// @effect-diagnostics nodeBuiltinImport:off globalTimers:off globalDate:off - This host-side fixture creates an isolated local T3 environment.
import * as NodeChildProcess from "node:child_process";
import * as NodeFSP from "node:fs/promises";
import * as NodePath from "node:path";
import * as NodeSqlite from "node:sqlite";
import * as NodeUtil from "node:util";
const execFile = NodeUtil.promisify(NodeChildProcess.execFile);
export const SHOWCASE_PROJECT_ID = "t3code";
export const SHOWCASE_THREAD_ID = "remote-command-center";
export const SHOWCASE_TERMINAL_ID = "term-1";
export const SHOWCASE_SCENES = ["threads", "thread", "terminal", "review", "environments"] as const;
export type ShowcaseScene = (typeof SHOWCASE_SCENES)[number];
const PROJECTOR_NAMES = [
"projection.projects",
"projection.threads",
"projection.thread-messages",
"projection.thread-proposed-plans",
"projection.thread-activities",
"projection.thread-sessions",
"projection.thread-turns",
"projection.checkpoints",
"projection.pending-approvals",
] as const;
const MODEL_SELECTION = JSON.stringify({ instanceId: "codex", model: "gpt-5.4" });
const PROJECT_SCRIPTS = JSON.stringify([
{
id: "dev",
name: "Dev",
command: "pnpm dev",
icon: "play",
runOnWorktreeCreate: false,
},
{
id: "test",
name: "Tests",
command: "pnpm test",
icon: "test",
runOnWorktreeCreate: false,
},
]);
const SHOWCASE_TERMINAL_PROMPT =
"\u001b[1;32m→\u001b[0m \u001b[1;36mt3code\u001b[0m \u001b[1;34mgit:(\u001b[1;31mfeat/remote-command-center\u001b[1;34m)\u001b[0m \u001b[1;33m✗\u001b[0m ";
// A dev-server startup mirroring the web settings' terminal font preview:
// zsh-style prompt, brand line, addresses, the thread's 612-test summary,
// and a READY badge, so the scene exercises bold, dim, underline, the six
// accent colors, and a background cell.
export const SHOWCASE_TERMINAL_BUFFER = [
`${SHOWCASE_TERMINAL_PROMPT}vpr dev`,
"",
" \u001b[1;32mVITE\u001b[0m \u001b[32mv7.1.1\u001b[0m \u001b[2mready in\u001b[0m \u001b[1m1.24s\u001b[0m",
"",
" \u001b[32m→\u001b[0m \u001b[2mLocal:\u001b[0m \u001b[4;36mhttp://127.0.0.1:5173/\u001b[0m",
" \u001b[32m→\u001b[0m \u001b[2mNetwork:\u001b[0m \u001b[4;36mhttp://192.168.1.24:5173/\u001b[0m",
" \u001b[32m→\u001b[0m \u001b[2mProject:\u001b[0m \u001b[1mt3code\u001b[0m \u001b[2m— ~/Code/t3code\u001b[0m",
"",
" \u001b[32m✓ 612 passed\u001b[0m \u001b[33m△ 2 warnings\u001b[0m \u001b[31m✗ 0 failed\u001b[0m",
"",
" \u001b[42;30m READY \u001b[0m \u001b[2mwatching for changes — press\u001b[0m \u001b[1mq\u001b[0m \u001b[2mto quit\u001b[0m",
"",
SHOWCASE_TERMINAL_PROMPT,
].join("\r\n");
const BASE_ENVIRONMENT_PRESENCE = `export function environmentLabel(count: number): string {
return \`${"${count}"} environments\`;
}
`;
const UPDATED_ENVIRONMENT_PRESENCE = `const PULSE = ["✦", "✧", "·", "✧"] as const;
export function environmentLabel(connected: number, total: number, frame: number): string {
const pulse = PULSE[frame % PULSE.length];
return \`${"${pulse} ${connected}/${total}"} ready\`;
}
`;
const REMOTE_HANDOFF_CARD = `import { View, Text } from "react-native";
export function RemoteHandoffCard(props: { machine: string; latencyMs: number }) {
return (
Ready on {props.machine}
Handoff in {props.latencyMs}ms
);
}
`;
const PROJECT_FAVICONS = {
t3code: ``,
react: ``,
linux: ``,
} as const;
export const SHOWCASE_PROJECTS = [
{
id: "t3code",
title: "T3 Code",
directory: "t3code",
repositoryUrl: "https://github.com/pingdotgg/t3code.git",
favicon: PROJECT_FAVICONS.t3code,
},
{
id: "react",
