Aggregate the whole suite wiki onto the Institution page

Wiki/Home.md is the suite's front door; every layer's wiki now mirrors here
under Wiki/<layer>/ (core, contraband, justice, gangs, ward), so the whole
suite reads in one place with the index linking to the local pages. The
layer repos stay canonical -- Tools/sync-wiki.sh refreshes the aggregated
copy on demand. The README's main page points to it.

Wiki/core/Home.md

@@ -0,0 +1,88 @@
+# Institution: Core — Wiki
+
+*The shared foundation of the **Institution** suite: a set of RimWorld 1.6 mods about what an
+institution does to the people inside it, and the crime, policing, and justice that put them there.*
+
+Core is the engine every other Institution mod runs on. **On its own it changes nothing you can
+see** — no items, no jobs, no UI, no XML. It ships one small assembly and is completely inert until
+another Institution mod is installed on top of it. You install Core only because something else asks
+for it.
+
+This wiki documents what that engine actually computes, down to the exact numbers.
+
+---
+
+## The one idea
+
+> **Every pawn has a criminal propensity on a spectrum — nature (traits) × nurture (circumstance,
+> mood, treatment) — and the colony can police it.**
+
+That single sentence is the whole suite. Colonists, prisoners, and slaves drift toward crime on a
+continuous spectrum; a policing and justice layer discovers, catches, punishes, reforms, or paroles
+them. Core is where the *spectrum* lives as code — before anyone is caught, before there is a record
+to read, before there is a warden to search them.
+
+## Why a shared engine
+
+The propensity idea did not start abstract. It was written twice, concretely, in two different mods:
+the piss spree's `WouldFoulPeople` (which drunk, miserable pawn starts a mess) and the breakout's
+`WouldArmSelf` (which prisoner whittles a shiv when the door opens). Both asked the same real
+question — *would **this** pawn do it?* — and both answered it their own way.
+
+Core exists so they stop disagreeing. When the contraband system, the justice system, and the gang
+system all read one disposition engine, they agree about who is dangerous instead of each computing
+it from scratch and drifting apart. One pawn who is "the scary one" is the scary one to every module
+at once. That coherence — not any single number — is the point of a shared substrate.
+
+Core carries exactly the three things every Institution mod reads and none should own alone, and
+nothing else:
+
+| Pillar | Class | Answers | Page |
+|---|---|---|---|
+| **Propensity** | `Propensity` | *Would this pawn do it?* (nature × nurture, seeded) | [Propensity](Propensity.md) |
+| **Criminal record** | `CriminalRecord` | *What has this pawn actually done?* (one per-pawn history) | [Criminal Record](Criminal-Record.md) |
+| **Secured context** | `SecuredContexts` | *What kind of hold is this pawn under, and who may search them?* | [Secured Context](Secured-Context.md) |
+
+The distinction between the first two is the spine of the whole design: **propensity is suspicion, a
+record is fact.** Propensity says "this pawn *seems* dangerous"; a record says "this pawn *has*
+escaped twice and shanked a guard." Keeping them separate is what lets the colony act on evidence
+instead of on vibes.
+
+## The pages of this wiki
+
+- **[Propensity](Propensity.md)** — nature × nurture in full: the trait-weight table, the nurture
+  multiplier ladder, the `Would()` formula with worked examples, and why the roll is seeded per pawn.
+- **[Criminal Record](Criminal-Record.md)** — every field, who writes and reads each, the
+  `For` vs `PeekFor` distinction, how it persists, and why `reform` is the pivot of the suite.
+- **[Secured Context](Secured-Context.md)** — the Free / Prisoner / Slave kinds, `Of()` and
+  `OnMap()`, `IsHeld` vs `CanConceal`, and why the suite keys off this instead of "prisoner."
+- **[Treatment Engine](Treatment-Engine.md)** — the shared rehabilitation maths: mark a condition
+  treatable, reduce it by skill × facility quality per session, and build a recovery track toward
+  discharge. Ward's psychiatric care and Justice's reform share this one engine.
+- **[Modder API](Modder-API.md)** — the public surface any mod can call, and the one seam
+  (`Propensity.DeterrenceFactor`) that lets a justice layer feed back into disposition without Core
+  ever depending on it.
+
+## The suite
+
+Each mod stands alone as an install; together they form one system. Core is the leaf everything else
+depends on.
+
+| Mod | What it adds | Needs |
+|---|---|---|
+| **Institution: Core** (this) | the propensity / record / context engine | base game only |
+| **Institution: Contraband** | concealment, improvised shivs, tunnels, warden search, warden corruption | Core |
+| **Institution: Justice** | classification, deterrence, discipline, parole, regime, and **policing** (colony crime → weighed arrest) | Core, Harmony |
+| **Institution: Gangs** | gangs as contraband economies: joining, smuggling, rivalry, fights-as-crime | Core, Contraband, Justice |
+| **Institution: Ward** | psychiatric care — a prisoner treated, not punished, on Core's treatment engine | Core, Harmony |
+| **Foul Play** | the vessel + substance + throw framework, home of the "Piss Nuke" | standalone; bridges to Core + Contraband |
+
+## Requirements & load order
+
+- **RimWorld 1.6.** Core references only the base game — no Harmony, no DLC, no other mod.
+- Load Core **before** any other Institution mod (`loadAfter` Ludeon.RimWorld only).
+- `packageId`: `flan.institution.core`.
+
+---
+
+*Part of the **Institution** suite. AI disclosure: developed with substantial assistance from Claude (Anthropic).*