structured_log_riverpod 0.1.0-dev.1

StructuredLogRiverpodObserver — a ProviderObserver that turns the lifecycle of every Riverpod provider (created, updated, failed, removed) into structured_log entries. Works with flutter_riverpod as is.

structured_log_riverpod

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See what every Riverpod provider in your app did — created, updated, failed, removed — as structured log entries, with one line of setup.

Documentation: structured-log.openidealab.com.

Why

"Why is this screen empty?" is a question a Riverpod app keeps asking, and the answer is usually a provider that failed, or one that never got the value you expected. Without a record you reproduce the bug under a debugger or add a ProviderObserver that prints — and on a user's device you can do neither.

StructuredLogRiverpodObserver keeps the record for you. Passed to the container once, it writes the creation, updates, failures and removal of every provider as structured_log entries — with the provider's name, its family argument and the values involved as separate fields, so you can filter the story of one provider out of everything else.

Features

Coverage

• One line to install — ProviderScope(observers: [StructuredLogRiverpodObserver()]).
• The whole life of a provider — creation, updates, failures with stack traces, removal.
• Providers told apart — by name, or by type when there is none; a family's argument is a field of its own.
• Each failure once — Riverpod reports a failing future twice, as an update to AsyncError and as a failure; the observer logs the failure and skips the update.
• Works with flutter_riverpod and hooks_riverpod as is — depends on package:riverpod only, which both are built on, so it also runs in pure Dart.

Control

• Its own category — every entry carries category: 'riverpod', so a LogSink can route provider traffic separately and the in-app log viewer offers it as a filter.
• A level per hook — or null to turn a hook off, usually the updates.
• A filter — leave noisy providers out of the log entirely.
• Values under your control — values and family arguments go through a describer you can replace, to keep secrets out of the log or hand redactKeys a map.

Safety

• Never breaks a provider — a toString() or describer that throws costs the entry its values, and a filter that throws costs the entry, but neither reaches the code that changed the state.
• Costs nothing when off — a hook that is off, a provider that is filtered out or a level no sink takes never has its value described.

Where it fits

The observer needs nothing but structured_log — no server, no Flutter. Its entries flow to whatever sinks you have configured: the console, a file, an in-app log viewer (structured_log_material, structured_log_fluent or structured_log_cupertino), where the riverpod category becomes a filter, or a self-hosted structured_log_server through structured_log_remote_sync. It is one of eight adapters that log what your app's libraries already do; the whole project is at structured-log.openidealab.com.

Installation

Riverpod 3 only. The observer hooks of Riverpod 2.x have other signatures, and one class cannot override both; for 2.x this package does not work.

Not yet published to pub.dev (0.1.0-dev.0) — depend on it from git for now:

dependencies:
  flutter_riverpod: ^3.0.0 # or riverpod: ^3.0.0
  structured_log: ^0.3.0
  structured_log_riverpod:
    git:
      url: https://github.com/pese-git/structured_log.git
      path: emb/structured_log_riverpod

Quick Start

import 'package:flutter/widgets.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:structured_log/structured_log.dart';
import 'package:structured_log_riverpod/structured_log_riverpod.dart';

void main() {
  StructlogConfiguration.configure(
    sinks: [LogSink(name: 'console', output: coloredConsoleOutput)],
  );

  runApp(
    ProviderScope(
      observers: [StructuredLogRiverpodObserver()],
      child: const MyApp(),
    ),
  );
}

In pure Dart pass the same observer to the container: ProviderContainer(observers: [StructuredLogRiverpodObserver()]).

A named counter provider that is read and then set to 1 logs:

[2026-10-13T22:27:13.862226Z] DEBUG: provider_added {"logger":"riverpod","category":"riverpod","provider":"counter","value":"0","value_type":"int"}
[2026-10-13T22:27:13.875054Z] DEBUG: provider_updated {"logger":"riverpod","category":"riverpod","provider":"counter","previous_value":"0","value":"1","value_type":"int"}

A failing FutureProvider named profile logs once, as an error:

[2026-10-13T22:27:13.884681Z] ERROR: provider_failed {"logger":"riverpod","category":"riverpod","provider":"profile","error":"Bad state: offline","error_type":"StateError","stack_trace":"#0 ..."}

See example/main.dart for a runnable version (dart run example/main.dart).

