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I think you have to add the entire list in one go, in JSON notation? Else edit the YAML file directly.

Actually, I've never tried anything like `pulumi config set aws:allowedAccountIds[0] xyz`... might be worth a shot?

I tried indexing it as well but that doesn't work

Ah, indexing is the way to go, but you need to add the `--path` option to tell it that there's an index in the key.
```pulumi config set --path 'delete[0]' me```

From `pulumi config set --help`:
&gt; Flags:
&gt;   -h, --help        help for set
&gt;       --path        The key contains a path to a property in a map or list to set
&gt;       --plaintext   Save the value as plaintext (unencrypted)
&gt;       --secret      Encrypt the value instead of storing it in plaintext

Ways of working, eh? I've never used `pulumi config set`, I always edit the file...

Ahhhh!! I had tried the `—-path` flag and it didn't work. I noticed your quotes `‘’` around the index just now, and lo and behold…it worked.

Haha thanks!

Yes, need single quotes to ensure sh/bash doesn't parse `[`