Migrate to per-agent subdirectories, uniform 8-agent support, cross-platform fixes

- All paths use ~/.elydora/{agentId}/ per-agent isolation
- Add copilot, letta plugins; split kiro into kirocli + kiroide
- Remove augment (SDK-only agent, not one-click)
- Fix chmod to skip on Windows (platform check)
- Fix uninstall to filter by specific agentId
- Uniform 8 agents: claudecode, cursor, gemini, kirocli, kiroide, opencode, copilot, letta
- Update README agent table

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/plugins/kiroide.ts

@@ -0,0 +1,94 @@
+import fsp from 'node:fs/promises';
+import path from 'node:path';
+import os from 'node:os';
+import type { AgentPlugin, InstallConfig, PluginStatus } from './base.js';
+import { SUPPORTED_AGENTS } from './registry.js';
+
+const AGENT_KEY = 'kiroide';
+const entry = SUPPORTED_AGENTS.get(AGENT_KEY)!;
+
+function resolveConfigDir(): string {
+  // .kiro/hooks is project-relative, but for global install use home dir
+  return path.join(os.homedir(), entry.configDir);
+}
+
+function resolveConfigPath(): string {
+  return path.join(resolveConfigDir(), entry.configFile);
+}
+
+export const kiroidePlugin: AgentPlugin = {
+  async install(config: InstallConfig): Promise<void> {
+    const configDir = resolveConfigDir();
+    await fsp.mkdir(configDir, { recursive: true });
+
+    const configPath = resolveConfigPath();
+
+    const hookConfig = {
+      name: 'Elydora Audit',
+      description: 'Sends tool-use events to the Elydora tamper-evident audit platform',
+      version: '1.0.0',
+      hooks: {
+        pre_tool_use: {
+          command: `node "${config.guardScriptPath}"`,
+          timeout_ms: 5000,
+        },
+        post_tool_use: {
+          command: `node "${config.hookScriptPath}"`,
+          timeout_ms: 5000,
+        },
+      },
+    };
+
+    await fsp.writeFile(configPath, JSON.stringify(hookConfig, null, 2) + '\n', 'utf-8');
+  },
+
+  async uninstall(_agentId?: string): Promise<void> {
+    const configPath = resolveConfigPath();
+    try {
+      await fsp.unlink(configPath);
+    } catch {
+      // Already removed
+    }
+  },
+
+  async status(): Promise<PluginStatus> {
+    const configPath = resolveConfigPath();
+
+    let hookConfigured = false;
+    let hookScriptPath = '';
+    try {
+      const raw = await fsp.readFile(configPath, 'utf-8');
+      const config = JSON.parse(raw);
+      hookConfigured = !!(config.hooks && config.hooks.pre_tool_use && config.hooks.post_tool_use);
+
+      // Extract hook script path from post_tool_use command
+      if (hookConfigured && config.hooks.post_tool_use) {
+        const cmd = config.hooks.post_tool_use.command as string;
+        if (cmd && cmd.includes('elydora')) {
+          hookScriptPath = cmd.replace(/^node\s+"?/, '').replace(/"?\s*$/, '');
+        }
+      }
+    } catch {
+      // Config not readable
+    }
+
+    let hookScriptExists = false;
+    if (hookScriptPath) {
+      try {
+        await fsp.access(hookScriptPath);
+        hookScriptExists = true;
+      } catch {
+        // File doesn't exist
+      }
+    }
+
+    return {
+      installed: hookConfigured && hookScriptExists,
+      agentName: AGENT_KEY,
+      displayName: entry.name,
+      hookConfigured,
+      hookScriptExists,
+      configPath,
+    };
+  },
+};