Manual compacting makes context larger
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- Dominant language
- Rust
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Description
What version of the Codex App are you using (From “About Codex” dialog)?
26.818.61809
What subscription do you have?
Plus
What platform is your computer?
Microsoft Windows NT 10.0.26200.0 x64
What issue are you seeing?
I had long chat and it was repeatedly compacting like five times in a row at least. Then decided to manually compact
This was before compacting
Context:
6% left (244,138 used / 258K)
After using /compact
Context:
0% left (258,400 used / 258K)
So compacting actually made context larger.
What steps can reproduce the bug?
Run model Luna 5.6 on Max reasoning. Long enough context and I started getting repeated compacts. Then tried to manually trigger compact and context got larger after.
What is the expected behavior?
Context would actually compact to smaller size.
Additional information
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the report on Windows with a long context, Luna 5.6, Max reasoning, and the manual /compact command; compare the context usage before and after compaction. Trace the compaction entry point and verify that completed behavior reduces context usage rather than increasing it or reaching the limit.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- cli
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100