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Tools Mcp

Enrichment pendingWe haven’t run our AI enrichment pass on this listing yet, so the overview, use cases, and FAQ below may be sparse or missing. We work through the catalog over time — check back soon.
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MCP tools: WCAG contrast, JP char/X-weight count, WebP convert, JSON-LD, llms.txt.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to CursorAdd to VS Code
Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Install Config Generator

Choose your client
claude_desktop_config.json
{
  "mcpServers": {
    "tools-mcp-2": {
      "command": "npx",
      "args": [
        "-y",
        "@first-ch/tools-mcp"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Install Tool Schemas (13) Directory Badge Claim listing Alternatives🏢 More in Workplace & Productivity

Capabilities & Tool Schemas (13) ~856 tokensApproximate context cost of this server’s tool schemas (~4 chars/token), before any tool is called. Actual usage depends on your client and model.Self-reported Self-reportedParsed from the repository README, not verified against a live server — may be incomplete or out of date.

Inspect callable tools, capabilities, and parameters exposed to AI agents by Tools Mcp.

contrast_check

Computes the WCAG 2.1 contrast ratio between a foreground and background color and returns AA/AAA pass/fail (normal text, large text, UI components)

count_chars

Counts Japanese text by grapheme, breaks it down into zenkaku/hankaku, counts lines, and computes the X (Twitter) post weight (zenkaku=2, hankaku=1, URL=23 flat, limit 280)

webp_convert

Converts PNG/JPEG files (absolute paths) to WebP using the same libwebp WASM encoder (default quality 80) as the browser tool at tools.first-ch.com/webp/. Output defaults to the same directory as each input with a `.webp` extension

jsonld_generate

Generates schema.org JSON-LD for `organization` / `faqpage` / `service` / `breadcrumb`. Empty fields are omitted automatically. Returns both a `json` object and a ready-to-embed `<script>` snippet

llmstxt_generate

Generates an `llms.txt` file (per the llmstxt.org proposed format) summarizing a site for AI crawlers/agents

encoding_convert

Detects the character encoding (UTF-8 / Shift_JIS), BOM and line endings (CRLF / LF / CR) of a file or text and converts it to UTF-8. Useful for diagnosing garbled Japanese CSVs and for normalising line endings. Output is UTF-8 only — encoding *to* Shift_JIS is not supported (no standard API, and a…

Documentation Overview

@first-ch/tools-mcp

MCP server exposing First CH Tools' free web-tool logic — WCAG contrast, JP character/X-weight counting, WebP conversion, JSON-LD generation, llms.txt generation, encoding/line-ending conversion, Marp Markdown→slide rendering, Japanese/English test-data generation, text/code diffing, cron-expression explanation, Base64/data-URI encoding, URL query-parameter editing, and HTML entity escaping/unescaping — to AI agents such as Claude Code.

日本語版は 後半セクション を参照してください。

Install

Three ways to add this server, pick whichever fits your client.

Requires Node.js >=18.14.1 (all three methods below run the server via npx, so Node must be installed even when the MCP client itself — e.g. Claude Code's native, no-Node install — doesn't strictly require it).

1. npm, via the Claude Code CLI

Terminal
claude mcp add firstch-tools -- npx -y @first-ch/tools-mcp

2. Claude Code plugin (also installs the same MCP server)

Code
/plugin marketplace add First-CH/firstch-tools-mcp
/plugin install firstch-tools@first-ch

3. Any other MCP client (generic JSON config)

Add to your client's server config (e.g. mcp.json / claude_desktop_config.json):

config.json
{
  "mcpServers": {
    "firstch-tools": {
      "command": "npx",
      "args": ["-y", "@first-ch/tools-mcp"]
    }
  }
}

This server is also registered in the MCP Registry as io.github.First-CH/tools-mcp (see server.json), so registry-aware clients can discover and install it by that name too.

