diff --git a/packages/aws/index.ts b/packages/aws/index.ts
index cf43297..0a9e1c9 100644
--- a/packages/aws/index.ts
+++ b/packages/aws/index.ts
@@ -24,11 +24,11 @@ class AWSSourceModule extends SourceModule {
   get originalKeyInfos(): KeyInfo[] {
     return [
       {
-        name: 'AWS_ACCESS_KEY_ID',
+        name: prefix(this.options.prefix, 'AWS_ACCESS_KEY_ID'),
         value: this.options.key,
       },
       {
-        name: 'AWS_SECRET_ACCESS_KEY',
+        name: prefix(this.options.prefix, 'AWS_SECRET_ACCESS_KEY'),
         value: this.options.secretKey,
       },
     ];
@@ -49,6 +49,10 @@ class AWSSourceModule extends SourceModule {
       })
     );
 
+    // Why the hell do I have to arbitrarily wait?
+    // What is propagating on Amazon's backend that results in the token not being immediately usable?
+    await new Promise((resolve) => setTimeout(resolve, 7000));
+
     this.accessKey = AccessKey;
 
     return [
diff --git a/packages/core/@types/source-module.ts b/packages/core/@types/source-module.ts
index 089da2d..008ca42 100644
--- a/packages/core/@types/source-module.ts
+++ b/packages/core/@types/source-module.ts
@@ -42,7 +42,7 @@ export abstract class SourceModule {
       await Promise.all(
         this.options.targets.map(async (target) => {
           Logger.silly(`(${target.name}) Reverting...`);
-          await target.revert(this.originalKeyInfos);
+          await target.target(this.originalKeyInfos);
           Logger.silly(`(${target.name}) Successfully reverted!`);
         })
       );
diff --git a/packages/core/@types/target-module.ts b/packages/core/@types/target-module.ts
index 856abc9..102b223 100644
--- a/packages/core/@types/target-module.ts
+++ b/packages/core/@types/target-module.ts
@@ -4,5 +4,4 @@ export interface ITargetModule {
   get name(): string;
 
