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Every agent starts with g1t's foundational skills, playbooks for documents, research, data, code, communication, and files and media, each using only tools the agent already has and saying plainly what isn't possible yet: agents make PDFs, Word documents, spreadsheets, CSV and Markdown files with make_file, kept with a doc in Artifacts and served from g1tusercontent.com; an agent's Skills tab shows what each skill can do and with which tools, and owners turn a skill off per agent; the agent skills guide says how.1/**
2 * The Markdown agents write, read into a few kinds of block for the files
3 * `make_file` writes (pdf.ts, ooxml.ts). Not a full CommonMark parser: the
4 * subset a document needs (headings, paragraphs, bold, italic, code, links,
5 * lists, quotes, code blocks, rules and tables), read forgivingly. Pure.
6 */
7
8export type Span = { text: string; bold?: boolean; italic?: boolean; code?: boolean; href?: string };
9
10export type Block =
11 | { kind: "heading"; level: 1 | 2 | 3; spans: Span[] }
12 | { kind: "paragraph"; spans: Span[] }
13 | { kind: "item"; ordered: boolean; number: number; depth: number; spans: Span[] }
14 | { kind: "quote"; spans: Span[] }
15 | { kind: "code"; text: string }
16 | { kind: "rule" }
17 | { kind: "table"; header: Span[][]; rows: Span[][][] };
18
19/** Inline Markdown as spans: **bold**, *italic*, `code`, [links](url); ~~strike~~ and HTML tags read as their text. */
20export function parseSpans(text: string): Span[] {
21 const spans: Span[] = [];
22 const push = (span: Span) => {
23 if (!span.text) return;
24 const last = spans[spans.length - 1];
25 if (last && !!last.bold === !!span.bold && !!last.italic === !!span.italic && !!last.code === !!span.code && last.href === span.href) last.text += span.text;
26 else spans.push(span);
27 };
28 const walk = (input: string, marks: { bold?: boolean; italic?: boolean; href?: string }) => {
29 let i = 0;
30 let plain = "";
31 const flush = () => {
32 if (plain) push({ text: plain, ...marks });
33 plain = "";
34 };
35 while (i < input.length) {
36 const rest = input.slice(i);
37 const ch = input[i]!;
38 if (ch === "\\" && i + 1 < input.length && /[\\`*_{}[\]()#+\-.!|~>]/.test(input[i + 1]!)) {
39 plain += input[i + 1];
40 i += 2;
41 continue;
42 }
43 if (ch === "`") {
44 const end = input.indexOf("`", i + 1);
45 if (end > i) {
46 flush();
47 push({ text: input.slice(i + 1, end), code: true, ...(marks.href ? { href: marks.href } : {}) });
48 i = end + 1;
49 continue;
50 }
51 }
52 const link = /^\[([^\]]*)\]\(([^)\s]+)(?:\s+"[^"]*")?\)/.exec(rest);
53 if (link && !marks.href) {
54 flush();
55 walk(link[1]!, { ...marks, href: link[2]! });
56 i += link[0].length;
57 continue;
58 }
59 const image = /^!\[([^\]]*)\]\(([^)\s]+)[^)]*\)/.exec(rest);
60 if (image) {
61 flush();
62 push({ text: image[1] || "image", ...marks, href: image[2]! });
63 i += image[0].length;
64 continue;
65 }
66 const strong = /^(\*\*|__)(?=\S)([\s\S]*?\S)\1/.exec(rest);
67 if (strong && (strong[1] === "**" || !/\w/.test(input[i - 1] ?? ""))) {
68 flush();
69 walk(strong[2]!, { ...marks, bold: true });
70 i += strong[0].length;
71 continue;
72 }
73 const em = /^(\*|_)(?=\S)([\s\S]*?\S)\1(?!\1)/.exec(rest);
74 if (em && (em[1] === "*" || (!/\w/.test(input[i - 1] ?? "") && !/\w/.test(input[i + em[0].length] ?? "")))) {
75 flush();
76 walk(em[2]!, { ...marks, italic: true });
77 i += em[0].length;
78 continue;
79 }
80 const strike = /^~~(?=\S)([\s\S]*?\S)~~/.exec(rest);
81 if (strike) {
82 flush();
83 walk(strike[1]!, marks);
84 i += strike[0].length;
85 continue;
86 }
87 const tag = /^<\/?[A-Za-z][^>]*>/.exec(rest);
88 if (tag) {
89 plain += /^<br\s*\/?>$/i.test(tag[0]) ? " " : "";
90 i += tag[0].length;
91 continue;
92 }
93 plain += ch;
94 i += 1;
95 }
96 flush();
97 };
98 walk(text.replace(/\s+/g, " ").trim(), {});
99 return spans;
100}
101
