Visual Studio Codeの拡張機能を自作して、理想の執筆環境を手に入れた 〆(ﾟ_ﾟ*) ref: http://qiita.com/piyo7/items/4202189d523572da736a

file0.txt

const decorationIconsColor = vscode.window.createTextEditorDecorationType({
    'color': '#c0c0c0'
})

let decorationIconsDict: { [key: string]: TextEditorDecorationType } = {}

function decorateIcons(editor: TextEditor) {
    let match: RegExpExecArray = null
    let iconLineDict: { [key: string]: number[] } = {}
    let iconLines: number[] = []
    const iconRegex = /^(\d\d)[「『]/gm
    while (match = iconRegex.exec(editor.document.getText())) {
        const icon = match[1]
        if (iconLineDict[icon] == null) iconLineDict[icon] = []
        iconLineDict[icon].push(editor.document.positionAt(match.index).line)
        iconLines.push(editor.document.positionAt(match.index).line)
    }

    editor.setDecorations(
        decorationIconsColor,
        iconLines.map(line => new vscode.Range(line, 0, line, 2)))

    for (const key in decorationIconsDict) {
        editor.setDecorations(decorationIconsDict[key], [])
    }
    if (iconFlag) {
        for (const key in iconLineDict) {
            if (decorationIconsDict[key] == null) {
                decorationIconsDict[key] = vscode.window.createTextEditorDecorationType({
                    'gutterIconPath': iconPath(key),
                    'gutterIconSize': 'contain'
                })
            }

            editor.setDecorations(
                decorationIconsDict[key],
                iconLineDict[key].map(line => new vscode.Range(line, 0, line, 0)))
        }
    }
}

function iconPath(name: string): string {
    return path.join(vscode.workspace.rootPath, '.vscode', 'icon', name + '.png')
}

file1.txt

const decorationInvalidTitleColor = vscode.window.createTextEditorDecorationType({
    'backgroundColor': '#FF8080'
})

function decorateInvalidTitle(editor: TextEditor) {
    let titleSpeech: [string, number] = null
    let lineNumbers: number[] = []
    for (let i = 0; i < editor.document.lineCount; i++) {
        const line = editor.document.lineAt(i)
        if (line.text.length > 0) {
            if (line.text[0] == '#') {
                if (titleSpeech != null) {
                    lineNumbers.push(titleSpeech[1])
                }

                const match = /[「『](.+)[」』]/.exec(line.text)
                if (match != null) {
                    titleSpeech = [match[1], line.lineNumber]
                } else {
                    titleSpeech = null
                }
            } else {
                if (titleSpeech != null && line.text.includes(titleSpeech[0])) {
                    titleSpeech = null
                }
            }
        }
    }
    if (titleSpeech != null) {
        lineNumbers.push(titleSpeech[1])
    }

    editor.setDecorations(
        decorationInvalidTitleColor,
        lineNumbers.map(line => new vscode.Range(line, 0, line + 1, 0)))
}

file2.txt

{
  "譚丁": "たんてい",
  "風蛇": "かざへび",
  "奉双譜": "ほうそうふ",
  "名塚": "なつか",
  "令": "れい",
  "有栖川": "ありすがわ",
  "和紀": "かずき",

file3.txt

function insertRuby() {
    const rubyDict: { [key: string]: string } = JSON.parse(
        fs.readFileSync(path.join(vscode.workspace.rootPath, '.vscode', 'ruby.json'), 'utf8'))

    const editor = vscode.window.activeTextEditor
    editor.edit((edit) => {
        let text = editor.document.getText().replace(/｜(.+?)《.+?》/g, '$1')
        let sections: string[] = []
        for (let section of text.split('#')) {
            for (const key in rubyDict) {
                section = section.replace(new RegExp(key), '｜' + key + '《' + rubyDict[key] + '》')
            }
            sections.push(section)
        }
        edit.replace(new Range(0, 0, editor.document.lineCount + 1, 0), sections.join("#"))
    })
}

const decorationRubyColor = vscode.window.createTextEditorDecorationType({
    'color': '#808080'
})

function decorateRuby(editor: TextEditor) {
    let ranges: Range[] = []
    let match: RegExpExecArray
    const rubyRegex = /｜(.+?)(《.+?》)/g
    while (match = rubyRegex.exec(editor.document.getText())) {
        const pos = editor.document.positionAt(match.index)
        ranges.push(
            new Range(pos.line, pos.character, pos.line, pos.character),
            new Range(
                pos.line, pos.character + 1 + match[1].length,
                pos.line, pos.character + 1 + match[1].length + match[2].length))
    }

    editor.setDecorations(decorationRubyColor, ranges)
}

file4.txt

function publish() {
    const editor = vscode.window.activeTextEditor
    editor.edit((edit) => {
        edit.replace(new Range(0, 0, editor.document.lineCount + 1, 0), editor.document.getText().
            replace(/^\d\d([「『])/gm, '$1').
            replace(/([」』])$/gm, '$1\r\n').
            replace(/\r\n^---$/gm, '　～～～'))
    })
}

file5.txt

function displayWordCount() {
    const document = vscode.window.activeTextEditor.document
    let count = 0
    for (let i = 0; i < document.lineCount; i++) {
        const line = document.lineAt(i).text
        if (line.length > 0 && line[0] != '#') {
            for (let j = 0; j < line.length; j++) {
                if (line.charCodeAt(j) > 127) count++
            }
        }
    }
    vscode.window.setStatusBarMessage(count.toString() + "文字")
}