Until now the only choice was 272K for every model or Full window for every model. The 272K default stays as it is (e950eb08: OpenAI runs its own 1M models at 272K in Codex, and Chen saw 70–90s to a first token at 550K).
What changes:
- A provider's editor has Compact at beside Context window and Max output, in the same form: "500k" for all of its models, "deepseek-v4-flash=272k" for one, and empty to follow Settings. A size at or above a model's window means the whole window. The values are kept in settings.ModelCompacts.
- Settings → Long conversations takes a size of its own beside Compact at / Full window (settings.CompactAt).
- `magpie model compact` takes a size such as 500k.
Order: the model's own value, then its provider's "*", then Settings. Full window turns off only the Settings value. A group uses the smallest value among its members.
Where it applies:
- Codex's model_catalog is told the threshold as context_window, with the whole window as max_context_window.
- Claude Code's CLAUDE_CODE_AUTO_COMPACT_WINDOW follows the main model. A Claude model now takes its provider's value when one is set.
- The Codex list tag changes when the Settings size or Full window changes.
Tests:
- New: TestModelCompactsSetFromTheEditor, TestSetCompactAt, TestCodexCatalogCompactAt and TestClaudeCompactAt.
- TestSettingsSaveKeepsWhatItDoesNotSend now covers the two new fields.
- compact-at.test.cjs (WebKit, en/zh) checks the editor field (shown, refused, chips, saved) and the Settings size (posted, hidden under Full window, no scroll).
- go vet ./..., go test -tags nogui of the root package, provider, codexcat, agent, gui, gateway, settings and catalog under a temp HOME, and GOOS=linux/windows builds all pass.
yetone
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