Tools

ToolWhat it doesMain input
contrast_checkComputes the WCAG 2.1 contrast ratio between a foreground and background color and returns AA/AAA pass/fail (normal text, large text, UI components)fg, bg (hex, e.g. #333333 / 333 / fff)
count_charsCounts Japanese text by grapheme, breaks it down into zenkaku/hankaku, counts lines, and computes the X (Twitter) post weight (zenkaku=2, hankaku=1, URL=23 flat, limit 280)text
webp_convertConverts PNG/JPEG files (absolute paths) to WebP using the same libwebp WASM encoder (default quality 80) as the browser tool at tools.first-ch.com/webp/. Output defaults to the same directory as each input with a .webp extensionpaths[] (absolute paths), quality? (1-100), outputDir?
jsonld_generateGenerates schema.org JSON-LD for organization / faqpage / service / breadcrumb. Empty fields are omitted automatically. Returns both a json object and a ready-to-embed <script> snippettype, plus the matching organization / faq / service / breadcrumb object
llmstxt_generateGenerates an llms.txt file (per the llmstxt.org proposed format) summarizing a site for AI crawlers/agentssiteName, summary?, notes?, sections?
encoding_convertDetects the character encoding (UTF-8 / Shift_JIS), BOM and line endings (CRLF / LF / CR) of a file or text and converts it to UTF-8. Useful for diagnosing garbled Japanese CSVs and for normalising line endings. Output is UTF-8 only — encoding to Shift_JIS is not supported (no standard API, and a mapping table would be required).base64 or text, mode (analyze | convert), encoding, newline, bom
marp_renderRenders Marp Markdown to slides. Emits a self-contained HTML file (theme CSS inlined; opens in a browser and prints one-slide-per-page) and optionally PDF. Ships a bundled Japanese theme firstch (firstch-design tokens: paper/ink/vermilion, IBM Plex Sans JP) used as the default theme. Marp front-matter in the Markdown (theme: / paginate: / size: / <!-- _class: lead -->) is honored.markdown or inputPath, theme?, formats? (html | pdf), outputPath?, title?
testdata_generateGenerates dummy data for form / CSV-import testing. mode=records returns names, kana readings, addresses, postal codes, emails and phone numbers as CSV/TSV/JSON/XLSX with a choice of encoding (UTF-8 / Shift_JIS), BOM and line endings. format=xlsx returns a real Excel workbook as base64 (or writes it to outputPath) — the ZIP/OOXML parts are assembled directly, with no spreadsheet dependency, and postal codes and phone numbers are written as text cells so leading zeros survive; mode=text returns strings of exactly n-1 / n / n+1 characters for maxlength boundary tests. All output is fictional (emails use the RFC 2606 example.com family). Passing a seed makes the output reproduciblemode?, rows?, fields?, format?, locale?, encoding?, newline?, bom?, header?, seed?, preset?, length?, outputPath?
diff_checkCompares two texts (or two files) and returns the added/removed/changed line counts plus a unified diff (.patch) — the same logic as the browser tool at tools.first-ch.com/diff/. Lines are matched with patience diff (lines occurring exactly once in both sides become anchors), falling back to Myers only inside anchor-less ranges. With format=blocks / both, paired changed lines are also compared at token level (runs of letters/digits are one token, CJK characters one each) and returned as changed_parts, so you can see which words changed. CRLF/CR/LF all count as the same line break; trailing-whitespace-only differences are ignored by defaulta/b (text) or pathA/pathB (absolute paths), format? (unified | blocks | both), context?, ignoreWhitespace?, ignoreCase?, words?
cron_explainExplains a cron expression in plain language and returns the upcoming run times — the same logic as the browser tool at tools.first-ch.com/cron/. Parsing follows Vixie cron (crontab(5)): ranges, steps, lists, JAN-DEC / SUN-SAT names and the @daily-style shorthands; six fields means the first one is seconds (node-cron / Spring style). warnings call out the traps — day-of-month and day-of-week are OR'd (not AND'd) when both are restricted, */n that does not divide its range evenly is not a uniform interval, and impossible dates such as February 30th never fire. Run times are found on the wall clock of the target time zone and converted back to real instants, so they stay correct across daylight-saving transitionsexpression, timeZone? (IANA, default UTC), count? (default 5, max 100), from? (ISO 8601)
base64_encodeEncodes text or a file as Base64 and a data: URI, and returns ready-to-paste HTML <img> / CSS background-image snippets — the same logic as the browser tool at tools.first-ch.com/base64/. With mode="decode" it turns Base64 or a data URI back into bytes, writing them to outputPath when given. For SVG it returns both encodings and defaults to the shorter one (percent-encoding beats Base64, which always inflates by ~33%), always escaping & " < > # %, whitespace and non-ASCII so the URI drops straight into an HTML attribute or a CSS url("…"). Decoding accepts standard or URL-safe Base64, tolerates whitespace and newlines, does not require padding, and trusts the actual magic numbers (PNG/JPEG/GIF/WebP/ico/PDF/zip/woff/woff2/SVG) over the MIME type a data URI claimsmode? (encode default / decode), text? or path?, base64?, outputPath?, urlSafe?, wrap? (76 for MIME), dataUri?, mimeType?, snippets?
url_paramsBreaks a URL's query string into keys and values, edits it (set / remove / utm / removeTracking / sort) and rebuilds it — the same logic as the browser tool at tools.first-ch.com/url/. Values come back decoded (%XX to characters, + to a space), and parameters you did not touch are written back byte-for-byte, so calling it with nothing but a url returns exactly what you passed in — signed URLs survive a round trip. reencode normalises the whole query with encodeURIComponent rules instead. warnings flag duplicate keys, unencoded spaces and non-ASCII, broken %XX, + being read as a space, mixed-case UTM values, a missing utm_source/utm_medium, passwords in the URL, credential-looking keys and URLs over 2,000 characters. Relative paths and broken percent-encoding are parsed as far as they can be read instead of throwing. mode="encode" / "decode" converts a bare string instead (scheme: component / uri / form). No network access — the URL is never fetchedurl?, mode? (parse default / encode / decode), text?, scheme?, set?, remove?, utm?, removeTracking?, sort?, reencode?, spaceAsPlus?
html_escapeEscapes < > & " ' into HTML entities, or with mode="unescape" turns entities such as &amp;, &#39; and &#x3042; back into characters — the same logic as the browser tool at tools.first-ch.com/html-escape/. Escaping handles & first, so a second pass never double-escapes what the first pass produced; pick named or numeric references (numeric), decide whether quotes are escaped (quotes, mandatory inside an attribute value) and whether ' is written as &#39; or &apos; (apos — &apos; does not exist in HTML 4.01), and encode non-ASCII characters as references (nonAscii) when the charset may not survive the pipeline. Unescaping covers all 252 named references from HTML 4.01 plus decimal and hexadecimal ones, maps C1-range references such as &#128; to their Windows-1252 characters as the spec requires, and leaves unknown names, out-of-range numbers and semicolon-less references untouched rather than guessing. notes reports already-escaped input, bare &, missing semicolons, unknown entity names and no-break spaces (U+00A0)mode? (escape default / unescape), text? or path?, outputPath?, quotes?, apos?, numeric?, nonAscii? (none / named / decimal / hex)

