feat(providers): add Opper

README.md

@@ -126,7 +126,7 @@ preview `ollama launch webbrain --model <model>` handoff. Details:
 **Cloud APIs** — OpenAI, Anthropic Claude, Google Gemini, Azure OpenAI, AWS
 Bedrock, Mistral, DeepSeek, xAI Grok, MiniMax, Kimi, Qwen, z.ai GLM, Groq,
 Together, Cloudflare, Nvidia NIM, Hugging Face, Fireworks, OpenRouter, and more.
-The Providers page ships **115 built-in provider cards on Chromium** (114 on Firefox),
+The Providers page ships **116 built-in provider cards on Chromium** (115 on Firefox),
 including an endpoint-free local WebGPU option with the tested LFM2.5 2.6B
 preset and an experimental custom Hugging Face ONNX repository option —
 see the [full catalog](docs/providers-and-models.md#extended-provider-catalog).

docs/providers-and-models.md

@@ -506,18 +506,18 @@ times the standard rate.
 
 ### Extended provider catalog
 
-WebBrain also ships 81 disabled-by-default provider cards. Most are sourced
+WebBrain also ships 82 disabled-by-default provider cards. Most are sourced
 from the OpenCode provider catalog snapshot at commit
 `62e4641235d7847dadc60da37cca8a023dd54fc1`; provider-specific additions use
 their official API documentation. Together with the original cards, the
-Providers page lists **115 built-in providers on Chromium** and **114 on Firefox**; the
+Providers page lists **116 built-in providers on Chromium** and **115 on Firefox**; the
 difference is the Chromium-only in-browser WebGPU runtime.
 
 | IDs                                                                                                                                                                                                                                                                                                                        |
 | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `302ai`, `abacus`, `aihubmix`, `alibaba-coding-plan`, `alibaba-coding-plan-cn`, `azure-cognitive-services`, `bailing`, `baseten`, `berget`, `cerebras`, `cheaperinference`, `chutes`, `clarifai`, `cloudferro-sherlock`, `cohere`, `cortecs`, `deepinfra`, `digitalocean`, `dinference`, `drun`, `evroc`, `fastrouter`, `friendli` |
 | `freebuff2api`, `google-vertex`, `google-vertex-anthropic`, `helicone`, `iflowcn`, `inception`, `inference`, `io-net`, `jiekou`, `kilo`, `kimi-for-coding`, `kuae-cloud-coding-plan`, `llama`, `lucidquery`, `meganova`, `minimax-cn-coding-plan`, `minimax-coding-plan`, `moark`, `modelscope`, `morph`                       |
-| `nano-gpt`, `nearai`, `nebius`, `nova`, `novita-ai`, `ollama-cloud`, `opencode`, `opencode-go`, `orcarouter`, `ovhcloud`, `perplexity`, `perplexity-agent`, `poe`, `pollinations`, `privatemode-ai`, `qihang-ai`, `qiniu-ai`, `requesty`, `scaleway`, `siliconflow`, `siliconflow-cn`, `stackit`                               |
+| `nano-gpt`, `nearai`, `nebius`, `nova`, `novita-ai`, `ollama-cloud`, `opencode`, `opencode-go`, `opper`, `orcarouter`, `ovhcloud`, `perplexity`, `perplexity-agent`, `poe`, `pollinations`, `privatemode-ai`, `qihang-ai`, `qiniu-ai`, `requesty`, `scaleway`, `siliconflow`, `siliconflow-cn`, `stackit`                      |
 | `stepfun`, `submodel`, `synthetic`, `tencent-coding-plan`, `upstage`, `v0`, `venice`, `vercel`, `vivgrid`, `vultr`, `wandb`, `xiaomi`, `zai-coding-plan`, `zenmux`, `zhipuai`, `zhipuai-coding-plan`                                                                                                                       |
 
 Most use the OpenAI-compatible Chat Completions contract and bearer API keys.
@@ -584,6 +584,21 @@ into the card, keep the default `gpt-5.4-mini` model (400000 tokens), then
 click **Test Connection**. Interactive Ask streaming, tool calls, and vision
 work through the existing OpenAI-compatible path.
 
+#### Opper
+
+[Opper](https://opper.ai) is an EU-hosted, OpenAI-compatible AI gateway at
+`https://api.opper.ai/v3/compat`. One API key gives access to 700+ models from
+50+ providers; model IDs are bare pool names (such as `gpt-5.4-mini`,
+`claude-sonnet-4-6`, `gemini-3.8-flash`, and `deepseek-v4-flash`), and a
+`provider/model` ID such as `anthropic/claude-sonnet-4-6` pins one route. See
+the [docs](https://docs.opper.ai).
+
+In WebBrain, open **Providers -> LLM -> Opper**. Create an API key at
+[platform.opper.ai](https://platform.opper.ai), paste it into the card, keep
+the default `gpt-5.4-mini` model (400000 tokens), then click **Test
+Connection**. Interactive Ask streaming, tool calls, and vision work through
+the existing OpenAI-compatible path.
+
 ### Ask response streaming
 
