Add critic technical report (arxiv) link to SDK and CLI docs

openhands/usage/cli/critic.mdx

@@ -16,7 +16,11 @@ For detailed information about the critic feature, including programmatic access
 
 ## What is the Critic?
 
-The critic is an LLM-based evaluator that analyzes agent actions and conversation history to predict the quality or success probability of agent decisions. It provides:
+The critic is an LLM-based evaluator that analyzes agent actions and conversation history to predict the quality or success probability of agent decisions (see our technical report: [A Rubric-Supervised Critic from Sparse Real-World Outcomes](https://arxiv.org/abs/2603.03800) for detailed methodology).
+
+It provides:
+
+It provides:
 
 - **Quality scores**: Probability scores between 0.0 and 1.0 indicating predicted success
 - **Real-time feedback**: Scores computed during agent execution, not just at completion

sdk/guides/critic.mdx

@@ -21,7 +21,7 @@
 You can use critic scores to build automated workflows, such as triggering the agent to reflect on and fix its previous solution when the critic indicates poor task performance.
 
 <Note>
-This critic is a more advanced extension of the approach described in our blog post [SOTA on SWE-Bench Verified with Inference-Time Scaling and Critic Model](https://openhands.dev/blog/sota-on-swe-bench-verified-with-inference-time-scaling-and-critic-model). A technical report with detailed evaluation metrics is forthcoming.
+This critic is a more advanced extension of the approach described in our blog post [SOTA on SWE-Bench Verified with Inference-Time Scaling and Critic Model](https://openhands.dev/blog/sota-on-swe-bench-verified-with-inference-time-scaling-and-critic-model). For detailed evaluation metrics and methodology, see our technical report: [A Rubric-Supervised Critic from Sparse Real-World Outcomes](https://arxiv.org/abs/2603.03800).
 </Note>
 
 ## Quick Start
@@ -97,7 +97,7 @@
 
 ### Custom Follow-up Prompts
 
 By default, the critic generates a generic follow-up prompt. You can customize this by subclassing `CriticBase` and overriding `get_followup_prompt()`:
 
 ```python icon="python" focus={4-12}
 from openhands.sdk.critic.base import CriticBase, CriticResult