diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f09135..6a0fddc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- **`quickUtils.logLevel` now does something.** It was declared, described in
+  both language files, documented and offered in the settings editor — and no
+  code read it, so setting it changed nothing. It is a *floor*: VS Code owns a
+  `LogOutputChannel`'s level, per channel, in the Output panel, so this can make
+  the log quieter but cannot turn on output VS Code is already dropping. Use
+  **Developer: Set Log Level** for that. The level is read per entry, so a
+  change applies immediately rather than after a reload.
+
 ## [0.3.0] - 2026-08-08
 
 Three new features, and a rebuild on `@kkdev92/vscode-ext-kit` 3.x underneath
diff --git a/src/core/logging.ts b/src/core/logging.ts
new file mode 100644
index 0000000..79952c9
--- /dev/null
+++ b/src/core/logging.ts
@@ -0,0 +1,75 @@
+/**
+ * `quickUtils.logLevel`, applied.
+ *
+ * The framework logs into a `LogOutputChannel`, and VS Code filters that by the
+ * level chosen in the Output panel — per channel, persisted, and not something
+ * an extension can raise for itself. So this setting is a *floor* on top of
+ * that: it can make the log quieter, never louder. `Developer: Set Log Level`
+ * is what turns `debug` back on.
+ *
+ * The level is read per call rather than captured, because the services that
+ * hold a logger are singletons built once at activation — capturing would mean
+ * the setting only took effect after a reload, which is not what a settings
+ * change looks like anywhere else in this extension.
+ */
+
+import { serviceToken, type Logger, type ServiceToken } from '@kkdev92/vscode-ext-kit';
+
+/** The values `quickUtils.logLevel` accepts, in severity order. */
+export type LogLevel = 'trace' | 'debug' | 'info' | 'warn' | 'error';
+
+const SEVERITY: Record<LogLevel, number> = {
+  trace: 0,
+  debug: 1,
+  info: 2,
+  warn: 3,
+  error: 4,
+};
+
+/**
+ * Wraps `logger` so entries below `level()` are dropped.
+ *
+ * `withFields` returns a filtered child rather than the bare one, so a scoped
+ * logger handed to a feature keeps the floor.
+ */
+export function filtered(logger: Logger, level: () => LogLevel): Logger {
+  const passes = (of: LogLevel): boolean => SEVERITY[of] >= SEVERITY[level()];
+  return {
+    trace: (message, fields): void => {
+      if (passes('trace')) {
+        logger.trace(message, fields);
+      }
+    },
+    debug: (message, fields): void => {
+      if (passes('debug')) {
+        logger.debug(message, fields);
+      }
+    },
+    info: (message, fields): void => {
+      if (passes('info')) {
+        logger.info(message, fields);
+      }
+    },
+    warn: (message, fields): void => {
+      if (passes('warn')) {
+        logger.warn(message, fields);
+      }
+    },
+    error: (message, error, fields): void => {
+      if (passes('error')) {
+        logger.error(message, error, fields);
+      }
+    },
+    withFields: (fields): Logger => filtered(logger.withFields(fields), level),
+  };
+}
+
+/**
+ * The logger everything in this extension is given.
+ *
+ * A token rather than the framework's `Log` directly, because the ambient set
+ * in `./services` names one logger for the whole module — swapping it here is
+ * what makes the setting apply to every feature at once, instead of each one
+ * remembering to wrap.
+ */
+export const AppLog: ServiceToken<Logger> = serviceToken<Logger>('quickUtils.log');
diff --git a/src/core/services.ts b/src/core/services.ts
index d101d83..d8923bc 100644
--- a/src/core/services.ts
+++ b/src/core/services.ts
@@ -14,7 +14,6 @@
 import {
   Editors,
   Localization,
-  Log,
   Notifications,
   QuickInput,
   type CommandsService,
@@ -26,6 +25,7 @@ import {
 } from '@kkdev92/vscode-ext-kit';
 
 import { EditorSettings, Settings } from './config';
+import { AppLog } from './logging';
 import type { RegexClient } from '../regex/client';
 