102/** A table row's cells, without the outer pipes. */
103function cells(line: string): string[] {
104 let row = line.trim();
105 if (row.startsWith("|")) row = row.slice(1);
106 if (row.endsWith("|") && !row.endsWith("\\|")) row = row.slice(0, -1);
107 const out: string[] = [];
108 let cell = "";
109 for (let i = 0; i < row.length; i++) {
110 if (row[i] === "\\" && row[i + 1] === "|") {
111 cell += "|";
112 i++;
113 } else if (row[i] === "|") {
114 out.push(cell.trim());
115 cell = "";
116 } else cell += row[i];
117 }
118 out.push(cell.trim());
119 return out;
120}
121
122const DIVIDER = /^\s*\|?\s*:?-{2,}:?\s*(\|\s*:?-{2,}:?\s*)*\|?\s*$/;
123const ITEM = /^(\s*)([-*+]|\d{1,9}[.)])\s+(.*)$/;
124
125/** Markdown as blocks. */
126export function parseBlocks(markdown: string): Block[] {
127 const lines = String(markdown ?? "").replace(/\r\n?/g, "\n").replace(/\t/g, " ").split("\n");
128 const blocks: Block[] = [];
129 let paragraph: string[] = [];
130 const endParagraph = () => {
131 if (paragraph.length) blocks.push({ kind: "paragraph", spans: parseSpans(paragraph.join(" ")) });
132 paragraph = [];
133 };
134 for (let i = 0; i < lines.length; i++) {
135 const line = lines[i]!;
136 const fence = /^\s*(```+|~~~+)\s*([\w+-]*)/.exec(line);
137 if (fence) {
138 endParagraph();
139 const body: string[] = [];
140 i++;
141 while (i < lines.length && !lines[i]!.trim().startsWith(fence[1]!)) body.push(lines[i++]!);
142 // A Mermaid chart can't be drawn into a file: its source is kept, as code.
143 blocks.push({ kind: "code", text: body.join("\n") });
144 continue;
145 }
146 if (!line.trim()) {
147 endParagraph();
148 continue;
149 }
150 const heading = /^\s{0,3}(#{1,6})\s+(.*?)\s*#*\s*$/.exec(line);
151 if (heading) {
152 endParagraph();
153 blocks.push({ kind: "heading", level: Math.min(3, heading[1]!.length) as 1 | 2 | 3, spans: parseSpans(heading[2]!) });
154 continue;
155 }
156 if (/^\s{0,3}([-*_])(\s*\1){2,}\s*$/.test(line)) {
157 endParagraph();
158 blocks.push({ kind: "rule" });
159 continue;
160 }
161 if (line.includes("|") && i + 1 < lines.length && DIVIDER.test(lines[i + 1]!)) {
162 endParagraph();
163 const header = cells(line).map(parseSpans);
164 const rows: Span[][][] = [];
165 i += 2;
166 while (i < lines.length && lines[i]!.includes("|") && lines[i]!.trim()) rows.push(cells(lines[i++]!).map(parseSpans));
167 i--;
168 blocks.push({ kind: "table", header, rows });
169 continue;
170 }
171 const quote = /^\s{0,3}>\s?(.*)$/.exec(line);
172 if (quote) {
173 endParagraph();
174 const body = [quote[1]!];
175 while (i + 1 < lines.length && /^\s{0,3}>/.test(lines[i + 1]!)) body.push(lines[++i]!.replace(/^\s{0,3}>\s?/, ""));
176 // GitHub's alerts (> [!NOTE]) read as their text.
177 const text = body.join(" ").replace(/^\[!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)\]\s*/i, (_, kind: string) => `${kind[0]!.toUpperCase()}${kind.slice(1).toLowerCase()}: `);
178 blocks.push({ kind: "quote", spans: parseSpans(text) });
179 continue;
180 }
181 const item = ITEM.exec(line);
182 if (item) {
183 endParagraph();
184 const marker = item[2]!;
185 const ordered = /\d/.test(marker);
186 let text = item[3]!;
187 // Lazy continuation lines belong to the item.
188 while (i + 1 < lines.length && lines[i + 1]!.trim() && !ITEM.test(lines[i + 1]!) && /^\s{2,}\S/.test(lines[i + 1]!) && !/^\s*(```|~~~|#|>|\|)/.test(lines[i + 1]!)) {
189 text += ` ${lines[++i]!.trim()}`;
190 }
191 const task = /^\[([ xX])\]\s+(.*)$/.exec(text);
192 if (task) text = `${task[1] === " " ? "[ ]" : "[x]"} ${task[2]}`;
193 blocks.push({ kind: "item", ordered, number: ordered ? Number.parseInt(marker, 10) : 0, depth: Math.min(3, Math.floor(item[1]!.length / 2)), spans: parseSpans(text) });
194 continue;
195 }
196 paragraph.push(line.trim());
197 }
198 endParagraph();
199 return blocks;
200}
201
202/** A span list's plain text. */
203export function spanText(spans: Span[]): string {
204 return spans.map((s) => s.text).join("");
205}