diff --git a/CLAUDE.md b/CLAUDE.md
index 073466fb..61afd073 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -13,8 +13,8 @@ This is the DNAstack client library and CLI, a Python package that provides both
 ## Development Commands
 
 ### Development Setup
-- **IMPORTANT**: Run `eval "$(pyenv init -)" && pyenv activate dnastack-client` before any Python, make, uv, or git commit commands. This activates the correct pyenv virtualenv that has `uv` and other tools available.
 - `make setup` - Set up development environment with uv (creates .venv and installs dependencies)
+- Use `uv run <command>` for all Python commands — no virtualenv activation needed. `uv` is installed via Homebrew and available on PATH.
 
 ### Running the CLI
 - Use `uv run dnastack` to run the CLI (no virtual environment activation needed)
diff --git a/dnastack/cli/commands/publisher/questions/commands.py b/dnastack/cli/commands/publisher/questions/commands.py
index 7172cba5..d92a5432 100644
--- a/dnastack/cli/commands/publisher/questions/commands.py
+++ b/dnastack/cli/commands/publisher/questions/commands.py
@@ -1,3 +1,4 @@
+import time
 from typing import Optional
 
 import click
@@ -8,6 +9,7 @@
     validate_question_parameters,
 )
 from dnastack.cli.commands.explorer.questions.utils import handle_question_results_output
+from dnastack.cli.commands.publisher.questions.telemetry import submit_telemetry
 from dnastack.cli.core.command import formatted_command
 from dnastack.cli.core.command_spec import (
     ArgumentSpec,
@@ -21,6 +23,7 @@
 from dnastack.cli.helpers.iterator_printer import show_iterator
 from dnastack.common.logger import get_logger
 from dnastack.common.tracing import Span
+from dnastack.feature_flags import metrics_enabled
 
 logger = get_logger(__name__)
 
@@ -154,6 +157,16 @@ def ask_question(
             click.echo(f"Error: {e}", err=True)
             raise click.Abort()
 
-        results_iter = client.ask_question(collection, question_name, inputs, trace=trace)
-        results = list(results_iter)
+        start_time_ns = time.time_ns()
+        outcome = 'error'
+        row_count = None
+        try:
+            results_iter = client.ask_question(collection, question_name, inputs, trace=trace)
+            results = list(results_iter)
+            outcome = 'success'
+            row_count = len(results)
+        finally:
+            if metrics_enabled:
+                submit_telemetry(client, question_name, collection, start_time_ns, time.time_ns(), outcome, row_count=row_count)
+
         handle_question_results_output(results, output_file, output)
diff --git a/dnastack/cli/commands/publisher/questions/telemetry.py b/dnastack/cli/commands/publisher/questions/telemetry.py
new file mode 100644
index 00000000..6967fd27
--- /dev/null
+++ b/dnastack/cli/commands/publisher/questions/telemetry.py
@@ -0,0 +1,83 @@
+import platform
+from typing import Literal
+
+from dnastack.common.logger import get_logger
+
+logger = get_logger(__name__)
+
+try:
+    import importlib.metadata
+    _DNASTACK_VERSION = importlib.metadata.version('dnastack-client-library')
+except Exception:
+    _DNASTACK_VERSION = 'unknown'
+
+_SEVERITY_INFO = 9
+_SEVERITY_ERROR = 17
+
+
+def _build_message(question_name: str, outcome: Literal['success', 'error'], duration_ms: float, row_count: int | None) -> str:
+    if outcome == 'success':
+        suffix = f" ({row_count} rows)" if row_count is not None else ""
+        return f"Question '{question_name}' executed successfully in {duration_ms:.1f}ms{suffix}"
+    else:
+        return f"Question '{question_name}' failed after {duration_ms:.1f}ms"
+
+
+def build_otlp_log(
+    question_name: str,
+    collection: str,
+    start_time_ns: int,
+    end_time_ns: int,
+    outcome: Literal['success', 'error'],
+    row_count: int | None = None,
+) -> dict:
+    """Build an OTLP logs JSON payload for a single question execution event."""