 Providers with `supportsAskStreaming` stream visible text during interactive

src/chrome/icons/providers/SOURCES.md

@@ -20,6 +20,7 @@ Most brand marks come from [Lobe Icons](https://github.com/lobehub/lobe-icons)
 | orcarouter | OrcaRouter official docs favicon (`Continuum-AI-Corp/docs`, MIT) |
 | nearai | WebBrain-authored simple N mark (not an official NEAR brand asset) |
 | cheaperinference | Cheaper Inference logo mark (cheaperinference.com) |
+| opper | Opper official logo mark (opper.ai) |
 
 Brand trademarks remain property of their owners; used only for provider identification in the settings UI.
 

src/firefox/icons/providers/SOURCES.md

@@ -20,6 +20,7 @@ Most brand marks come from [Lobe Icons](https://github.com/lobehub/lobe-icons)
 | orcarouter | OrcaRouter official docs favicon (`Continuum-AI-Corp/docs`, MIT) |
 | nearai | WebBrain-authored simple N mark (not an official NEAR brand asset) |
 | cheaperinference | Cheaper Inference logo mark (cheaperinference.com) |
+| opper | Opper official logo mark (opper.ai) |
 
 Brand trademarks remain property of their owners; used only for provider identification in the settings UI.
 

test/run.js

@@ -76465,15 +76465,15 @@ test('extended provider catalog is complete, mirrored, safe, and excluded-provid
     iflowcn inception inference io-net jiekou kilo kimi-for-coding
     kuae-cloud-coding-plan llama lucidquery meganova minimax-cn-coding-plan
     minimax-coding-plan moark modelscope morph nano-gpt nearai nebius nova novita-ai
-    ollama-cloud opencode opencode-go orcarouter ovhcloud perplexity
+    ollama-cloud opencode opencode-go opper orcarouter ovhcloud perplexity
     perplexity-agent poe pollinations privatemode-ai qihang-ai qiniu-ai requesty scaleway siliconflow
     siliconflow-cn stackit stepfun submodel synthetic tencent-coding-plan
     upstage v0 venice vercel vivgrid vultr wandb xiaomi zai-coding-plan zenmux
     zhipuai zhipuai-coding-plan
   `.trim().split(/\s+/);
   const excluded = ['github-models', 'github-copilot', 'gitlab', 'sap-ai-core'];
 
-  assert.equal(expectedIds.length, 81);
+  assert.equal(expectedIds.length, 82);
   assert.deepEqual(ProviderCatalogCh.ADDITIONAL_PROVIDER_IDS, expectedIds);
   assert.deepEqual(ProviderCatalogFx.ADDITIONAL_PROVIDER_IDS, expectedIds);
   assert.deepEqual(
@@ -76488,8 +76488,8 @@ test('extended provider catalog is complete, mirrored, safe, and excluded-provid
   ]) {
     const defaults = new PM()._defaultConfigs();
     // Includes the sidepanel-only WebBrain Compass XL runtime profile, which is
-    // deliberately omitted from the 115/114 Settings provider cards.
-    const expectedDefaultCount = label === 'chrome' ? 116 : 115;
+    // deliberately omitted from the 116/115 Settings provider cards.
+    const expectedDefaultCount = label === 'chrome' ? 117 : 116;
     assert.equal(
       Object.keys(defaults).length,
       expectedDefaultCount,
@@ -76636,6 +76636,30 @@ test('extended provider catalog is complete, mirrored, safe, and excluded-provid
     ProviderCatalogCh.ADDITIONAL_PROVIDER_UI.cheaperinference.suggestions,
     ['gpt-5.4-mini', 'claude-sonnet-5', 'gemini-3.5-flash', 'deepseek-v4-flash'],
   );
+  assert.deepEqual(
+    {
+      baseUrl: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.baseUrl,
+      model: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.model,
+      contextWindow: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.contextWindow,
+      supportsVision: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.supportsVision,
+      supportsTools: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.supportsTools,
+      supportsAskStreaming: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.supportsAskStreaming,
+      apiKeyUrl: ProviderCatalogCh.ADDITIONAL_PROVIDER_DEFAULTS.opper.apiKeyUrl,
+    },
+    {
+      baseUrl: 'https://api.opper.ai/v3/compat',
+      model: 'gpt-5.4-mini',
+      contextWindow: 400000,
+      supportsVision: true,
+      supportsTools: true,
+      supportsAskStreaming: true,
+      apiKeyUrl: 'https://platform.opper.ai',
+    },
+  );
+  assert.deepEqual(
+    ProviderCatalogCh.ADDITIONAL_PROVIDER_UI.opper.suggestions,
+    ['gpt-5.4-mini', 'claude-sonnet-4-6', 'gemini-3.8-flash', 'deepseek-v4-flash'],
+  );
   assert.deepEqual(
     ProviderCatalogCh.ADDITIONAL_PROVIDER_UI['kimi-for-coding'].suggestions,
     ['kimi-for-coding', 'kimi-for-coding-highspeed', 'k3'],