diff --git a/src/context_system/prompt_assembly.py b/src/context_system/prompt_assembly.py
index 295807b9..8d37874d 100644
--- a/src/context_system/prompt_assembly.py
+++ b/src/context_system/prompt_assembly.py
@@ -904,32 +904,6 @@ def _emit_group(
     "after a single failure either. Escalate to the user only when you're "
     "genuinely stuck after investigation, not as a first response to "
     "friction.\n"
-    # Measured on seven shared terminal-bench 2.1 tasks, same model and
-    # effort, classifying every step by purpose (2026-07-26, two clawcodex
-    # runs vs the latest Claude Code, per trial):
-    #
-    #                    clawcodex        Claude Code
-    #   explore:inspect  1.71 / 1.57      2.43   <- CC inspects MORE
-    #   author:inline    2.71 / 2.29      1.14
-    #   run:exec         2.29 / 3.57      1.14   <- biggest gap
-    #
-    # Claude Code buys ~0.7 extra inspection steps and saves 1.2-2.4
-    # execution steps: it looks at the data, then writes something that works.
-    # clawcodex writes from assumptions, runs, and pays for it in fix cycles.
-    # This is also why the reverse guidance failed: a bullet telling the model
-    # to act as soon as it had enough information (withdrawn 2026-07-26) made
-    # both step count and reward worse, because under-inspection was the
-    # deficit, not over-deliberation.
-    #
-    # Deliberately narrow: the assumptions the NEXT action depends on, not a
-    # survey of the environment. The exhaustive-audit machinery removed in
-    # #749 is what over-broad exploration guidance costs.
-    "- Before running something you just wrote, confirm the specific "
-    "assumptions it depends on — the shape of the input, which tools "
-    "actually exist, the exact output expected. One cheap check on the real "
-    "data usually costs less than a failed run plus the fix cycle that "
-    "follows it. This is about the assumptions your next action rests on, "
-    "not a survey of the environment.\n"
     "- For ambiguous bugs, failures, or unfamiliar data, form a small set "
     "of plausible hypotheses from the available evidence and rank them by "
     "likelihood and the cost of checking them. Start with the cheapest "
diff --git a/tests/test_system_prompt_full.py b/tests/test_system_prompt_full.py
index 0cebf308..2d52c63e 100644
--- a/tests/test_system_prompt_full.py
+++ b/tests/test_system_prompt_full.py
@@ -79,33 +79,6 @@ def test_task_prompt_audits_requirements_without_a_quantifier_trigger(self):
         assert "all, every, multiple, or an exhaustive set" not in prompt
         assert "stopping after the first one" not in prompt
 
-    def test_task_prompt_checks_assumptions_before_executing(self):
-        """Under-inspection, not over-deliberation, is the measured deficit.
-
-        Classifying every trajectory step by purpose on seven shared
-        terminal-bench 2.1 tasks at the same model and effort (2026-07-26,
-        two clawcodex runs vs the latest Claude Code, per trial):
-
-            explore:inspect   1.71 / 1.57   vs   2.43   <- CC inspects MORE
-            author:inline     2.71 / 2.29   vs   1.14
-            run:exec          2.29 / 3.57   vs   1.14   <- biggest gap
-
-        Claude Code spends ~0.7 more steps looking and 1.2-2.4 fewer steps
-        executing. The opposite bullet — act as soon as you have enough
-        information — was tried and withdrawn the same day for making both
-        step count and reward worse.
-
-        The wording must stay scoped to the next action's assumptions; broad
-        exploration guidance is what #749 had to remove.
-        """
-        prompt = build_full_system_prompt(use_cache=False)
-        assert "Before running something you just wrote" in prompt
-        assert "cheap check on the real data" in prompt
-        assert "not a survey of the environment" in prompt, (
-            "the scope limiter is load-bearing — without it this becomes the "
-            "exhaustive-exploration guidance removed in #749"
-        )
-
     def test_task_prompt_prioritizes_evidence_and_cheap_discriminating_checks(self):
         prompt = build_full_system_prompt(use_cache=False)
         assert "small set of plausible hypotheses" in prompt