Phase 1-2 build: Steps 5-6, 8-13

Shoresh Engine (Haskell, Step 5)
- 12 modules: Types, Lexicon, Binyanim, Teamim, Gematria, Graph,
  KetivQere, Smikhut, Havdalah, Kriah, KiTov, Firmware
- 33 EUnit tests, 0 failures
- Firmware module verifies L1 SHA-256 hash at startup

Talmudic Engine (SWI-Prolog, Step 6)
- 15 modules: halt, reasoning, specification, interface
- 57 PlUnit tests, 0 failures
- Three cardinal halt conditions: avodah_zarah, shfichut_damim, gilui_arayot

Vav Pipeline (Elixir, Steps 8-11)
- 14 modules: BereishitCycle, Shema, Cloud, Manna, L1Reader,
  Specification, HaltConditions, ShabbatTimer, CycleLog, Chatzotzrot,
  ShoreshEngineClient, TalmudicEngineClient, Application
- 46 ExUnit tests, 0 failures
- Nishma-first architecture: hears before it speaks

Sanhedrin Framework (Erlang/OTP, Step 12)
- 8 modules: sanhedrin_app, sanhedrin_sup, escalation, panel_sup,
  panel, judge, clerk, halt_monitor
- 46 EUnit tests, 0 failures (includes fix: rejected outcome now reachable)
- Panel sizes: 1/3/23/71 — unanimous capital guilty → acquit (Sanhedrin 17a)
- Minority opinions append-only, never deleted

Korban Processor (Python, Step 13)
- 6 modules: korban, shechitah, semichah, zerikah, haktarah, router

Builder tooling: AGENTS.md, opencode.json, memory/, src/tools/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

talmudic_engine/src/reasoning/challenge.pl

@@ -0,0 +1,101 @@
+%% challenge.pl — Kushya generation.
+%%
+%% Architecture §3.4:
+%%   challenge(Interpretation, Challenge) :-
+%%       mitzvah(_, _, _, _) = Contradicting,
+%%       contradicts(Interpretation, Contradicting),
+%%       Challenge = kushya(Contradicting, Interpretation).
+%%
+%% A kushya is a challenge grounded in Torah text.
+%% It identifies a tension between the proposed interpretation
+%% and another part of the specification.
+%%
+%% The challenge is a question, not a refutation.
+%% It says: "But what about THIS verse/mitzvah?"
+
+:- module(challenge, [
+    challenge/2,
+    find_contradiction/3,
+    contradicts/2,
+    challenge_strength/2
+]).
+
+:- use_module('../specification/mitzvot').
+:- use_module('../specification/torah_text').
+:- use_module('../specification/relationships').
+:- use_module('../specification/root_meanings').
+
+%% ============================================================
+%% CHALLENGE GENERATION
+%% ============================================================
+
+%% Generate a challenge to an interpretation.
+%% A challenge consists of:
+%%   kushya(Contradicting, Interpretation, Strength)
+%%   - Contradicting: the mitzvah or verse that creates tension
+%%   - Interpretation: the interpretation being challenged
+%%   - Strength: strong | moderate | weak
+challenge(interpretation(CaseRef, Mitzvot, Verses, _Reading, _Confidence), Challenge) :-
+    find_contradiction(Mitzvot, Verses, Contradicting),
+    challenge_strength(Contradicting, Strength),
+    Challenge = kushya(Contradicting, CaseRef, Strength).
+
+%% ============================================================
+%% FIND CONTRADICTIONS
+%% ============================================================
+
+%% Strategy 1: Find a mitzvah that conflicts with one in the interpretation
+find_contradiction(Mitzvot, _Verses, contradiction(mitzvah_tension, ID1, ID2, Desc)) :-
+    member(mitzvah(ID1, _, _, _), Mitzvot),
+    mitzvah_conflicts_with(ID1, ID2, Desc).
+
+%% Strategy 2: Find a verse with a root in a conflicting domain
+find_contradiction(_Mitzvot, Verses, contradiction(domain_tension, Root, Domain1, Domain2)) :-
+    member(verse_ref(Book, Ch, Vs, _), Verses),
+    verse(Book, Ch, Vs, VerseRoots, _),
+    member(Root, VerseRoots),
+    root_domain(Root, Domain1),
+    root_domain(OtherRoot, Domain2),
+    Domain1 \= Domain2,
+    domains_in_tension(Domain1, Domain2),
+    member(OtherRoot, VerseRoots).
+
+%% Strategy 3: Find a mitzvah whose condition conflicts with the case context
+find_contradiction(Mitzvot, _Verses, contradiction(condition_tension, ID, Action, Cond)) :-
+    member(mitzvah(ID, _, Action, when(Cond)), Mitzvot),
+    condition_creates_tension(Cond).
+
+%% ============================================================
+%% TENSION DETECTION
+%% ============================================================
+
+%% contradicts/2 — does a source contradict an interpretation?
+%% This is the core logic: given an interpretation's grounding,
+%% does some other part of Torah create a tension?
+contradicts(interpretation(_, Mitzvot, _, _, _), Source) :-
+    find_contradiction(Mitzvot, [], Source).
+
+%% Domains that are inherently in tension
+domains_in_tension(judgment, mercy).
+domains_in_tension(mercy, judgment).
+domains_in_tension(holiness, transgression).
+domains_in_tension(transgression, holiness).
+domains_in_tension(death, life).
+domains_in_tension(life, death).
+domains_in_tension(authority, service).
+domains_in_tension(service, authority).
+
+%% Conditions that create tension (they limit universality)
+condition_creates_tension(seventh_day).        % Shabbat limits action
+condition_creates_tension(capital_case).        % Higher standard of evidence
+condition_creates_tension(pursuit_in_progress). % Time pressure
+condition_creates_tension(court_deliberation).  % Procedural constraints
+
+%% ============================================================
+%% CHALLENGE STRENGTH
+%% ============================================================
+
+%% Assess how strong a challenge is
+challenge_strength(contradiction(mitzvah_tension, _, _, _), strong).
+challenge_strength(contradiction(domain_tension, _, _, _), moderate).
+challenge_strength(contradiction(condition_tension, _, _, _), weak).