read -rs "?Bedrock APIキーを貼り付けてEnter: " BEDROCK_API_KEY && export BEDROCK_API_KEY

export COPILOT_PROVIDER_TYPE=anthropic
export COPILOT_PROVIDER_BASE_URL="http://127.0.0.1:8788/anthropic" # 後述する proxy の URL
export COPILOT_PROVIDER_API_KEY="$BEDROCK_API_KEY"
export COPILOT_MODEL='<モデルID>'

import http from 'node:http'
import https from 'node:https'
import { URL } from 'node:url'

const REGION = process.env.REGION ?? 'us-west-2'
const DEFAULT_PORT = 8788

const TARGET = new URL(process.env.BEDROCK_TARGET ?? `https://bedrock-runtime.${REGION}.amazonaws.com`)
const PORT = Number(process.env.PROXY_PORT ?? DEFAULT_PORT)
const STRIP_KEYS = ['temperature', 'top_p', 'top_k']
// Messages API のリクエストは画像込みでも数MB程度。無制限に受けるとローカルDoSの穴になる
const MAX_BODY_BYTES = 32 * 1024 * 1024

// ホップバイホップヘッダーと、書き換えが必要なヘッダーは転送しない
const DROP_HEADERS = new Set(['host', 'connection', 'content-length', 'transfer-encoding'])

function buildForwardHeaders(reqHeaders) {
  return Object.fromEntries(
    Object.entries(reqHeaders).filter(([name]) => !DROP_HEADERS.has(name.toLowerCase()))
  )
}

// JSON ボディから STRIP_KEYS を除いた新しいボディを返す（JSONでなければそのまま）
function stripBody(rawBody) {
  if (rawBody.length === 0) return { body: rawBody, stripped: [] }
  try {
    const parsed = JSON.parse(rawBody.toString('utf8'))
    if (parsed === null || typeof parsed !== 'object' || Array.isArray(parsed)) {
      return { body: rawBody, stripped: [] }
    }
    const stripped = STRIP_KEYS.filter((key) => key in parsed)
    if (stripped.length === 0) return { body: rawBody, stripped }
    const cleaned = Object.fromEntries(
      Object.entries(parsed).filter(([key]) => !STRIP_KEYS.includes(key))
    )
    return { body: Buffer.from(JSON.stringify(cleaned), 'utf8'), stripped }
  } catch {
    return { body: rawBody, stripped: [] }
  }
}

const server = http.createServer((clientReq, clientRes) => {
  const chunks = []
  let receivedBytes = 0
  let rejected = false
  clientReq.on('data', (chunk) => {
    receivedBytes += chunk.length
    if (receivedBytes > MAX_BODY_BYTES) {
      rejected = true
      console.error(`[proxy] request body exceeded ${MAX_BODY_BYTES} bytes, rejected`)
      clientRes.writeHead(413, { 'content-type': 'application/json' })
      clientRes.end(JSON.stringify({ error: 'payload_too_large' }))
      clientReq.destroy()
      return
    }
    chunks.push(chunk)
  })
  clientReq.on('end', () => {
    if (rejected) return
    const { body, stripped } = stripBody(Buffer.concat(chunks))

    const transport = TARGET.protocol === 'https:' ? https : http
    const upstreamReq = transport.request(
      {
        protocol: TARGET.protocol,
        hostname: TARGET.hostname,
        port: TARGET.port || (TARGET.protocol === 'https:' ? 443 : 80),
        path: clientReq.url,
        method: clientReq.method,
        headers: {
          ...buildForwardHeaders(clientReq.headers),
          host: TARGET.host,
          'content-length': Buffer.byteLength(body),
        },
      },
      (upstreamRes) => {
        const note = stripped.length > 0 ? ` (stripped: ${stripped.join(', ')})` : ''
        console.error(
          `[proxy] ${clientReq.method} ${clientReq.url} -> ${upstreamRes.statusCode}${note}`
        )
        clientRes.writeHead(upstreamRes.statusCode, upstreamRes.headers)
        upstreamRes.pipe(clientRes) // SSE ストリーミングもそのまま素通し
      }
    )

    upstreamReq.on('error', (error) => {
      // 詳細はコンソールにのみ出す(レスポンスに載せると内部情報の露出になる)
      console.error(`[proxy] upstream error: ${error.message}`)
      if (clientRes.headersSent) {
        clientRes.destroy()
        return
      }
      clientRes.writeHead(502, { 'content-type': 'application/json' })
      clientRes.end(JSON.stringify({ error: 'proxy_upstream_error' }))
    })

    upstreamReq.end(body)
  })
})

server.listen(PORT, '127.0.0.1', () => {
  console.error(`[proxy] listening on http://127.0.0.1:${PORT} -> ${TARGET.origin}`)
})

400 `temperature` is deprecated for this model.

copilot -p "こんにちは。1+1は?"

2やで！✌️
やっほー、なんか作業あったら気軽に言うてな〜

400 `temperature` is deprecated for this model.

copilot -p "こんにちは。1+1は?" \
  --log-level debug --log-dir ./verify-logs

2026-08-25T11:36:04.405Z [DEBUG] Wire request: {
  "model": "global.anthropic.claude-opus-5",
  ...
  "temperature": 0
}