diff --git a/src/defaultSkills/applet.SKILL b/src/defaultSkills/applet.SKILL
index 82d316b..9dbf291 100644
--- a/src/defaultSkills/applet.SKILL
+++ b/src/defaultSkills/applet.SKILL
@@ -48,7 +48,7 @@ Applets run in an isolated worker thread pool sandbox.
 - **No `require()` or `import`**: Attempting to import modules throws an error.
 - **Pre-injected Globals**:
   - `fetch(path, options)`: Authenticated `fetch` pre-configured with a JWT scoped to the current user and selected company. Use root-relative API routes, e.g. `fetch('/article/42000009')`.
-  - `fs` / `vfs`: Sandboxed VFS filesystem interface for reading/writing local company files.
+  - `fs`: Sandboxed filesystem interface for reading/writing local company files.
   - `ExcelJS`: Pre-injected spreadsheet library.
   - `PDFDocument`: Pre-injected PDFKit library.
   - `sharp`: Pre-injected image manipulation library.
diff --git a/src/tools/javascript-worker.js b/src/tools/javascript-worker.js
index 3c74c64..6572df9 100644
--- a/src/tools/javascript-worker.js
+++ b/src/tools/javascript-worker.js
@@ -600,7 +600,6 @@ async function runJob(job) {
         sandbox: {
             console: sandboxConsole,
             fs: vfs,
-            vfs,
             sharp: bridgeSharp(vfs),
             ExcelJS: bridgedExcel,
             exceljs: bridgedExcel,
diff --git a/src/tools/prompts.js b/src/tools/prompts.js
index 738cf3d..3d2cb0b 100644
--- a/src/tools/prompts.js
+++ b/src/tools/prompts.js
@@ -49,7 +49,7 @@ export const TOOL_DESCRIPTIONS = {
     javascript_execute:
         'Execute JS in an isolated sandbox via inline `code` (assign to `module.exports`) or `appletvfsfile` ' +
         '(.applet.js returning typed CSV per @applet-input-schema, @applet-output-schema, and @applet-description; details in applet.SKILL). ' +
-        'Pre-injected globals: fs (vfs; use only root-relative paths for all file operations, absolute paths will fail), sharp, ExcelJS, PDFDocument, crypto, and fetch("/path"). No require/import.',
+        'Pre-injected globals: fs (use only root-relative paths for all file operations, absolute paths will fail), sharp, ExcelJS, PDFDocument, crypto, and fetch("/path"). No require/import.',
 
