Compress agent skills

agent-browser/references/eval.md

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+# JavaScript Evaluation
+
+Use `eval` to run JavaScript in the browser context.
+
+Simple expressions can use regular shell quoting:
+
+```bash
+agent-browser eval 'document.title'
+agent-browser eval 'document.querySelectorAll("img").length'
+```
+
+For complex JavaScript, use `--stdin` to avoid shell quoting corruption:
+
+```bash
+agent-browser eval --stdin <<'EVALEOF'
+JSON.stringify(
+  Array.from(document.querySelectorAll("img"))
+    .filter(i => !i.alt)
+    .map(i => ({ src: i.src.split("/").pop(), width: i.width }))
+)
+EVALEOF
+```
+
+Use base64 for generated scripts:
+
+```bash
+agent-browser eval -b "$(printf '%s' 'Array.from(document.querySelectorAll("a")).map(a => a.href)' | base64)"
+```
+
+Rules of thumb:
+
+- Single-line with no nested quotes: regular `eval 'expression'`.
+- Nested quotes, arrow functions, template literals, or multiline: `eval --stdin`.
+- Programmatic scripts: `eval -b`.