Input Messages

Messages sent to Claude Code via stdin when using --input-format stream-json. Each message is a single JSON line (NDJSON).

claude-wire's writer module constructs these automatically. You only need to know this if you're working with the protocol directly.

user

Send a follow-up prompt in a multi-turn session.

{
  "type": "user",
  "message": {
    "role": "user",
    "content": "What was my previous question?"
  }
}

import { writer } from "@pivanov/claude-wire";
process.stdout.write(writer.user("What was my previous question?"));

approve

Approve a pending tool execution.

{
  "type": "approve",
  "tool_use_id": "toolu_abc123"
}

writer.approve("toolu_abc123");

deny

Deny a pending tool execution.

{
  "type": "deny",
  "tool_use_id": "toolu_abc123"
}

writer.deny("toolu_abc123");

tool_result

Provide a custom result for a tool instead of letting it execute.

{
  "type": "tool_result",
  "tool_use_id": "toolu_abc123",
  "content": "mocked file contents"
}

writer.toolResult("toolu_abc123", "mocked file contents");

// Mark the result as an error:
writer.toolResult("toolu_abc123", "permission denied", { isError: true });

abort

Abort the current operation.

{
  "type": "abort"
}

writer.abort();