/* Animated dev-loop terminal — the hero artifact.
A continuous SDLC loop: ticket → plan → code → tests → review →
staging deploy → log monitoring → bug found → fix → prod promote.
Each step renders realistic dev tooling output (not raw JSON). */
const { useState, useEffect, useRef } = React;
/* ============================================================
SCRIPT — the loop
============================================================ */
const SCRIPT = [
{ t: "input", text: "Ship feature FT-2487 — passwordless magic-link login" },
{ t: "think", text: "Reading ticket + acceptance criteria…" },
{ t: "tool", name: "load_ticket", args: "id=FT-2487", duration: 650, kind: "ticket",
data: {
id: "FT-2487", title: "Magic-link auth",
owner: "growth", priority: "High", estimate: "3d",
criteria: [
"Email magic link · 15m TTL · single-use",
"Rate-limit 3/hr per email address",
"Fallback to SSO for enterprise tenants",
"Audit log entry per attempt",
],
},
},
{ t: "think", text: "Drafting plan against current auth architecture…" },
{ t: "tool", name: "plan_changes", args: "scope=auth.passwordless", duration: 800, kind: "plan",
data: {
version: "v1", risk: "low", filesTouched: 11,
steps: [
["MagicLink model + migration", "db/schema.prisma"],
["Token gen + verify utility", "src/auth/token.ts"],
["POST /api/auth/magic-link", "src/api/auth/route.ts"],
["Email template + send", "src/lib/email/magic.tsx"],
["Login UI · magic-link tab", "src/app/login/page.tsx"],
["Rate limiter middleware", "src/middleware/rate.ts"],
],
},
},
{ t: "tool", name: "write_code", args: "step=2 src/auth/token.ts", duration: 1100, kind: "code",
data: {
file: "src/auth/token.ts",
lines: [
'import { nanoid } from "nanoid";',
'import { redis } from "@/lib/redis";',
'import { sendMagicLinkEmail } from "@/lib/email/magic";',
'',
'export async function issueMagicLink(email: string) {',
' const token = nanoid(32);',
' await redis.set(`ml:${token}`, email, "EX", 900);',
' await sendMagicLinkEmail(email, token);',
' return { sent: true, ttl: 900 };',
'}',
],
footer: "+384 / −52 across 11 files · standards v3.2: passed",
},
},
{ t: "tool", name: "run_tests", args: "suite=unit+e2e", duration: 850, kind: "tests",
data: {
lines: [
{ lvl: "pass", text: "src/auth/__tests__/token.test.ts (32 ms)" },
{ lvl: "pass", text: "src/api/auth/__tests__/magic-link.test.ts (118 ms)" },
{ lvl: "pass", text: "src/middleware/__tests__/rate.test.ts (24 ms)" },
{ lvl: "pass", text: "e2e/login.spec.ts (4.4 s)" },
],
summary: [
["Tests", "99 passed, 99 total"],
["Coverage", "94.2 % statements · 91.0 % branches"],
["Time", "5.62 s"],
],
},
},
{ t: "tool", name: "code_review", args: "diff=d_2487 standards=v3.2", duration: 650, kind: "review",
data: {
title: "PR #2487 · auto-review",
lines: [
{ lvl: "ok", name: "Standards check", note: "passing" },
{ lvl: "ok", name: "Security scan", note: "no findings" },
{ lvl: "ok", name: "Coverage gate (≥ 90%)", note: "94.2 %" },
{ lvl: "warn", name: "token.ts : 18", note: "rate-limit at issue path" },
{ lvl: "warn", name: "rate.ts : 7", note: "reuse shared limiter" },
],
verdict: "9/10 · 0 blocking · 2 suggestions",
},
},
{ t: "decide", badge: "DEPLOYED → STAGING",
text: "Live on staging.app — watching logs for anomalies." },
{ t: "tool", name: "monitor_logs", args: "env=staging window=10m", duration: 900, kind: "logs",
data: {
lines: [
{ ts: "17:42:01", env: "staging", msg: "POST /api/auth/magic-link · 201 · 12 ms" },
{ ts: "17:42:08", env: "staging", msg: "GET /auth/verify?t=*** · 200 · 8 ms" },
