feat(mods): expose contextual field items

docs/mod-api-gen2-compat.md

@@ -240,7 +240,7 @@ resolves to the weaker claim:
 | `warned` | present, answers nil or degrades, and names itself once with the mod attributed |
 | `absent` | deliberately not served; a nil read is the honest failure |
 
-Today that is 288 backed, 32 warned and 161 absent across the fifteen modules.
+Today that is 291 backed, 32 warned and 161 absent across the fifteen modules.
 `notes` keys are documentation topics rather than a member list -- dotted paths
 (`save.money`), field names (`warpAt`), hook names (`hook ui.pc.items`) and
 bare topics (`identity`, `iteration`, `rawset`) all appear there. `members` is
@@ -486,6 +486,9 @@ has its own entry points for (`start_battle "wild" species level`, `warp`,
 **by name, before the first row runs**, so a mod never gets a half-run queue.
 `marchInPlace` still has no Gen 2 equivalent (the Gen 2 movement stream has no
 byte for it) and returns `nil, reason` rather than approximating one.
+`availableFieldActions` and `useFieldAction` expose the same contextual
+bicycle and fishing records in both games. Each engine keeps ownership of its
+inventory, terrain, surfing, bike, and fishing rules.
 
 **Hooks and events that fire on Gold.** Every name below is the Gen 1 name
 carrying the Gen 1 payload keys, because Gold's call sites reuse them rather