   target(keyInfos: KeyInfo[]): Promise<void>;
-  revert(keyInfos: KeyInfo[]): Promise<void>;
 }
diff --git a/packages/core/fs/index.ts b/packages/core/fs/index.ts
new file mode 100644
index 0000000..592009f
--- /dev/null
+++ b/packages/core/fs/index.ts
@@ -0,0 +1,7 @@
+import { FSSourceModule } from './source';
+import { FSTargetModule } from './target';
+
+export const FS = {
+  Source: FSSourceModule,
+  Target: FSTargetModule,
+};
diff --git a/packages/core/fs/source.ts b/packages/core/fs/source.ts
new file mode 100644
index 0000000..c5a2190
--- /dev/null
+++ b/packages/core/fs/source.ts
@@ -0,0 +1,42 @@
+import path from 'node:path';
+import { SourceModule, KeyInfo } from '../@types';
+import { read, readSync } from './utils/dotenv';
+
+export class FSSourceModule extends SourceModule {
+  protected declare options: FSSourceModule.Options;
+  private keyInfos: KeyInfo[];
+
+  constructor({ targets, file, ...options }: FSSourceModule.Options) {
+    super({ targets });
+
+    this.options = {
+      ...this.options,
+      ...options,
+      file: path.join(process.cwd(), file),
+    };
+
+    this.keyInfos = readSync(this.options.file);
+  }
+
+  get name(): string {
+    return 'fs';
+  }
+
+  get originalKeyInfos(): KeyInfo[] {
+    return this.keyInfos;
+  }
+
+  async source(): Promise<KeyInfo[]> {
+    return await read(this.options.file);
+  }
+
+  async revert(): Promise<void> {}
+
+  async cleanup(): Promise<void> {}
+}
+
+namespace FSSourceModule {
+  export type Options = {
+    file: string;
+  } & SourceModule.Options;
+}
diff --git a/packages/core/fs/target.ts b/packages/core/fs/target.ts
new file mode 100644
index 0000000..32272e3
--- /dev/null
+++ b/packages/core/fs/target.ts
@@ -0,0 +1,28 @@
+import { ITargetModule, KeyInfo } from '../@types';
+import path from 'node:path';
+import { merge } from './utils/dotenv';
+
+export class FSTargetModule implements ITargetModule {
+  private options: FSTargetModule.Options;
+
+  constructor({ file, ...options }: FSTargetModule.Options) {
+    this.options = {
+      ...options,
+      file: path.join(process.cwd(), file),
+    };
+  }
+
+  get name(): string {
+    return 'fs';
+  }
+
+  async target(keyInfos: KeyInfo[]): Promise<void> {
+    return await merge(this.options.file, keyInfos);
+  }
+}
+
+export namespace FSTargetModule {
+  export interface Options {
+    file: string;
+  }
+}
diff --git a/packages/core/fs/utils/dotenv.ts b/packages/core/fs/utils/dotenv.ts
new file mode 100644
index 0000000..3c388cc
--- /dev/null
+++ b/packages/core/fs/utils/dotenv.ts
@@ -0,0 +1,39 @@
+import { KeyInfo } from '../..';
+import * as fs from 'node:fs/promises';
+import { readFileSync } from 'node:fs';
+import { keyInfoToKeyValue, keyValueToKeyInfo } from './keyinfo';
+
+export async function read(path: string): Promise<KeyInfo[]> {
+  const content = await fs.readFile(path, {
+    encoding: 'utf-8',
+  });
+
+  return content.split(/\r?\n/).filter(Boolean).map<KeyInfo>(keyValueToKeyInfo);
+}
+
+export function readSync(path: string): KeyInfo[] {
+  const content = readFileSync(path, {
+    encoding: 'utf-8',
+  });
+
+  return content.split(/\r?\n/).filter(Boolean).map<KeyInfo>(keyValueToKeyInfo);
+}
+
+export async function write(path: string, keyInfos: KeyInfo[]): Promise<void> {
+  await fs.writeFile(path, keyInfos.map(keyInfoToKeyValue).join('\n'), {
+    encoding: 'utf-8',
+  });
+}
+
+export async function merge(path: string, keyInfos: KeyInfo[]): Promise<void> {
+  const existingKeyInfos = await read(path);
+  const mergedKeyInfos: KeyInfo[] = [...keyInfos];
+
+  for (const existingKeyInfo of existingKeyInfos) {
+    if (mergedKeyInfos.find((keyInfo) => keyInfo.name === existingKeyInfo.name)) continue;
+
+    mergedKeyInfos.push(existingKeyInfo);
+  }
+
+  await write(path, mergedKeyInfos);
+}
diff --git a/packages/core/fs/utils/keyinfo.ts b/packages/core/fs/utils/keyinfo.ts
new file mode 100644
index 0000000..e7e204d
--- /dev/null
+++ b/packages/core/fs/utils/keyinfo.ts
@@ -0,0 +1,14 @@
+import { KeyInfo } from '../../@types/key-info';
+
+export function keyInfoToKeyValue(keyInfo: KeyInfo): string {
+  return `${keyInfo.name}=${keyInfo.value}`;
+}
+
+export function keyValueToKeyInfo(keyValue: string): KeyInfo {
+  const [name, value] = keyValue.split('=');
+
+  return {
+    name,
+    value,
+  };
+}
diff --git a/packages/core/index.ts b/packages/core/index.ts
index d0af2ec..5d9a940 100644
--- a/packages/core/index.ts
+++ b/packages/core/index.ts
@@ -37,4 +37,5 @@ export function prefix(...values: string[]): string {
 }
 
 export * from './@types';
+export * from './fs';
 export { LogLevel, Logger };
diff --git a/packages/github/index.ts b/packages/github/index.ts
index 8f9cb05..8ab3c53 100644
--- a/packages/github/index.ts
+++ b/packages/github/index.ts
@@ -25,7 +25,7 @@ class GitHubTargetModule implements ITargetModule {
   }
 
   get name(): string {
-    return 'github';
+    return `github:${this.options.org}`;
   }
 
   private async getOrgPublicKey(org: string): Promise<{ key_id: string; key: string }> {