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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.1import assert from "node:assert/strict";
2import { test } from "node:test";
3
4import { parseBlocks, parseSpans } from "./file-markdown.ts";
5import { base64, csv, fileName, makeFile, previewTable } from "./files.ts";
6import { cellValue, columnName, crc32, markdownDocx, sheetNames, workbook } from "./ooxml.ts";
7import { markdownPdf, winAnsi } from "./pdf.ts";
8
9const latin1 = (bytes: Uint8Array) => String.fromCharCode(...bytes);
10
11/** A stored zip's entries, each checked against its CRC. */
12function unzip(bytes: Uint8Array): Map<string, string> {
13 const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
14 let end = bytes.length - 22;
15 while (end >= 0 && view.getUint32(end, true) !== 0x06054b50) end--;
16 assert.ok(end >= 0, "has an end of central directory");
17 const count = view.getUint16(end + 10, true);
18 let at = view.getUint32(end + 16, true);
19 const out = new Map<string, string>();
20 for (let i = 0; i < count; i++) {
21 assert.equal(view.getUint32(at, true), 0x02014b50);
22 const crc = view.getUint32(at + 16, true);
23 const size = view.getUint32(at + 20, true);
24 const nameLength = view.getUint16(at + 28, true);
25 const local = view.getUint32(at + 42, true);
26 const name = new TextDecoder().decode(bytes.subarray(at + 46, at + 46 + nameLength));
27 assert.equal(view.getUint32(local, true), 0x04034b50);
28 const start = local + 30 + view.getUint16(local + 26, true) + view.getUint16(local + 28, true);
29 const data = bytes.subarray(start, start + size);
30 assert.equal(crc32(data), crc, `${name}'s CRC`);
31 out.set(name, new TextDecoder().decode(data));
32 at += 46 + nameLength;
33 }
34 return out;
35}
36
37const REPORT = `# Quarterly report
38
39Revenue grew **12%** to *$1.2M*. See [the dashboard](https://example.com/q3) and \`acme/web\`.
40
41## Highlights
42
43- Shipped the merge queue
44- Cut p95 latency
45 1. In the API
462. Ordered too
47
48> [!NOTE]
49> Numbers are unaudited.
50
51| Region | Revenue | Growth |
52| --- | ---: | --- |
53| North | 400,000 | 10% |
54| South | 800,000 | 13% |
55
56\`\`\`ts
57const total = north + south;
58\`\`\`
59
60---
61
62Done.`;
63
64test("Markdown reads into the blocks a file needs", () => {
65 const blocks = parseBlocks(REPORT);
66 assert.deepEqual(
67 blocks.map((b) => b.kind),
68 ["heading", "paragraph", "heading", "item", "item", "item", "item", "quote", "table", "code", "rule", "paragraph"],
69 );
70 const table = blocks.find((b) => b.kind === "table");
71 assert.ok(table && table.kind === "table");
72 assert.equal(table.rows.length, 2);
73 const quote = blocks.find((b) => b.kind === "quote");
74 assert.ok(quote && quote.kind === "quote");
75 assert.match(quote.spans.map((s) => s.text).join(""), /^Note: Numbers are unaudited/);
76 assert.deepEqual(parseSpans("a **b** _c_ `d` [e](https://x.y) snake_case_word"), [
77 { text: "a " },
78 { text: "b", bold: true },
79 { text: " " },
80 { text: "c", italic: true },
81 { text: " " },
82 { text: "d", code: true },
83 { text: " " },
84 { text: "e", href: "https://x.y" },
85 { text: " snake_case_word" },
86 ]);
87});
88
89test("a PDF is well formed: every object where the cross-reference table says, pages counted, links annotated", () => {
90 const { bytes, pages, truncated } = markdownPdf("Quarterly report", REPORT);
91 const text = latin1(bytes);
92 assert.ok(text.startsWith("%PDF-1.4\n"));
93 assert.ok(text.endsWith("%%EOF\n"));
94 assert.equal(pages, 1);
95 assert.equal(truncated, false);
96 const xref = Number(/startxref\n(\d+)\n/.exec(text)![1]);
97 assert.ok(text.slice(xref).startsWith("xref\n"));
98 const entries = [...text.slice(xref).matchAll(/^(\d{10}) 00000 n $/gm)].map((m) => Number(m[1]));
99 entries.forEach((offset, i) => assert.ok(text.slice(offset).startsWith(`${i + 1} 0 obj\n`), `object ${i + 1} is where the table says`));
100 assert.match(text, /\/Count 1 >>/);
101 assert.match(text, /\(Quarterly report\) Tj/);
102 assert.match(text, /\(Region\) Tj/);
103 assert.match(text, /\/URI \(https:\/\/example.com\/q3\)/);
104 for (const m of text.matchAll(/<< \/Length (\d+) >>\nstream\n/g)) {
105 const start = m.index! + m[0].length;
106 assert.ok(text.slice(start + Number(m[1])).startsWith("\nendstream"), "each stream is as long as it says");
107 }
108 // The title isn't repeated when the Markdown starts with it.
