Compress agent skills

agent-browser/references/sessions-auth.md

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+# Sessions And Authentication
+
+## Named Sessions
+
+```bash
+agent-browser --session site1 open https://site-a.com
+agent-browser --session site2 open https://site-b.com
+agent-browser --session site1 snapshot -i
+agent-browser session list
+agent-browser --session site1 close
+```
+
+## Auth Vault
+
+Pipe passwords via stdin to avoid shell history exposure:
+
+```bash
+echo "pass" | agent-browser auth save github --url https://github.com/login --username user --password-stdin
+agent-browser auth login github
+agent-browser auth list
+agent-browser auth show github
+agent-browser auth delete github
+```
+
+## State Files
+
+```bash
+agent-browser open https://app.example.com/login
+agent-browser snapshot -i
+agent-browser fill @e1 "$USERNAME"
+agent-browser fill @e2 "$PASSWORD"
+agent-browser click @e3
+agent-browser wait --url "**/dashboard"
+agent-browser state save auth.json
+agent-browser state load auth.json
+```
+
+## Session Persistence
+
+```bash
+agent-browser --session-name myapp open https://app.example.com/login
+agent-browser close
+agent-browser --session-name myapp open https://app.example.com/dashboard
+agent-browser state list
+agent-browser state clear myapp
+agent-browser state clean --older-than 7
+```
+
+Set `AGENT_BROWSER_ENCRYPTION_KEY` to encrypt stored state at rest.