See server.mjs for the exact Zod input schemas.

PDF output (marp_render) needs a local Chrome/Chromium. marp-core renders the HTML with no browser dependency (so the package stays light for npx); PDF is produced by driving a locally-installed Chrome/Chromium in headless mode. It is auto-detected on common paths, or set MARP_CHROME_PATH to the executable. If none is found, marp_render returns the HTML only and reports pdf_skipped — you can still open that HTML and print → PDF yourself (one slide per page).

Telemetry

Nothing is logged by default. Usage is recorded only when you set the FIRSTCH_TOOLS_USAGE_LOG environment variable to a file path — each tool call then appends one JSON line ({ ts, tool, source }) to that local file. There is no network transmission of any kind; if the variable is unset, no file is written and no data leaves your machine.

Web version

The same algorithms are also available as a free, no-install browser tool at tools.first-ch.com — useful when you want a UI instead of an MCP call, or want to hand a link to someone without an MCP client.

Vendor sync (WebP codec)

webp_convert bundles a vendored, unmodified subset of @jsquash/webp v1.5.0 under vendor/jsquash-webp/. The web version at tools.first-ch.com vendors the exact same v1.5.0 subset, so both surfaces produce identical output. Each side's CI independently verifies its vendored files against vendor/jsquash-webp/CHECKSUMS.sha256 (see .github/workflows/ci.yml), so a silent, unnoticed drift between the two copies isn't possible.

License

The package itself is licensed under MIT.

It bundles a subset of jSquash's WebP codec under vendor/jsquash-webp/ to power webp_convert, which carries its own licenses:

  • The jSquash wrapper code is licensed under Apache-2.0 — see vendor/jsquash-webp/LICENSE.
  • The underlying libwebp codec (WASM binary and its JS glue) is licensed under BSD-3-Clause, Copyright (c) 2010 Google Inc. — see vendor/jsquash-webp/codec/LICENSE.codec.md.

Both license files are included verbatim in the published npm package, as required by their respective terms (BSD-3-Clause in particular requires the copyright notice, condition list, and disclaimer to be reproduced in binary redistributions).

