card: frontier credibility (datasets/Usage/Limitations) metadata-only 20261104T153547Z

Outside Dev G — no weight changes; honest datasets YAML or undeclared note; short Usage/Limitations where audit MISSING.

README.md

@@ -49,6 +49,26 @@ szl:
 
 # KHIPU-R2
 
+<!-- SZL-FRONTIER-CRED-20261104 -->
+## Usage
+
+PEFT/LoRA adapter — attach to the declared `base_model` at a pinned revision. Research-only unless a separate eval+serve gate says otherwise.
+
+```python
+from peft import PeftModel
+from transformers import AutoModelForCausalLM, AutoTokenizer
+base_id = "<BASE_FROM_CARD>"
+base_rev = "<BASE_PIN>"
+adapter = "SZLHOLDINGS/KHIPU-R2"
+adapter_rev = "<PINNED_SHA>"
+tok = AutoTokenizer.from_pretrained(base_id, revision=base_rev)
+base = AutoModelForCausalLM.from_pretrained(base_id, revision=base_rev, device_map="auto")
+model = PeftModel.from_pretrained(base, adapter, revision=adapter_rev)
+```
+
+Do not overwrite canonical serve tags (`chaski`, `SZL-Khipu-1.5B`, `szl1`).
+
+
 A separate abstention-retraining experiment with adapter-scoped historical evaluation records.
 
 **Artifact:** QLoRA adapter; separate merged checkpoint · **Stage:** Research · release blocked
@@ -173,6 +193,15 @@ verified. A license addition requires source-owner review of that coverage.
 Canonical card authoring source: [khipu-r2/card/README.md](https://github.com/szl-holdings/szl-forge/blob/6f4ac90ff503265cec9c0436587f086e52d6124e/khipu-r2/card/README.md).
 Doctrine v11 LOCKED 749/14/163. Λ = Conjecture 1, advisory, never a theorem.
 
+<!-- SZL-FRONTIER-CRED-20261104 -->
+## Limitations
+
+- Proposal / research artifact unless a separate signed eval+serve gate exists.
+- Train loss ≠ evaluation; named-N gates may fail or be historical-only.
+- Not authorized for autonomous execution or high-stakes deployment by this card alone.
+- Pin revisions; floating `main` is not a serve contract.
+- **datasets YAML undeclared:** no Hub `datasets:` id is asserted on this card. Local/receipt digests (jsonl SHA) are not Hub dataset ids; this wave does not invent them.
+
 <!-- SZL-CARD-TECHNICAL:v1:END -->
 </details>