Add /skill-creator, a browser SKILL.md generator for the transactional skill creator query - #158
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The query family around "claude skill creator" is transactional and no page on the site serves it. This adds a free tool that writes a SKILL.md from the six frontmatter fields the Agent Skills specification defines, validates them as you type, and downloads the folder as <name>/SKILL.md. The generator is pure client-side: no API route, no model call, and no request leaves the page. It emits only specification fields on purpose, which is the set claude.ai uploads, the Skills API, and package_skill.py accept without an unexpected-key error. The prose under the tool explains what makes a SKILL.md valid, states what the checks do not cover, and describes what Anthropic's own skill-creator skill does, read from its SKILL.md, so a reader can tell which of the two they want.
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Important
This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Pro Plus Run ID: WalkthroughAdds a browser-based SKILL.md builder with validation, preview, clipboard and ZIP downloads. Adds the skill creator resource page, SEO schema, social images, navigation, sitemap registration, redirects, analytics, and comprehensive tests. ChangesSkill creator
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to The browser generator can currently alter meaningful Markdown formatting, copy drafts that validation would block from downloading, and serialize some metadata in a way that may change when imported. The PR is mergeable with explicit owner awareness, but these bounded correctness issues should be fixed or accepted before relying on the generated files. Sequence Diagram(s)sequenceDiagram
participant Visitor
participant SkillCreatorPage
participant SkillMdBuilder
participant SkillMd
participant Clipboard
participant ZipDownload
Visitor->>SkillCreatorPage: Open /skill-creator
SkillCreatorPage->>SkillMdBuilder: Render example draft
Visitor->>SkillMdBuilder: Edit skill fields
SkillMdBuilder->>SkillMd: Validate draft and build SKILL.md
SkillMd-->>SkillMdBuilder: Issues and generated document
Visitor->>SkillMdBuilder: Copy or download output
SkillMdBuilder->>Clipboard: Copy SKILL.md
SkillMdBuilder->>ZipDownload: Download skill folder ZIP
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🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description is comprehensive and covers the change, implementation approach, validation evidence, impact, analytics, SEO, routing, limitations, and merge considerations. It does not use the exact template headings or checklist format, but it provides the required information in equivalent sections. Full details: Docstring CoverageExplanation Docstring coverage is 30.95% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 42 functions across 15 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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| for (const entry of metadata) { | ||
| if (seen.has(entry.key)) continue | ||
| seen.add(entry.key) | ||
| rendered.push(` ${entry.key}: ${formatYamlScalar(entry.value)}`) |
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Metadata keys such as 1.0, true, or null pass METADATA_KEY validation but are emitted raw here, so YAML resolves them as numeric, boolean, or null keys rather than the string keys required by the metadata map. This can silently change a key (1.0 becomes 1) or make distinct entered keys collide after parsing; render the key through the same YAML-safe scalar formatter used for values.
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Fixed in 64f5a95. Metadata keys now go through formatYamlScalar, the same formatter the values already used, so 1.0, true, and null are emitted quoted and parse back as the strings that were typed instead of collapsing 1.0 onto 1. Related: YAML_RESERVED_WORD also covers the special floats now (.inf, .Inf, .INF, the signed forms, and .nan), which carry no digits and so slipped past YAML_NUMBER_LIKE when used as a value. Two round trip tests parse the generated file with the yaml package and check the keys stay distinct strings and that .inf / .nan stay text.
| <CopyButton | ||
| value={skillMd} | ||
| label="Copy the file" | ||
| ariaLabel="Copy the generated SKILL.md" | ||
| className="rounded-[3px]" | ||
| analytics={{ | ||
| event: "skill_md_generated", | ||
| properties: { output: "clipboard" }, | ||
| }} | ||
| /> |
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After the user clears the form or enters an invalid required field, the download buttons report that errors are blocking output, but this copy control remains active and copies the invalid document (for example, just ---\n---\n) while recording it as generated. Gate copying on blocked as well so the primary clipboard path cannot bypass the validation enforced for downloads.
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Fixed in 64f5a95. CopyButton now takes an optional disabled prop (defaults to false, so the other twelve call sites are untouched), which both disables the button and short circuits the copy handler, and the builder passes disabled={blocked}. The blocking message now reads "N errors are blocking the copy and the download." A test asserts the copy control and the two download controls all read the same blocked state.