Development

Terminal
npm ci
npm test        # unit tests (lib.mjs / webp.mjs / marp.mjs / testdata.mjs / diff.mjs / cron.mjs), see test.mjs
node e2e.mjs     # stdio smoke test: spawns server.mjs, lists tools, calls a couple of handlers

CI runs both across Node 18.14.1 / 20 / 22, plus a vendor checksum check and a published-tarball content check — see .github/workflows/ci.yml.


日本語

@first-ch/tools-mcp は、First CH Tools(無料Webツール集)の計算ロジック — WCAGコントラスト比・日本語文字数/Xウェイト計測・WebP変換・JSON-LD生成・llms.txt生成・文字コード/改行コード変換・Marp Markdown→スライド レンダリング・テストデータ生成・テキスト/コード差分・Cron式の解説・Base64/Data URI変換・URLパラメータの分解/編集/再構築・HTML特殊文字のエスケープ/エンティティのデコード — をAIエージェント(Claude Code等)向けMCPツールとして提供するサーバーです。

インストール

導入経路は3通りあります。使っているクライアントに合わせて選んでください。

Node.js >=18.14.1 が必要です(以下いずれの方法も npx 経由でサーバーを起動するため。Claude Code本体はNode不要のnativeインストールもありますが、その場合でもNodeは別途必要です)。

1. npm(Claude Code CLI)

Terminal
claude mcp add firstch-tools -- npx -y @first-ch/tools-mcp

2. Claude Code plugin(同じMCPサーバーを導入)

Code
/plugin marketplace add First-CH/firstch-tools-mcp
/plugin install firstch-tools@first-ch

3. その他のMCPクライアント(汎用JSON設定)

設定ファイル(mcp.json / claude_desktop_config.json 等)に以下を追加します。

config.json
{
  "mcpServers": {
    "firstch-tools": {
      "command": "npx",
      "args": ["-y", "@first-ch/tools-mcp"]
    }
  }
}

本サーバーは MCP Registry にも io.github.First-CH/tools-mcp として登録済みです(server.json 参照)。レジストリ対応クライアントはこの名前からも発見・導入できます。

