GA "plan" context preservation through compaction

[stirby]

UPDATE: Completed, needs to be brought out of experimental.

Issue statement

When users conduct a plan, we can presume that's high-value context they expect to preserve through execution. If the execution of that plan exceeds the context compression threshold, the meticulously crafted plan maybe compacted with the chat.

Proposed behavior

When autocompaction runs after any plan has been created (using plan mode), the contents of that plan. Should be completely preserved through compaction.

Open questions

When /compact is run, we could prompt the user to preserve the plan context. I am not sure if indefinitely storing the plan is really a viable strategy.

If a user ever decides to run multiple plans in a single chat, do we preserve all context? Or just the latest plan?

[stirby]

@ammario from call.

[ethanndickson]

We currently have an experiment that does this:

I imagine we can safely make it the default now

[stirby]

My fault, let's consider this tracking for when that comes out of experimental @ethanndickson.

[stirby]

@ethanndickson Can we add docs explaining the behavior when we bring it out?

• https://mux.coder.com/workspaces/compaction/automatic#automatic-compaction
• https://mux.coder.com/agents/plan-mode#how-it-works

[ibetitsmike]

@ThomasK33 is the author of this one IIRC - we can take it off the feature flag and add to docs

[ThomasK33]

Stabilized in #1932