# Orcaflex Monolithic To Modular Section Mapping

> Sub-skill of orcaflex-monolithic-to-modular: Section Mapping (+2).

- Skill: `vamseeachanta/orcaflex-monolithic-to-modular-section-mapping` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/orcaflex-monolithic-to-modular-section-mapping`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/orcaflex-monolithic-to-modular-section-mapping/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/orcaflex-monolithic-to-modular-section-mapping

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# Section Mapping (+2)

## Section Mapping


The extractor uses three mapping dicts from `schema/generic.py`:

| Mapping | Purpose | Example |
|---------|---------|---------|
| `FIELD_TO_SECTION` | spec field → OrcaFlex YAML key | `"line_types"` → `"LineTypes"` |
| `SINGLETON_SECTIONS` | singleton section → field | `"FrictionCoefficients"` → `"friction_coefficients"` |
| `TYPED_FIELD_MAP` | typed field → OrcaFlex prop | `"mass"` → `"Mass"` |


## Section Name Aliases


OrcaFlex `SaveData()` exports may use different section names than the API:

| YAML Export Name | API/Internal Name |
|-----------------|-------------------|
| `Groups` | `BrowserGroups` |
| `FrictionCoefficients` | `SolidFrictionCoefficients` |

The extractor handles both via `_SECTION_ALIASES` fallback in `_extract_singleton()`.


## Object Extraction Strategy


For each object in a list section:
1. Keys in `TYPED_FIELD_MAP` → extracted as typed Pydantic fields
2. All other keys → placed in `properties` dict (pass-through bag)
3. Both recombined by builder's `_merge_object()` during generation