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/**

* Preflight for the overlay efficacy harness.

*

* Confirms, before any paid eval runs:

* 1. `@anthropic-ai/claude-agent-sdk` loads and `query()` is the expected shape.

* 2. `claude-opus-4-7` is a live API model ID (not a Claude Code alias).

* 3. The SDK event stream contains the types we assume (system init, assistant,

* result) with the fields we destructure.

* 4. `scripts/resolvers/model-overlay.ts` resolves `{{INHERIT:claude}}` against

* `opus-4-7.md` with no unresolved inheritance directives.

* 5. A local `claude` binary exists at `which claude` so binary pinning is possible.

*

* Run: bun run scripts/preflight-agent-sdk.ts [--live]

*

* Checks 1-2 and 4-5 are free. Check 3 (the live SDK query, ~15 tokens of API

* spend) runs only with --live. Exit 0 on success, 1 on any failed check,

* 2 on a bad argument.

*/

import '../lib/conductor-env-shim';

import { query, type SDKMessage } from '@anthropic-ai/claude-agent-sdk';

import { readOverlay } from './resolvers/model-overlay';

import { resolveClaudeBinary } from '../lib/claude-bin';

const USAGE = `Usage: bun run scripts/preflight-agent-sdk.ts [--live]

Free checks: overlay resolution and local claude binary pinning.

--live also runs one end-to-end SDK query against claude-opus-4-7

(~15 tokens of API spend; needs ANTHROPIC_API_KEY).`;

function parsePreflightArgs(argv: string[]): { help: boolean; live: boolean } {

const parsed = { help: false, live: false };

for (const arg of argv) {

if (arg === '--help' || arg === '-h') parsed.help = true;

else if (arg === '--live') parsed.live = true;

else throw new Error(`unknown argument "${arg}"`);

}

return parsed;

}

async function main() {

let args: { help: boolean; live: boolean };

try {

args = parsePreflightArgs(process.argv.slice(2));

} catch (err) {

console.error(`preflight-agent-sdk: ${(err as Error).message}\n\n${USAGE}`);

process.exit(2);

}

if (args.help) {

console.log(USAGE);

return;

}

const failures: string[] = [];

const pass = (msg: string) => console.log(` ok ${msg}`);

const fail = (msg: string) => {

console.log(` FAIL ${msg}`);

failures.push(msg);

};

// 1. Overlay resolver

console.log('1. Overlay resolver');

const resolved = readOverlay('opus-4-7');

if (!resolved) {

fail("readOverlay('opus-4-7') returned empty");

} else {

pass(`resolved overlay length: ${resolved.length} chars`);

if (resolved.includes('{{INHERIT:')) {

fail('resolved overlay still contains {{INHERIT:...}} directive');

} else {

pass('no unresolved INHERIT directives');

}

}

// 2. Local claude binary exists

console.log('\n2. Binary pinning');

let claudePath: string | null = resolveClaudeBinary();

if (claudePath) {

pass(`local claude binary: ${claudePath}`);

} else {

fail('`Bun.which("claude")` failed — cannot pin binary (set GSTACK_CLAUDE_BIN to override)');

}

// 3. SDK query end-to-end

console.log('\n3. SDK query end-to-end');

if (!args.live) {

console.log(' skip live query not requested — rerun with --live to spend ~15 tokens on it');

} else if (!process.env.ANTHROPIC_API_KEY) {

console.log(' skip ANTHROPIC_API_KEY not set — cannot test live query');

} else {

try {

const events: SDKMessage[] = [];

const q = query({

prompt: 'say pong',

options: {

model: 'claude-opus-4-7',

systemPrompt: '',

tools: [],

permissionMode: 'bypassPermissions',

allowDangerouslySkipPermissions: true,

settingSources: [],

maxTurns: 1,

pathToClaudeCodeExecutable: claudePath ?? undefined,

env: { ANTHROPIC_API_KEY: process.env.ANTHROPIC_API_KEY },

},

});

for await (const ev of q) events.push(ev);

pass(`received ${events.length} events`);

const init = events.find(

(e) => e.type === 'system' && (e as { subtype?: string }).subtype === 'init',

) as { claude_code_version?: string; model?: string } | undefined;

if (!init) {

fail('no system/init event received');

} else {

pass(`system init: claude_code_version=${init.claude_code_version}, model=${init.model}`);

}

const assistantEvents = events.filter((e) => e.type === 'assistant');

if (assistantEvents.length === 0) {

fail('no assistant events received — model ID may be rejected');

} else {

pass(`received ${assistantEvents.length} assistant event(s)`);

const first = assistantEvents[0] as { message?: { content?: unknown[] } };

const content = first.message?.content;

if (!Array.isArray(content)) {

fail('first assistant event has no content[] array');

} else {

pass(`first assistant content[] has ${content.length} block(s)`);

}

}

const result = events.find((e) => e.type === 'result') as

| { subtype?: string; total_cost_usd?: number; num_turns?: number }

| undefined;

if (!result) {

fail('no result event received');

} else {

pass(

`result: subtype=${result.subtype}, cost=$${result.total_cost_usd?.toFixed(4)}, turns=${result.num_turns}`,

);

}

} catch (err) {

fail(`SDK query threw: ${err instanceof Error ? err.message : String(err)}`);

}

}

console.log();

if (failures.length > 0) {

console.log(`PREFLIGHT FAILED: ${failures.length} check(s) failed`);

process.exit(1);

}

console.log('PREFLIGHT OK');

}

if (import.meta.main) {

main().catch((err) => {

console.error(err);

process.exit(1);

});

}