109 assert.equal(text.match(/\(Quarterly report\) Tj/g)!.length, 1);
110});
111
112test("a long PDF breaks across pages and numbers them", () => {
113 const long = Array.from({ length: 200 }, (_, i) => `Paragraph ${i + 1}: ${"words ".repeat(40)}`).join("\n\n");
114 const { bytes, pages } = markdownPdf("Long", long);
115 assert.ok(pages > 10);
116 const text = latin1(bytes);
117 assert.match(text, new RegExp(`/Count ${pages} >>`));
118 assert.match(text, new RegExp(`\\(${pages} of ${pages}\\) Tj`));
119});
120
121test("PDF text is Windows-1252: curly quotes and dashes kept, accents folded, emoji dropped", () => {
122 assert.deepEqual(winAnsi("“a” – b"), [0x93, 0x61, 0x94, 0x20, 0x96, 0x20, 0x62]);
123 assert.deepEqual(winAnsi("é"), [0xe9]);
124 assert.deepEqual(winAnsi("ő"), [0x6f]);
125 assert.deepEqual(winAnsi("ok 🚀"), [0x6f, 0x6b, 0x20]);
126 assert.deepEqual(winAnsi("中"), [0x3f]);
127});
128
129test("a Word document is a valid package with the text, styles and links", () => {
130 const files = unzip(markdownDocx("Quarterly report", REPORT, new Date("2026-10-10T12:00:00Z")));
131 assert.deepEqual([...files.keys()].sort(), ["[Content_Types].xml", "_rels/.rels", "docProps/core.xml", "word/_rels/document.xml.rels", "word/document.xml", "word/styles.xml"]);
132 const document = files.get("word/document.xml")!;
133 assert.match(document, /<w:pStyle w:val="Heading1"\/><\/w:pPr><w:r><w:t xml:space="preserve">Quarterly report<\/w:t>/);
134 assert.match(document, /<w:b\/><\/w:rPr><w:t xml:space="preserve">12%<\/w:t>/);
135 assert.match(document, /<w:hyperlink r:id="rIdLink1">/);
136 assert.match(document, /<w:tbl>/);
137 assert.match(files.get("word/_rels/document.xml.rels")!, /Target="https:\/\/example.com\/q3" TargetMode="External"/);
138 assert.match(files.get("docProps/core.xml")!, /<dc:title>Quarterly report<\/dc:title>/);
139 // Text is escaped.
