diff --git a/packages/debug/index.d.ts b/packages/debug/index.d.ts
new file mode 100644
index 000000000..c3ec00bd1
--- /dev/null
+++ b/packages/debug/index.d.ts
@@ -0,0 +1,3 @@
+import initDebug = require('./lib/debug');
+
+export = initDebug;
diff --git a/packages/debug/lib/debug.d.ts b/packages/debug/lib/debug.d.ts
new file mode 100644
index 000000000..f2bee3de1
--- /dev/null
+++ b/packages/debug/lib/debug.d.ts
@@ -0,0 +1,58 @@
+/**
+ * A debug logger function, as returned by the `debug` package.
+ */
+interface Debugger {
+    (formatter: unknown, ...args: unknown[]): void;
+    enabled: boolean;
+    namespace: string;
+    /**
+     * The selected colour for this namespace. A string in the browser build,
+     * a numeric ANSI code under Node (as returned by `selectColor()`).
+     */
+    color: string | number;
+    log: (...args: unknown[]) => void;
+    destroy(): boolean;
+    extend(namespace: string, delimiter?: string): Debugger;
+}
+
+/**
+ * A map of custom `%`-formatters registered on the `debug` module.
+ */
+interface Formatters {
+    [formatter: string]: (value: unknown) => string;
+}
+
+/**
+ * The underlying `debug` module.
+ */
+interface DebugModule {
+    (namespace: string): Debugger;
+    enable(namespaces: string): void;
+    disable(): string;
+    enabled(namespace: string): boolean;
+    /** Custom formatters, keyed by the format letter (e.g. `debug.formatters.h`). */
+    formatters: Formatters;
+    names: RegExp[];
+    skips: RegExp[];
+}
+
+/**
+ * Create a debug instance based on your package.json alias/name.
+ *
+ * The challenge here is to figure out where your package.json exists.
+ */
+interface InitDebug {
+    /**
+     * @param name - Name of the debug unit.
+     */
+    (name: string): Debugger;
+
+    /**
+     * The underlying `debug` module.
+     */
+    _base: DebugModule;
+}
+
+declare const initDebug: InitDebug;
+
+export = initDebug;
diff --git a/packages/debug/package.json b/packages/debug/package.json
index 921871393..a9e238814 100644
--- a/packages/debug/package.json
+++ b/packages/debug/package.json
@@ -10,9 +10,11 @@
   },
   "files": [
     "index.js",
+    "index.d.ts",
     "lib"
   ],
   "main": "index.js",
+  "types": "index.d.ts",
   "publishConfig": {
     "access": "public"
   },
diff --git a/packages/logging/index.d.ts b/packages/logging/index.d.ts
new file mode 100644
index 000000000..ac24e058d
--- /dev/null
+++ b/packages/logging/index.d.ts
@@ -0,0 +1,3 @@
+import logging = require('./lib/logging');
+
+export = logging;
diff --git a/packages/logging/lib/GhostLogger.d.ts b/packages/logging/lib/GhostLogger.d.ts
new file mode 100644
index 000000000..d820406c9
--- /dev/null
+++ b/packages/logging/lib/GhostLogger.d.ts
@@ -0,0 +1,140 @@
+type LogLevel = 'trace' | 'debug' | 'info' | 'warn' | 'error' | 'fatal';
+
+type Transport = 'stdout' | 'stderr' | 'parent' | 'file' | 'gelf' | 'http' | 'elasticsearch';
+
+interface RotationOptions {
+    enabled?: boolean;
+    period?: string;
+    count?: number;
+    /**
+     * Use the `@tryghost/bunyan-rotating-filestream` library instead of the
+     * built-in bunyan rotation.
+     */
+    useLibrary?: boolean;
+    threshold?: string | number;
+    gzip?: boolean;
+    rotateExisting?: boolean;
+}
+
+interface ElasticsearchOptions {
+    host?: string;
+    username?: string;
+    password?: string;
+    index?: string;
+    pipeline?: string;
+    level?: LogLevel;
+}
+
+interface GelfOptions {
+    host?: string;
+    port?: number;
+    options?: object;
+}
+
+interface HttpOptions {
+    url?: string;
+    headers?: Record<string, string>;
+    username?: string;
+    password?: string;
+    level?: LogLevel;
+}
+
+interface GhostLoggerOptions {
+    /** Name of the logger. Appears in raw log files as `{"name": ...}`. */
+    name?: string;
+    /** Used for creating the file name. */
+    domain?: string;
+    /** Used for creating the file name. */
+    env?: string;
+    /** Used to print short or long log. */
+    mode?: string;
+    /** The default level of all transports except stderr. */
+    level?: LogLevel;
+    /** Whether the body of a request should be logged to the target stream. */
+    logBody?: boolean;
+    /** Transports to log to (e.g. `stdout`, `stderr`, `gelf`, `file`). */
+    transports?: Transport[];
+    /** File rotation configuration. */
+    rotation?: RotationOptions;
+    /** Path where log files are stored. */
+    path?: string;
+    /**
+     * Optional filename template for log files. Supports `{env}` and `{domain}`
+     * placeholders. Defaults to `{domain}_{env}`.
+     */
+    filename?: string;
+    /** Elasticsearch transport configuration. */
+    elasticsearch?: ElasticsearchOptions;
+    /** Gelf transport configuration. */
+    gelf?: GelfOptions;
+    /** HTTP transport configuration. */
+    http?: HttpOptions;
+    /** Use local time instead of UTC. */
+    useLocalTime?: boolean;
+    /** Optional set of metadata to attach to each log line. */
+    metadata?: Record<string, unknown>;
+}
+
+/**
+ * Ghost's logger class.