title: "React",
directory: "react",
repositoryUrl: "https://github.com/facebook/react.git",
favicon: PROJECT_FAVICONS.react,
},
{
id: "linux",
title: "Linux",
directory: "linux",
repositoryUrl: "https://github.com/torvalds/linux.git",
favicon: PROJECT_FAVICONS.linux,
},
] as const;
export const SHOWCASE_ENVIRONMENTS = [
{
id: "moonbase-terminal",
label: "Moonbase Terminal",
projectIds: ["t3code"],
},
{
id: "suspense-station",
label: "Suspense Station",
projectIds: ["react"],
},
{
id: "kernel-cabin",
label: "Kernel Cabin",
projectIds: ["linux"],
},
] as const;
export const SHOWCASE_THREADS = [
{
id: SHOWCASE_THREAD_ID,
projectId: "t3code",
title: "Make remote coding feel local ✦",
branch: "feat/remote-command-center",
minutesAgo: 3,
request:
"Give T3 Code a remote-first command center. Make three machines feel one tap away, keep agent work in sync, and make every handoff feel instant.",
response:
"T3 Code now treats every machine like it is right here in the room. ✦\n\n- Moonbase, Suspense Station, and Kernel Cabin stay live together\n- Terminal state follows you without losing a single line\n- Agent work remains perfectly in sync across devices\n- Handoffs land before your train of thought can wander\n\nI also ran the changed workspace: **612 tests passed**.",
},
{
id: "pocket-command-center",
projectId: "t3code",
title: "Put the command center in your pocket",
branch: "feat/pocket-command-center",
minutesAgo: 21,
state: "approval" as const,
request: "Make switching between desktop, phone, and tablet feel like one continuous session.",
response:
"The handoff flow preserves the selected thread, terminal buffer, and working diff. The final motion treatment is ready for approval.",
},
{
id: "buttery-suspense",
projectId: "react",
title: "Make Suspense transitions buttery",
branch: "perf/buttery-suspense",
minutesAgo: 12,
state: "working" as const,
request:
"Trace the last few dropped frames in nested Suspense transitions and make them disappear.",
response: null,
},
{
id: "hydration-haikus",
projectId: "react",
title: "Turn hydration warnings into haikus",
branch: "dev/hydration-haikus",
minutesAgo: 44,
request:
"Keep hydration errors precise, but make the development copy unexpectedly delightful.",
response:
"The diagnostics still lead with the exact mismatch and component stack. A tiny optional haiku now closes the expanded explanation.",
snoozeMinutes: 90,
},
{
id: "beautiful-boot",
projectId: "linux",
title: "Make boot logs oddly beautiful",
branch: "feat/beautiful-boot",
minutesAgo: 34,
state: "plan" as const,
request:
"Design a clearer boot timeline that remains useful over serial and never hides kernel detail.",
response:
"The plan groups milestones without changing the underlying log stream, preserves plain-text output, and adds zero work to the hot path.",
},
{
id: "patient-penguins",
projectId: "linux",
title: "Teach penguins to wait patiently",
branch: "feat/patient-penguins",
minutesAgo: 52,
request: "Make delayed work easier to follow without adding noise to the scheduler trace.",
response:
"Delayed work now carries a concise reason through the trace, so the wait is legible without changing scheduling behavior.",
snoozeMinutes: 8 * 60,
},
// Finished work, settled by hand: the list keeps it as a receded tail so
// the active block above reads as everything still in flight. The active
// block stays small enough that the settled tail begins above the fold —
// a store screenshot has to show that history exists, not just imply it.
