Good thread....Much the same...but....
In the car....
Tubeless tool box - sealant, tubes, syringe, valves etc
Birzman tool box - full ‘studio’ mobile workshop
Large Ikea carrier of weather gear, gloves, etc
Two made-up biking backpacks
Two pairs of spare cycling shoes - usually Five Tens
Track pump with new, fabulous Truflo pump head
In the backpacks...
Thin windproof or waterproof - usually ION or Rab - always
Neck tube - which doubles as Covid face mask
Tyre levers x2
Topeak Rocket micro pump
Topeak suspension pump
Multi-tool, extra 8mm Allen key, two spare chain connector links
Patch kit including alloy valve key
Two extra bolts - one for brake calipers and one for cleats - this can be life saving
Antiseptic wipes, plasters, pack of 200mg Iboprufen tablets - often used for friends
Two packs of Mountain Berry Blocs by Clif - all other flavours are officially disgusting
Ten pound or twenty pound note
Small Camelbak or viscous polymer back protector depending on what we are doing
Very small LED red rear light - important for low light forest in winter as well as benighted trips on road
From others’ posts - nitrile gloves - good call, will throw some in. Section of inner tube - nice.
Thinking about carrying Stans Darts, but my...are they expensive....