+    duration_ms = (end_time_ns - start_time_ns) / 1_000_000
+    severity = _SEVERITY_INFO if outcome == 'success' else _SEVERITY_ERROR
+    message = _build_message(question_name, outcome, duration_ms, row_count)
+
+    attributes = [
+        {"key": "question.name", "value": {"stringValue": question_name}},
+        {"key": "question.collection", "value": {"stringValue": collection}},
+        {"key": "question.outcome", "value": {"stringValue": outcome}},
+        {"key": "question.duration_ms", "value": {"doubleValue": duration_ms}},
+        *([{"key": "question.row_count", "value": {"doubleValue": float(row_count)}}] if row_count is not None else []),
+        {"key": "runtime.python", "value": {"stringValue": platform.python_version()}},
+    ]
+
+    return {
+        "resourceLogs": [{
+            "resource": {
+                "attributes": [
+                    {"key": "service.name", "value": {"stringValue": "dnastack-client"}},
+                    {"key": "service.version", "value": {"stringValue": _DNASTACK_VERSION}},
+                ]
+            },
+            "scopeLogs": [{
+                "scope": {"name": "dnastack.publisher.questions"},
+                "logRecords": [{
+                    "timeUnixNano": str(end_time_ns),
+                    "severityNumber": severity,
+                    "body": {"stringValue": message},
+                    "attributes": attributes,
+                }]
+            }]
+        }]
+    }
+
+
+def submit_telemetry(
+    client,
+    question_name: str,
+    collection: str,
+    start_time_ns: int,
+    end_time_ns: int,
+    outcome: Literal['success', 'error'],
+    row_count: int | None = None,
+) -> None:
+    """Submit OTLP telemetry to collection-service. Errors are silently swallowed."""
+    try:
+        payload = build_otlp_log(question_name, collection, start_time_ns, end_time_ns, outcome, row_count)
+        client.submit_telemetry(payload)
+    except Exception as e:
+        logger.debug(f"Telemetry submission failed (non-fatal): {e}")
diff --git a/dnastack/client/collections/client.py b/dnastack/client/collections/client.py
index c4d28810..84e1d572 100644
--- a/dnastack/client/collections/client.py
+++ b/dnastack/client/collections/client.py
@@ -400,6 +400,15 @@ def ask_question(
             )
         )
 
+    def submit_telemetry(self, otlp_payload: dict, trace: Optional[Span] = None) -> None:
+        """Submit an OTLP logs payload. Best-effort — callers should handle failures gracefully."""
+        with self.create_http_session() as session:
+            session.post(
+                urljoin(self.url, 'otlp/v1/logs'),
+                json=otlp_payload,
+                trace_context=trace
+            )
+
     def data_connect_endpoint(self,
                               collection: Union[str, Collection, None] = None,
                               no_auth: bool = False) -> ServiceEndpoint:
diff --git a/dnastack/feature_flags.py b/dnastack/feature_flags.py
index 0473b3d9..a50fb844 100644
--- a/dnastack/feature_flags.py
+++ b/dnastack/feature_flags.py
@@ -34,3 +34,6 @@ def on_debug_mode_change(hook: Callable[[bool], None]):
 detailed_error = flag('DNASTACK_DETAILED_ERROR', description='Provide more details on error')
 show_distributed_trace_stack_on_error = flag('DNASTACK_DISPLAY_TRACE_ON_ERROR',
                                              description='Display distributed trace on error')
+
+metrics_enabled = flag('DNASTACK_METRICS_ENABLED',
+                       description='Enable telemetry submission after publisher question execution')
diff --git a/tests/unit/client/__init__.py b/tests/unit/client/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/unit/client/test_collection_service_client.py b/tests/unit/client/test_collection_service_client.py