{
id: "handoff-haptics",
projectId: "t3code",
title: "Tune the handoff haptics",
branch: "feat/handoff-haptics",
minutesAgo: 5 * 60,
settled: true,
request: "Give the desktop-to-phone handoff a haptic that lands with the animation.",
response:
"The handoff now taps once as the thread lands and stays silent on failure, so the phone never celebrates a handoff that did not happen.",
},
{
id: "streaming-shell",
projectId: "react",
title: "Stream the shell before the data",
branch: "feat/streaming-shell",
minutesAgo: 28 * 60,
settled: true,
request: "Get the app shell painted before any data request resolves.",
response:
"The shell now flushes on first byte and the data boundaries hydrate underneath it, so the first paint no longer waits on the slowest query.",
},
{
id: "quieter-oom",
projectId: "linux",
title: "Make the OOM killer explain itself",
branch: "feat/quieter-oom",
minutesAgo: 2 * 24 * 60,
settled: true,
request: "Make out-of-memory kills legible without adding a single allocation to the hot path.",
response:
"Kills now report the winning heuristic and the runner-up alongside the usual dump, assembled entirely from data the path already had.",
},
] as const;
function minutesBefore(now: number, minutes: number): string {
return new Date(now - minutes * 60_000).toISOString();
}
async function runGit(workspaceRoot: string, args: ReadonlyArray): Promise {
await execFile("git", [...args], {
cwd: workspaceRoot,
env: {
...process.env,
GIT_AUTHOR_NAME: "Alex Rivera",
GIT_AUTHOR_EMAIL: "alex@lumen.test",
GIT_COMMITTER_NAME: "Alex Rivera",
GIT_COMMITTER_EMAIL: "alex@lumen.test",
},
});
}
async function initializeRepository(input: {
readonly workspaceRoot: string;
readonly repositoryUrl: string;
readonly commitMessage: string;
}): Promise {
await runGit(input.workspaceRoot, ["init", "-b", "main"]);
await runGit(input.workspaceRoot, ["remote", "add", "origin", input.repositoryUrl]);
await runGit(input.workspaceRoot, ["add", "."]);
await runGit(input.workspaceRoot, ["commit", "-m", input.commitMessage]);
}
async function seedT3CodeWorkspace(workspaceRoot: string): Promise {
await NodeFSP.mkdir(NodePath.join(workspaceRoot, "apps/mobile/src/features/home"), {
recursive: true,
});
await NodeFSP.writeFile(
NodePath.join(workspaceRoot, "package.json"),
`${JSON.stringify({ name: "t3code", private: true, scripts: { test: "vp test" } }, null, 2)}\n`,
);
await NodeFSP.writeFile(NodePath.join(workspaceRoot, "favicon.svg"), PROJECT_FAVICONS.t3code);
await NodeFSP.writeFile(
NodePath.join(workspaceRoot, "apps/mobile/src/features/home/environmentPresence.ts"),
BASE_ENVIRONMENT_PRESENCE,
);
await initializeRepository({
workspaceRoot,
repositoryUrl: "https://github.com/pingdotgg/t3code.git",
commitMessage: "Show connected environments",
});
await runGit(workspaceRoot, ["checkout", "-b", "feat/remote-command-center"]);
await NodeFSP.writeFile(
NodePath.join(workspaceRoot, "apps/mobile/src/features/home/environmentPresence.ts"),
UPDATED_ENVIRONMENT_PRESENCE,
);
await NodeFSP.writeFile(
NodePath.join(workspaceRoot, "apps/mobile/src/features/home/RemoteHandoffCard.tsx"),
REMOTE_HANDOFF_CARD,
);
}
async function seedCompanionWorkspace(input: {
readonly workspaceRoot: string;
readonly title: string;
readonly repositoryUrl: string;
readonly favicon: string;
}): Promise {
await NodeFSP.mkdir(input.workspaceRoot, { recursive: true });
await NodeFSP.writeFile(NodePath.join(input.workspaceRoot, "favicon.svg"), input.favicon);
await NodeFSP.writeFile(
NodePath.join(input.workspaceRoot, "README.md"),
`# ${input.title}\n\nSeeded by the T3 Code mobile screenshot harness.\n`,
);
await initializeRepository({
workspaceRoot: input.workspaceRoot,
repositoryUrl: input.repositoryUrl,
commitMessage: `Seed ${input.title} workspace`,
});
}
function insertThread(
database: NodeSqlite.DatabaseSync,
now: number,
input: {
readonly id: string;
readonly projectId: string;
readonly title: string;
readonly branch: string;
readonly minutesAgo: number;
readonly state?: "working" | "approval" | "plan";
readonly settled?: boolean;
readonly snoozeMinutes?: number;
readonly workspaceRoot: string;
},
): void {
const turnId = `${input.id}-turn`;
const updatedAt = minutesBefore(now, input.minutesAgo);