     find_files:
         'List VFS files (root-relative paths). Set skills=true to list root-level "<slug>.SKILL" files.',
diff --git a/src/tools/vfs.js b/src/tools/vfs.js
index ea137e0..be7caa6 100644
--- a/src/tools/vfs.js
+++ b/src/tools/vfs.js
@@ -435,6 +435,193 @@ export function createVfs(vfsRoot, options = {}) {
                 throw sanitizeFsError(err, p);
             }
         },
+
+        appendFile: (p, data, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                vfs.appendFileSync(p, data, options);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
+        copyFileSync: (src, dest, mode) => {
+            assertNotReadOnlyDatabasePath(dest);
+            const hash = extractFullHash(src);
+            if (hash) {
+                const buf = syncFetchImage(hash);
+                if (buf) {
+                    const destDisk = safeResolve(dest);
+                    fs.mkdirSync(path.dirname(destDisk), { recursive: true });
+                    if (typeof mode === 'number' && (mode & fs.constants.COPYFILE_EXCL) && fs.existsSync(destDisk)) {
+                        const err = new Error(`EEXIST: file already exists, copyfile '${src}' -> '${dest}'`);
+                        err.code = 'EEXIST';
+                        err.path = dest;
+                        err.syscall = 'copyfile';
+                        throw err;
+                    }
+                    try {
+                        return fs.writeFileSync(destDisk, buf);
+                    } catch (err) {
+                        throw sanitizeFsError(err, dest);
+                    }
+                }
+            }
+            const srcDisk = safeResolve(src);
+            const destDisk = safeResolve(dest);
+            fs.mkdirSync(path.dirname(destDisk), { recursive: true });
+            try {
+                return fs.copyFileSync(srcDisk, destDisk, mode);
+            } catch (err) {
+                throw sanitizeFsError(err, `${src} -> ${dest}`);
+            }
+        },
+
+        copyFile: (src, dest, mode, cb) => {
+            const callback = typeof mode === 'function' ? mode : cb;
+            const m = typeof mode === 'function' ? undefined : mode;
+            try {
+                vfs.copyFileSync(src, dest, m);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
+        cpSync: (src, dest, opt) => {
+            assertNotReadOnlyDatabasePath(dest);
+            const srcDisk = safeResolve(src);
+            const destDisk = safeResolve(dest);
+            fs.mkdirSync(path.dirname(destDisk), { recursive: true });
+            try {
+                return fs.cpSync(srcDisk, destDisk, opt);
+            } catch (err) {
+                throw sanitizeFsError(err, `${src} -> ${dest}`);
+            }
+        },
+
+        cp: (src, dest, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                vfs.cpSync(src, dest, options);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
+        renameSync: (oldPath, newPath) => {
+            assertNotReadOnlyDatabasePath(oldPath);
+            assertNotReadOnlyDatabasePath(newPath);
+            const oldDisk = safeResolve(oldPath);
+            const newDisk = safeResolve(newPath);
+            fs.mkdirSync(path.dirname(newDisk), { recursive: true });
+            try {
+                return fs.renameSync(oldDisk, newDisk);
+            } catch (err) {
+                throw sanitizeFsError(err, `${oldPath} -> ${newPath}`);
+            }
+        },
+
+        rename: (oldPath, newPath, cb) => {
+            try {
+                vfs.renameSync(oldPath, newPath);
+                if (typeof cb === 'function') process.nextTick(cb, null);
+            } catch (err) {
+                if (typeof cb === 'function') process.nextTick(cb, err);
+                else throw err;
+            }
+        },
+
+        truncateSync: (p, len) => {
+            assertNotReadOnlyDatabasePath(p);
+            const diskPath = safeResolve(p);
+            try {
+                return fs.truncateSync(diskPath, len);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        truncate: (p, len, cb) => {
+            const callback = typeof len === 'function' ? len : cb;
+            const l = typeof len === 'function' ? undefined : len;
+            try {
+                vfs.truncateSync(p, l);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
+        accessSync: (p, mode) => {
+            const hash = extractFullHash(p);
+            if (hash) {
+                const buf = syncFetchImage(hash);
+                if (buf) {
+                    if (typeof mode === 'number' && (mode & fs.constants.W_OK)) {
+                        const err = new Error(`EACCES: permission denied, access '${p}'`);
+                        err.code = 'EACCES';
+                        err.path = p;
+                        err.syscall = 'access';
+                        throw err;
+                    }
+                    return;
+                }
+            }
+            const diskPath = safeResolve(p);
+            try {
+                return fs.accessSync(diskPath, mode);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        access: (p, mode, cb) => {
+            const callback = typeof mode === 'function' ? mode : cb;
+            const m = typeof mode === 'function' ? undefined : mode;
+            try {
+                vfs.accessSync(p, m);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
+        realpathSync: (p, opt) => {
+            const diskPath = safeResolve(p);
+            try {
+                const resolved = fs.realpathSync(diskPath, opt);
+                const rel = path.relative(vfsRoot, resolved);
+                if (rel.startsWith('..') || path.isAbsolute(rel)) {
+                    throw new Error(`Access denied: path "${p}" escapes virtual filesystem boundary.`);
+                }
+                return rel ? rel.split(path.sep).join('/') : '.';
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        realpath: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                const res = vfs.realpathSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null, res);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
         existsSync: (p) => {
             const hash = extractFullHash(p);
             if (hash) {
@@ -449,6 +636,11 @@ export function createVfs(vfsRoot, options = {}) {
             }
         },
 
+        exists: (p, cb) => {
+            const res = vfs.existsSync(p);
+            if (typeof cb === 'function') process.nextTick(cb, res);
+        },
+
         statSync: (p, opt) => {
             const hash = extractFullHash(p);
             if (hash) {
@@ -466,18 +658,63 @@ export function createVfs(vfsRoot, options = {}) {
                 }
             }
             const diskPath = safeResolve(p);
-            return fs.statSync(diskPath, opt);
+            try {
+                return fs.statSync(diskPath, opt);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        stat: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                const res = vfs.statSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null, res);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
         },
 
         lstatSync: (p, opt) => vfs.statSync(p, opt),
 
+        lstat: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                const res = vfs.lstatSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null, res);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
         readdirSync: (p = '.', opt) => {
             const clean = typeof p === 'string' ? p.trim().replace(/^([a-zA-Z]:|\/)+/, '') : '';
             if (VIRTUAL_IMAGE_FOLDERS.has(clean.toLowerCase())) {
                 return [];
             }
             const diskPath = safeResolve(p);
-            return fs.readdirSync(diskPath, opt);
+            try {
+                return fs.readdirSync(diskPath, opt);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        readdir: (p = '.', opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : (typeof p === 'function' ? p : cb);
+            const options = typeof opt === 'function' ? undefined : opt;
+            const pathArg = typeof p === 'function' ? '.' : p;
+            try {
+                const res = vfs.readdirSync(pathArg, options);
+                if (typeof callback === 'function') process.nextTick(callback, null, res);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
         },
 