new file mode 100644
index 00000000..76298880
--- /dev/null
+++ b/tests/unit/client/test_collection_service_client.py
@@ -0,0 +1,45 @@
+from unittest.mock import MagicMock, patch
+
+from dnastack.client.collections.client import CollectionServiceClient
+from dnastack.client.models import ServiceEndpoint
+
+
+def _make_client(url='http://localhost:8093/'):
+    client = CollectionServiceClient.__new__(CollectionServiceClient)
+    client._endpoint = MagicMock(spec=ServiceEndpoint)
+    client._endpoint.url = url
+    return client
+
+
+class TestSubmitTelemetry:
+
+    def test_posts_to_otlp_logs_endpoint(self):
+        client = _make_client()
+        mock_session = MagicMock()
+        mock_session.__enter__ = MagicMock(return_value=mock_session)
+        mock_session.__exit__ = MagicMock(return_value=False)
+
+        with patch.object(client, 'create_http_session', return_value=mock_session):
+            client.submit_telemetry({'resourceLogs': []})
+
+        mock_session.post.assert_called_once_with(
+            'http://localhost:8093/otlp/v1/logs',
+            json={'resourceLogs': []},
+            trace_context=None
+        )
+
+    def test_passes_trace_context_when_provided(self):
+        client = _make_client()
+        mock_session = MagicMock()
+        mock_session.__enter__ = MagicMock(return_value=mock_session)
+        mock_session.__exit__ = MagicMock(return_value=False)
+        mock_trace = MagicMock()
+
+        with patch.object(client, 'create_http_session', return_value=mock_session):
+            client.submit_telemetry({'resourceLogs': []}, trace=mock_trace)
+
+        mock_session.post.assert_called_once_with(
+            'http://localhost:8093/otlp/v1/logs',
+            json={'resourceLogs': []},
+            trace_context=mock_trace
+        )
diff --git a/tests/unit/publisher/__init__.py b/tests/unit/publisher/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/unit/publisher/test_ask_question_telemetry.py b/tests/unit/publisher/test_ask_question_telemetry.py
new file mode 100644
index 00000000..a2b1a678
--- /dev/null
+++ b/tests/unit/publisher/test_ask_question_telemetry.py
@@ -0,0 +1,87 @@
+from unittest.mock import MagicMock, patch
+
+import click
+from click.testing import CliRunner
+
+
+def _build_cli():
+    from dnastack.cli.commands.publisher.questions.commands import init_questions_commands
+
+    @click.group()
+    def cli():
+        pass
+
+    init_questions_commands(cli)
+    return cli
+
+
+def _make_mock_client(raises=False):
+    mock_client = MagicMock()
+    mock_client.get_question.return_value = MagicMock(parameters=[])
+    if raises:
+        mock_client.ask_question.side_effect = RuntimeError("network failure")
+    else:
+        mock_client.ask_question.return_value = iter([{'col': 'val'}])
+    return mock_client
+
+
+class TestAskQuestionTelemetry:
+
+    def _invoke(self, metrics_enabled=True, raises=False):
+        mock_client = _make_mock_client(raises=raises)
+        cli = _build_cli()
+
+        with patch('dnastack.cli.commands.publisher.questions.commands.get_collection_service_client',
+                   return_value=mock_client), \
+             patch('dnastack.cli.commands.publisher.questions.commands.metrics_enabled', metrics_enabled), \
+             patch('dnastack.cli.commands.publisher.questions.commands.handle_question_results_output'), \
+             patch('dnastack.cli.commands.publisher.questions.commands.submit_telemetry') as mock_submit:
+            runner = CliRunner()
+            runner.invoke(cli, ['ask', '--question-name', 'q', '--collection', 'c'])
+
+        return mock_client, mock_submit
+
+    def test_submits_telemetry_on_success_when_enabled(self):
+        _, mock_submit = self._invoke(metrics_enabled=True)
