diff --git a/promptpilot/pipeline_insights.py b/promptpilot/pipeline_insights.py
index 58043c0..d422dda 100644
--- a/promptpilot/pipeline_insights.py
+++ b/promptpilot/pipeline_insights.py
@@ -415,6 +415,21 @@ def _projected_post_reservation(
     return projected
 
 
+def _budget_blocked_summary(item: dict, active_reservations: int) -> str:
+    """Explain signed admission arithmetic without implying a GitHub value."""
+    actual_remaining = item.get(
+        "remaining", item.get("reported_remaining", "—"))
+    return (
+        f"{item['resource']}: прогноз после резервов и оценки запуска "
+        f"{item['effective_after']} < безопасный остаток "
+        f"{item['minimum_remaining']} (фактический остаток GitHub "
+        f"{actual_remaining}; "
+        f"активных резервов {int(active_reservations)}; другими задачами "
+        f"зарезервировано {item['reserved_other']}; оценка этого запуска "
+        f"{item['requested_cost']})"
+    )
+
+
 def _budget_denied(policy: dict, *, state: str, reason: str,
                    now: float, limits: dict | None = None,
                    defer_at: float | None = None,
@@ -550,7 +565,7 @@ def _evaluate_github_budget(policy: dict, limits: dict | None, *,
             state = "budget_in_flight"
             reason_prefix = "GitHub API-бюджет временно занят выполняемой задачей"
         summary = ", ".join(
-            f"{item['resource']} {item['effective_after']} < {item['minimum_remaining']}"
+            _budget_blocked_summary(item, active_reservations)
             for item in blocked)
         return _budget_denied(
             policy, state=state, reason=f"{reason_prefix}: {summary}",
@@ -729,6 +744,7 @@ def _reservation_denied(policy: dict, limits: dict | None, result: dict, *,
                         status_revision: int | None) -> dict:
     now = time.time()
     blocked = result.get("blocked_resources") or []
+    active_reservations = int(result.get("active_reservations") or 0)
     if blocked:
         live_blocked = [item for item in blocked
                         if item.get("blocked_by") == "live"]
@@ -744,8 +760,8 @@ def _reservation_denied(policy: dict, limits: dict | None, result: dict, *,
             state = "budget_in_flight"
             reason_prefix = "GitHub API-бюджет временно занят выполняемой задачей"
         summary = ", ".join(
-            f"{item['resource']} {item['effective_after']} < "
-            f"{item['minimum_remaining']}" for item in blocked)
+            _budget_blocked_summary(item, active_reservations)
+            for item in blocked)
         reason = f"{reason_prefix}: {summary}"
     else:
         defer_at = now + policy["unavailable_retry_seconds"]
@@ -758,7 +774,7 @@ def _reservation_denied(policy: dict, limits: dict | None, result: dict, *,
         status_revision=status_revision,
         reserved_other=result.get("reserved_other"),
         effective_after=result.get("effective_after"),
-        active_reservations=int(result.get("active_reservations") or 0))
+        active_reservations=active_reservations)
 
 
 def _reserve_execution_admission(
diff --git a/promptpilot/static/index.html b/promptpilot/static/index.html
index 56276a7..318f894 100644
--- a/promptpilot/static/index.html
+++ b/promptpilot/static/index.html
@@ -1043,6 +1043,7 @@ <h2>Провайдеры <button class="btn btn-sm btn-ghost" style="margin-left
     const expanded = t.id === expandedId;
     const time = timeAgo(t.created_at);
     const parsed = parseResult(t.result);
+    const taskErrorLabel = githubApiWait(t) ? 'Причина ожидания' : 'Error';
 
     // Build result section
     let resultHTML = '';
@@ -1116,7 +1117,7 @@ <h2>Провайдеры <button class="btn btn-sm btn-ghost" style="margin-left
         ${resultHTML}
 
         ${t.error ? `
-          <div class="detail-label">Error</div>
+          <div class="detail-label">${taskErrorLabel}</div>
           <div class="result-block">
             <pre>${esc(t.error)}</pre>
             <button class="copy-btn" data-copy="${escAttr(t.error)}" onclick="copyText(event)">Copy</button>
diff --git a/tests/test_github_budget.py b/tests/test_github_budget.py
index 1877eea..df76556 100644
--- a/tests/test_github_budget.py
+++ b/tests/test_github_budget.py
@@ -130,6 +130,45 @@ def test_projected_budget_clamps_display_but_keeps_signed_admission_value():
     }
 
 
+def test_budget_denial_reason_explains_signed_projection_in_both_paths():
+    profile = _profile_with_costs(core=600)
+    profile["github_budget"]["minimum_remaining"] = {
+        "core": 250, "search": 0, "graphql": 0,
+    }
+    policy = pipeline_insights._budget_policy_for_route(
+        pipeline_insights._github_budget_policy(profile), "tool_preflight")
+    limits = _limits(core=1437)
+    reserved_other = {"core": 1400, "search": 0, "graphql": 0}
+    expected = (
+        "GitHub API-бюджет временно занят выполняемой задачей: "
+        "core: прогноз после резервов и оценки запуска -563 < безопасный "
+        "остаток 250 (фактический остаток GitHub 1437; активных резервов 1; "
+        "другими задачами зарезервировано 1400; оценка этого запуска 600)"
+    )
+
+    evaluated = pipeline_insights._evaluate_github_budget(
+        policy, limits, now=1000, reserved_other=reserved_other,
+        active_reservations=1)
+    reserved = pipeline_insights._reservation_denied(
+        policy, limits, {
+            "blocked_resources": [{
+                "resource": "core", "reported_remaining": 1437,
+                "reserved_other": 1400, "requested_cost": 600,
+                "effective_after": -563, "minimum_remaining": 250,
+                "reset": limits["core"]["reset"],
+                "blocked_by": "reservation",
+            }],
+            "reserved_other": reserved_other,
+            "effective_after": {
+                "core": -563, "search": 30, "graphql": 5000,
+            },
+            "active_reservations": 1,
+        }, status_revision=1)
+
+    assert evaluated["reason"] == expected
+    assert reserved["reason"] == expected
+
+
 def test_cost_schema_requires_every_known_route_and_exact_integer_vectors():
     profile = _profile_with_costs()
 
@@ -686,6 +725,18 @@ def test_web_dashboard_labels_projection_as_non_actual_github_remaining():
     assert "ledgerKnown ? budgetNumber(reservedBudget, 'core') : '—'" in html
 
 
+def test_web_task_detail_labels_only_pending_github_wait_as_wait_reason():
+    html = (Path(__file__).parents[1] / "promptpilot" / "static" /
+            "index.html").read_text(encoding="utf-8")
+
+    assert "const taskErrorLabel = githubApiWait(t) ? " \
+        "'Причина ожидания' : 'Error';" in html
+    assert "if (t.status !== 'pending'" in html
+    assert '<div class="detail-label">${taskErrorLabel}</div>' in html
+    assert '<pre>${esc(t.error)}</pre>' in html
+    assert 'data-copy="${escAttr(t.error)}"' in html
+
+
 def test_success_completion_uses_local_successor_graph_without_github_scan(
         isolated_db, monkeypatch):
     profile = _profile_with_costs()