         mkdirSync: (p, opt) => {
@@ -489,22 +726,81 @@ export function createVfs(vfsRoot, options = {}) {
                 throw sanitizeFsError(err, p);
             }
         },
+
+        mkdir: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                const res = vfs.mkdirSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null, res);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
+        },
+
         unlinkSync: (p) => {
             assertNotReadOnlyDatabasePath(p);
             const diskPath = safeResolve(p);
-            return fs.unlinkSync(diskPath);
+            try {
+                return fs.unlinkSync(diskPath);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        unlink: (p, cb) => {
+            try {
+                vfs.unlinkSync(p);
+                if (typeof cb === 'function') process.nextTick(cb, null);
+            } catch (err) {
+                if (typeof cb === 'function') process.nextTick(cb, err);
+                else throw err;
+            }
         },
 
         rmdirSync: (p, opt) => {
             assertNotReadOnlyDatabasePath(p);
             const diskPath = safeResolve(p);
-            return fs.rmdirSync(diskPath, opt);
+            try {
+                return fs.rmdirSync(diskPath, opt);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        rmdir: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                vfs.rmdirSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
         },
 
         rmSync: (p, opt) => {
             assertNotReadOnlyDatabasePath(p);
             const diskPath = safeResolve(p);
-            return fs.rmSync(diskPath, opt);
+            try {
+                return fs.rmSync(diskPath, opt);
+            } catch (err) {
+                throw sanitizeFsError(err, p);
+            }
+        },
+
+        rm: (p, opt, cb) => {
+            const callback = typeof opt === 'function' ? opt : cb;
+            const options = typeof opt === 'function' ? undefined : opt;
+            try {
+                vfs.rmSync(p, options);
+                if (typeof callback === 'function') process.nextTick(callback, null);
+            } catch (err) {
+                if (typeof callback === 'function') process.nextTick(callback, err);
+                else throw err;
+            }
         },
 
         promises: {
@@ -538,11 +834,41 @@ export function createVfs(vfsRoot, options = {}) {
             },
             writeFile: async (p, data, opt) => vfs.writeFileSync(p, data, opt),
             appendFile: async (p, data, opt) => vfs.appendFileSync(p, data, opt),
+            copyFile: async (src, dest, mode) => {
+                assertNotReadOnlyDatabasePath(dest);
+                const hash = extractFullHash(src);
+                if (hash) {
+                    const buf = await vfs.promises.readFile(src);
+                    const destDisk = safeResolve(dest);
+                    fs.mkdirSync(path.dirname(destDisk), { recursive: true });
+                    if (typeof mode === 'number' && (mode & fs.constants.COPYFILE_EXCL) && fs.existsSync(destDisk)) {
+                        const err = new Error(`EEXIST: file already exists, copyfile '${src}' -> '${dest}'`);
+                        err.code = 'EEXIST';
+                        err.path = dest;
+                        err.syscall = 'copyfile';
+                        throw err;
+                    }
+                    try {
+                        return fs.writeFileSync(destDisk, buf);
+                    } catch (err) {
+                        throw sanitizeFsError(err, dest);
+                    }
+                }
+                return vfs.copyFileSync(src, dest, mode);
+            },
+            cp: async (src, dest, opt) => vfs.cpSync(src, dest, opt),
+            rename: async (oldPath, newPath) => vfs.renameSync(oldPath, newPath),
+            truncate: async (p, len) => vfs.truncateSync(p, len),
+            access: async (p, mode) => vfs.accessSync(p, mode),
+            realpath: async (p, opt) => vfs.realpathSync(p, opt),
             stat: async (p, opt) => vfs.statSync(p, opt),
+            lstat: async (p, opt) => vfs.lstatSync(p, opt),
             readdir: async (p, opt) => vfs.readdirSync(p, opt),
-  mkdir: async (p, opt) => vfs.mkdirSync(p, opt),
+            mkdir: async (p, opt) => vfs.mkdirSync(p, opt),
+            rmdir: async (p, opt) => vfs.rmdirSync(p, opt),
             unlink: async (p) => vfs.unlinkSync(p),
-     rm: async (p, opt) => vfs.rmSync(p, opt),
+            rm: async (p, opt) => vfs.rmSync(p, opt),
+            constants: fs.constants,
         },
 
         /**
@@ -573,5 +899,10 @@ export function createVfs(vfsRoot, options = {}) {
         sanitizeError: (err, virtualPath) => sanitizeFsError(err, virtualPath),
     };
 
+    vfs.realpathSync.native = (p, opt) => vfs.realpathSync(p, opt);
+    vfs.realpath.native = (p, opt, cb) => vfs.realpath(p, opt, cb);
+    vfs.promises.realpath.native = async (p, opt) => vfs.realpathSync(p, opt);
+    vfs.constants = fs.constants;
+
     return vfs;
 }