to agree with a later ruling is not a record of what was decided. The selection was NOT re-run against Key A, and whether it would produce the same candidate is an open question stated here rather than assumed.

Second addendum. SECOND ADDENDUM, 2026-08-26. THE TIEBREAK WAS RE-RUN WITH KEY A AS THE OUTPUT-FORMAT BASIS, AND IT SWAPPED. Basis: the selection rule is unchanged, but the output format the class is scored on is now the open Agent Skills specification rather than SKILL_AUTHORING.md. Candidates compared: the same two that qualified, obra/superpowers skills/writing-skills and anthropics/skills skills/skill-creator. Result: skill-creator. It prescribes the specification's own model of the artifact, naming the required and the optional frontmatter fields, the bundled directory layout, the progressive disclosure levels and the line ceiling. writing-skills prescribes a body section order, which is the one part of a SKILL.md the specification explicitly leaves unconstrained, and it disagrees with the specification in three places: it puts the thousand and twenty four character limit on the whole frontmatter rather than on the description, it tells an author the description must not say what the skill does where the specification asks for both, and the example name in its own template is capitalised where the specification allows lowercase only. Run through Key A, writing-skills' own template fails a predicate and skill-creator's passes every applicable one. The original record and the first addendum above are left exactly as written. obra/superpowers skills/writing-skills moves to the rejected pins, where its bytes stay committed and its quoted sentence stays resolvable.

Decided by: one candidate named the class in its own when-to-use. The deciding text is at: SKILL.md frontmatter, description, in affaan-m/ECC skills/accessibility at d8409a4b0813.

• obra/superpowers has no skill naming accessibility in any when-to-use.
• anthropics/skills has none either; webapp-testing names browser testing rather than accessibility.

Decided by: two candidates named the class, so the closer output format took it. The deciding text is at: SKILL.md, section heading, in affaan-m/ECC skills/product-capability at d8409a4b0813.

Two candidates name the class. The task class is scored on a document with required sections and acceptance criteria, so the closer output format is the one that fixes its sections. product-capability declares a canonical artifact and a section-by-section output format under the heading above. doc-coauthoring prescribes a three-stage collaboration and fixes no sections in the document it produces.

Addendum. RECORDED AFTER THE FACT, ON 2026-08-26, AND NOT ACTED ON. This tiebreak was decided when the skill-authoring class was scored against SKILL_AUTHORING.md alone. That document is now Key B, disclosed and unranked, and the ranked key is the open Agent Skills specification. The tiebreak reasoning above therefore turns on a basis that is no longer the ranked one. It is left exactly as it was decided, because a selection record that is rewritten to agree with a later ruling is not a record of what was decided. The selection was NOT re-run against Key A, and whether it would produce the same candidate is an open question stated here rather than assumed.

Second addendum. SECOND ADDENDUM, 2026-08-26. RE-EXAMINED, NOT RE-RUN, AND THE CANDIDATE IS UNCHANGED. Basis: this tiebreak was never decided on the operator's house standard. The spec-writing class is scored on the section list and the acceptance-criterion pattern that the task prompt states to BOTH arms, which is a contract the two arms are given rather than a convention one of them was taught, and R7 did not move it. Key A is the answer key for the skill-authoring class and has no bearing here. Candidates compared: the same two that qualified, affaan-m/ECC skills/product-capability and anthropics/skills skills/doc-coauthoring. Result: unchanged, product-capability. THE FIRST ADDENDUM ABOVE IS WRONG ON THIS SLOT and is left in place rather than edited. It was applied to both output-format tiebreaks at once and says this one was decided against SKILL_AUTHORING.md, which it was not. Correcting it by rewriting would hide that the error was made; this sentence is the correction.

Decided by: one candidate named the class in its own when-to-use. The deciding text is at: SKILL.md frontmatter, description, in affaan-m/ECC skills/seo at d8409a4b0813.

• obra/superpowers has no skill naming search or on-page work in any when-to-use.
• anthropics/skills has none either.

Decided by: one candidate named the class in its own when-to-use. The deciding text is at: SKILL.md frontmatter, description, in affaan-m/ECC skills/brand-voice at d8409a4b0813.

• obra/superpowers has no skill naming writing voice in any when-to-use.