A keeper is made over a decade. The engine sees who made him.
A goalkeeper is a different position with a different craft, and it runs through a dedicated specialist, so crediting a keeper's development to the manager is simply wrong. The engine isolates the goalkeeping-development residual across the three goalkeeping clusters, pulls it out of the manager's fingerprint, and reads it the way it reads any coach. And because goalkeepers have the longest careers and gentlest decline in the whole model, this fingerprint accrues slowly, over many seasons of a single keeper. It is the most patient read on the staff, and it never touches a rating.
Outfield players do not have these clusters. The manager does not develop them.
The goalkeeper sits inside the same engine and the same rating scale as everyone else, but he is scored on three clusters no outfield player has, and developing them is a specialist craft. So the goalkeeping-development residual is pulled entirely out of the manager and given to the named goalkeeping coach who actually does the work.
Everyone else in the market rates the club's goalkeeping setup or hands the credit vaguely to the manager. But a keeper's shot-stopping, his command of the box, and his footwork are developed by one person doing a distinct job, and the engine attributes them there. The manager keeps a bounded share for hiring a strong goalkeeping coach; the coach keeps the development he produced. A goalkeeper is its own position, so his development has its own author.
Illustrative engine read on the real goalkeeping structure (the keeper scored on the three goalkeeping clusters inside the same machinery, the goalkeeping-development residual pulled from the manager to the named coach). Composite reads, demonstration figures.
Shot-stopping, commanding the box, playing out. A coach can build one and not the others.
A modern goalkeeper is not one skill. He stops shots, he dominates his area, and he plays out from the back, and these are genuinely different crafts. So the coach's residual is read on all three clusters separately, because a coach who builds a shot-stopper who cannot pass and one who builds a ball-playing sweeper who flaps at crosses are different coaches, and one number would hide it.
This composite coach reliably builds shot-stoppers who can play out from the back, the two modern-defining goalkeeping crafts, but adds almost nothing to a keeper's command of his box. That is a precise, useful read: a young keeper who needs to grow into crosses should go elsewhere for that, and a club chasing a sweeper-keeper has found exactly the right developer. A single goalkeeping-coach number would call all three the same. The keeper's three jobs are read as three, because a coach is rarely equally good at all of them.
Illustrative engine read on the real goalkeeping-development residual (scoped to the three goalkeeping clusters Shot-Stopping, Command & Aerial Control, and Sweeping & Distribution, read separately). Composite coach, demonstration figures.
Keepers age the slowest, so their coaches show up the slowest too.
Goalkeepers are the lowest-physical-dependence, longest-career profile in the whole engine: they peak late and decline gently, and a good one plays into his late thirties. That changes how the coach's fingerprint is read. Where a set-piece coach's signal is noisy and needs many clubs to confirm, a goalkeeping coach's signal is slow and deep, accruing over many seasons of a single keeper.
The long career is a gift to the read: a goalkeeping coach who takes a raw teenager and is still adding to him a decade later leaves a deep, unmistakable fingerprint, and the engine is patient enough to let it accrue rather than judging him on one season. Like every portable actor, it must reproduce at another club to be his. The most patient craft on the pitch gets the most patient read, and its author gets the credit.
Illustrative engine read on the real goalkeeping confidence shape (the longest-career, lowest-physical-dependence profile, a fingerprint accruing over many seasons), portability validation, the manager credit-split, and the no-KR rule. Composite reads, demonstration figures.
The goalkeeper is a different position with a different craft, scored on three clusters no outfield player has, so his development belongs to the specialist who does the work and is pulled out of the manager entirely. The engine reads the three goalkeeping jobs apart, because a coach who builds a shot-stopper who can play out is not the same as one who builds a keeper who commands his box, and one number would hide it. And because a goalkeeper has the longest career and gentlest decline in the whole model, his coach's fingerprint accrues slowly, over many seasons of one keeper, so the engine reads it patiently rather than on a single year, validates it across clubs like any actor, and never lets it touch the keeper's rating. Some work shows up fast and loud. Goalkeeping shows up over a career, and the engine is built to wait for it.
Give the keeper his own coach. And the credit its own author.
The Goalkeeping Coach read isolates the three goalkeeping clusters, reads the modern keeper's three jobs apart, and lets a long-career fingerprint accrue patiently, never touching a rating.