const isWorking = input.state === "working";
const snoozedUntil =
input.snoozeMinutes === undefined
? null
: new Date(now + input.snoozeMinutes * 60_000).toISOString();
const snoozedAt =
input.snoozeMinutes === undefined
? null
: minutesBefore(now, Math.max(1, Math.floor(input.minutesAgo / 2)));
database
.prepare(
`INSERT INTO projection_threads (
thread_id, project_id, title, model_selection_json, runtime_mode, interaction_mode,
branch, worktree_path, latest_turn_id, latest_user_message_at, pending_approval_count,
pending_user_input_count, has_actionable_proposed_plan, created_at, updated_at,
archived_at, deleted_at, settled_override, settled_at, snoozed_until, snoozed_at
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 0, ?, ?, ?, NULL, NULL, ?, ?, ?, ?)`,
)
.run(
input.id,
input.projectId,
input.title,
MODEL_SELECTION,
"full-access",
input.state === "plan" ? "plan" : "default",
input.branch,
input.workspaceRoot,
turnId,
minutesBefore(now, input.minutesAgo + 1),
input.state === "approval" ? 1 : 0,
input.state === "plan" ? 1 : 0,
minutesBefore(now, input.minutesAgo + 120),
updatedAt,
input.settled ? "settled" : null,
input.settled ? updatedAt : null,
snoozedUntil,
snoozedAt,
);
database
.prepare(
`INSERT INTO projection_turns (
thread_id, turn_id, pending_message_id, assistant_message_id, state, requested_at,
started_at, completed_at, checkpoint_turn_count, checkpoint_ref, checkpoint_status,
checkpoint_files_json, source_proposed_plan_thread_id, source_proposed_plan_id
) VALUES (?, ?, NULL, ?, ?, ?, ?, ?, NULL, NULL, NULL, '[]', NULL, NULL)`,
)
.run(
input.id,
turnId,
isWorking ? null : `${input.id}-answer`,
isWorking ? "running" : "completed",
minutesBefore(now, input.minutesAgo + 2),
minutesBefore(now, input.minutesAgo + 2),
isWorking ? null : updatedAt,
);
database
.prepare(
`INSERT INTO projection_thread_sessions (
thread_id, status, provider_name, provider_instance_id, provider_session_id,
provider_thread_id, runtime_mode, active_turn_id, last_error, updated_at
) VALUES (?, ?, 'Codex', 'codex', NULL, NULL, 'full-access', ?, NULL, ?)`,
)
.run(input.id, isWorking ? "running" : "ready", isWorking ? turnId : null, updatedAt);
}
const SEEDED_PROJECTION_TABLES = [
"projection_pending_approvals",
"projection_thread_proposed_plans",
"projection_thread_activities",
"projection_thread_messages",
"projection_thread_sessions",
"projection_turns",
"projection_threads",
"projection_projects",
"projection_state",
] as const;
const SEEDED_THREAD_COLUMNS = ["snoozed_until", "snoozed_at"] as const;
function hasSeedableSchema(dbPath: string): boolean {
let database: NodeSqlite.DatabaseSync;
try {
database = new NodeSqlite.DatabaseSync(dbPath, { readOnly: true });
} catch {
return false;
}
try {
const tableCount = database
.prepare(
`SELECT COUNT(*) AS count FROM sqlite_master WHERE type = 'table' AND name IN (${SEEDED_PROJECTION_TABLES.map(() => "?").join(", ")})`,
)
.get(...SEEDED_PROJECTION_TABLES) as { count: number };
if (tableCount.count !== SEEDED_PROJECTION_TABLES.length) return false;
const threadColumns = database.prepare("PRAGMA table_info(projection_threads)").all() as Array<{
name: string;
}>;
const threadColumnNames = new Set(threadColumns.map((column) => column.name));
return SEEDED_THREAD_COLUMNS.every((column) => threadColumnNames.has(column));
} catch {
return false;
} finally {
database.close();
}
}
async function waitForSeedableSchema(dbPath: string, timeoutMs = 60_000): Promise {
const deadline = Date.now() + timeoutMs;
while (Date.now() < deadline) {
if (hasSeedableSchema(dbPath)) return;
await new Promise((resolve) => setTimeout(resolve, 250));
}
throw new Error(`The environment server did not migrate ${dbPath} within ${timeoutMs}ms.`);
}
function seedDatabase(
dbPath: string,
workspaceRoots: ReadonlyMap,
projects: ReadonlyArray<(typeof SHOWCASE_PROJECTS)[number]>,
threads: ReadonlyArray<(typeof SHOWCASE_THREADS)[number]>,
now: number,
): void {
// The environment server is already running against this file and keeps
// writing (migrations, projections) while we seed, so the write lock is
// genuinely contended — without a busy timeout `BEGIN IMMEDIATE` fails
// instantly with SQLITE_BUSY on a loaded machine.