{ ts: "17:42:14", env: "staging", msg: "GET /auth/verify?t=*** · 500 · 14 ms", lvl: "err" },
{ sub: "TypeError: Cannot read property 'email' of null", lvl: "err" },
{ sub: "at verifyToken (src/auth/verify.ts:42:18)", lvl: "err-dim" },
{ ts: "17:42:14", env: "agent ", msg: "alert.fire · error_spike · threshold=1", lvl: "alert" },
],
},
},
{ t: "think", text: "Anomaly detected. Tracing root cause…" },
{ t: "tool", name: "patch_and_verify", args: "err=e_88x ticket=FT-2487", duration: 800, kind: "diff",
data: {
file: "src/auth/verify.ts", stat: "+3 / −1",
lines: [
{ k: "hunk", text: "@@ -39,7 +39,9 @@ export async function verifyToken(t) {" },
{ k: "ctx", text: " const cached = await redis.get(`ml:${t}`);" },
{ k: "rem", text: " return { email: cached.email, ok: true };" },
{ k: "add", text: ' if (!cached) return { ok: false, reason: "expired" };' },
{ k: "add", text: " return { email: cached, ok: true };" },
{ k: "ctx", text: "}" },
],
footer: "✓ token.test.ts · ✓ login.spec.ts · re-deployed",
},
},
{ t: "decide", badge: "PROMOTED → PROD",
text: "Feature live · 12 m end-to-end. Pulling next ticket — loop closes." },
];
const AGENT_TYPE_MS = 16;
const STEP_GAP_MS = 320;
/* ============================================================
Syntax highlighter — single-pass tokenizer
Order in the alternation is precedence: comments / strings win
over their inner content, so digits inside strings stay quoted.
============================================================ */
const TOKEN_RE = /(\/\/[^\n]*)|("[^"]*"|`[^`]*`|'[^']*')|\b(export|import|from|async|await|function|const|let|var|return|if|else|true|false|null|undefined|new|class|extends|throw|try|catch|for|of|in)\b|\b(string|number|boolean|void|any)\b|\b(\d+(?:\.\d+)?)\b|\b([a-zA-Z_$][\w$]*)(?=\s*\()/g;
function tokenize(line) {
const out = [];
let last = 0;
let key = 0;
let m;
TOKEN_RE.lastIndex = 0;
while ((m = TOKEN_RE.exec(line)) !== null) {
if (m.index > last) {
out.push({ k: key++, cls: "", v: line.slice(last, m.index) });
}
let cls = "";
if (m[1] !== undefined) cls = "c-cm";
else if (m[2] !== undefined) cls = "c-s";
else if (m[3] !== undefined) cls = "c-k";
else if (m[4] !== undefined) cls = "c-t";
else if (m[5] !== undefined) cls = "c-n";
else if (m[6] !== undefined) cls = "c-fn";
out.push({ k: key++, cls, v: m[0] });
last = TOKEN_RE.lastIndex;
}
if (last < line.length) {
out.push({ k: key++, cls: "", v: line.slice(last) });
}
return out;
}
/* ============================================================
Per-kind result renderers
============================================================ */
function TicketCard({ data }) {
return (
{data.id}
{data.title}
{data.priority} · {data.owner} · est {data.estimate}
{data.criteria.map((c, i) => (
- ✓{c}
))}
);
}
function PlanList({ data }) {
return (
PLAN {data.version}
{data.steps.length} steps · {data.filesTouched} files
risk: {data.risk}
{data.steps.map(([name, file], i) => (
-
{String(i + 1).padStart(2, "0")}
{name}
{file}
))}
);
}
function CodeBlock({ data }) {
return (
FILE
{data.file}
{data.lines.map((line, i) => (
{i + 1}
{line === ""
? "\u00A0"
: tokenize(line).map((tk) => (
{tk.v}
))}
))}
{data.footer}
);
}
function TestOutput({ data }) {
return (
TESTS
vitest · 4 suites
{data.lines.map((l, i) => (
{l.lvl === "pass" ? "PASS" : l.lvl.toUpperCase()}
{l.text}
))}
{data.summary.map(([k, v], i) => (
{k}{v}
))}
);
}
function ReviewOutput({ data }) {
return (
REVIEW
{data.title}
{data.lines.map((l, i) => (
-
{l.lvl === "ok" ? "✓" : "!"}
{l.name}
{l.note}
))}
