diff --git a/.env.example b/.env.example
index 07d8c6b..be60f22 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,8 @@
 ALPHA_RESEARCH_ENV=local
 ALPHA_RESEARCH_TRACKING_URI=./mlruns
 ALPHA_RESEARCH_LOG_LEVEL=INFO
+
+# Optional configured adapter values. Keep real secrets in local .env only.
+ALPHA_RESEARCH_PROVIDER_USER_AGENT=alpha-research-local/0.1
+ALPHA_RESEARCH_SAMPLE_API_KEY=replace-me
+ALPHA_RESEARCH_LOCAL_MARKET_PATH=./tests/fixtures/market.csv
diff --git a/README.md b/README.md
index 89baae7..f937318 100644
--- a/README.md
+++ b/README.md
@@ -114,5 +114,6 @@ python .\scripts\run_release_smoke.py --root . --mode live-public
 Это не набор взаимозаменяемых костылей. У каждого режима свой capability contract: можно ли строить release bundle, требуется ли external proof и допустим ли synthetic ingest.
 
 Для локального воспроизводимого прогона есть отдельный runbook: `docs/runbooks/reproducible_local_runbook.md`.
+Для безопасной настройки configured adapters есть runbook: `docs/runbooks/configured_adapter_environment.md`.
 Для отдельного тяжелого smoke-прогона есть workflow `.github/workflows/release_smoke.yml`.
 Для честной сверки реализации со спецификацией есть `docs/status/spec_coverage_map.yaml` и `docs/status/spec_gap_audit.md`.
diff --git a/docs/runbooks/configured_adapter_environment.md b/docs/runbooks/configured_adapter_environment.md
new file mode 100644
index 0000000..c3a1dc3
--- /dev/null
+++ b/docs/runbooks/configured_adapter_environment.md
@@ -0,0 +1,33 @@
+# Configured adapter environment runbook
+
+Configured adapters can read local paths, API keys, and user-agent values from
+environment variables declared in `configs/data_sources.yaml`. This keeps the
+repository reproducible while allowing private live-provider settings locally.
+
+## Safe local pattern
+
+1. Copy `.env.example` to `.env`.
+2. Replace placeholder values only in `.env`.
+3. Keep `.env` untracked.
+4. Prefer configured-local smoke for pull requests.
+5. Use live-public smoke only when the pull request explicitly changes external
+   provider behavior.
+
+## Adapter fields
+
+| Field | Meaning | Failure mode |
+| --- | --- | --- |
+| `local_path` | Explicit repository-relative or absolute fixture path. | Permanent error when the file is missing. |
+| `local_path_env` | Environment variable that points to a local fixture path. | Permanent error when both `local_path` and the env value are missing. |
+| `api_key_env` | Environment variable that stores a live-provider credential. | Omitted from request when missing unless the provider requires it. |
+| `api_key_header` | Header name used for the resolved API key. | Ignored when no API key is available. |
+| `api_key_query_param` | Query parameter used for the resolved API key. | Ignored when no API key is available. |
+| `user_agent_env` | Environment variable for a provider-specific user agent. | Falls back to `Mozilla/5.0` when missing. |
+
+## Review checklist
+
+- `.env.example` contains placeholders only.
+- No real provider key appears in diffs or test fixtures.
+- Tests monkeypatch environment variables instead of depending on local shell
+  state.
+- Error messages name the adapter and the missing setting.
diff --git a/src/alpha_research/data/providers/configured_transport.py b/src/alpha_research/data/providers/configured_transport.py
index 6176d2c..d341c91 100644
--- a/src/alpha_research/data/providers/configured_transport.py
+++ b/src/alpha_research/data/providers/configured_transport.py
@@ -29,6 +29,28 @@ class ConfiguredAdapterPermanentError(ConfiguredAdapterError):
     pass
 
 
+@dataclass(frozen=True)
+class AdapterEnvironmentDiagnostics:
+    adapter_name: str
+    local_path_env: str | None
+    local_path_env_present: bool
+    api_key_env: str | None
+    api_key_env_present: bool
+    user_agent_env: str | None
+    user_agent_env_present: bool
+
+    def as_dict(self) -> dict[str, bool | str | None]:
+        return {
+            "adapter_name": self.adapter_name,
+            "local_path_env": self.local_path_env,
+            "local_path_env_present": self.local_path_env_present,
+            "api_key_env": self.api_key_env,
+            "api_key_env_present": self.api_key_env_present,
+            "user_agent_env": self.user_agent_env,
+            "user_agent_env_present": self.user_agent_env_present,
+        }
+
+
 @dataclass(frozen=True)
 class ResponseCache:
     root: Path
@@ -59,17 +81,35 @@ def resolve_env(name: str | None) -> str | None:
     return value.strip() if isinstance(value, str) and value.strip() else None
 
