chore: auto-commit (95 archivos)

- cmd/fn/doctor.go
- cmd/fn/main.go
- cpp/apps/primitives_gallery/playground/tables/CMakeLists.txt
- cpp/apps/primitives_gallery/playground/tables/data_table.cpp
- cpp/apps/primitives_gallery/playground/tables/data_table_logic.cpp
- cpp/apps/primitives_gallery/playground/tables/data_table_logic.h
- cpp/apps/primitives_gallery/playground/tables/self_test.cpp
- cpp/apps/primitives_gallery/playground/tables/tql.cpp
- cpp/apps/primitives_gallery/playground/tables/viz.cpp
- cpp/apps/primitives_gallery/playground/tables/viz.h
- ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

functions/ml/genconfig_json_marshal.md

@@ -0,0 +1,84 @@
+---
+name: genconfig_json_marshal
+kind: function
+lang: go
+domain: ml
+version: "1.0.0"
+purity: impure
+signature: "func GenconfigMarshal(cfg GenerationConfig) ([]byte, error)\nfunc GenconfigUnmarshal(data []byte) (GenerationConfig, error)"
+description: "Wrappers json.Marshal/Unmarshal para GenerationConfig con formato canonico (MarshalIndent 2 espacios). Garantiza roundtrip identico al Python: json.dumps(indent=2, sort_keys=False). Campos JSON en snake_case."
+tags: [ml, json, marshal, unmarshal, serialization, generation, canonical]
+uses_functions: []
+uses_types: [generation_config_go_ml]
+returns: []
+returns_optional: false
+error_type: "error_go_core"
+imports: ["encoding/json"]
+params:
+  - name: cfg
+    desc: "GenerationConfig a serializar. Campos omitempty (negative_prompt, loras, clip_skip) se omiten si son zero/nil/empty."
+  - name: data
+    desc: "JSON bytes a deserializar. Acepta formato compacto o con indent. Keys deben ser snake_case (negative_prompt, cfg_scale, model_type, etc.)."
+output: "GenconfigMarshal: bytes JSON con indent 2 espacios, orden de campos segun declaracion del struct (prompt, negative_prompt, seed, steps, cfg_scale, sampler, width, height, model, loras, clip_skip). GenconfigUnmarshal: GenerationConfig poblado o error de parsing."
+tested: true
+tests:
+  - "roundtrip marshal unmarshal produce config igual"
+  - "json cross-language snake_case keys se deserializan correctamente"
+test_file_path: "functions/ml/genconfig_test.go"
+file_path: "functions/ml/genconfig_json_marshal.go"
+---
+
+## Ejemplo
+
+```go
+cfg := ml.GenerationConfig{
+    Prompt:   "a mountain at sunset",
+    Seed:     1234,
+    Steps:    30,
+    CfgScale: 7.0,
+    Sampler:  "euler",
+    Width:    768,
+    Height:   512,
+    Model:    ml.ModelRef{Name: "sdxl-base", ModelType: "sdxl", Quantization: "fp16"},
+}
+
+b, err := ml.GenconfigMarshal(cfg)
+// b == {
+//   "prompt": "a mountain at sunset",
+//   "seed": 1234,
+//   ...
+// }
+
+cfg2, err := ml.GenconfigUnmarshal(b)
+// cfg2 == cfg  (DeepEqual)
+```
+
+## Notas
+
+### Formato canonico y compatibilidad con Python
+
+`GenconfigMarshal` usa `json.MarshalIndent(cfg, "", "  ")`. El formato resultante es identico al que produce Python con `model.model_dump_json()` o `json.dumps(data, indent=2)` cuando `sort_keys=False`:
+
+- Keys en orden de declaracion del struct (no alfabetico).
+- Indent de 2 espacios, sin trailing whitespace.
+- Campos omitempty ausentes si zero: `negative_prompt` ausente si `""`, `loras` ausente si `[]`, `clip_skip` ausente si `nil`.
+
+### Keys JSON (snake_case obligatorio)
+
+| Campo Go | Key JSON |
+|---|---|
+| `Prompt` | `"prompt"` |
+| `NegativePrompt` | `"negative_prompt"` |
+| `Seed` | `"seed"` |
+| `Steps` | `"steps"` |
+| `CfgScale` | `"cfg_scale"` |
+| `Sampler` | `"sampler"` |
+| `Width` | `"width"` |
+| `Height` | `"height"` |
+| `Model.ModelType` | `"model_type"` |
+| `Model.Quantization` | `"quantization"` |
+| `ClipSkip` | `"clip_skip"` |
+
+### Por que impure
+
+Los errores de `json.Unmarshal` son errores de parsing del input externo, no de I/O, pero se modelan como `(T, error)` para forzar manejo explicito en el caller. Marcado `impure` con `error_type: error_go_core` por convencion del registry.