fix(agentdb): add ESM __dirname polyfill to agentdb-cli.ts

[adambkovacs]

Summary

• Fixes the __dirname is not defined error in AgentDB CLI when running as an ES module
• Adds standard ESM polyfill using fileURLToPath and dirname from Node.js built-in modules

Problem

The agentic-flow/src/agentdb/cli/agentdb-cli.ts file uses __dirname (line 62) but runs as an ES module where __dirname is not available. This causes all MCP tools that rely on the CLI to fail:

❌ __dirname is not defined

Affected tools:

• agentdb_stats
• agentdb_pattern_store
• agentdb_pattern_search
• agentdb_pattern_stats

Solution

Added the standard ESM polyfill:

import { fileURLToPath } from 'url';
import { dirname } from 'path';

// ESM __dirname polyfill (required since ES modules don't have __dirname)
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

Note

The packages/agentdb/src/cli/agentdb-cli.ts already has this polyfill (line 35), but the agentic-flow/src/agentdb/cli/agentdb-cli.ts was missing it.

Test plan

• Verified MCP tools work after applying this fix locally
• agentdb_stats returns database statistics
• agentdb_pattern_store successfully stores episodes

Fixes #77

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