# Implementation Plan: [FEATURE]

**Branch**: `[###-feature-name]` | **Date**: [DATE] | **Spec**: [link]
**Input**: Feature specification from `/specs/[###-feature-name]/spec.md`

**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/plan-template.md` for the execution workflow.

## Summary

Restructure the SQL commands reference documentation into logical categories (DDL, DML, Transactions, etc.) with dedicated pages per command, and add client-side generated SVG railroad syntax diagrams to each page using the DuckDB railroad-diagrams JavaScript library.

## Technical Context

**Language/Version**: Markdown (Documentation), JavaScript (for railroad diagrams), potentially Python/Rust (for doc generation tooling if applicable to the existing setup)
**Primary Dependencies**: `railroad-diagrams` (from DuckDB's implementation or similar CC0 library)
**Testing**: Link verification, visual inspection of diagram rendering.
**Target Platform**: Web (Documentation Site)
**Performance Goals**: Fast client-side rendering of diagrams.
**Constraints**: Diagrams must accurately reflect the Oxibase SQL dialect.

## Constitution Check

*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*

- [x] **Mainframe Monolith**: Does this maintain the embedded/monolith architecture? (Yes, it's documentation and client-side JS)
- [x] **ACID & MVCC**: Does this change respect multi-version concurrency control and strict data integrity? (N/A, documentation only)
- [x] **Memory Efficiency**: Does this avoid unnecessary allocations (e.g., `Vec` clones)? (N/A, documentation only)
- [x] **Safe Rust**: Are errors properly propagated? (N/A, documentation only)
- [x] **Tests First**: Will this be covered by tests that can be verified via `cargo nextest`? (No, documentation change. Will be verified via doc build tools or manually).

## Project Structure

### Documentation (this feature)

```text
specs/031-sql-railroad-diagrams/
├── plan.md              # This file (/speckit.plan command output)
├── research.md          # Phase 0 output (/speckit.plan command)
├── data-model.md        # Phase 1 output (/speckit.plan command)
├── quickstart.md        # Phase 1 output (/speckit.plan command)
└── tasks.md             # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
```

### Source Code (repository root)

```text
docs/
├── references/
│   └── sql_commands/  # Target for restructuring
│       ├── ddl/
│       ├── dml/
│       ├── transaction/
│       └── ...
js/                    # Or appropriate static assets folder
└── railroad/          # Directory for railroad-diagrams JS library and definitions
```

**Structure Decision**: This feature primarily impacts the `docs/` directory and whatever static assets directory is used for the documentation site.

## Complexity Tracking

> **Fill ONLY if Constitution Check has violations that must be justified**

| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| [e.g., Unsafe Code Used] | [Performance critical loop] | [Safe abstraction was measured to be X% slower in benchmark Y] |
| [e.g., Memory Allocation] | [External library requirement] | [No zero-copy alternatives exist for dependency Z] |
