feat(config): add RSAConfig + named profiles (default-16gb, paper-16k, paper-headline-40k)

tests/test_config.py

@@ -0,0 +1,60 @@
+import pytest
+from markovian_rsa_mlx.config import RSAConfig
+
+
+def test_default_config_values():
+    cfg = RSAConfig()
+    assert cfg.rounds == 2
+    assert cfg.parallel == 4
+    assert cfg.aggregation_subsample == 4
+    assert cfg.chunk_tokens == 16384
+    assert cfg.tail_tokens == 4096
+    assert cfg.final_tokens is None
+    assert cfg.temperature == 1.0
+    assert cfg.top_p == 0.95
+    assert cfg.top_k == -1
+    assert cfg.seed is None
+    assert cfg.serial is False
+    assert cfg.auto_serial is True
+    assert cfg.memory_fraction == 0.80
+    assert cfg.max_context_tokens is None
+    assert cfg.aggregation_template == "zaya_v1"
+    assert cfg.answer_selection == "first_final_candidate"
+
+
+def test_validation_rejects_negative_tokens():
+    with pytest.raises(ValueError, match="chunk_tokens must be positive"):
+        RSAConfig(chunk_tokens=0)
+
+
+def test_validation_rejects_K_greater_than_N():
+    with pytest.raises(ValueError, match="aggregation_subsample.*<= parallel"):
+        RSAConfig(parallel=2, aggregation_subsample=4)
+
+
+def test_default_16gb_profile():
+    cfg = RSAConfig.default_16gb()
+    assert cfg.parallel == 2
+    assert cfg.chunk_tokens == 16384
+
+
+def test_paper_16k_profile():
+    cfg = RSAConfig.paper_16k()
+    assert cfg.parallel == 4
+    assert cfg.chunk_tokens == 16384
+    assert cfg.top_p == 1.0
+
+
+def test_paper_headline_40k_profile():
+    cfg = RSAConfig.paper_headline_40k()
+    assert cfg.parallel == 16
+    assert cfg.chunk_tokens == 40960
+    assert cfg.final_tokens == 40960
+    assert cfg.top_p == 1.0
+
+
+def test_effective_final_tokens_falls_back_to_chunk():
+    cfg = RSAConfig(chunk_tokens=8192, final_tokens=None)
+    assert cfg.effective_final_tokens() == 8192
+    cfg2 = RSAConfig(chunk_tokens=8192, final_tokens=20000)
+    assert cfg2.effective_final_tokens() == 20000