# 01 — Product Vision

## Status

```text
PRODUCT_VISION=FROZEN_TARGET
```

## Authority

`docs/product/product_definition.md` is the product authority.

## REQUIRED_PRODUCT_TARGET

Lardon3D is a persistent, incremental, resource-aware Linux photogrammetry system controlled primarily by an ncurses TUI, with a required companion graphical viewer.

The product must let a user:

- create and reopen durable projects;
- ingest traceable still, future live-device, and video-derived captures;
- manage camera/lens/optical configurations without code changes for ordinary equipment;
- reach explicit calibration readiness;
- execute the existing scientific pre-SfM and Sparse SfM pipeline without invented science;
- produce durable Dense/MVS, mesh, refinement, texturing and exports;
- inspect sparse/dense/mesh/texture and camera evidence;
- analyze coverage;
- receive actionable supplementary-capture guidance;
- use live A6000 HDMI and S21 acquisition adapters without forking the scientific pipeline;
- restart after crashes/reboots without hidden transient knowledge.

## Principles

```text
SCIENTIFIC_TRACEABILITY=REQUIRED
DETERMINISM=REQUIRED
PERSISTENT_PROGRESS=REQUIRED
ATOMIC_PUBLICATION=REQUIRED
BOUNDED_EXECUTION=REQUIRED
MAXIMUM_SAFE_USEFUL_THROUGHPUT=REQUIRED
SERIALISM_REQUIRES_PROOF=REQUIRED
NO_SILENT_SCIENTIFIC_SUBSTITUTION=REQUIRED
NO_DESTRUCTIVE_AUTOMATION=REQUIRED
```

The system must expose uncertainty rather than replace it with guesses.

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