1 files changed, 11 insertions, 29 deletions
diff --git a/building_guide/hacking.md b/building_guide/hacking.md
index dc4372b..b45363f 100644
--- a/building_guide/hacking.md
+++ b/building_guide/hacking.md
@@ -1,8 +1,8 @@
 ## Hacking
 
-Hacking minigames are played by jacking into terminal objects. Terminals are YAML objects that are registered in Go's `terminalDefs` map.
-
-**The filename is the ID** (`terminal_basic.yaml` → `terminal_basic`); like all objects, the loader derives the ID from the filename — don't add an `id:` field (see `objects.md`).
+Hacking minigames are played by jacking into terminal objects. Terminals are YAML
+objects; the filename is the ID (`terminal_basic.yaml` → `terminal_basic`), and
+like all objects you should not add an `id:` field (see `objects.md`).
 
 ### Terminal Object YAML
 
@@ -13,38 +13,20 @@ description: "A battered terminal with a cracked screen. {28}[Level 1 Hacking]{/
 inroom_description: "A {28}basic terminal{/} hums quietly against the wall."
 ```
 
-- `id` must match a key in `terminalDefs` (Go code in `internal/game/hacking.go`)
 - `name` is used for matching in the `jack` command
 - `color` controls the display color
 - `description` is shown when examining the terminal
 - `inroom_description` is shown in room listings
-- No `behavior` field — terminals are registered in Go, not YAML behaviors
-
-### Adding a New Terminal
-
-1. Create an object YAML file in `data/objects/terminal_<name>.yaml`
-2. Add an entry to `terminalDefs` in `internal/game/hacking.go`
-3. Optionally create a new minigame implementation in `internal/game/hacking_<name>.go`
-4. Place the terminal object in a room's `objects:` list
-
-### Adding a New Minigame
+- Terminals have no behavior block; each terminal corresponds to a minigame
+  registered in the game code
 
-New minigames implement the `HackingMinigame` interface:
+### Placing a Terminal
 
-```go
-type HackingMinigame interface {
-    Init(level int) string
-    HandleInput(input string) (output string, done bool, won bool)
-    Name() string
-}
-```
-
-Optionally implement `XPBonuser` for bonus XP:
+Add the terminal object to a room's `objects:` list:
 
-```go
-type XPBonuser interface {
-    BonusXP() int
-}
+```yaml
+objects:
+  - id: terminal_basic
 ```
 
-
+Adding a brand-new hacking minigame is an engine change, not a world-data change.