What gets logged

Every entry carries category (riverpod by default), logger (riverpod by default) and provider: the provider's name, or its type when it has no name. For a family, provider_argument holds the argument.

Hook	event	Default level	Fields
didAddProvider	provider_added	debug	value, value_type
didUpdateProvider	provider_updated	debug	previous_value, value, value_type
providerDidFail	provider_failed	error	error, error_type, stack_trace
didUnmountProvider	provider_disposed	debug	—

A provider that throws while building is logged as provider_added with no value and value_type: Null, then as provider_failed.

provider_disposed is written when a provider is removed from memory, for example an autoDispose provider that lost its last listener. A provider that merely rebuilds — a dependency changed, refresh, invalidate — is not disposed, and writes no entry of that name. The hook behind it, didUnmountProvider, exists from riverpod 3.3.2: on 3.0.0–3.2.1 this entry is not written at all, and nothing tells you so. The other three entries are the same on every 3.x. If you need provider_disposed, depend on riverpod: ^3.3.2.

Mutations (mutationStart and friends, new in Riverpod 3) are not logged: their API is marked experimental.

Keeping secrets out of the log

Values and family arguments are logged through toString() by default (cut to 1000 characters). If they can carry passwords, tokens or personal data — and especially if the log leaves the device through structured_log_remote_sync — pass a describe that withholds them. Returning null drops the value and keeps its type:

StructuredLogRiverpodObserver(
  describe: (value) => switch (value) {
    Session() || Credentials() => null,
    _ => describeRiverpodValue(value),
  },
)

The same describe sees the family argument, which is often a user id or a token, so one function covers both. To log types only, everywhere: describe: (_) => null.

A describe can also return a map instead of a string. A map stays a structure in the entry, so a redactKeys processor reaches its fields, as it reaches any other field. A string from toString() is opaque to it:

StructlogConfiguration.configure(processors: [redactKeys(), dropNullValues]);

StructuredLogRiverpodObserver(
  describe: (value) => switch (value) {
    Session(:final user, :final token) => {'user': user, 'token': token},
    _ => describeRiverpodValue(value),
  },
)
// value: {"user": "u", "token": "***"}

The error of provider_failed is not run through describe: it is written by structured_log itself, as error, error_type and stack_trace.

Configuration

StructuredLogRiverpodObserver(
  // Which hooks are logged, and at what level; null turns one off.
  levels: const RiverpodLogLevels(
    added: LogLevel.trace,
    updated: null, // a provider bound to a text field updates all the time
  ),
  // Leave noisy providers out.
  filter: (provider) => provider.name != 'ticker',
  category: 'state',
)

API Reference

Symbol	Description
StructuredLogRiverpodObserver({logger, loggerName, category, levels, describe, filter})	The observer, a final class extending ProviderObserver. Without logger, it calls getLogger(loggerName) on every hook, so a later StructlogConfiguration.configure reaches it too. category: null binds no category.
RiverpodLogLevels({added, updated, failed, disposed})	A LogLevel? per hook; null turns the hook off.
RiverpodValueDescriber	Object? Function(Object? value) — turns a value or a family argument into an entry value; null omits the field.
describeRiverpodValue(value)	The default describer: toString(), cut to defaultRiverpodValueMaxLength (1000) characters; a throwing toString() becomes a placeholder.

Related packages

The rest of the structured_log family:

Core

• structured_log — structured JSON logging with context binding, processors and multi-sink routing

In-app log viewer

• structured_log_flutter — headless viewer core: LogBuffer and LogViewerController
• structured_log_material — Material 3 log viewer
• structured_log_fluent — Fluent UI (WinUI-style) log viewer
• structured_log_cupertino — Cupertino (iOS-style) log viewer

Shipping logs to a server

• structured_log_remote_sync — batching, retrying sink for a self-hosted structured_log_server

Integrations

• structured_log_bloc — BlocObserver for bloc/flutter_bloc
• structured_log_dio — dio interceptor that logs HTTP calls
• structured_log_http_client — package:http client wrapper that logs HTTP calls
• structured_log_go_router — logs go_router navigation
• structured_log_cherrypick — observer for the cherrypick DI container
• structured_log_drift — drift QueryInterceptor that logs queries, failures and transactions
• structured_log_logging — bridge that routes package:logging records into structured_log

License

MIT — see LICENSE.