const database = new NodeSqlite.DatabaseSync(dbPath, { timeout: 30_000 });
try {
database.exec("BEGIN IMMEDIATE");
for (const table of SEEDED_PROJECTION_TABLES) {
database.exec(`DELETE FROM ${table}`);
}
const insertProject = database.prepare(
`INSERT INTO projection_projects (
project_id, title, workspace_root, default_model_selection_json, scripts_json,
created_at, updated_at, deleted_at
) VALUES (?, ?, ?, ?, ?, ?, ?, NULL)`,
);
for (const [index, project] of projects.entries()) {
const workspaceRoot = workspaceRoots.get(project.id);
if (!workspaceRoot) throw new Error(`Missing workspace root for ${project.id}.`);
const latestThreadMinutes = Math.min(
...threads
.filter((thread) => thread.projectId === project.id)
.map((thread) => thread.minutesAgo),
);
insertProject.run(
project.id,
project.title,
workspaceRoot,
MODEL_SELECTION,
PROJECT_SCRIPTS,
minutesBefore(now, 60 * 24 * (90 - index * 12)),
minutesBefore(now, latestThreadMinutes),
);
}
for (const thread of threads) {
const workspaceRoot = workspaceRoots.get(thread.projectId);
if (!workspaceRoot) throw new Error(`Missing workspace root for ${thread.projectId}.`);
insertThread(database, now, {
...thread,
...("state" in thread ? { state: thread.state } : {}),
workspaceRoot,
});
}
const insertMessage = database.prepare(
`INSERT INTO projection_thread_messages (
message_id, thread_id, turn_id, role, text, is_streaming, attachments_json,
created_at, updated_at
) VALUES (?, ?, ?, ?, ?, 0, NULL, ?, ?)`,
);
for (const thread of threads) {
const turnId = `${thread.id}-turn`;
const requestTime = minutesBefore(now, thread.minutesAgo + 5);
insertMessage.run(
`${thread.id}-request`,
thread.id,
turnId,
"user",
thread.request,
requestTime,
requestTime,
);
if (thread.response !== null) {
const responseTime = minutesBefore(now, thread.minutesAgo);
insertMessage.run(
`${thread.id}-answer`,
thread.id,
turnId,
"assistant",
thread.response,
responseTime,
responseTime,
);
}
}
const turnId = `${SHOWCASE_THREAD_ID}-turn`;
const insertActivity = database.prepare(
`INSERT INTO projection_thread_activities (
activity_id, thread_id, turn_id, tone, kind, summary, payload_json, sequence, created_at
) VALUES (?, ?, ?, 'tool', 'tool.completed', ?, ?, ?, ?)`,
);
insertActivity.run(
"trace-remote-handoff",
SHOWCASE_THREAD_ID,
turnId,
"Traced the remote handoff path",
JSON.stringify({
itemType: "command_execution",
title: "Traced the remote handoff path",
detail: "Three environments, one continuous workspace",
status: "completed",
}),
1,
minutesBefore(now, 8),
);
insertActivity.run(
"sync-command-center",
SHOWCASE_THREAD_ID,
turnId,
"Synced the command center",
JSON.stringify({
itemType: "file_change",
title: "Synced the command center",
detail: "2 files changed · instant handoffs · calm reconnects",
status: "completed",
}),
2,
minutesBefore(now, 6),
);
insertActivity.run(
"run-changed-suite",
SHOWCASE_THREAD_ID,
turnId,
"Ran the changed workspace",
JSON.stringify({
itemType: "command_execution",
title: "Ran the changed workspace",
detail: "612 tests passed · 3 environments online",
status: "completed",
}),
3,
