---
name: site-chapter
description: Write the terrain chapter of a report (situation, geology, groundwater, boreholes, hazards, constraints) from a Stratta site sheet, one sentence per fact with its source and date, register answers kept apart from design values. Trigger phrases: "chapitre terrain", "chapitre situation", "decris le site", "site chapter", "conditions du terrain".
---

# Terrain chapter

Use this skill when the user needs the part of a report that describes the site: the
geotechnical report's situation chapter, the terrain chapter of a project basis, the
site paragraph of an offer. The site sheet already holds what the public registers say,
with a source and a date on each fact; the chapter is that sheet, written in prose,
without adding a single value.

Do not use it to interpret the ground (a retained soil parameter is a decision of the
dossier, not a fact of the sheet), and do not use it when the dossier has no site: say
so and offer `scan_site`.

## Before writing

1. `list_skills`: an office version named `site-chapter` replaces this one.
2. `load_dossier`, then `get_site_context` on its `siteId`. When the chapter needs the
   boreholes, `get_boreholes` (nearest first; `withStrataOnly` when only logged strata
   matter).

## What to produce

Markdown, in the user's language, ordered as the sheet is: situation (address, parcel,
elevation), geology, boreholes and groundwater, natural hazards, contamination and water
protection, other constraints (noise, radon, zoning, forest), actions (seismic zone and
ground class, snow, wind).

One sentence per fact, then its provenance in brackets: the register that answered, the
date of the answer, and the clause when the fact carries one:

- `established`: state it. "La parcelle repose sur des alluvions recentes (cadastre
  geologique VD, 2026-09-14)."
- `indicative`: state it with the reserve the register itself puts on it, and mark
  `[A confirmer]`. "La classe de sol de fondation indiquee par la carte est C, carte non
  precise a l'echelle de la parcelle (SIA 261 §16.2, p. 51) [A confirmer par sondage]."
- `uncovered`: say the register did not answer, in one line, marked `[A etablir]`.

For boreholes: their number in the radius, the nearest with its distance and depth, how
many have logged strata, the measured water levels with their dates. No interpolation
between boreholes: the sheet's cross-section is an interpretation and says so.

## Rules

- A fact of the sheet is a register's answer. It never becomes a design value in this
  chapter; if the dossier retained one, cite the decision `(#xxxxxx)` in a separate
  sentence.
- Keep the date. A fact without its date reads as permanent, and a cadastre changes.
- Do not complete a missing topic from general knowledge of the region.
- Do not conclude on the feasibility of the structure.

## After drafting

Name the `[A etablir]` and `[A confirmer]` items in one list, with what would settle each
(a borehole, a cantonal request, a site visit).