Perks

One point per level (P). Each tier needs 3 points spent in that branch first. Ranked perks stack.

Made from the game's data on every update, so it matches the live game.

Engineering

Tier	Perk	Ranks	Does
1	Heat Pipes	3	+0.4 cooling/s per rank.
1	Tight Loops	3	+0.3 lines/s per rank.
2	Expanded Memory	3	+1 code line per rank.
2	Subroutines	1	run_script("name") runs one of your saved scripts from inside a program. Its lines don't count against the motherboard limit.
3	Thermal Mass	3	+10 max heat per rank.
4	Overclock	2	x1.1 lines/s per rank.
5	Pipelining	1	Loop checks cost no CPU.

Horticulture

Tier	Perk	Ranks	Does
1	Green Thumb	3	+6% crop growth per rank.
1	Haggler	3	5% off at the shop per rank.
1	Soil Science	1	Poncho can take_sample() and the shed's Soil Lab tests them (exact pH, N, P, K). get_lab(), the soil map (M), and Lime and Sulfur in the shop.
2	Deep Pockets	2	+2 bag slots per rank.
2	Nutrient Balancing	1	Phosphate and Potash in the shop, to fix P and K on their own.
3	Field Probe	1	probe(): a live pH, N, P, K reading of the tile under Poncho. No lab, no wait.
3	Plenty	3	+5% double-harvest chance per rank.
4	Precision Spreading	2	Compost and amendments work 25% better per rank.
4	Quick Study	2	+8% experience per rank.
5	Sprinkler	1	water() also waters the 4 tilled tiles around Poncho.

Scavenging

Tier	Perk	Ranks	Does
1	Brave Little Bot	3	+10% fear resist per rank.
1	Scrap Plating	3	8% less heat from hits per rank.
2	Lucky Find	3	+6% loot find per rank.
3	Long Range	1	+1 sensor range.
4	Zapper	2	+0.5 power per rank (attack damage).
5	Scavenger	1	Crates and glitch scrap roll one extra loot drop.