Manuals split into ammunition and Koo items
Arrows and bolts are still the manual set tied to the Manual Maniac achievement, but the written manual guides make two corrections to the old answer. First, the published arrow/bolt manual roster is ten special types — acid, explosive, fire, poison and lightning on both arrows and bolts — not the twelve ammunition records in this site’s weapon database, because plain Arrows and plain Bolts are not listed as manuals. Second, manuals are not only ammunition: IGN and Rock Paper Shotgun both describe Koo item manuals as a separate unlock family for tonics, censers, bottles, bombs and other support items. IGN places those under Koo’s Item Research at the Cleanse Walker. Nobody has published what any single craft costs in materials.
Where Koo item manuals fit
Koo item manuals answer a different confusion from the arrow-and-bolt achievement. They do not make a new sword, they do not teach a dish, and they are not counted by Valve’s “manuals for every arrow and bolt type” text. They expand what Koo can produce or carry for support — small and medium recovery tonics, censers and situational items are the examples named in the new lists — and IGN says the menu path is speaking with Koo inside the Cleanse Walker and choosing Item Research. Rock Paper Shotgun independently describes manuals that give Koo battle items, including an extra restorative alongside emergency medicine.
Cooking is a different menu with a different gate
Dishes are not crafted from the ammunition menu and are not unlocked by manuals. They come from cook books — 25 of them by two independent counts — and the last two are given at Kagura Rapport levels 8 and 10 rather than found. Fextralife publishes 25 dishes with their ingredients and named effects and no figures at all for any of them; the single exception anywhere is IGN’s Fried Egg at +5 HP and +1 Attack, which is the only published number for any dish in this game. If you are looking for what a dish actually does, that is the state of it.
Enhancing is the third menu, and it is three tracks
The campfire’s Enhance Equipment option is not crafting and does not consume ingredients — it spends Amber, and it splits into three separate lines: Sword Enhancement, Projectile Enhancement and Ranged Weapon Enhancement. The projectile line’s own help text is "Use Amber to enhance arrows and bolts", which means ammunition is both crafted and upgraded, through two different menus, gated on two different things. This site had that wrong until the menu was read off the client: it previously said swords had an enhancement track and ammunition had manuals instead. They have both.
Two things people search for that nobody has documented
Recorded as gaps rather than guessed at. Life Fruit: two independent walkthroughs agree that every Dragon Vein Shrine grants three of them, and forty shrines are enumerated with Stim thresholds at 1, 10, 20, 30 and 40 — so the acquisition is well corroborated and what a Life Fruit actually does is published by nobody. Grapple: Google suggests "how to grapple" for this game and there is no evidence in any source this site holds that a grapple exists at all — no creator demonstrates one, no wiki lists one, and no tooltip names one. That is not the same as saying there is none; it is saying that if a page tells you how to grapple, ask it where that came from.