ツール一覧

ツール何をするか主な入力
contrast_check文字色と背景色のWCAG 2.1コントラスト比を計算し、AA/AAA基準(通常テキスト・大テキスト・UI部品)の合否を返すfg・bg(hex。例: #333333 / 333 / fff)
count_chars日本語テキストを書記素単位で数え、全角/半角内訳・行数・X(Twitter)投稿ウェイト(全角=2・半角=1・URL=一律23・上限280)を返すtext
webp_convertPNG/JPEG画像(絶対パス)をWebPへ変換する。tools.first-ch.com/webp/ と同一のlibwebp WASMエンコーダ(品質既定80)。出力先省略時は各入力と同じ場所に拡張子.webpで保存paths[](絶対パス)・quality?(1-100)・outputDir?
jsonld_generateschema.org準拠のJSON-LDを生成する(organization / faqpage / service / breadcrumb)。空項目は自動で省略。jsonオブジェクトと埋め込み用<script>スニペットの両方を返すtype と対応する organization / faq / service / breadcrumb オブジェクト
llmstxt_generateAI検索・生成AI向けにサイト概要を伝える llms.txt(llmstxt.org提案フォーマット準拠)を生成するsiteName・summary?・notes?・sections?
encoding_convertファイル/テキストの文字コード(UTF-8 / Shift_JIS)・BOM有無・改行コード(CRLF / LF / CR)を判定し、UTF-8へ変換する。日本語CSVの文字化け調査、改行コードの統一に。出力はUTF-8のみ(Shift_JISへのエンコードは標準APIに無く変換表が必要なため非対応)base64 または text、mode(analyze | convert)、encoding、newline、bom
marp_renderMarp Markdown をスライドへレンダリングする。テーマCSSをインラインした自己完結HTML(ブラウザで開けて、印刷すると1スライド=1ページ)と、任意でPDFを書き出す。和文テーマ firstch(firstch-design トークン: 紙/墨/朱・IBM Plex Sans JP)を同梱し既定テーマにする。Markdown内の Marp フロントマター(theme: / paginate: / size: / <!-- _class: lead -->)はそのまま効くmarkdown または inputPath、theme?、formats?(html | pdf)、outputPath?、title?
testdata_generateフォーム入力・CSV取り込みテスト用のダミーデータを生成する。mode=records は氏名・フリガナ・住所・郵便番号・メール・電話番号などをCSV/TSV/JSON/XLSXで返し、文字コード(UTF-8 / Shift_JIS)・BOM・改行コードを指定できる。format=xlsx は Excel ファイル本体を base64(または outputPath へ書き出し)で返す。ZIP+OOXMLを依存ライブラリなしで直接組み立てており、郵便番号・電話番号は文字列セルにするため先頭の0が消えない。mode=text は maxlength の境界値テスト用に n-1 / n / n+1 文字ちょうどの文字列を返す。生成データはすべて架空(メールは RFC 2606 の example.com 系)。seed を渡すと同じデータを再現できるmode?・rows?・fields?・format?・locale?・encoding?・newline?・bom?・header?・seed?・preset?・length?・outputPath?
diff_check2つのテキスト(またはファイル)を比較し、追加/削除/変更の行数と unified diff(.patch)を返す。tools.first-ch.com/diff/ と同一ロジック。行の対応づけは patience diff(両方に1回だけ現れる行をアンカーに分割)+アンカーの取れない範囲だけ Myers。format=blocks / both では、変更行のペアを語単位(英数字はひとかたまり・和文は1文字ずつ)でも比較し changed_parts として返すため「どの語が変わったか」まで取れる。CRLF/CR/LF は同じ行区切りとして扱い、行末の空白だけの差は既定で無視するa/b(テキスト)または pathA/pathB(絶対パス)、format?(unified | blocks | both)、context?、ignoreWhitespace?、ignoreCase?、words?
cron_explainCron式を人間向けの文へ読み下し、次回からの発火日時を返す。tools.first-ch.com/cron/ と同一ロジック。解釈は Vixie cron(crontab(5))準拠で、範囲・ステップ・列挙・JAN-DEC / SUN-SAT の名前・@daily 等の省略記法に対応し、6フィールドのときは先頭を秒として扱う(node-cron / Spring 形式)。誤りやすい点は warnings で知らせる(「日」と「曜日」の両方指定は AND ではなく OR、範囲を割り切らない */n は等間隔にならない、2月30日のような存在しない日付は発火しない)。発火日時はタイムゾーンの壁時計上で求めてから実時刻へ戻すため、夏時間のある地域でもずれないexpression、timeZone?(IANA名・既定 UTC)、count?(既定5・最大100)、from?(ISO 8601)
base64_encodeテキストやファイルを Base64・data: URI へ変換し、そのまま貼れる HTML <img> / CSS background-image のスニペットも返す。tools.first-ch.com/base64/ と同一ロジック。mode="decode" では Base64 や data URI を元のバイト列へ戻し、outputPath を渡せばファイルとして書き出す。SVGは両方のエンコードを返して短い方を既定にし(base64は必ず約1.33倍になるためパーセントエンコードの方が小さい)、& " < > # % と空白・非ASCIIを必ずエスケープするのでHTML属性にもCSSの url("…") にもそのまま貼れる。デコードは標準/URLセーフのどちらでも、空白・改行混じりでも、パディングが欠けていても読み取り、data URI が名乗るMIMEタイプより実際のマジックナンバー(PNG/JPEG/GIF/WebP/ico/PDF/zip/woff/woff2/SVG)から判定した種類を優先するmode?(既定 encode / decode)、text? または path?、base64?、outputPath?、urlSafe?、wrap?(MIMEは76)、dataUri?、mimeType?、snippets?
url_paramsURLのクエリ文字列をキーと値へ分解し、編集(set / remove / utm / removeTracking / sort)して再構築する。tools.first-ch.com/url/ と同一ロジック。値はデコードして返し(%XX を元の文字へ、+ を半角スペースへ)、触っていないパラメータは生の文字列のまま書き戻すため、url だけを渡した場合の出力は入力と1バイトも変わらない(署名付きURLを通しても壊れない)。reencode を立てると全体を encodeURIComponent の規則へ正規化する。warnings では重複キー・未エンコードのスペースや非ASCII・壊れた %XX・+ のスペース解釈・UTM値の大文字混在・utm_source/utm_medium の片落ち・URL内のパスワード・トークンらしきキー・2000文字超を知らせる。相対パスや壊れたパーセントエンコードでも例外にせず読める範囲まで分解する。mode="encode" / "decode" では文字列単体を変換する(scheme: component / uri / form)。URLへのアクセスは行わないurl?、mode?(既定 parse / encode / decode)、text?、scheme?、set?、remove?、utm?、removeTracking?、sort?、reencode?、spaceAsPlus?
html_escapeテキスト中の < > & " ' をHTMLエンティティへ変換し、mode="unescape" では &amp; &#39; &#x3042; などの文字参照を元の文字へ戻す。tools.first-ch.com/html-escape/ と同一ロジック。エスケープは & を最初に処理するため、1回目の出力をもう一度通しても二重エスケープにならない。名前付きと数値文字参照の切り替え(numeric)、引用符を変換するか(quotes・属性値へ入れるなら必須)、' を &#39; と &apos; のどちらで書くか(apos・&apos; はHTML 4.01に無い)、非ASCII文字を参照にするか(nonAscii・文字コードが伝わらない経路への保険)を選べる。デコードはHTML 4.01の名前付き文字参照252個すべてと10進/16進に対応し、&#128; のようなC1領域の参照は仕様どおり Windows-1252 の文字へ読み替え、知らない名前・範囲外の数値・セミコロン無しの参照は推測で変換せずそのまま残す。notes ではすでにエスケープ済みの入力・裸の &・セミコロンの閉じ忘れ・知らないエンティティ名・ノーブレークスペース(U+00A0)の混入を知らせるmode?(既定 escape / unescape)、text? または path?、outputPath?、quotes?、apos?、numeric?、nonAscii?(none / named / decimal / hex)