140 const escaped = unzip(markdownDocx("x", "a < b & c"));
141 assert.match(escaped.get("word/document.xml")!, /a &lt; b &amp; c/);
142});
143
144test("a workbook keeps numbers as numbers, codes as text, and a bold frozen header", () => {
145 const files = unzip(
146 workbook("Sales", [
147 { name: "Q3: by region", rows: [["Region", "Revenue", "Zip"], ["North", 400000, "02139"], ["South", "800000.5", null]] },
148 { name: "Q3: by region", rows: [["a"]] },
149 ]),
150 );
151 assert.match(files.get("xl/workbook.xml")!, /<sheet name="Q3 by region" sheetId="1"/);
152 assert.match(files.get("xl/workbook.xml")!, /<sheet name="Q3 by region 2" sheetId="2"/);
153 const sheet = files.get("xl/worksheets/sheet1.xml")!;
154 assert.match(sheet, /<c r="A1" s="1" t="inlineStr"><is><t xml:space="preserve">Region<\/t>/);
155 assert.match(sheet, /<c r="B2"><v>400000<\/v><\/c>/);
156 assert.match(sheet, /<c r="C2" t="inlineStr"><is><t xml:space="preserve">02139<\/t>/);
157 assert.match(sheet, /<c r="B3"><v>800000.5<\/v><\/c>/);
158 assert.match(sheet, /state="frozen"/);
159 assert.equal(columnName(0), "A");
160 assert.equal(columnName(25), "Z");
161 assert.equal(columnName(26), "AA");
162 assert.equal(columnName(701), "ZZ");
163 assert.deepEqual(cellValue("007"), { kind: "text", value: "007" });
164 assert.deepEqual(sheetNames(["", "a/b", "x".repeat(40)]), ["Sheet1", "a b", "x".repeat(31)]);
165});
166
167test("CSV quotes what it must, and starts with a byte-order mark", () => {
168 assert.equal(csv([["a", "b,c"], ['say "hi"', 3], [null, "line\nbreak"]]), 'a,"b,c"\r\n"say ""hi""",3\r\n,"line\nbreak"\r\n');
169});
170
171test("make_file's checks: formats it can't write, missing content, a CSV of two sheets", () => {
172 const slides = makeFile({ format: "pptx", title: "Deck" });
173 assert.equal(slides.ok, false);
174 assert.match(!slides.ok ? slides.message : "", /Slide decks and images aren't available yet/);
175 assert.equal(makeFile({ format: "pdf", title: "x", content: " " }).ok, false);
176 assert.equal(makeFile({ format: "pdf", title: "", content: "x" }).ok, false);
177 const two = makeFile({ format: "csv", title: "x", sheets: [{ rows: [["a"]] }, { rows: [["b"]] }] });
178 assert.match(!two.ok ? two.message : "", /one sheet/);
179 const pdf = makeFile({ format: ".PDF", title: "Q3/Q4 report.pdf", content: "Hello" });
180 assert.ok(pdf.ok);
181 assert.equal(pdf.ok && pdf.file.name, "Q3 Q4 report.pdf");
182 assert.equal(pdf.ok && pdf.file.content_type, "application/pdf");
183 assert.equal(pdf.ok && pdf.file.summary, "1 page");
184 const sheet = makeFile({ format: "xlsx", title: "Sales", sheets: [{ name: "S", rows: [["a", "b"], [1, 2], [3, 4]] }] });
185 assert.equal(sheet.ok && sheet.file.summary, "2 rows");
186 assert.equal(fileName("", "md"), "file.md");
187});
188
The artifacts service is services/artifacts, the Worker g1t-artifacts, bound as ARTIFACTS by the API, the site and the agents; its live rooms move to it with a Durable Object transfer from g1t-docs-service, and its database, bucket, indexes and queue keep their names. The git store's binding and settings are GITSTORE, its ops scripts gitstore-*, and workflow run artifacts keep their compatible API under run_artifacts modules. The deploy tool puts a Worker that has never deployed before the Workers in its stage that bind to it, and the deploy guide gives the cutover runbook.189test("a spreadsheet's preview in its doc, and base64 for the trip to the artifacts service", () => {
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.190 const rows = [["Name", "Total"], ...Array.from({ length: 25 }, (_, i) => [`r${i}`, i])];
191 const preview = previewTable({ name: "S", rows });
192 assert.match(preview, /^\| Name \| Total \|\n\| --- \| --- \|\n\| r0 \| 0 \|/);
193 assert.match(preview, /_First 20 of 25 rows._$/);
194 const bytes = new Uint8Array(100_000).map((_, i) => i % 256);
195 assert.equal(Buffer.from(base64(bytes), "base64").equals(Buffer.from(bytes)), true);
196});