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The following security-relevant defaults are intentional. Each item names the code path that carries the constraint and the compensating controls that make the trade-off acceptable.

• Location: agents/langchain-deepagents-code/start.sh (prepare_runtime_env)
• Constraint: /tmp/nemoclaw-proxy-env.sh is sandbox-user-owned convenience state, not an integrity boundary. It is created with mode 0444 so independent login and exec shells can source the same credential-free settings. The Deep Agents Code runtime deliberately runs as the non-root sandbox user, unlike the root-supervised OpenClaw and Hermes startup paths.
• Compensating controls:
  1. The file is credential-free by construction. prepare_runtime_env writes normalized proxy config and inherited trust-store paths. It does not persist LangSmith tracing, project, or API key variables.
  2. A regression test in test/langchain-deepagents-code-image.test.ts injects token-shaped values through LangSmith tracing and both project variables, scans the emitted env file against canonical token shapes, and fails CI if any secret-shaped value is present.
  3. The root-owned, image-baked proxy host/port files and direct dcode-launcher.sh boundary remain the routing source of truth. Focused and live login-shell checks compare the sourced convenience values with that root-owned source; file metadata checks detect accidental drift but do not claim sandbox-owner tamper resistance.
• When to revisit: If a future change adds credential-shaped values to the env-file writer, or if the Deep Agents Code runtime moves back to the root-supervised startup model, revisit the mode and the compensating controls together.