正確な入力スキーマ(Zod定義)は server.mjs を参照してください。

marp_render のPDF出力にはローカルの Chrome/Chromium が必要です。 marp-core によるHTML生成はブラウザ非依存(npx 導入を軽く保つため)で、PDFはローカルインストール済みの Chrome/Chromium を headless で駆動して生成します。定番パスから自動検出し、MARP_CHROME_PATH で実行ファイルを明示することもできます。見つからない場合は HTML のみを返し pdf_skipped を報告します(そのHTMLを開いて印刷→PDF保存でも1スライド=1ページで作成できます)。

計測(Telemetry)について

既定では何も記録しません。環境変数 FIRSTCH_TOOLS_USAGE_LOG にファイルパスを設定したときのみ、各ツール呼び出しごとに1行のJSON({ ts, tool, source })をそのローカルファイルへ追記します。ネットワーク送信は一切ありません(未設定であればファイルへの書き込み自体が発生せず、データが端末外に出ることはありません)。

Web版

同一アルゴリズムを、インストール不要の無料ブラウザツールとしても公開しています: tools.first-ch.com。UIで使いたいとき・MCPクライアントを持たない相手にリンクを共有したいときはこちらをどうぞ。

vendor同期(WebPコーデック)

webp_convert は @jsquash/webp v1.5.0 の無改変サブセットを vendor/jsquash-webp/ 配下に同梱しています。Web版(tools.first-ch.com)も同じv1.5.0サブセットを無改変で使っており、双方が同一の出力を返します。各リポジトリのCIが独立に、自身のvendorファイルを vendor/jsquash-webp/CHECKSUMS.sha256 に対して検証するため(.github/workflows/ci.yml 参照)、両者が気づかないうちに乖離することはありません。

ライセンス

本パッケージ自体は MIT です。

webp_convert のために jSquash のWebPコーデックの一部を vendor/jsquash-webp/ 配下に同梱しており、それぞれ別のライセンスが適用されます。

  • jSquashのラッパーコード部分は Apache-2.0 — vendor/jsquash-webp/LICENSE を参照
  • 内部で使われるlibwebpコーデック本体(WASMバイナリとそのJSグルーコード)は BSD-3-Clause, Copyright (c) 2010 Google Inc. — vendor/jsquash-webp/codec/LICENSE.codec.md を参照

いずれのライセンスファイルも公開npmパッケージに原文のまま同梱しています(BSD-3-Clauseはバイナリ再配布時にも著作権表示・条件・免責事項の再掲を求めるため)。

開発者向け

Terminal
npm ci
npm test        # ユニットテスト(lib.mjs / webp.mjs / marp.mjs)。詳細は test.mjs
node e2e.mjs     # stdio smokeテスト: server.mjsを子プロセス起動しツール一覧取得・実行を検証

CIはNode 18.14.1 / 20 / 22 の3系統に加え、vendorチェックサム検証・公開tarball内容検査を実行します(.github/workflows/ci.yml 参照)。

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