 /**
@@ -36,8 +36,12 @@ import type { RegexClient } from '../regex/client';
  * exactly the drift nobody notices until a member is silently `unknown`.
  */
 export const uses = {
-  /** Scoped per feature, so an entry says where it came from. */
-  logger: Log,
+  /**
+   * Scoped per feature, so an entry says where it came from — and filtered by
+   * `quickUtils.logLevel`, which is why it is {@link AppLog} rather than the
+   * framework's `Log`.
+   */
+  logger: AppLog,
   /** This extension's settings. */
   config: Settings.token,
   /** `editor.*`, for the settings VS Code owns. */
diff --git a/src/extension.ts b/src/extension.ts
index 1caee50..da2753b 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -35,7 +35,8 @@ import * as vscode from 'vscode';
 import { KIT_VERSION } from './core/build';
 import * as Cmd from './core/commands';
 import { EditorSettings, Settings, resolveJsonIndent } from './core/config';
-import { EXTENSION_ID, EXTENSION_NAME, PUBLISHER, REGEX_TESTER_VIEW_TYPE, VIEWS } from './core/constants';
+import { CONFIG, EXTENSION_ID, EXTENSION_NAME, PUBLISHER, REGEX_TESTER_VIEW_TYPE, VIEWS } from './core/constants';
+import { AppLog, filtered } from './core/logging';
 import { uses, type TesterServices } from './core/services';
 import {
   DefaultSecret,
@@ -150,6 +151,14 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
 
   // ---- Services ----------------------------------------------------------
 
+  // Registered first because everything below asks for it. The ambient set in
+  // `core/services` names this token rather than the framework's `Log`, so a
+  // feature gets the filtered logger without knowing there is a filter.
+  module.services.singleton(AppLog, {
+    inject: { logger: Log, config: Settings.token },
+    create: ({ logger, config }) => filtered(logger, () => config.read().get(CONFIG.LOG_LEVEL)),
+  });
+
   module.services.singleton(Registry, {
     inject: { config: Settings.token, editorConfig: EditorSettings.token, l10n: Localization },
     create: ({ config, editorConfig, l10n }) =>
@@ -160,7 +169,7 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
   });
 
   module.services.singleton(History, {
-    inject: { storage: HistoryStorage.token, config: Settings.token, log: Log },
+    inject: { storage: HistoryStorage.token, config: Settings.token, log: AppLog },
     create: ({ storage, config, log }) =>
       new HistoryStore(storage, config, log.withFields({ feature: 'history' })),
   });
@@ -171,7 +180,7 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
   });
 
   module.services.singleton(Regex, {
-    inject: { log: Log },
+    inject: { log: AppLog },
     create: ({ log }) => new RegexClient(defaultWorkerPath(), log.withFields({ feature: 'regex' })),
   });
 
@@ -189,7 +198,7 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
   // the store and logger once here is what stops the three of them from
   // drifting into three slightly different loads.
   module.services.singleton(PresetReload, {
-    inject: { store: Presets, log: Log },
+    inject: { store: Presets, log: AppLog },
     create:
       ({ store, log }) =>
       (): Promise<void> =>
@@ -199,7 +208,7 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
   // A service rather than a tree-view local: the checkbox handler and the
   // reset command both drive the same provider.
   module.services.singleton(Tools, {
-    inject: { registry: Registry, favorites: Favorites, l10n: Localization, log: Log },
+    inject: { registry: Registry, favorites: Favorites, l10n: Localization, log: AppLog },
     create: ({ registry, favorites, l10n, log }) =>
       new ToolsTreeProvider(registry, favorites, l10n, log.withFields({ feature: 'tools' })),
   });
@@ -345,7 +354,7 @@ const quickUtils = defineModule('quickUtils', { uses }, (module): undefined => {
 
   module.hostedServices.add({
     id: 'quickUtils.favoritesCheckbox',
-    inject: { tools: Tools, log: Log },
+    inject: { tools: Tools, log: AppLog },
     start: (context, { tools, log }) => {
       const subscription = tools.onDidChangeCheckboxState((changes) => {
         void (async (): Promise<void> => {
diff --git a/test/integration/testHost.test.ts b/test/integration/testHost.test.ts
index 89a1144..daa9656 100644
--- a/test/integration/testHost.test.ts
+++ b/test/integration/testHost.test.ts
@@ -158,4 +158,27 @@ describe('the application, run on fakes', () => {
 
