Overview

Planned library work on the existing public surface (gp, operators, records, strategies, algorithms). This is a backlog, not a schedule and not a promise of release dates.

The toolbox contract does not change. Evaluation, data loading, and any domain metric stay on the caller. New work is operators, primitive kits, archives, and evaluation plumbing — not a second genome family, not a new top-level package, and not an extra runtime dependency unless an item says otherwise.

Items are ordered by how much they help columnar and case-structured program search first, then multi-objective and continuous search, then housekeeping. Each item names the current gap and the intended surface.

#	Item	Surface	Status
1	Two-input causal windows	gp	shipped
2	Causal time-series unaries	gp	shipped
3	Incremental window kernels	gp (same API)	shipped
4	Batch tape evaluation	gp	shipped
5	Down-sampled and informed lexicase	operators	shipped
6	Case-structured evaluation helper	utilities + docs	shipped
7	Non-bloating semantic variation	gp	shipped
8	Quality-diversity archive	records	shipped
9	Compile and clone path	gp, tools	shipped
10	Vectorized lexicase and plexicase	operators	shipped
11	SMS-EMOA	operators	shipped
12	MOEA/D and AGE-MOEA-II	operators	shipped
13	IPOP / BIPOP CMA restarts	algorithms, strategies	shipped
14	Linear-time duplicate count	tools	shipped
15	Heterogeneous crossover	operators	shipped
16	Bounded Gaussian mutation	operators	shipped
17	Differential evolution operators	operators	shipped
18	Constraint-dominance selection	operators	shipped
19	Sep-CMA	strategies	shipped
20	CVT / unstructured MAP-Elites	records	shipped
21	Growing primitive language	gp	shipped
22	Semantic search space	gp, records	shipped
23	Co-evolving cases	operators, records	shipped
24	Memetic constants	gp, strategies	shipped
25	Streaming and island ecology	algorithms	shipped
26	Program teams	operators	shipped
27	Batch-epsilon-lexicase and down-sampled tournament	operators	shipped
28	Dynamic epsilon and downsample schedule	operators	shipped
29	Novelty selection and iso+line	operators, records	shipped
30	Causal lookback and suffix rescore	gp	shipped
31	Affine scaling and Lamarckian writeback	gp, utilities	shipped
32	Population tape CSE	gp	shipped
33	Evaluation budget and eval cache	algorithms, utilities	shipped
34	Parallel RNG streams	rng	shipped
35	Island topologies	operators	shipped
36	Persistent hall of fame	records	shipped
37	Interval analysis on tapes	gp	shipped
38	Structural meta-case regularization	operators, utilities	shipped
39	Homologous and semantic crossover	gp	shipped
40	Noisy fitness resample	utilities	shipped
41	Case-structured generalization path	utilities + docs	shipped
42	Memetic and affine leash	gp, utilities	shipped
43	Team and archive recipe	operators, records	shipped

Shipping an item updates the matching feature page and tutorial or reference stub. Items 15–20 are the toolbox-shaped holes after the first backlog; they are shipped. Items 21–26 compose pieces that already shipped (tapes, SlimGP, lexicase, archives, CMA) into a longer program-search loop, and they are shipped. Item 30 is the legal dirty-suffix path item 25 deferred. Item 31 (Keijzer affine scaling next to tune_ephemerals) is shipped. Items 27–40 are shipped. Further toolbox-shaped work stays Under consideration. Items 41–43 are the thin generalization, memetic-leash, and team-archive recipes that page left on the caller. Constraint-dominance on the remaining selectors, archive-improving CMA, RVEA / R-NSGA-II, and adaptive DE stay under consideration. Write-ups for the numbered items are on Features 1-10, Features 11-20, Features 21-30, Features 31-40, and Features 41-50. Feature pages are full decades even when the last decade is not full. Still not a second genome family. A separate Push GP page lists the planned policy track — observation schema through a private Push individual. That table is not part of items 1–43.

Note

deap-er stays a pure-Python package. Native work remains an optional extra (numba today) or an upstream wheel (moocore). An in-tree C, Cython, or Rust rewrite of operators, CMA, or selection is not on this list.