chore: rebrand companion-os to clanker-agent

- Rename all package names from companion-* to clanker-*
- Update npm scopes from @mariozechner to @harivansh-afk
- Rename config directories .companion -> .clanker
- Rename environment variables COMPANION_* -> CLANKER_*
- Update all documentation, README files, and install scripts
- Rename package directories (companion-channels, companion-grind, companion-teams)
- Update GitHub URLs to harivansh-afk/clanker-agent
- Preserve full git history from companion-cloud monorepo

packages/ai/src/cli.ts

@@ -78,7 +78,7 @@ async function main(): Promise<void> {
     const providerList = PROVIDERS.map(
       (p) => `  ${p.id.padEnd(20)} ${p.name}`,
     ).join("\n");
-    console.log(`Usage: npx @mariozechner/companion-ai <command> [provider]
+    console.log(`Usage: npx @mariozechner/clanker-ai <command> [provider]
 
 Commands:
   login [provider]  Login to an OAuth provider
@@ -88,9 +88,9 @@ Providers:
 ${providerList}
 
 Examples:
-  npx @mariozechner/companion-ai login              # interactive provider selection
-  npx @mariozechner/companion-ai login anthropic    # login to specific provider
-  npx @mariozechner/companion-ai list               # list providers
+  npx @mariozechner/clanker-ai login              # interactive provider selection
+  npx @mariozechner/clanker-ai login anthropic    # login to specific provider
+  npx @mariozechner/clanker-ai list               # list providers
 `);
     return;
   }
@@ -131,7 +131,7 @@ Examples:
     if (!PROVIDERS.some((p) => p.id === provider)) {
       console.error(`Unknown provider: ${provider}`);
       console.error(
-        `Use 'npx @mariozechner/companion-ai list' to see available providers`,
+        `Use 'npx @mariozechner/clanker-ai list' to see available providers`,
       );
       process.exit(1);
     }
@@ -142,7 +142,7 @@ Examples:
   }
 
   console.error(`Unknown command: ${command}`);
-  console.error(`Use 'npx @mariozechner/companion-ai --help' for usage`);
+  console.error(`Use 'npx @mariozechner/clanker-ai --help' for usage`);
   process.exit(1);
 }
 

packages/ai/src/providers/amazon-bedrock.ts

@@ -514,7 +514,7 @@ function mapThinkingLevelToEffort(
 
 /**
  * Resolve cache retention preference.
- * Defaults to "short" and uses COMPANION_CACHE_RETENTION for backward compatibility.
+ * Defaults to "short" and uses CLANKER_CACHE_RETENTION for backward compatibility.
  */
 function resolveCacheRetention(
   cacheRetention?: CacheRetention,
@@ -524,7 +524,7 @@ function resolveCacheRetention(
   }
   if (
     typeof process !== "undefined" &&
-    process.env.COMPANION_CACHE_RETENTION === "long"
+    process.env.CLANKER_CACHE_RETENTION === "long"
   ) {
     return "long";
   }

packages/ai/src/providers/anthropic.ts

@@ -40,7 +40,7 @@ import { transformMessages } from "./transform-messages.js";
 
 /**
  * Resolve cache retention preference.
- * Defaults to "short" and uses COMPANION_CACHE_RETENTION for backward compatibility.
+ * Defaults to "short" and uses CLANKER_CACHE_RETENTION for backward compatibility.
  */
 function resolveCacheRetention(
   cacheRetention?: CacheRetention,
@@ -50,7 +50,7 @@ function resolveCacheRetention(
   }
   if (
     typeof process !== "undefined" &&
-    process.env.COMPANION_CACHE_RETENTION === "long"
+    process.env.CLANKER_CACHE_RETENTION === "long"
   ) {
     return "long";
   }

packages/ai/src/providers/google-gemini-cli.ts

@@ -88,7 +88,7 @@ const DEFAULT_ANTIGRAVITY_VERSION = "1.18.3";
 