     expect(host.logs.at('error')).toEqual([]);
   });
+
+  // `quickUtils.logLevel` was declared, documented and localised for a while
+  // with nothing reading it, so this pair is about the wiring rather than the
+  // comparison — `HistoryStore` takes its logger from the injected token, and
+  // that is the seam where a filter is easy to forget.
+  it('logs at info by default', async () => {
+    await host.start();
+    host.notifications._respondWith(0); // confirm the clear, which is what logs
+    await host.commands.execute(COMMANDS.HISTORY_CLEAR);
+
+    expect(host.logs.at('info').map((entry) => entry.message)).toContain('History cleared');
+    await host.stop();
+  });
+
+  it('drops an info entry once logLevel is raised to warn', async () => {
+    host.settings._set('quickUtils', 'logLevel', 'globalValue', 'warn');
+    await host.start();
+    host.notifications._respondWith(0);
+    await host.commands.execute(COMMANDS.HISTORY_CLEAR);
+
+    expect(host.logs.at('info').map((entry) => entry.message)).not.toContain('History cleared');
+    await host.stop();
+  });
 });
diff --git a/test/unit/logging.test.ts b/test/unit/logging.test.ts
new file mode 100644
index 0000000..d00b4ce
--- /dev/null
+++ b/test/unit/logging.test.ts
@@ -0,0 +1,120 @@
+/**
+ * The `quickUtils.logLevel` floor.
+ *
+ * Two things are worth pinning here rather than trusting by inspection: that
+ * every level is compared against the floor (an off-by-one in the table shows
+ * up as one level leaking), and that the level is read *per call*. The second
+ * is the reason this wrapper takes a thunk — the services that hold a logger
+ * are singletons built once at activation, so capturing the level would make
+ * the setting take effect only after a reload.
+ */
+
+import { describe, expect, it } from 'vitest';
+
+import type { LogFields, Logger } from '@kkdev92/vscode-ext-kit';
+
+import { filtered, type LogLevel } from '../../src/core/logging';
+
+interface Recorded {
+  readonly level: string;
+  readonly message: string;
+  readonly fields?: LogFields | undefined;
+}
+
+/** A logger that records instead of writing, with `withFields` kept faithful. */
+function recorder(entries: Recorded[], inherited?: LogFields): Logger {
+  const merged = (fields?: LogFields): LogFields | undefined =>
+    inherited === undefined && fields === undefined ? undefined : { ...inherited, ...fields };
+  return {
+    trace: (message, fields): void => {
+      entries.push({ level: 'trace', message, fields: merged(fields) });
+    },
+    debug: (message, fields): void => {
+      entries.push({ level: 'debug', message, fields: merged(fields) });
+    },
+    info: (message, fields): void => {
+      entries.push({ level: 'info', message, fields: merged(fields) });
+    },
+    warn: (message, fields): void => {
+      entries.push({ level: 'warn', message, fields: merged(fields) });
+    },
+    error: (message, _error, fields): void => {
+      entries.push({ level: 'error', message, fields: merged(fields) });
+    },
+    withFields: (fields): Logger => recorder(entries, { ...inherited, ...fields }),
+  };
+}
+
+/** Logs one entry at every level and returns the levels that got through. */
+function levelsThatPass(level: LogLevel): string[] {
+  const entries: Recorded[] = [];
+  const log = filtered(recorder(entries), () => level);
+  log.trace('t');
+  log.debug('d');
+  log.info('i');
+  log.warn('w');
+  log.error('e');
+  return entries.map((entry) => entry.level);
+}
+
+describe('the logLevel floor', () => {
+  it('lets everything through at trace', () => {
+    expect(levelsThatPass('trace')).toEqual(['trace', 'debug', 'info', 'warn', 'error']);
+  });
+
+  it('drops only what is below the floor', () => {
+    expect(levelsThatPass('debug')).toEqual(['debug', 'info', 'warn', 'error']);
+    expect(levelsThatPass('info')).toEqual(['info', 'warn', 'error']);
+    expect(levelsThatPass('warn')).toEqual(['warn', 'error']);
+  });
+
+  it('keeps errors at the highest floor', () => {
+    expect(levelsThatPass('error')).toEqual(['error']);
+  });
+
+  it('re-reads the level on every call, so a settings change applies at once', () => {
+    const entries: Recorded[] = [];
+    let level: LogLevel = 'info';
+    const log = filtered(recorder(entries), () => level);
+
+    log.debug('before');
+    level = 'debug';
+    log.debug('after');
+
+    expect(entries.map((entry) => entry.message)).toEqual(['after']);
+  });
+
+  it('keeps the floor on a scoped child, and its fields', () => {
+    const entries: Recorded[] = [];
+    const log = filtered(recorder(entries), () => 'warn').withFields({ feature: 'history' });
+
+    log.info('dropped');
+    log.warn('kept');
+
+    expect(entries).toEqual([{ level: 'warn', message: 'kept', fields: { feature: 'history' } }]);
+  });
+
+  it('passes the error argument through', () => {
+    const seen: unknown[] = [];
+    const log = filtered(
+      {
+        trace: (): void => {},
+        debug: (): void => {},
+        info: (): void => {},
+        warn: (): void => {},
+        error: (_message, error): void => {
+          seen.push(error);
+        },
+        withFields: function (this: Logger): Logger {
+          return this;
+        },
+      },
+      () => 'trace'
+    );
+    const boom = new Error('boom');
+
+    log.error('failed', boom);
+
+    expect(seen).toEqual([boom]);
+  });
+});