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Actionable comments posted: 3
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Inline comments:
In `@components/skill-creator/skill-md-builder.tsx`:
- Around line 434-443: Update the CopyButton in the skill markdown builder to
pass disabled={blocked}, so clipboard copying is disabled whenever validation
blocks generation, matching the existing download controls.
In `@lib/skill-creator/skill-md.ts`:
- Around line 155-159: Update normalizeSkillBody so it preserves meaningful
trailing spaces within Markdown lines, including two-space hard line breaks,
while removing only the terminal blank-line run. Add a regression test covering
a body such as “first line \nsecond line” and verify the internal trailing
spaces remain unchanged.
- Around line 75-80: Update YAML_RESERVED_WORD to match signed special float
tokens such as .inf and .nan, then update frontmatterLines to pass entry.key
through formatYamlScalar before emitting metadata keys; apply these changes at
the identified declaration and frontmatterLines site while preserving existing
scalar formatting behavior.
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Configuration used: Organization UI
Review profile: CHILL
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📒 Files selected for processing (16)
analytics/posthog/events.tsapp/sitemap.tsapp/skill-creator/layout.tsxapp/skill-creator/opengraph-image.tsxapp/skill-creator/page.tsxapp/skill-creator/twitter-image.tsxcomponents/resources/resource-chrome.tsxcomponents/skill-creator/skill-creator-page.tsxcomponents/skill-creator/skill-md-builder.tsxlib/seo/skill-creator/index.tslib/seo/skill-creator/schema.tslib/seo/skill-creator/types.tslib/skill-creator/skill-md.tsnext.config.tspublic/llms.txttests/skill-creator.test.mjs
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Three review findings on the SKILL.md generator. CopyButton takes a disabled prop and the builder passes the blocked state to it, so a draft with errors can no longer reach the clipboard through the one control the download gate had missed. The blocking message names the copy alongside the download. A metadata key now runs through the same YAML scalar formatter as the value. A key such as 1.0, true, or null is legal input but parsed back as a number, a boolean, or null when written raw, and 1.0 collapsed onto 1. The reserved word pattern also covers the special floats .inf and .nan, which carry no digits and so slipped past the number pattern as values. normalizeSkillBody strips only the terminal run of blank lines. It used to strip trailing spaces from every line, which rewrote the two spaces Markdown reads as a hard line break.
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What this is
/skill-creator, a free tool page that generates a validSKILL.mdin the browser. Page 12 and the last of the phase 2 SEO set.The tool is a client component with no API route and no model call. It writes YAML frontmatter from the six fields the Agent Skills specification defines, validates them while you type, previews the exact bytes it will hand you, and downloads either
SKILL.mdor the folder as<name>/SKILL.md(reusinglib/deterministic-zip, code-split sofflatestays out of the initial bundle). Nothing is uploaded, stored, or persisted, and the page says so.Hypothesis
The query family around "claude skill creator" (1000/month, KD 48), plus "skill creator skill" (260, KD 18) and "claude skills creator" (110, KD 33), has transactional intent that no page on this site serves. Someone typing it wants an artifact, not an essay.
/guides/how-to-write-a-skill-mdexplains the format well and ranks for the explanatory query; it does not answer the person who wants the file.The risk stated in the plan is real: Anthropic ships an official
skill-creatorskill that owns the term, and a mediocre generator on this URL would cost more trust than the traffic is worth. The answer here is to be correct and to be honest about the boundary rather than to compete with it. Section 03 describes what Anthropic's skill actually does, read from its ownSKILL.md: the intent interview, the paired with-skill and baseline runs, the graded benchmark and review viewer, the twenty-query trigger eval with a held-out test split, and the packaging script. It also says plainly that all of that needs a Claude session. This page is positioned as the instant scaffold beside it, not as a replacement.Expected metric
At 2 to 4 weeks, in Search Console: impressions and average position for the "skill creator" query family on
/skill-creator, and whether the page starts taking those impressions instead of/guides/how-to-write-a-skill-mdreceiving them and converting nobody.Usage is measured by
$pageviewon/skill-creator. No custom event duplicates anything a pageview already carries.One custom event is added,
skill_md_generated, withoutput: "clipboard" | "folder_zip" | "skill_md". It follows the existing pattern inanalytics/posthog/events.ts(non team scoped, one union property, a comment saying why it exists). The justification: the URL never changes while the tool is used, so a pageview cannot distinguish a reader who looked from one who carried a file away. That is the only question worth asking about a tool page and the only one this event answers.How we will know it worked
skill_md_generatedto$pageviewon/skill-creatoris above zero and stable. A page that ranks and generates nothing means the tool is wrong, not the keyword.landing_cta_clickedis expected from this page and none is being optimized for. It is an acquisition surface for the term, with one inline CTA and one closing CTA.Design choices
No hero CTA. Every article page mounts four CTA locations. This one mounts three: header, inline, closing. The action above the fold is the generator, and putting a sign-up button in front of it would trade the reason the reader arrived for a click they did not come for. A test asserts
skill_creator_herodoes not appear.Six fields, on purpose. Claude Code accepts twenty frontmatter fields and adds fourteen of its own. claude.ai uploads, the Skills API, and packaging with
package_skill.pyaccept six, and reject anything else with a hard unexpected-key error. The generator writes six, and the page explains that if you needwhen_to_useordisable-model-invocationyou add it by hand and accept that the folder then stays inside Claude Code.YAML quoting is the part most generators get wrong.
