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It implements transparent TCP proxying with PostgreSQL wire protocol support with human readable messages to help claude/cursor understand how to better make DB calls.\n\n## Features\n\n- **Query Interception**: Analyzes all SQL queries before they reach your database\n- **Row-Level Damage Limiting**: Blocks DELETE/UPDATE operations that would affect too many rows\n- **Dangerous Query Blocking**: Prevents DROP, TRUNCATE, and WHERE-less DELETE operations\n- **Honeytoken Protection**: Detects and blocks access to canary tables\n- **Mock Snapshots**: Logs backup points before destructive operations\n- **Structured Logging**: Clear, parseable logs for monitoring and debugging\n- **Human Readable Errors**: Tells claude/cursor how to change its query to pass the proxy\n\n## Quick Start\n\n```bash\ncargo install pg_guard\n\npg_guard \\\n  --listen 0.0.0.0:6543 \\\n  --db-url postgres://postgres:postgres@localhost:5432/postgres \\\n  --max-rows 500 \\\n  --strict\n```\n\n## Safety Features\n\n### 1. Dangerous Query Blocking\n\n```sql\n-- ❌ BLOCKED: These queries are automatically blocked\nDROP TABLE users;\nTRUNCATE users;\nDELETE FROM users;  -- No WHERE clause\n```\n\n### 2. Row-Level Damage Limiting\n\n```sql\n-- ✅ ALLOWED: Affects few rows\nDELETE FROM users WHERE id = 123;\n\n-- ❌ BLOCKED: Would affect 1000+ rows (exceeds --max-rows limit)\nDELETE FROM users WHERE created_at \u003c '2020-01-01';\n```\n\n### 3. Honeytoken Detection\n\n```sql\n-- ❌ BLOCKED: Any access to canary tables\nSELECT * FROM _pg_guard_canary;\n```\n\n### 4. Snapshot Logging\n\nBefore allowing destructive operations, pg_guard logs:\n```\n[snapshot] Would take backup here\n[ALLOW] DELETE FROM users WHERE role = 'inactive' → 12 rows\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjonaylor89%2Fpg_guard","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjonaylor89%2Fpg_guard","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjonaylor89%2Fpg_guard/lists"}