feat(api): add Fireworks AI provider preset (#1543)

Promotes Fireworks AI to a first-class discoverable preset over the existing Anthropic-compatible Bearer path. Closes #890.

README.md

@@ -64,7 +64,7 @@ CCS gives you one stable command surface while letting you switch between:
 - OAuth providers like Codex, Kiro, Claude, Qwen, Kimi, and more, with legacy
   Copilot compatibility for existing setups
 - API and local-model profiles like GLM, Kimi, OpenRouter, Ollama, llama.cpp,
-  Novita, and Alibaba Coding Plan
+  Novita, Fireworks AI, and Alibaba Coding Plan
 
 The goal is simple: stop rewriting config files, stop breaking active sessions,
 and move between providers in seconds.

src/shared/provider-preset-catalog.ts

@@ -23,6 +23,7 @@ export const PROVIDER_PRESET_IDS = [
   'qwen',
   'ollama-cloud',
   'novita',
+  'fireworks',
 ] as const;
 
 export type ProviderPresetId = (typeof PROVIDER_PRESET_IDS)[number];
@@ -266,6 +267,19 @@ const RAW_PROVIDER_PRESET_DEFINITIONS: readonly ProviderPresetDefinition[] = [
     badge: 'Anthropic-compatible',
     icon: '/icons/novita.svg',
   },
+  {
+    id: 'fireworks',
+    name: 'Fireworks AI',
+    description: 'Anthropic-compatible inference (Kimi, Qwen, Llama) via api.fireworks.ai',
+    baseUrl: 'https://api.fireworks.ai/inference',
+    defaultProfileName: 'fireworks',
+    defaultModel: 'accounts/fireworks/models/kimi-k2p5',
+    apiKeyPlaceholder: 'fw_...',
+    apiKeyHint: 'Get your API key at fireworks.ai/api-keys',
+    category: 'alternative',
+    requiresApiKey: true,
+    badge: 'Anthropic-compatible',
+  },
 ];
 
 function clonePresetDefinition(preset: ProviderPresetDefinition): ProviderPresetDefinition {

tests/unit/api/provider-presets-fireworks.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from 'bun:test';
+import { getPresetById, isValidPresetId } from '../../../src/api/services/provider-presets';
+import { PROVIDER_PRESET_IDS } from '../../../src/shared/provider-preset-catalog';
+
+describe('provider-presets-fireworks', () => {
+  it('resolves fireworks preset id', () => {
+    const preset = getPresetById('fireworks');
+    expect(preset?.id).toBe('fireworks');
+    expect(preset?.baseUrl).toBe('https://api.fireworks.ai/inference');
+    expect(preset?.defaultProfileName).toBe('fireworks');
+  });
+
+  it('registers fireworks in PROVIDER_PRESET_IDS', () => {
+    expect(PROVIDER_PRESET_IDS).toContain('fireworks');
+  });
+
+  it('uses the Anthropic-compatible base URL without a /v1 suffix', () => {
+    const preset = getPresetById('fireworks');
+    expect(preset?.baseUrl).toBe('https://api.fireworks.ai/inference');
+    expect(preset?.baseUrl.endsWith('/v1')).toBe(false);
+  });
+
+  it('pins a fully-qualified Fireworks model id as default', () => {
+    const preset = getPresetById('fireworks');
+    expect(preset?.defaultModel).toMatch(/^accounts\/fireworks\/(models|routers)\//);
+  });
+
+  it('validates fireworks preset requires API key with the fw_ placeholder', () => {
+    const preset = getPresetById('fireworks');
+    expect(preset?.requiresApiKey).toBe(true);
+    expect(preset?.apiKeyPlaceholder).toBe('fw_...');
+  });
+
+  it('treats fireworks as a valid preset id', () => {
+    expect(isValidPresetId('fireworks')).toBe(true);
+  });
+
+  it('handles whitespace in fireworks preset id', () => {
+    const preset = getPresetById('  fireworks  ');
+    expect(preset?.id).toBe('fireworks');
+  });
+
+  it('handles uppercase fireworks preset id', () => {
+    const preset = getPresetById('FIREWORKS');
+    expect(preset?.id).toBe('fireworks');
+  });
+
+  it('does not resolve partial or invalid fireworks ids', () => {
+    expect(getPresetById('fireworks-invalid')).toBeUndefined();
+    expect(isValidPresetId('fireworks-invalid')).toBe(false);
+  });
+});