+        mock_submit.assert_called_once()
+
+    def test_does_not_submit_when_disabled(self):
+        _, mock_submit = self._invoke(metrics_enabled=False)
+        mock_submit.assert_not_called()
+
+    def test_submits_with_success_outcome_on_success(self):
+        _, mock_submit = self._invoke(metrics_enabled=True)
+        args, kwargs = mock_submit.call_args
+        # submit_telemetry(client, question_name, collection, start_ns, end_ns, outcome)
+        outcome = args[5]
+        assert outcome == 'success'
+
+    def test_submits_with_error_outcome_on_failure(self):
+        _, mock_submit = self._invoke(metrics_enabled=True, raises=True)
+        mock_submit.assert_called_once()
+        args, kwargs = mock_submit.call_args
+        outcome = args[5]
+        assert outcome == 'error'
+
+    def test_question_name_and_collection_passed_to_telemetry(self):
+        _, mock_submit = self._invoke(metrics_enabled=True)
+        args, kwargs = mock_submit.call_args
+        # submit_telemetry(client, question_name, collection, start_ns, end_ns, outcome)
+        assert args[1] == 'q'
+        assert args[2] == 'c'
+
+    def test_original_exception_propagates(self):
+        """Telemetry submission in finally must not swallow the original exception."""
+        mock_client = _make_mock_client(raises=True)
+        cli = _build_cli()
+
+        with patch('dnastack.cli.commands.publisher.questions.commands.get_collection_service_client',
+                   return_value=mock_client), \
+             patch('dnastack.cli.commands.publisher.questions.commands.metrics_enabled', True), \
+             patch('dnastack.cli.commands.publisher.questions.commands.submit_telemetry'), \
+             patch('dnastack.cli.commands.publisher.questions.commands.handle_question_results_output'):
+            runner = CliRunner()
+            result = runner.invoke(cli, ['ask', '--question-name', 'q', '--collection', 'c'])
+
+        # CliRunner catches exceptions — verify the exception was raised (exit code != 0)
+        assert result.exit_code != 0
diff --git a/tests/unit/publisher/test_telemetry.py b/tests/unit/publisher/test_telemetry.py
new file mode 100644
index 00000000..fcc45c79
--- /dev/null
+++ b/tests/unit/publisher/test_telemetry.py
@@ -0,0 +1,102 @@
+import time
+from unittest.mock import MagicMock
+
+from dnastack.cli.commands.publisher.questions.telemetry import build_otlp_log, submit_telemetry
+
+
+class TestBuildOtlpLog:
+
+    def test_returns_valid_otlp_logs_structure(self):
+        start_ns = time.time_ns()
+        end_ns = start_ns + 1_000_000_000
+        payload = build_otlp_log('my-question', 'my-collection', start_ns, end_ns, 'success')
+
+        assert 'resourceLogs' in payload
+        resource_logs = payload['resourceLogs']
+        assert len(resource_logs) == 1
+        scope_logs = resource_logs[0]['scopeLogs']
+        assert len(scope_logs) == 1
+        log_records = scope_logs[0]['logRecords']
+        assert len(log_records) == 1
+
+    def test_success_outcome_sets_severity_info(self):
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, 1, 'success'))
+        assert lr['severityNumber'] == 9
+
+    def test_error_outcome_sets_severity_error(self):
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, 1, 'error'))
+        assert lr['severityNumber'] == 17
+
+    def test_attributes_include_question_name_and_collection(self):
+        lr = _first_log_record(build_otlp_log('my-q', 'my-col', 0, 1, 'success'))
+        attrs = _string_attrs(lr)
+        assert attrs['question.name'] == 'my-q'
+        assert attrs['question.collection'] == 'my-col'
+        assert attrs['question.outcome'] == 'success'
+
+    def test_duration_ms_is_calculated_from_start_and_end(self):
+        start_ns = 1_000_000_000