 
+def adapter_environment_diagnostics(adapter: AdapterConfig) -> AdapterEnvironmentDiagnostics:
+    return AdapterEnvironmentDiagnostics(
+        adapter_name=adapter.adapter_name,
+        local_path_env=adapter.local_path_env,
+        local_path_env_present=resolve_env(adapter.local_path_env) is not None,
+        api_key_env=adapter.api_key_env,
+        api_key_env_present=resolve_env(adapter.api_key_env) is not None,
+        user_agent_env=adapter.user_agent_env,
+        user_agent_env_present=resolve_env(adapter.user_agent_env) is not None,
+    )
+
+
 def resolve_local_path(adapter: AdapterConfig, root: Path) -> Path:
     local_path = adapter.local_path or resolve_env(adapter.local_path_env)
     if not local_path:
+        diagnostics = adapter_environment_diagnostics(adapter)
         raise ConfiguredAdapterPermanentError(
-            f"Для adapter `{adapter.adapter_name}` не указан local_path и не задан env `{adapter.local_path_env}`."
+            f"Для adapter `{adapter.adapter_name}` не указан local_path и не задан env `{adapter.local_path_env}`. "
+            f"diagnostics={diagnostics.as_dict()}"
         )
     candidate = Path(local_path)
     if not candidate.is_absolute():
         candidate = (root / candidate).resolve()
     if not candidate.exists():
-        raise ConfiguredAdapterPermanentError(f"Локальный файл для adapter `{adapter.adapter_name}` не найден: {candidate}")
+        source = "local_path" if adapter.local_path else f"env `{adapter.local_path_env}`"
+        raise ConfiguredAdapterPermanentError(
+            f"Локальный файл для adapter `{adapter.adapter_name}` не найден: {candidate} "
+            f"(source={source})."
+        )
     return candidate
 
 
diff --git a/tests/unit/test_configured_transport_env.py b/tests/unit/test_configured_transport_env.py
new file mode 100644
index 0000000..dd18032
--- /dev/null
+++ b/tests/unit/test_configured_transport_env.py
@@ -0,0 +1,89 @@
+from __future__ import annotations
+
+from alpha_research.config.models import AdapterConfig
+from alpha_research.data.providers.configured_transport import (
+    ConfiguredAdapterPermanentError,
+    adapter_environment_diagnostics,
+    provider_headers,
+    resolve_env,
+    resolve_local_path,
+)
+
+
+def test_resolve_env_strips_blank_values(monkeypatch) -> None:
+    monkeypatch.setenv("ALPHA_RESEARCH_TEST_VALUE", "  usable-value  ")
+    monkeypatch.setenv("ALPHA_RESEARCH_BLANK_VALUE", "   ")
+
+    assert resolve_env("ALPHA_RESEARCH_TEST_VALUE") == "usable-value"
+    assert resolve_env("ALPHA_RESEARCH_BLANK_VALUE") is None
+    assert resolve_env(None) is None
+
+
+def test_adapter_environment_diagnostics_reports_presence_without_values(monkeypatch) -> None:
+    monkeypatch.setenv("ALPHA_RESEARCH_API_KEY", "secret-value")
+    monkeypatch.setenv("ALPHA_RESEARCH_USER_AGENT", "alpha-research-test")
+
+    adapter = AdapterConfig(
+        adapter_name="diagnostic_adapter",
+        adapter_type="http",
+        api_key_env="ALPHA_RESEARCH_API_KEY",
+        local_path_env="ALPHA_RESEARCH_LOCAL_PATH",
+        user_agent_env="ALPHA_RESEARCH_USER_AGENT",
+    )
+
+    diagnostics = adapter_environment_diagnostics(adapter)
+
+    assert diagnostics.api_key_env_present is True
+    assert diagnostics.user_agent_env_present is True
+    assert diagnostics.local_path_env_present is False
+    assert diagnostics.as_dict()["api_key_env"] == "ALPHA_RESEARCH_API_KEY"
+
+
+def test_provider_headers_uses_default_user_agent_when_env_missing(monkeypatch) -> None:
+    monkeypatch.delenv("ALPHA_RESEARCH_USER_AGENT", raising=False)
+    adapter = AdapterConfig(
+        adapter_name="headers_adapter",
+        adapter_type="http",
+        user_agent_env="ALPHA_RESEARCH_USER_AGENT",
+    )
+
+    assert provider_headers(adapter)["User-Agent"] == "Mozilla/5.0"
+
+
+def test_resolve_local_path_error_names_missing_env(tmp_path, monkeypatch) -> None:
+    monkeypatch.delenv("ALPHA_RESEARCH_LOCAL_PATH", raising=False)
+    adapter = AdapterConfig(
+        adapter_name="local_fixture_adapter",
+        adapter_type="local_file_market_daily",
+        local_path_env="ALPHA_RESEARCH_LOCAL_PATH",
+    )
+
+    try:
+        resolve_local_path(adapter, tmp_path)
+    except ConfiguredAdapterPermanentError as exc:
+        message = str(exc)
+    else:
+        raise AssertionError("Expected missing local path to raise a permanent adapter error")
+
+    assert "local_fixture_adapter" in message
+    assert "ALPHA_RESEARCH_LOCAL_PATH" in message
+    assert "local_path_env_present" in message
+
+
+def test_resolve_local_path_error_names_missing_file_source(tmp_path) -> None:
+    adapter = AdapterConfig(
+        adapter_name="missing_file_adapter",
+        adapter_type="local_file_market_daily",
+        local_path="fixtures/missing.csv",
+    )
+
+    try:
+        resolve_local_path(adapter, tmp_path)
+    except ConfiguredAdapterPermanentError as exc:
+        message = str(exc)
+    else:
+        raise AssertionError("Expected missing fixture file to raise a permanent adapter error")
+
+    assert "missing_file_adapter" in message
+    assert "fixtures" in message
+    assert "source=local_path" in message