Colorizer round6: checkpoint 2500

.gitattributes

@@ -123,3 +123,7 @@ experiments/final-20260928/realism_high_v2/review_2500_2.jpg filter=lfs diff=lfs
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+experiments/final-20260928/realism_low_v2/probes_2500.jpg filter=lfs diff=lfs merge=lfs -text
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experiments/final-20260928/realism_low_v2/SHA256SUMS.json

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experiments/final-20260928/realism_low_v2/history.json

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experiments/final-20260928/realism_low_v2/review_2500_key.json

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experiments/final-20260928/realism_low_v2/status.json

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 {
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experiments/final-20260928/realism_low_v2/step_02500/README.md

@@ -0,0 +1,5 @@
+# Experimental semantic colorizer
+
+Head: palette. Parameters: 3994676.
+
+Not approved for production. Requires semantic_model.py; incompatible with the old U-Net loader. Input is Lab lightness normalized to [-1,1]; output is Lab ab. See the run protocol, provenance, selection and visual comparisons. Predictions are plausible colors, not recovered historical truth.

experiments/final-20260928/realism_low_v2/step_02500/config.json

@@ -0,0 +1,7 @@
+{
+  "architecture": "SemanticColorizer",
+  "head": "palette",
+  "width": 128,
+  "queries": 16,
+  "format_version": 1
+}

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