minutesBefore(now, 4),
);
for (const [index, projector] of PROJECTOR_NAMES.entries()) {
database
.prepare(
"INSERT INTO projection_state (projector, last_applied_sequence, updated_at) VALUES (?, ?, ?)",
)
.run(projector, index + 1, minutesBefore(now, 1));
}
database.exec("COMMIT");
} catch (error) {
// A failed BEGIN (or an error SQLite already auto-rolled back) leaves no
// transaction, and the rollback's own "cannot rollback" error would then
// replace the one that actually explains the failure.
try {
database.exec("ROLLBACK");
} catch {
// Nothing to roll back.
}
throw error;
} finally {
database.close();
}
}
export async function seedShowcaseEnvironment(input: {
readonly baseDir: string;
readonly projectIds?: ReadonlyArray;
readonly now?: number;
}): Promise<{ readonly dbPath: string; readonly workspaceRoot: string }> {
const now = input.now ?? Date.now();
const selectedProjectIds = new Set(
input.projectIds ?? SHOWCASE_PROJECTS.map((project) => project.id),
);
const projects = SHOWCASE_PROJECTS.filter((project) => selectedProjectIds.has(project.id));
if (projects.length === 0) throw new Error("At least one showcase project must be selected.");
const threads = SHOWCASE_THREADS.filter((thread) => selectedProjectIds.has(thread.projectId));
const workspaceBase = NodePath.join(input.baseDir, "workspace");
const workspaceRoots = new Map(
projects.map(
(project) => [project.id, NodePath.join(workspaceBase, project.directory)] as const,
),
);
const primaryProject =
projects.find((project) => project.id === SHOWCASE_PROJECT_ID) ?? projects[0];
if (!primaryProject) throw new Error("The primary showcase workspace is not configured.");
const workspaceRoot = workspaceRoots.get(primaryProject.id);
if (!workspaceRoot) throw new Error("The primary showcase workspace is not configured.");
const dbPath = NodePath.join(input.baseDir, "userdata", "state.sqlite");
if (primaryProject.id === SHOWCASE_PROJECT_ID) {
await seedT3CodeWorkspace(workspaceRoot);
}
await Promise.all(
projects
.filter((project) => project.id !== SHOWCASE_PROJECT_ID)
.map(async (project) => {
const projectWorkspaceRoot = workspaceRoots.get(project.id);
if (!projectWorkspaceRoot) throw new Error(`Missing workspace root for ${project.id}.`);
await seedCompanionWorkspace({
workspaceRoot: projectWorkspaceRoot,
title: project.title,
repositoryUrl: project.repositoryUrl,
favicon: project.favicon,
});
}),
);
// The environment server begins listening before it finishes migrating the
// database, so wait for the schema before deleting from and reseeding it.
await waitForSeedableSchema(dbPath);
seedDatabase(dbPath, workspaceRoots, projects, threads, now);
const terminalDirectory = NodePath.join(input.baseDir, "userdata", "logs", "terminals");
if (selectedProjectIds.has(SHOWCASE_PROJECT_ID)) {
const safeThreadId = Buffer.from(SHOWCASE_THREAD_ID).toString("base64url");
await NodeFSP.mkdir(terminalDirectory, { recursive: true });
await NodeFSP.writeFile(
NodePath.join(terminalDirectory, `terminal_${safeThreadId}.log`),
SHOWCASE_TERMINAL_BUFFER,
);
}
return { dbPath, workspaceRoot };
}