Fresh chat sends ~42,000 input tokens before user types anything

Description

A brand new session (no previous conversation, no project history) appears to send approximately 30,000+ input tokens before any meaningful interaction.

The only user message is: hi

Yet the provider reports roughly 30k+ input tokens.

This happens consistently on a fresh session.

Expected behavior

A new session should send only the base system prompt and essential context, which should be much smaller.

Actual behavior

The provider receives approximately 30k+ input tokens on the first request.

This causes providers with lower TPM limits (for example Groq) to immediately reject requests due to rate limits, even though the conversation is empty.

Environment

• OpenCode: 1.18.3
• Provider: Groq
• Fresh session
• No conversation history

Additional information

This seems unrelated to conversation history since it occurs immediately in a new chat.

It would be helpful to expose a breakdown of the generated prompt (system prompt, tool schemas, agent prompt, instructions, etc.) to identify which component contributes most of the tokens.

log.txt

Plugins

none

OpenCode version

1.18.4

Steps to reproduce

in termux type opencode.
selec model as llama-3.1-8b- instant or get oss.
type hi.

Screenshot and/or share link

Operating System

proot-distro ubuntu Linux 6.17

Terminal

termux on Android