feat: add Avian as a new LLM provider

[avianion]

Summary

Adds Avian as a new OpenAI-compatible LLM provider. Avian provides fast inference for top open-source models.

Available Models

Model	Context	Input $/M	Output $/M
DeepSeek V3.2	164K	$0.26	$0.38
Kimi K2.5	131K	$0.45	$2.20
GLM-5	131K	$0.30	$2.55
MiniMax M2.5	1M	$0.30	$1.10

Changes (13 files)

File	Change
core/llm/llms/Avian.ts	New provider class extending OpenAI (13 lines)
core/llm/llms/index.ts	Register in LLMClasses array
core/llm/autodetect.ts	Add to PROVIDER_HANDLES_TEMPLATING
core/llm/toolSupport.ts	Add tool support for avian models
packages/openai-adapters/src/types.ts	Add z.literal("avian") to Zod schema
packages/openai-adapters/src/index.ts	Add case "avian" to constructLlmApi
packages/llm-info/src/providers/avian.ts	Model metadata (context lengths, regex)
packages/llm-info/src/index.ts	Register in allModelProviders
gui/src/pages/AddNewModel/configs/models.ts	4 model packages
gui/src/pages/AddNewModel/configs/providers.ts	Provider card with API key input
gui/public/logos/avian.png	Provider logo (placeholder — will replace with official)
docs/customize/model-providers/more/avian.mdx	Docs page with YAML/JSON config examples
docs/docs.json	Sidebar nav entry

Usage

models:
  - model: deepseek/deepseek-v3.2
    provider: avian
    apiKey: <AVIAN_API_KEY>

Test plan

• Provider appears in "Add New Model" UI
• API key can be entered and saved
• All 4 models are listed in model selector
• Chat completions work with each model
• Streaming works correctly
• Tool/function calling works

cc @RomneyDa @sestinj — follows the same pattern as the z.AI provider PR (#10638). Happy to address any feedback!

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Summary by cubic

Add Avian as an OpenAI-compatible LLM provider with streaming and tool calling for DeepSeek V3.2, Kimi K2.5, GLM-5, and MiniMax M2.5. Includes UI, docs, and a trailing-slash base URL fix in the OpenAI adapter.

• New Features

  • Implemented Avian via OpenAI adapter (apiBase https://api.avian.io/v1/); added LLM class and autodetect.
  • Enabled tool/function calling for supported Avian models.
  • Added provider card, API key input, logo, and four model packages in Add New Model.
  • Added llm-info metadata and a docs page with a sidebar entry.

• Migration

  • Set AVIAN_API_KEY or enter it in the UI.
  • Configure models with provider: avian (e.g., deepseek/deepseek-v3.2).

^{Written for commit eb83948. Summary will update on new commits.}

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[cubic-dev-ai]

1 issue found across 13 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="packages/openai-adapters/src/index.ts">

<violation number="1" location="packages/openai-adapters/src/index.ts:107">
P2: Inconsistent trailing slash in Avian base URL - should use `/v1/` to match other providers and prevent endpoint resolution issues</violation>
</file>

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[avianion]

I have read the CLA Document and I hereby sign the CLA

[avianion]

Fixed the trailing slash issue flagged by cubic-dev — updated base URL to https://api.avian.io/v1/ for consistency with other providers (f3345db).

[avianion]

Friendly follow-up — this PR is still active and ready for review. Would appreciate a look when you get a chance! cc @sestinj

[avianion]

Friendly follow-up — this PR is still active and ready for review. All feedback has been addressed. Would appreciate a look when you get a chance! cc @sestinj

[avianion]

Hey @sestinj @RomneyDa — friendly follow-up on this PR. Avian is an OpenAI-compatible inference provider that's already live and powering apps like ISEKAI ZERO. This is a lightweight integration (standard OpenAI-compatible endpoint) and we're happy to address any feedback or make adjustments. Would love to get this merged if you have a moment to review. Thanks!