Authenticate the Fluxions websocket

[coval-cale]

Add an api key handshake to the fluxions client

Greptile Summary

The PR adds API-key authentication to the Fluxions TTS WebSocket handshake.

• Adds FLUXIONS_API_KEY to settings, environment documentation, and the provider-key registry.
• Requires the credential when constructing the Fluxions provider and sends it as a Bearer authorization header.
• Updates Fluxions tests to cover authenticated handshakes and missing credentials.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code defect established.

The new credential follows the existing settings and provider-key conventions, and the supported WebSocket dependency accepts the authorization-header argument used by the handshake.

_{Reviews (1): Last reviewed commit: "Authenticate the Fluxions websocket" | Re-trigger Greptile}

Context used:

• Knowledge Base — Runner Orchestration

[vercel]

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Project	Deployment	Actions	Updated (UTC)
benchmarks	Ready	Preview	Aug 5, 2026 4:12pm

[coderabbitai]

Walkthrough

This change adds FLUXIONS_API_KEY to example environment configuration, Settings, and the provider key registry. It updates the Fluxions VUI registry note to state that FLUXIONS_API_KEY is not mounted on benchmarks-api. Fluxions TTS now requires settings.fluxions_api_key, raises ValueError when the key is absent, and sends the key as a bearer Authorization header in the synthesis WebSocket handshake. The tests now set a SecretStr API key, capture WebSocket headers, verify the bearer header, and cover the missing-key error.

Suggested reviewers: cooperr1, seribaymadina

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: Fluxions WebSocket authentication.
Description check	✅ Passed	The description directly describes adding API key authentication to the Fluxions client.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.env.example:
- Line 42: Reorder the environment entries in the .env.example block so
FLUXIONS_API_KEY appears before GLADIA_API_KEY, keeping the rest of the variable
order unchanged and aligned with the dotenv-linter expectation.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 1652aa37-553b-454d-8589-704d793a3b98

📥 Commits

Reviewing files that changed from the base of the PR and between 8f0a3c8 and e447911.

📒 Files selected for processing (6)

• .env.example
• runner/src/coval_bench/config.py
• runner/src/coval_bench/providers/tts/fluxions.py
• runner/src/coval_bench/registries/models.py
• runner/src/coval_bench/registries/provider_keys.py
• runner/tests/providers/tts/test_fluxions.py

[coderabbitai]

📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Place FLUXIONS_API_KEY before GLADIA_API_KEY.

dotenv-linter reports this key is out of order. Restore the expected order to keep the environment-file lint check passing.

🧰 Tools

🪛 dotenv-linter (4.0.0)

[warning] 42-42: [UnorderedKey] The FLUXIONS_API_KEY key should go before the GLADIA_API_KEY key

(UnorderedKey)

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.env.example at line 42, Reorder the environment entries in the .env.example
block so FLUXIONS_API_KEY appears before GLADIA_API_KEY, keeping the rest of the
variable order unchanged and aligned with the dotenv-linter expectation.

Source: Linters/SAST tools