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description: "Harden code by improving type safety, runtime validation, logging, and error handling. Use when the user asks to harden, productionize, add validation, tighten types, or improve error handling. Keywords: harden, productionize, type safety, Zod validation, error handling, logging, defensive coding."
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# /xonovex-workflow:code-harden – Research Code Hardening Opportunities

Analyzes code for hardening opportunities (type safety, validation, logging, error handling). Generates a detailed research report. Does NOT create plans or make changes - run `/xonovex-workflow:plan-create` afterward to create an implementation plan.

## Goal

- Identify code quality issues (type safety, logging, validation, best practices, code smells)
- Apply fixes aligned with project standards
- Validate changes with typecheck, lint, and tests

## Core Workflow

**Use Task agents with subagent_type=Explore and model=haiku for codebase analysis. Do NOT use EnterPlanMode.**

1. **Read Guidelines**: Check CLAUDE.md, POLICY.md, AGENTS.md and referenced guidelines for project standards
2. **Analyze**: Use Task agent with subagent_type=Explore and model=haiku to find anti-patterns and violations; categorize by priority
3. **Report**: Generate detailed report of issues found, grouped by package and priority

## Implementation Details

**Find guidelines**: Look for CLAUDE.md, POLICY.md, AGENTS.md in project root and subdirectories; check @-referenced documents

**Apply standards**: Follow project-specific patterns from guidelines for type safety, logging, validation, error handling

**Validation**: Fix one package at a time; validate immediately after each

## Error Handling

- **Lint failures**: Review fix against project linting rules; adjust to match standards
- **Test failures**: Review logic errors, validation strictness, mock compatibility
- **Type errors**: Check imports, type definitions, schema alignment
- **Guidelines not found**: Search for coding standards documentation; use language/framework best practices

## Next Steps

After running this research command:

1. Review the hardening report for accuracy
2. Run `/xonovex-workflow:plan-create` to create an implementation plan from this research