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## Summary by cubic
CLI authentication no longer requires a publishable client key. Login
works with only a project ID; pass `publishable_client_key` only if the
project has `requirePublishableClientKey` enabled.
- **New Features**
- In `stack-auth-cli-template.py`, `publishable_client_key` is optional;
requests send `x-hexclave-project-id` and `x-hexclave-access-type:
client`, and include `x-hexclave-publishable-client-key` only when
provided.
- Updated docs and generated prompts to remove the key from examples and
explain when it’s needed.
- **Migration**
- No changes required; existing calls that pass `publishable_client_key`
still work.
- You can remove the argument from `prompt_cli_login(...)` unless your
project requires it.
<sup>Written for commit 1f0e66ee74.
Summary will update on new commits.</sup>
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