[REPPL]

This lands the first part of the decision adapter intent.

A small model can now answer one of abcd's closed-option judgements beside the host, or in its place, with a value and a probability.

What a person sees

• One interface for typed judgements. Each judgement type in the registry (twelve) is a question with closed options: choose, score, or yes/no. The host or a decision adapter answers it with a value and a probability. Embark's lesson ranking is among the registered types.

• A route per type, in three modes. A type's route is set under oracle.judgements.<type>:

  • host is the default.
  • shadow:<provider>/<model> keeps the host's answer and records the adapter's answer beside it.
  • The bare <provider>/<model> hands the decision to the adapter.

  A repository's .abcd/config.json may keep a type on the host or put it in shadow. Only the person's own ~/.abcd.noindex/config.json turns a type on, and a repository's turned-on route is skipped with a diagnostic. Every route, shadow included, passes the provider's model list and the denylist before any call.

• The drain's eligibility judgement goes through it.

  • On the host, the drain behaves as before.
  • In shadow, the host's answer stands, and the pair (both answers, the probability and a state hash) is appended to pairs.jsonl in the newest lab home. Nothing is written in the repository.
  • A state larger than the model's window is recorded as a skipped pair.
  • Turned on, the adapter's answer goes through the same checks as the host's answer, and the drain's record names the route. An adapter that cannot answer leaves the host's request standing, and a fallback receipt is kept. The adapter is asked at most once per request.

• abcd lab harvest reports agreement per type. It gives pairs, compared, agreed and skipped counts, a rate, and four probability bands, plus the line a research note carries to turn a type on. It reads the pairs a line at a time, so a large file does not stop the harvest.

• abcd ahoy connect for a keyless provider offers a judgement type the shadow: spelling in either file, and says the bare spelling turns a type on only from the person's own machine file. ahoy --providers spells a shadow route with its prefix.

Not in this change

• Embark's lesson ranking is registered but not yet routed through the adapter. It stays in scope as a real judgement and is the intent's next step. So the spec stays open, the intent stays planned, and this change carries no Delivers:.
• The other judgement types are made in host command pages that hand nothing back to the binary. They stay on the host whatever their route says until their steps call the router. The pages say so.

Checks

• Each mode is driven through a real drain move with a fake adapter, and each new test was watched fail first.
• The harvest reads a pairs file past the 4 MiB document bound.
• make preflight passed on the head, 6d1e887.
• The build loop's review rounds passed: in the last round every reviewer said ship, and the audit judged no criterion not met.

Resolves: iss-2610262037348735
Refs: itd-2609221009495079
Refs: iss-2610262033055327

Assisted-by: Claude:claude-opus-5-5