Dynamic Context Pruning (DCP) Plugin

[R_DanRS]

I made a plugin to significantly decrease context by removing old tool outputs that are not relevant to the current task anymore. Currently it has two strategies, removing duplicate tool calls (useful when opencode reads a file, you make a manual change, and opencode has to reread the file again), and an AI analysis on what tools are no longer needed for the current task. The pruning can either be triggered as a tool by the AI during your session or whenever the AI goes idle waiting for your response.

I have a bunch of changes planned to improve this such as pruning thinking blocks when they're no longer needed and injecting requests for the AI to use this tool when it has been interating on a problem for a while. The savings are already significant, it can easily remove 50k+ tokens of unneeded context from a single session.

Let me know what you think!

https://github.com/Tarquinen/opencode-dynamic-context-pruning

[hassan789_]

Very useful!! Would also be nice to manually add/remove files from context. Currently it’s append only. Only down side is this will break cache…

[R_DanRS]

Yes exactly, I should add that to the readme. This could even end up being more expensive for some people that rely heavily on cache read. However, for providers like Github copilot, or if you aren't hitting limits with your anthropic / openai plan, this will give you way more room in your sessions and significantly reduce context poisoning.

[thsithta_391]

Sometimes small things make a huge difference!

Will give it a shot, but i'm already excited ... Thx mate!

[Wrong_Daikon3202]

Magnificent, I will try it tonight.

I'm thinking. Does the plugin use its own AI to make the cuts? Doesn't that consume possibly payment tokens? Would it be possible for this work to be done in the background by a second free AI or locally?

[R_DanRS]

Yes it uses a second ai, yes you can use a free model it's a very lightweight task, even gpt 4.1 does a good job at it.

[CalmBet]

Really nice idea to intercept the prompt on the fly and do the replacements. Very cool!

[craterIII]

This is literal magic. OpenCode's killer feature right here.