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missing --fusion-tier argument #5290
Description
Describe the bug
Hi,
Please correct me if I'm mistaken, but according to this documentation, fusionTier settings can be configured using the --fusion-tier argument.
However, in the latest public release, this argument is not supported:
$ copilot --version
GitHub Copilot CLI 1.0.105.
Run 'copilot update' to check for updates.
$ export COPILOT_CLI_ENABLED_FEATURE_FLAGS=DYNAMIC_AUTO_TIERS
$ copilot --model fusion --fusion-tier standard
error: unexpected argument '--fusion-tier' found
tip: a similar argument exists: '--plugin-dir'
Usage: copilot --model <model> --plugin-dir <directory>
Thanks for your help
Affected version
1.0.105
Steps to reproduce the behavior
- Enable the dynamic auto tiers feature flag:
export COPILOT_CLI_ENABLED_FEATURE_FLAGS=DYNAMIC_AUTO_TIERS- Run copilot cli specifying the fusion model and attempting to select a fusion tier (standard, high, or max):
copilot --model fusion --fusion-tier standardExpected behavior
--fusion-tier argument should be supported and change the fusionTier setttings
Additional context
No response
Reacted by Marin Virdol and Hector Zarate
Activity
mhjit commentedon Oct 29, 2026
hi @pitpit
I came by this issue by accident and it solved my issue with
DYNAMIC_AUTO_TIERS, thanks 👍Is
export COPILOT_CLI_ENABLED_FEATURE_FLAGS=DYNAMIC_AUTO_TIERSdocumented anywhere?pitpit commentedon Oct 30, 2026
You're right, it isn't documented anywhere official. I found it in the github sdk