Add system resource detection, Docker execution skill, and environment-aware recommendations

- TUI header now shows CPU cores, RAM, GPU, and Docker availability
- System prompt uses resource info to recommend execution environments
- Docker skill for running experiment code in isolated containers
- Renamed docker-sandbox skill to docker (Feynman stays on host, code runs in containers)
- Updated README and website to cite Docker alongside Agent Computer

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/src/content/docs/workflows/replication.md

@@ -19,6 +19,7 @@ Before running code, Feynman asks you to choose an execution environment:
 
 - **Local** — run in the current working directory
 - **Virtual environment** — create an isolated venv/conda env first
+- **Docker** — run experiment code inside an isolated Docker container
 - **Cloud** — delegate to a remote Agent Computer machine
 - **Plan only** — produce the replication plan without executing
 

website/src/pages/index.astro

@@ -116,9 +116,13 @@ import Base from '../layouts/Base.astro';
           <div class="font-semibold mb-1"><a href="https://www.alphaxiv.org/" class="text-accent hover:underline">AlphaXiv</a></div>
           <p class="text-sm text-text-muted">Paper search, Q&A, code reading, persistent annotations</p>
         </div>
+        <div class="bg-surface rounded-xl p-5">
+          <div class="font-semibold mb-1"><a href="https://www.docker.com/" class="text-accent hover:underline">Docker</a></div>
+          <p class="text-sm text-text-muted">Isolated container execution for safe local experiments</p>
+        </div>
         <div class="bg-surface rounded-xl p-5">
           <div class="font-semibold mb-1"><a href="https://agentcomputer.ai" class="text-accent hover:underline">Agent Computer</a></div>
-          <p class="text-sm text-text-muted">Secure cloud execution for experiments and replications</p>
+          <p class="text-sm text-text-muted">Secure cloud execution for GPU workloads and long-running research</p>
         </div>
         <div class="bg-surface rounded-xl p-5">
           <div class="font-semibold mb-1">Web search</div>