after moving all to cipher

worker-toolkit-stocks-in-the-future/scripts/codex_agent.py

@@ -27,6 +27,7 @@ import uuid
 from pathlib import Path
 
 import atif_session
+import browser_note
 
 from harbor.agents.installed.codex import Codex
 from harbor.models.trial.paths import EnvironmentPaths
@@ -77,8 +78,12 @@ _INSTALL_CMD = (
 
 
 class SystemNodeCodex(Codex):
+    # Set by install()'s probe, read by build_cli_flags(). Mirrors the claude adapter.
+    _has_browser = False
+
     async def install(self, environment) -> None:  # type: ignore[override]
         await self.exec_as_root(environment, command=_INSTALL_CMD)
+        self._has_browser = await browser_note.probe_browser(environment)
 
     def build_cli_flags(self) -> str:  # type: ignore[override]
         """Harbor's flags plus the registry's `agent_config`, so a trial's toolset
@@ -86,7 +91,24 @@ class SystemNodeCodex(Codex):
         $RACCOON_AGENT_FLAGS. Both run paths go through here."""
         flags = super().build_cli_flags()
         reductions = load_harness_registry().require("codex").agent_config_flags()
-        return f"{flags} {reductions}".strip() if reductions else flags
+        if reductions:
+            flags = f"{flags} {reductions}".strip()
+        return f"{flags} {self._browser_flag()}".strip() if self._browser_flag() else flags
+
+    def _browser_flag(self) -> str:
+        """Disclose the browser to codex the way codex takes extra instructions.
+
+        `developer_instructions` PREPENDS a developer message and leaves codex's own base
+        instructions in place — verified with `codex debug prompt-input`. That makes it the
+        equivalent of claude's --append-system-prompt. `model_instructions_file`, the other
+        instruction-shaped key, REPLACES the base instructions; do not use it here.
+        """
+        if not self._has_browser:
+            return ""
+        note = browser_note.browser_note()
+        if not note:
+            return ""
+        return f"-c developer_instructions={shlex.quote(note)}"
 
 
 # Where harbor's run-prep stages the prior Claude Code session for snapshot tasks