+        end_ns = 2_500_000_000  # 1500 ms later
+        lr = _first_log_record(build_otlp_log('q', 'c', start_ns, end_ns, 'success'))
+        double_attrs = _double_attrs(lr)
+        assert double_attrs['question.duration_ms'] == 1500.0
+
+    def test_row_count_included_when_provided(self):
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, 1, 'success', row_count=42))
+        assert _double_attrs(lr)['question.row_count'] == 42.0
+
+    def test_row_count_omitted_when_not_provided(self):
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, 1, 'error'))
+        assert 'question.row_count' not in [a['key'] for a in lr['attributes']]
+
+    def test_resource_attributes_include_service_name(self):
+        payload = build_otlp_log('q', 'c', 0, 1, 'success')
+        resource_attrs = {a['key']: a['value']['stringValue']
+                         for a in payload['resourceLogs'][0]['resource']['attributes']}
+        assert resource_attrs['service.name'] == 'dnastack-client'
+
+    def test_time_unix_nano_is_end_time(self):
+        end_ns = 1_713_369_601_000_000_000
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, end_ns, 'success'))
+        assert lr['timeUnixNano'] == str(end_ns)
+
+    def test_success_message_includes_question_name_and_duration(self):
+        start_ns = 0
+        end_ns = 1_500_000_000  # 1500 ms
+        lr = _first_log_record(build_otlp_log('my-question', 'c', start_ns, end_ns, 'success'))
+        assert 'my-question' in lr['body']['stringValue']
+        assert '1500.0ms' in lr['body']['stringValue']
+
+    def test_success_message_includes_row_count_when_provided(self):
+        lr = _first_log_record(build_otlp_log('q', 'c', 0, 1_000_000_000, 'success', row_count=7))
+        assert '7 rows' in lr['body']['stringValue']
+
+    def test_error_message_includes_question_name_and_duration(self):
+        lr = _first_log_record(build_otlp_log('bad-question', 'c', 0, 500_000_000, 'error'))
+        assert 'bad-question' in lr['body']['stringValue']
+        assert '500.0ms' in lr['body']['stringValue']
+
+
+class TestSubmitTelemetry:
+
+    def test_calls_client_submit_telemetry(self):
+        client = MagicMock()
+        submit_telemetry(client, 'q', 'c', 0, 1, 'success')
+        client.submit_telemetry.assert_called_once()
+
+    def test_swallows_client_errors_silently(self):
+        client = MagicMock()
+        client.submit_telemetry.side_effect = Exception("network error")
+        submit_telemetry(client, 'q', 'c', 0, 1, 'success')  # must not raise
+
+
+def _first_log_record(otlp_payload: dict) -> dict:
+    return otlp_payload['resourceLogs'][0]['scopeLogs'][0]['logRecords'][0]
+
+
+def _string_attrs(log_record: dict) -> dict:
+    return {a['key']: a['value']['stringValue'] for a in log_record['attributes'] if 'stringValue' in a['value']}
+
+
+def _double_attrs(log_record: dict) -> dict:
+    return {a['key']: a['value']['doubleValue'] for a in log_record['attributes'] if 'doubleValue' in a['value']}
diff --git a/tests/unit/test_feature_flags.py b/tests/unit/test_feature_flags.py
new file mode 100644
index 00000000..fd865848
--- /dev/null
+++ b/tests/unit/test_feature_flags.py
@@ -0,0 +1,24 @@
+import importlib
+import os
+
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def clean_metrics_env():
+    os.environ.pop('DNASTACK_METRICS_ENABLED', None)
+    yield
+    os.environ.pop('DNASTACK_METRICS_ENABLED', None)
+
+
+def test_metrics_enabled_defaults_to_false():
+    import dnastack.feature_flags as ff
+    importlib.reload(ff)
+    assert ff.metrics_enabled is False
+
+
+def test_metrics_enabled_is_true_when_set_to_1():
+    os.environ['DNASTACK_METRICS_ENABLED'] = '1'
+    import dnastack.feature_flags as ff
+    importlib.reload(ff)
+    assert ff.metrics_enabled is True