# Mutation Response Rename - Phase Overview (v1.8.0)

## Goal
Rename `mutation_result_v2` to `mutation_response` - direct clean rename with no backward compatibility.

## Why This Rename?
- **Version suffix is awkward** - Implies there will be v3, v4, etc.
- **Not descriptive** - Doesn't convey semantic meaning
- **Professional naming** - Aligns with industry standards (Hasura pattern)
- **No users yet** - Can do clean rename without compatibility burden

## Strategy: Direct Rename (v1.8.0)

**Simple approach:**
- Replace `mutation_result_v2` → `mutation_response` everywhere
- No aliases, no deprecation notices
- Clean, professional naming from v1.8.0 forward

## Phase Structure

Each phase has its own detailed file with:
- Specific tasks
- Line-by-line changes
- Verification commands
- Acceptance criteria

### Phase Execution Order

```
Phase 0: Pre-Implementation Checklist
   ↓
Phase 1: PostgreSQL Migration Files (1 hour)
   ↓
Phase 2: Rust Layer Updates (1 hour)
   ↓
Phase 3: Python Layer Updates (1 hour)
   ↓
Phase 4: Documentation Updates (1 hour)
   ↓
Phase 5: Test Files Updates (1 hour)
   ↓
Phase 6: Final Verification (1 hour)
```

**Note:** Direct rename - no backward compatibility needed

## Files Overview

| Phase | File | Description |
|-------|------|-------------|
| 0 | `phase0_pre_implementation.md` | Setup, branching, backups |
| 1 | `phase1_postgresql.md` | Direct rename - no aliases |
| 2 | `phase2_rust.md` | Rust code documentation updates |
| 3 | `phase3_python.md` | Python code docstring updates |
| 4 | `phase4_documentation.md` | Clean documentation - no deprecation |
| 5 | `phase5_tests.md` | Update tests to new name |
| 6 | `phase6_verification.md` | Final checks and validation |

## Quick Start

```bash
# 1. Review the plan
cat .phases/mutation_response_rename/phase0_pre_implementation.md

# 2. Execute phases in order
# Follow each phase file step-by-step

# 3. Verify at each stage
# Each phase has verification commands
```

## Estimated Timeline

- **Optimistic**: 4 hours (half day)
- **Realistic**: 6 hours (3/4 day)
- **Pessimistic**: 8 hours (1 day)

## Success Criteria (v1.8.0)

- [ ] Zero `mutation_result_v2` references in codebase
- [ ] `mutation_response` used everywhere
- [ ] Migration file renamed from `005_add_mutation_result_v2.sql` to `005_add_mutation_response.sql`
- [ ] All helper functions return `mutation_response`
- [ ] Documentation uses `mutation_response`
- [ ] Examples updated to use `mutation_response`
- [ ] 100% test pass rate
- [ ] No type checking errors
- [ ] Clean git history

## Rollback Plan

If issues occur:
1. Return to `backup/before-mutation-response-rename` branch
2. Or revert specific phase commits
3. Detailed rollback instructions in main plan

## Related Documents

- Main plan: `.phases/mutation_response_rename_plan.md`
- Cascade plan: `.phases/cascade-mandatory-tracking-plan.md`

## Version Strategy

This implementation uses the **direct rename strategy**:

1. **v1.8.0** - Clean rename, no backward compatibility
2. No aliases, no deprecation warnings
3. Fresh start with professional naming

**Justification**: No external users = no compatibility burden.

---

**Status**: Ready for execution
**Version**: v1.8.0 (direct rename)
**Last Updated**: 2025-12-04
