fix(copilot): address round-6 review nits

- Remove redundant inner `ChatConfig` import in `_prewarm_cli` — it was
  already imported at module scope on line 16 (style guide: inner imports
  only for heavy optional deps)
- Correct stale comment in `sdk_compat_test.py`: 2.1.63/2.1.70 pre-date
  the context-management regression and are OpenRouter-safe without any
  env var; only 2.1.97+ requires CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1
- Update `_assert_no_forbidden_patterns` error message in
  `cli_openrouter_compat_test.py`: remove the stale "above 0.1.45" ceiling
  (we've already upgraded to 0.1.58) and point at the correct remediation
  steps (add to _KNOWN_GOOD_BUNDLED_CLI_VERSIONS after bisect verification)
- Plug test coverage gap in `env_test.py`: add
  `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS == "1"` assertions to three
  OpenRouter test methods that were missing it
  (test_strips_trailing_v1, test_strips_trailing_v1_and_slash,
  test_no_v1_suffix_left_alone) — guards against the env var being
  accidentally dropped from a code path that the main test didn't exercise

autogpt_platform/backend/backend/copilot/executor/processor.py

@@ -183,8 +183,6 @@ class CoPilotProcessor:
         back to the bundled binary when no override is set.
         """
         try:
-            from backend.copilot.config import ChatConfig
-
             cfg = ChatConfig()
             cli_path: str | None = cfg.claude_agent_cli_path
             if not cli_path:

autogpt_platform/backend/backend/copilot/sdk/cli_openrouter_compat_test.py

@@ -443,14 +443,15 @@ def _assert_no_forbidden_patterns(
         f"Bundled Claude Code CLI sent OpenRouter-incompatible features in "
         f"{len(all_findings)} request(s):\n  - "
         + "\n  - ".join(all_findings)
-        + "\n\nThis is the regression that prevents us from upgrading "
-        "`claude-agent-sdk` above 0.1.45. See "
-        "https://github.com/Significant-Gravitas/AutoGPT/pull/12294 and "
+        + "\n\nThe bundled CLI is sending OpenRouter-incompatible features. "
+        "See https://github.com/Significant-Gravitas/AutoGPT/pull/12294 and "
         "https://github.com/anthropics/claude-agent-sdk-python/issues/789. "
-        "If you intended to upgrade, ensure "
-        "`CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1` is set in the SDK env "
-        "or use a known-good CLI binary via `claude_agent_cli_path` (env: "
-        "`CLAUDE_AGENT_CLI_PATH` or `CHAT_CLAUDE_AGENT_CLI_PATH`)."
+        "If you bumped `claude-agent-sdk`, verify the new bundled CLI works "
+        "with `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1` set (injected by "
+        "``build_sdk_env()`` in ``env.py``), then add the CLI version to "
+        "`_KNOWN_GOOD_BUNDLED_CLI_VERSIONS` in `sdk_compat_test.py`. "
+        "Alternatively, pin a known-good binary via `claude_agent_cli_path` "
+        "(env: `CLAUDE_AGENT_CLI_PATH` or `CHAT_CLAUDE_AGENT_CLI_PATH`)."
     )
 
 

autogpt_platform/backend/backend/copilot/sdk/env_test.py

@@ -138,6 +138,7 @@ class TestBuildSdkEnvOpenRouter:
             result = build_sdk_env()
 
         assert result["ANTHROPIC_BASE_URL"] == "https://openrouter.ai/api"
+        assert result.get("CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS") == "1"
 
     def test_strips_trailing_v1_and_slash(self):
         """Trailing slash before /v1 strip is handled."""
@@ -149,6 +150,7 @@ class TestBuildSdkEnvOpenRouter:
 
         # rstrip("/") first, then remove /v1
         assert result["ANTHROPIC_BASE_URL"] == "https://openrouter.ai/api"
+        assert result.get("CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS") == "1"
 
     def test_no_v1_suffix_left_alone(self):
         """A base URL without /v1 is used as-is."""
@@ -159,6 +161,7 @@ class TestBuildSdkEnvOpenRouter:
             result = build_sdk_env()
 
         assert result["ANTHROPIC_BASE_URL"] == "https://custom-proxy.example.com"
+        assert result.get("CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS") == "1"
 
     def test_session_id_header(self):
         cfg = self._openrouter_config()

autogpt_platform/backend/backend/copilot/sdk/sdk_compat_test.py

@@ -215,17 +215,19 @@ def test_sdk_exports_hook_event_type(hook_event: str):
 # message that points the next person at the OpenRouter compat issue
 # instead of letting them silently re-break production.
 
-# CLI versions verified to work against OpenRouter when the
-# ``CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1`` env var is set --
-# bisected via the reproduction test in ``cli_openrouter_compat_test.py``.
+# CLI versions bisect-verified as OpenRouter-safe.  2.1.63 and 2.1.70 pre-date
+# the context-management beta regression and work without any env var.  2.1.97+
+# requires ``CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1`` (injected by
+# ``build_sdk_env()`` in ``env.py``) to strip the beta header.
 _KNOWN_GOOD_BUNDLED_CLI_VERSIONS: frozenset[str] = frozenset(
     {
         "2.1.63",  # claude-agent-sdk 0.1.45 -- original pin from PR #12294.
         "2.1.70",  # claude-agent-sdk 0.1.47 -- first version with the
         #          tool_reference proxy detection fix; bisect-verified
         #          OpenRouter-safe in #12742.
-        "2.1.97",  # claude-agent-sdk 0.1.58 -- works with the
-        #          CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 env var.
+        "2.1.97",  # claude-agent-sdk 0.1.58 -- OpenRouter-safe only with
+        #          CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 (injected by
+        #          build_sdk_env() in env.py).
     }
 )