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/coding-agent/test/compaction-thinking-model.test.ts

@@ -11,8 +11,8 @@
 import { existsSync, mkdirSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { Agent, type ThinkingLevel } from "@mariozechner/companion-agent-core";
-import { getModel, type Model } from "@mariozechner/companion-ai";
+import { Agent, type ThinkingLevel } from "@mariozechner/clanker-agent-core";
+import { getModel, type Model } from "@mariozechner/clanker-ai";
 import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
 import { AgentSession } from "../src/core/agent-session.js";
 import { ModelRegistry } from "../src/core/model-registry.js";
@@ -45,7 +45,7 @@ describe.skipIf(!HAS_ANTIGRAVITY_AUTH)(
     });
 
     beforeEach(() => {
-      tempDir = join(tmpdir(), `companion-thinking-compaction-test-${Date.now()}`);
+      tempDir = join(tmpdir(), `clanker-thinking-compaction-test-${Date.now()}`);
       mkdirSync(tempDir, { recursive: true });
     });
 
@@ -156,7 +156,7 @@ describe.skipIf(!HAS_ANTHROPIC_AUTH)(
     beforeEach(() => {
       tempDir = join(
         tmpdir(),
-        `companion-thinking-compaction-anthropic-test-${Date.now()}`,
+        `clanker-thinking-compaction-anthropic-test-${Date.now()}`,
       );
       mkdirSync(tempDir, { recursive: true });
     });