Add naming standard (format vs profile)

NAMING.md

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+# Sealed naming standard — coherent AMD family
+
+## Hard constraint from ROCmFPX types
+
+| Wanted name | Exists? | Notes |
+|-------------|---------|-------|
+| `Q4_0_ROCMFP4_COHERENT` + imatrix | **YES** | Preferred farm default |
+| `Q5_*_ROCMFP4_COHERENT` | **NO** | No ROCmFP4 Q5 type in this fork |
+| `Q6_0_ROCMFP4_COHERENT` | **NO** | Q6 is **ROCmFPX**, not ROCmFP4 |
+| `Q6_0_ROCMFPX_AGENT` + imatrix | **YES** | Q6 “coherent / agent” profile |
+
+**ROCMFP4_COHERENT is a Q4-only quant type.**  
+Higher bit “coherent” uses **ROCMFPX_AGENT**, not the string `ROCMFP4_COHERENT`.
+
+## Shipped set (this dir)
+
+| File | Role |
+|------|------|
+| `Qwen3.6-35B-A3B-Q4_0_ROCMFP4_COHERENT-imatrix.gguf` | Default — format ROCmFP4 + profile COHERENT + imatrix (~19G) |
+| `Qwen3.6-35B-A3B-Q6_0_ROCMFPX_AGENT-imatrix.gguf` | High quality AMD coherent Q6 (~31G, tight on 32GB) |
+| `Qwen3.6-35B-A3B-imatrix.gguf` | Shared imatrix |
+
+**Removed (not coherent AMD):**
+- `Q5_K_M-imatrix` (stock Q5, not ROCmFP4/ROCmFPX coherent)
+- `Q6_0_ROCMFPX-imatrix` (base Q6, not AGENT)
+
+## Filename pattern (locked)
+
+```text
+Qwen3.6-35B-A3B-{TYPE}-imatrix.gguf
+```
+
+Where `{TYPE}` is the **exact llama-quantize ftype string**:
+- `Q4_0_ROCMFP4_COHERENT`
+- `Q6_0_ROCMFPX_AGENT`
+- (future) `Q8_0_ROCMFPX_AGENT`, `Q3_0_ROCMFPX_AGENT`, etc.
+
+Do **not** invent `Q5_0_ROCMFP4_COHERENT` or rename stock quants to look like ROCmFP4.
+
+## Optional future
+
+| Type | Size (est.) | When |
+|------|-------------|------|
+| `Q6_0_ROCMFPX_AGENT_LEAN` | ~27G | If full AGENT is too tight on 32GB |
+| `Q8_0_ROCMFPX_AGENT` | ~34G | Dual-GPU / short ctx only |