500 error when adding context using claude code with Claude 4 models hosted by GitHub Copilot

[anson627]

ERROR Error occurred: Failed to create chat completions 12:25:26 PM

at I (/opt/homebrew/lib/node_modules/copilot-api/dist/main.js:2:8395)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async _e (/opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3051)
at async /opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3757
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async cors2 (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/cors/index.js:84:5)
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async logger2 (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/logger/index.js:38:5)
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async /opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/hono-base.js:201:25

ERROR HTTP error: { error: 12:25:26 PM
{ message:
'messages.8: tool_use ids were found without tool_result blocks immediately after: toolu_016F4YKDQwPpE5Vxh9GZoatt. Each tool_use block must have a corresponding tool_result block in the next message.',
code: 'invalid_request_body' } }

TypeError: Body is unusable: Body has already been read
at consumeBody (node:internal/deps/undici/undici:6197:15)
at _Response.text (node:internal/deps/undici/undici:6149:18)
at f (file:///opt/homebrew/lib/node_modules/copilot-api/dist/main.js:2:1937)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async file:///opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3785
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async cors2 (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/cors/index.js:84:5)
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async logger2 (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/logger/index.js:38:5)
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
--> POST /v1/messages?beta=true 500 718ms
<-- POST /v1/messages?beta=true

ERROR Failed to create chat completions Response { status: 400, 12:26:03 PM
statusText: 'Bad Request',
headers:
Headers { 'content-security-policy': "default-src 'none'; sandbox",
'content-type': 'text/plain; charset=utf-8',
'copilot-edits-session': '1752780363.cf0fae7fca7494f5776bb08d803bd2c30cf234b44272c29cdd8ee4d1a060840c',
'strict-transport-security': 'max-age=31536000',
'x-content-type-options': 'nosniff',
'x-request-id': '205acef1-65bc-41b9-993a-48f319f20557',
date: 'Thu, 17 Jul 2025 19:26:03 GMT',
'content-length': '261',
'x-github-backend': 'Kubernetes',
'x-github-request-id': 'DC36:310320:1B342D:21409A:68794E4B' },
body: ReadableStream { locked: false, state: 'readable', supportsBYOB: true },
bodyUsed: false,
ok: false,
redirected: false,
type: 'basic',
url: 'https://api.githubcopilot.com/chat/completions' }

ERROR Error occurred: Failed to create chat completions 12:26:03 PM

at I (/opt/homebrew/lib/node_modules/copilot-api/dist/main.js:2:8395)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async _e (/opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3051)
at async /opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3757
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async cors2 (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/cors/index.js:84:5)
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async logger2 (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/logger/index.js:38:5)
at async dispatch (/opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async /opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/hono-base.js:201:25

ERROR HTTP error: { error: 12:26:03 PM
{ message:
'messages.8: tool_use ids were found without tool_result blocks immediately after: toolu_016F4YKDQwPpE5Vxh9GZoatt. Each tool_use block must have a corresponding tool_result block in the next message.',
code: 'invalid_request_body' } }

TypeError: Body is unusable: Body has already been read
at consumeBody (node:internal/deps/undici/undici:6197:15)
at _Response.text (node:internal/deps/undici/undici:6149:18)
at f (file:///opt/homebrew/lib/node_modules/copilot-api/dist/main.js:2:1937)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async file:///opt/homebrew/lib/node_modules/copilot-api/dist/main.js:8:3785
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async cors2 (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/cors/index.js:84:5)
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
at async logger2 (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/middleware/logger/index.js:38:5)
at async dispatch (file:///opt/homebrew/lib/node_modules/copilot-api/node_modules/hono/dist/compose.js:22:17)
--> POST /v1/messages?beta=true 500 541ms

[anson627]

it's actually a bug on Anthropic's side
anthropics/claude-code#473