+ *
+ * The logger handles any stdout/stderr logs and streams them into the
+ * configured transports.
+ */
+declare class GhostLogger {
+    name: string;
+    env: string;
+    domain: string;
+    transports: Transport[];
+    level: LogLevel;
+    logBody: boolean;
+    mode: string;
+    path: string;
+    filename: string;
+    elasticsearch: ElasticsearchOptions;
+    gelf: GelfOptions;
+    http: HttpOptions;
+    useLocalTime: boolean;
+    metadata: Record<string, unknown>;
+    rotation: RotationOptions;
+    streams: Record<string, { name: string; log: unknown }>;
+    serializers: Record<string, (input: any) => unknown>;
+
+    constructor(options?: GhostLoggerOptions);
+
+    /** Sanitize a domain for use in filenames. */
+    sanitizeDomain(domain: string): string;
+
+    /** Replace `{env}`/`{domain}` placeholders in a filename template. */
+    replaceFilenamePlaceholders(template: string): string;
+
+    /** Remove sensitive data (passwords, keys, cookies, ...) from an object. */
+    removeSensitiveData<T extends object>(obj: T): T;
+
+    /** Centralised log function. */
+    log(type: LogLevel, args: unknown[]): void;
+
+    trace(...args: unknown[]): void;
+    debug(...args: unknown[]): void;
+    info(...args: unknown[]): void;
+    warn(...args: unknown[]): void;
+    error(...args: unknown[]): void;
+    fatal(...args: unknown[]): void;
+
+    /** Create a child logger with some properties bound to every log message. */
+    child(boundProperties: Record<string, unknown>): GhostLogger;
+}
+
+declare namespace GhostLogger {
+    export {
+        LogLevel,
+        Transport,
+        RotationOptions,
+        ElasticsearchOptions,
+        GelfOptions,
+        HttpOptions,
+        GhostLoggerOptions,
+    };
+}
+
+export = GhostLogger;
diff --git a/packages/logging/lib/logging.d.ts b/packages/logging/lib/logging.d.ts
new file mode 100644
index 000000000..604066539
--- /dev/null
+++ b/packages/logging/lib/logging.d.ts
@@ -0,0 +1,21 @@
+import GhostLogger = require('./GhostLogger');
+
+/**
+ * A pre-configured `GhostLogger` instance (built from `loggingrc` if present),
+ * with the `GhostLogger` class attached for creating additional instances.
+ */
+declare const logging: GhostLogger & {
+    GhostLogger: typeof GhostLogger;
+};
+
+declare namespace logging {
+    export type LogLevel = GhostLogger.LogLevel;
+    export type Transport = GhostLogger.Transport;
+    export type RotationOptions = GhostLogger.RotationOptions;
+    export type ElasticsearchOptions = GhostLogger.ElasticsearchOptions;
+    export type GelfOptions = GhostLogger.GelfOptions;
+    export type HttpOptions = GhostLogger.HttpOptions;
+    export type GhostLoggerOptions = GhostLogger.GhostLoggerOptions;
+}
+
+export = logging;
diff --git a/packages/logging/package.json b/packages/logging/package.json
index 9d9c2f212..259cfd4ce 100644
--- a/packages/logging/package.json
+++ b/packages/logging/package.json
@@ -10,9 +10,11 @@
   },
   "files": [
     "index.js",
+    "index.d.ts",
     "lib"
   ],
   "main": "index.js",
+  "types": "index.d.ts",
   "publishConfig": {
     "access": "public"
   },
diff --git a/packages/pretty-stream/index.d.ts b/packages/pretty-stream/index.d.ts
new file mode 100644
index 000000000..9fa5d8e1e
--- /dev/null
+++ b/packages/pretty-stream/index.d.ts
@@ -0,0 +1,3 @@
+import PrettyStream = require('./lib/PrettyStream');
+
+export = PrettyStream;
diff --git a/packages/pretty-stream/lib/PrettyStream.d.ts b/packages/pretty-stream/lib/PrettyStream.d.ts
new file mode 100644
index 000000000..9b58bd322
--- /dev/null
+++ b/packages/pretty-stream/lib/PrettyStream.d.ts
@@ -0,0 +1,22 @@
+import { Transform, TransformOptions } from 'stream';
+
+interface PrettyStreamOptions extends TransformOptions {
+    /**
+     * Controls how much detail is printed. Use `'long'` to include the
+     * pretty-printed request/error body, anything else prints the short form.
+     * @default 'short'
+     */
+    mode?: string;
+}
+
+/**
+ * A Bunyan-compatible transform stream that turns raw JSON log records into
+ * human-readable, colourised output.
+ */
+declare class PrettyStream extends Transform {
+    mode: string;
+
+    constructor(options?: PrettyStreamOptions);
+}
+
+export = PrettyStream;
diff --git a/packages/pretty-stream/package.json b/packages/pretty-stream/package.json
index 0e9bdc90d..d37d62091 100644
--- a/packages/pretty-stream/package.json
+++ b/packages/pretty-stream/package.json
@@ -10,9 +10,11 @@
   },
   "files": [
     "index.js",
+    "index.d.ts",
     "lib"
   ],
   "main": "index.js",
+  "types": "index.d.ts",
   "publishConfig": {
     "access": "public"
   },