`_noop` tool injection causes empty compaction summaries on LiteLLM proxies

[ufo009e]

Description

When using a LiteLLM-based provider, the compaction agent produces an empty summary (calls _noop instead of generating text), causing complete post-compaction amnesia. The agent loses all knowledge of the conversation after compaction.

The compaction agent (packages/opencode/src/session/compaction.ts) passes tools: {} (empty) to processor.process(). When the conversation history contains any tool calls (e.g., a bash or read call from earlier), all three conditions are met, and _noop gets injected into the compaction request.

The model then calls _noop instead of generating the summary text. The resulting compaction message has summary: true but contains only step-start + tool (_noop) + step-finish parts — no text part with the actual summary.

Plugins

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OpenCode version

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Steps to reproduce

Reproduction Steps

1. Start opencode with a LiteLLM-based provider
2. Have a conversation that involves tool calls (e.g., "list files in this directory")
3. Trigger compaction (manual via /compact or automatic via context overflow)
4. Ask the agent what it was previously working on

Screenshot and/or share link

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Operating System

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Terminal

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[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Compaction loses entire conversation #14368: Compaction loses entire conversation — describes the same symptom of _noop being called during compaction instead of generating a summary, causing the agent to lose conversation context.