{data.verdict}
);
}
function LogTail({ data }) {
return (
LOGS
tail · staging · 10 m window
{data.lines.map((l, i) => {
if (l.sub) return
↳ {l.sub}
;
return (
{l.ts}
[{l.env}]
{l.msg}
);
})}
);
}
function DiffBlock({ data }) {
return (
DIFF
{data.file}
{data.stat}
{data.lines.map((l, i) => (
{l.k === "add" ? "+" : l.k === "rem" ? "−" : l.k === "hunk" ? "@" : " "}
{l.text}
))}
{data.footer}
);
}
const RENDERERS = {
ticket: TicketCard,
plan: PlanList,
code: CodeBlock,
tests: TestOutput,
review: ReviewOutput,
logs: LogTail,
diff: DiffBlock,
};
/* ============================================================
Terminal chrome
============================================================ */
function TerminalChrome({ children, kbd, status }) {
return (
~/framework
/
agent --ship FT-2487
{status}
{children}
↵ {kbd}
23 ms · plan · code · test · ship · monitor
);
}
/* ============================================================
Typewriter
============================================================ */
function Typewriter({ text, speed = AGENT_TYPE_MS, onDone, className }) {
const [out, setOut] = useState("");
const idx = useRef(0);
useEffect(() => {
setOut("");
idx.current = 0;
let cancelled = false;
function tick() {
if (cancelled) return;
if (idx.current >= text.length) { onDone && onDone(); return; }
idx.current += 1;
setOut(text.slice(0, idx.current));
setTimeout(tick, speed + (Math.random() * 16 - 8));
}
tick();
return () => { cancelled = true; };
}, [text]);
return {out};
}
/* ============================================================
Tool block
============================================================ */
function ToolCallBlock({ step, onDone }) {
const [phase, setPhase] = useState("calling");
useEffect(() => {
let alive = true;
const t1 = setTimeout(() => alive && setPhase("running"), 280);
const t2 = setTimeout(() => {
if (!alive) return;
setPhase("done");
onDone && onDone();
}, 280 + step.duration);
return () => { alive = false; clearTimeout(t1); clearTimeout(t2); };
}, []);
const Renderer = RENDERERS[step.kind];
return (
{phase === "done" ? "✓" : }
{step.name}
({step.args})
{phase === "calling" ? "calling" : phase === "running" ? "running" : "ok"}
{phase === "done" && Renderer && (
)}
);
}
/* ============================================================
HeroAgent root
============================================================ */
function HeroAgent() {
const [step, setStep] = useState(0);
const [tick, setTick] = useState(0);
const logRef = useRef(null);
// auto-scroll to bottom on every render
useEffect(() => {
const el = logRef.current;
if (!el) return;
const id = setTimeout(() => {
el.scrollTo({ top: el.scrollHeight, behavior: "smooth" });
}, 80);
return () => clearTimeout(id);
});
const nextStep = () => {
setTimeout(() => {
setStep(s => {
if (s + 1 >= SCRIPT.length) {
setTimeout(() => {
setStep(0);
setTick(t => t + 1);
}, 4800);
return s + 1;
}
return s + 1;
});
}, STEP_GAP_MS);
};
const visible = SCRIPT.slice(0, step + 1);
// status word changes as the loop progresses
const statusFor = (s) => {
if (s >= SCRIPT.length - 1) return "shipped";
if (s >= 11) return "patching";
if (s >= 8) return "monitoring";
if (s >= 4) return "building";
return "planning";
};
return (
{visible.map((s, i) => {
const isLast = i === visible.length - 1;
const advance = isLast ? nextStep : undefined;
if (s.t === "input") {
return (
›
{isLast && }
);
}
if (s.t === "think") {
return (
⌁
);
}
if (s.t === "tool") {
return
;
}
if (s.t === "decide") {
return (
);
}
return null;
})}