feat(speculation): add enumerator and selector extensions#232
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This was referenced Jun 9, 2026
Add the two pluggable seams from the speculation RFC, as vendor-agnostic extension interfaces under submitqueue/extension/speculation/. enumerator: given a batch and its dependency batches (carrying per-batch Score), mechanically lists the candidate Base/Head paths and scores each — pure, deterministic, status-free. selector: given a speculation tree with controller-stamped status, returns a per-path action (Build/Cancel) — the policy seam; reads status, emits actions, never writes status. Each follows the repo extension contract (conflict.Analyzer reference shape): Factory.For(Config) (T, error) with Config carrying only QueueName; behavioral knobs are integrator-injected at construction. Includes READMEs, gomock packages, and Makefile mock-gen wiring. Interfaces only; concrete impls and controller wiring are deferred.
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Summary
Add the two pluggable seams from the speculation RFC, as vendor-agnostic extension interfaces under submitqueue/extension/speculation/.
enumerator: given a batch and its dependency batches (carrying per-batch Score), mechanically lists the candidate Base/Head paths and scores each — pure, deterministic, status-free.
selector: given a speculation tree with controller-stamped status, returns a per-path action (Build/Cancel) — the policy seam; reads status, emits actions, never writes status.
Each follows the repo extension contract (conflict.Analyzer reference shape): Factory.For(Config) (T, error) with Config carrying only QueueName; behavioral knobs are integrator-injected at construction. Includes READMEs, gomock packages, and Makefile mock-gen wiring. Interfaces only; concrete impls and controller wiring are deferred.
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