 function getAntigravityHeaders() {
   const version =
-    process.env.COMPANION_AI_ANTIGRAVITY_VERSION || DEFAULT_ANTIGRAVITY_VERSION;
+    process.env.CLANKER_AI_ANTIGRAVITY_VERSION || DEFAULT_ANTIGRAVITY_VERSION;
   return {
     "User-Agent": `antigravity/${version} darwin/arm64`,
   };
@@ -1040,8 +1040,8 @@ export function buildRequest(
     model: model.id,
     request,
     ...(isAntigravity ? { requestType: "agent" } : {}),
-    userAgent: isAntigravity ? "antigravity" : "companion-coding-agent",
-    requestId: `${isAntigravity ? "agent" : "companion"}-${Date.now()}-${Math.random().toString(36).slice(2, 11)}`,
+    userAgent: isAntigravity ? "antigravity" : "clanker-coding-agent",
+    requestId: `${isAntigravity ? "agent" : "clanker"}-${Date.now()}-${Math.random().toString(36).slice(2, 11)}`,
   };
 }
 

packages/ai/src/providers/openai-codex-responses.ts

@@ -997,10 +997,10 @@ function buildHeaders(
   headers.set("Authorization", `Bearer ${token}`);
   headers.set("chatgpt-account-id", accountId);
   headers.set("OpenAI-Beta", "responses=experimental");
-  headers.set("originator", "companion");
+  headers.set("originator", "clanker");
   const userAgent = _os
-    ? `companion (${_os.platform()} ${_os.release()}; ${_os.arch()})`
-    : "companion (browser)";
+    ? `clanker (${_os.platform()} ${_os.release()}; ${_os.arch()})`
+    : "clanker (browser)";
   headers.set("User-Agent", userAgent);
   headers.set("accept", "text/event-stream");
   headers.set("content-type", "application/json");

packages/ai/src/providers/openai-responses.ts

@@ -33,7 +33,7 @@ const OPENAI_TOOL_CALL_PROVIDERS = new Set([
 
 /**
  * Resolve cache retention preference.
- * Defaults to "short" and uses COMPANION_CACHE_RETENTION for backward compatibility.
+ * Defaults to "short" and uses CLANKER_CACHE_RETENTION for backward compatibility.
  */
 function resolveCacheRetention(
   cacheRetention?: CacheRetention,
@@ -43,7 +43,7 @@ function resolveCacheRetention(
   }
   if (
     typeof process !== "undefined" &&
-    process.env.COMPANION_CACHE_RETENTION === "long"
+    process.env.CLANKER_CACHE_RETENTION === "long"
   ) {
     return "long";
   }

packages/ai/src/types.ts

@@ -283,7 +283,7 @@ export interface OpenAICompletionsCompat {
   supportsDeveloperRole?: boolean;
   /** Whether the provider supports `reasoning_effort`. Default: auto-detected from URL. */
   supportsReasoningEffort?: boolean;
-  /** Optional mapping from companion-ai reasoning levels to provider/model-specific `reasoning_effort` values. */
+  /** Optional mapping from clanker-ai reasoning levels to provider/model-specific `reasoning_effort` values. */
   reasoningEffortMap?: Partial<Record<ThinkingLevel, string>>;
   /** Whether the provider supports `stream_options: { include_usage: true }` for token usage in streaming responses. Default: true. */
   supportsUsageInStreaming?: boolean;

packages/ai/src/utils/oauth/openai-codex.ts

@@ -216,7 +216,7 @@ async function refreshAccessToken(refreshToken: string): Promise<TokenResult> {
 }
 
 async function createAuthorizationFlow(
-  originator: string = "companion",
+  originator: string = "clanker",
 ): Promise<{ verifier: string; state: string; url: string }> {
   const { verifier, challenge } = await generatePKCE();
   const state = createState();
@@ -337,7 +337,7 @@ function getAccountId(accessToken: string): string | null {
  * @param options.onManualCodeInput - Optional promise that resolves with user-pasted code.
  *                                    Races with browser callback - whichever completes first wins.
  *                                    Useful for showing paste input immediately alongside browser flow.
- * @param options.originator - OAuth originator parameter (defaults to "companion")
+ * @param options.originator - OAuth originator parameter (defaults to "clanker")
  */
 export async function loginOpenAICodex(options: {
   onAuth: (info: { url: string; instructions?: string }) => void;