feat(atlascloud): add Atlas Cloud provider (OpenAI-compatible)

[jonigl]

Atlas Cloud (https://www.atlascloud.ai) exposes an OpenAI-compatible API at https://api.atlascloud.ai/v1 serving DeepSeek, Qwen, Kimi, GLM and MiniMax models. Add it as a first-class provider so it can be selected as "atlascloud/" with its own ATLASCLOUD_API_KEY env var.

Implemented as a thin BaseOpenAIProvider subclass (no new dependency, reuses the openai client). Declared capabilities: completion, streaming, reasoning and list_models. Embeddings, moderation, vision/PDF, rerank, batch, responses and image generation are left off as they are not exposed on the /v1 base.

• constants: register ATLASCLOUD in the LLMProvider enum
• pyproject: add the empty "atlascloud" extra and include it in "all"
• conftest: add deepseek-ai/deepseek-v4-flash to the model and reasoning model maps
• tests: unit coverage for metadata, key/base resolution, missing-key error, capability flags and enum/loader registration

Description

Adds Atlas Cloud as a first-class, OpenAI-compatible provider. It already works today by pointing the openai provider at https://api.atlascloud.ai/v1; this PR makes it a named provider (atlascloud/<model>) with its own ATLASCLOUD_API_KEY / ATLASCLOUD_API_BASE env vars and auto-generated docs.

The provider is a thin BaseOpenAIProvider subclass that only sets configuration defaults and capability flags, so it reuses the existing openai client and needs no new dependency. Declared capabilities (completion, streaming, reasoning, list_models) reflect what Atlas Cloud exposes on its /v1 base; embeddings, moderation, vision/PDF, rerank, batch, responses and image generation are intentionally left off because they are not available there (image/video generation live on a separate /api/v1 base).

PR Type

• 🆕 New Feature

Relevant issues

N/A

Checklist

• I understand the code I am submitting.
• I have added unit tests that prove my fix/feature works
• I have run this code locally and verified it fixes the issue works correctly.
• New and existing tests pass locally
• Documentation was updated where necessary
• I have read and followed the contribution guidelines
• AI Usage:
  • No AI was used.
  • AI was used for drafting/refactoring.
  • This is fully AI-generated.

AI Usage Information

• AI Model used: Claude Opus 4.8 and Claude Opus 4.6

• AI Developer Tool used: Claude Code and Visual Studio Code with GitHub Copilot built in extension

• Any other info you'd like to share: AI assisted with code drafting and tests; design decisions and final review are mine.

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Summary by CodeRabbit

• New Features

  • Added support for the Atlas Cloud provider, including provider discovery and configuration.
  • Expanded the bundled “all” option to include additional provider extras.
  • Added a new atlascloud optional dependency entry.

• Bug Fixes

  • Improved provider detection so Atlas Cloud can be selected from its string name.
  • Added validation for API key and base URL handling, with sensible defaults when not set.

• Tests

  • Added coverage for Atlas Cloud setup, capability flags, and provider registration.

[coderabbitai]

Walkthrough

This PR adds the Atlascloud provider, registers it in the provider enum and package exports, expands the consolidated optional dependency set, and updates fixtures and unit tests to cover provider lookup and configuration.

Changes

Atlascloud provider support

Layer / File(s)	Summary
Provider registration and packaging pyproject.toml, src/any_llm/constants.py, src/any_llm/providers/atlascloud/__init__.py	project.optional-dependencies.all expands, a new atlascloud extra is added, LLMProvider gains ATLASCLOUD, and the provider package exports AtlascloudProvider.
Atlascloud provider implementation src/any_llm/providers/atlascloud/atlascloud.py	AtlascloudProvider extends BaseOpenAIProvider with Atlas Cloud base settings, environment variable names, and completion/model-listing capability flags.
Fixtures and provider tests tests/conftest.py, tests/unit/providers/test_atlascloud_provider.py	Test fixtures map LLMProvider.ATLASCLOUD to reasoning and base models, and unit tests cover metadata, API key and base resolution, capability flags, and loader registration.

Possibly related PRs

• mozilla-ai/any-llm#1147: Adds another provider with the same enum, registration, and provider-test wiring pattern.

Suggested reviewers

• tbille

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarises the new Atlas Cloud provider.
Description check	✅ Passed	The description follows the template and includes the required sections, checklist, and AI usage details.
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 unit tests (beta)

• Create PR with unit tests

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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 `@pyproject.toml`:
- Line 24: The OpenAI-compatible extras are missing the runtime SDK dependency
needed by BaseOpenAIProvider, so installing one of these providers can later
fail when AsyncOpenAI is imported. Update the dependency entries in
pyproject.toml so the relevant extras (AtlascloudProvider and the other
empty-list OpenAI-compatible extras like azureopenai, cascadia, nebius,
neosantara, openai, openrouter, and portkey) explicitly include openai. Keep the
fix aligned with the existing extras definitions in the dependency array for
each provider.

🪄 Autofix (Beta)

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: ASSERTIVE

Plan: Pro

Run ID: cfa1cfa7-c7f3-4cbd-a340-9a2e579c33d2

📥 Commits

Reviewing files that changed from the base of the PR and between ca0ef07 and 37adbd4.

📒 Files selected for processing (6)

• pyproject.toml
• src/any_llm/constants.py
• src/any_llm/providers/atlascloud/__init__.py
• src/any_llm/providers/atlascloud/atlascloud.py
• tests/conftest.py
• tests/unit/providers/test_atlascloud_provider.py

[tbille]

amazing! thanks for the contribution @jonigl !! 🚀

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
src/any_llm/constants.py	100.00% <100.00%> (ø)
src/any_llm/providers/atlascloud/__init__.py	100.00% <100.00%> (ø)
src/any_llm/providers/atlascloud/atlascloud.py	100.00% <100.00%> (ø)

... and 38 files with indirect coverage changes

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