isPlainYamlScalaris conservative: a description with:in it, one that reads as a number, or one that reads as the wordnois written as a double-quoted scalar; everything else stays plain, the way the published examples write it. This matters because malformed frontmatter does not fail loudly. The body loads with empty metadata and the skill silently stops triggering on its own. There is a round-trip test that parses generated output back with theyamlpackage already in the repo.Validation cites its source and grades itself. Errors are specification rules (name charset and shape, the 64, 1024, and 500 character caps, metadata key shape and duplicates). Warnings are guidance with attribution: the reserved words
anthropicandclaudein a name, the XML-tag rule, a description that never says when to use the skill, the experimental status ofallowed-tools, and the 500-line body budget. Warnings never block the download, because guidance is not a rule.Section 02 states the limits before anyone asks. The tool checks frontmatter, not the skill. It cannot tell you whether the skill will trigger, because triggering is measured rather than inspected. It is not the reference validator, and the reference validator says of itself that it is demonstration software.
WebApplication rather than TechArticle in the JSON-LD, with the usual FAQPage and BreadcrumbList. Describing a generator as an article would claim the wrong thing about the page.
Facts and sources
Every constraint the tool enforces was read from a primary source on 25 August 2026 and each is cited on the page with the date: the Agent Skills specification, the Claude Code skills documentation, Anthropic's skill authoring best practices, the
skill-creatorSKILL.mdinanthropics/skills, and theskills-refREADME. No metric about Skills Board itself appears anywhere on the page.Deviations from the brief, and why
No Markdown twin. The twins are generated from the content registries (
resourceEntries,alternatives, home, developers) and render a page as an article. A text rendering of a form would be a worse answer than the guide we already publish at/guides/how-to-write-a-skill-md, which is the page an agent asking this question in Markdown should get./skill-creator.mdreturns 404, which is the documented behaviour for a page with no twin, and a test asserts it. Thellms.txtentry says so explicitly so an agent does not go looking.Not registered in
resourceEntries. ItscontentTypeis"tool", not"guide"or"article", so it stays out of the collection that feeds/resourcesand the twins. The sitemap entry is written out explicitly, the way/developersand/pricingare. A test asserts both halves of this.One shared file touched for inbound links.
components/resources/resource-chrome.tsxgains a footer link, so every marketing page points at the tool and it is not an orphan. The homepage is untouched, per the rule against forced links from the home page.Merge order with #157
#157 gtm/manage-ai-skills-linksalso touchespublic/llms.txt. This branch adds exactly one line, in the "Write and validate" section directly under the SKILL.md guide, and changes nothing else in that file (theLast revieweddate is left alone on purpose to keep the conflict surface at one line). Either order works; whichever lands second takes the one-line addition. #157 also toucheslib/seo/guides/types.ts, which this branch imports from and does not edit.Test evidence, run locally before pushing
node --test tests/*.test.mjs: 543 passing, 0 failing (509 onmain, 34 added).tsc --noEmitwith the repo's TypeScript 7.0.2: clean.next buildproduction: exit 0./skill-creatorand both social images build; the page is partially prerendered like its siblings.next start:/skill-creator200, titleClaude Skill Creator: Generate a Valid SKILL.md | Skills Board, canonicalhttps://www.skillsboard.sh/skill-creator,/skill-creator/308 to the canonical path,sitemap.xmlcontains the URL,llms.txtcontains the URL,/skill-creator.md404,WebApplicationpresent in the JSON-LD, the footer link present on/agent-skills, and zero em dashes or en dashes in the rendered HTML.Summary by CodeRabbit
New Features
SKILL.mdfiles in the browser.Analytics