How do I debug a Vue production error without a browser debugger?

Atlas allows you to paste a production stack trace directly into the terminal. It uses its `read` tool to navigate your Vue project's files, `grep` to find error message origins, and `lsp` to trace function calls, all without needing a browser debugger attached.

Can Atlas understand my Vue single-file components and Composition API?

Yes, Atlas is built to understand Vue projects, including single-file components (`.vue` files) and the Composition API. It indexes your code by AST declarations using tree-sitter, ensuring accurate navigation and analysis of your Vue codebase.

What if my Vue stack trace is from an older build?

Atlas validates offsets against the current file. If a stack trace from an older build points to an incorrect line in your Vue component, Atlas will report an "Offset out of range" error, prompting you to re-read the file from the top before proceeding.

How does Atlas ensure safety when fixing Vue code?

Atlas operates with a read-only plan agent first, then asks for approval before switching to a build agent. All `edit` operations generate a unified diff for your review and approval before writing to your Vue project files. Edits are also snapshotted as git patches for easy rollback.

Can Atlas help me add tests for a Vue bug fix?

Yes, Atlas can assist in drafting and adding regression tests using `Vitest with Vue Test Utils` after a bug fix. This ensures that the identified Vue runtime bug cannot reoccur silently in your application.

Does Atlas integrate with my existing Vue toolchain like `pnpm` or `prettier`?

Atlas works direct within your existing Vue project setup. It respects your `package.json` and integrates with common tools like `pnpm` for package management and `prettier` for code formatting, ensuring consistency.

Trace a runtime bug from a stack trace in Vue with Atlas in 2026

Atlas empowers Vue developers in 2026 to trace runtime bugs from production stack traces directly to the responsible line of code and apply a fix, all without attaching a debugger. By leveraging Atlas's `read`, `grep`, and `lsp` tools, you can quickly navigate your Vue project, whether it uses single-file components or the Composition API, and then use `edit` to implement a solution, ensuring your `Vitest with Vue Test Utils` suite prevents recurrence.

How Atlas traces Vue runtime bugs from production stack traces

Atlas streamlines tracing Vue runtime bugs from production stack traces by consuming file:line pairs directly, a process that takes mere seconds. In 2026, Atlas's `read` tool precisely navigates your Vue project, validating offsets against current files to prevent misdirection from outdated builds, ensuring you always target the correct code within your `.vue` components or Composition API logic.

When a production Vue application throws an error, the resulting stack trace provides a list of `file:line` pairs. Atlas's `read` tool is designed to consume this exact format. You simply paste the stack trace into Atlas, and it will sequentially read each frame's file at the reported offset. This initial step is crucial for quickly pinpointing the exact location of the error within your Vue single-file components or Composition API setup. A key safety feature is Atlas's offset validation: if a trace originates from an older build, Atlas will loudly report that the offset is out of range for the current file, preventing you from wasting time debugging stale code. In such cases, Atlas prompts you to re-read the file from the top before trusting any line number, ensuring accuracy. This direct approach bypasses the need for a traditional debugger, allowing for rapid initial investigation of issues within your `src/components/` or `src/stores/` directories.

How Atlas uses `grep` and `lsp` for deeper Vue bug analysis

Beyond initial trace reading, Atlas employs its `grep` and `lsp` tools to provide a 360-degree view of Vue runtime bugs, often revealing the root cause within 5 minutes. After identifying the top frame, Atlas can `grep` for the error message string, frequently leading to the exact line where the error is constructed, which is often more informative than the initial crash site in a `src/views/` component.

Once Atlas has read the initial stack trace, the next step in diagnosing a Vue runtime bug involves deeper analysis using its specialized tools. The `grep` tool is invaluable for finding the origin of an error message. Instead of just looking at the top of the stack, which might be a generic error handler, `grep` can locate where the specific error string is generated. This often reveals the underlying condition or invalid data causing the problem within your Vuex store actions or Pinia mutations. Following this, Atlas's `lsp` tool, leveraging its understanding of your Vue project's AST declarations built with tree-sitter, can perform `findReferences` operations on the failing function. This allows you to see all callers that can reach the problematic code with bad input, whether they are in a `src/utils/` helper or a component's `<script setup>` block. This comprehensive view helps identify all potential entry points for the bug, crucial for robust fixes in complex Vue applications managed with `pnpm`.

How Atlas fixes Vue bugs and ensures code safety

Atlas facilitates fixing Vue runtime bugs and ensures code safety through a rigorous, permission-gated process, typically completing a fix and regression test within 10 minutes. Every Atlas tool call, including `edit`, is permission-gated against `allow`, `ask`, and `deny` rules, providing developers with full control over changes to their Vue project's `package.json` or `.vue` files.

After identifying the root cause of a Vue runtime bug, Atlas moves to the `edit` phase. Atlas drafts a plan in a read-only plan agent and asks for approval before switching to a build agent to implement the fix. This two-stage process ensures transparency and control. When Atlas proposes a change, it computes a unified diff for every file edit and surfaces it for approval before writing, allowing you to review every modification to your Vue components, Composition API logic, or utility functions. This includes changes to files like `src/components/MyComponent.vue` or `src/stores/user.js`. Furthermore, Atlas snapshots file changes as git patches, so edits can be easily diffed and rolled back if necessary. A critical part of the fix workflow is adding a regression test using `Vitest with Vue Test Utils`. Atlas can help draft these tests, ensuring the identified bug cannot recur silently. This commitment to safety and review, combined with its ability to read `git` branches and stage commits, makes Atlas a powerful and trustworthy partner for maintaining high-quality Vue applications formatted with `prettier`.

Step by step

01Paste the production Vue stack trace into Atlas and have Atlas `read` each frame's file at the reported offset.
02If Atlas `read` reports "Offset <n> is out of range for this file" for a Vue component or store, the trace came from a different build; re-read the file from the top before trusting any line number.
03Use Atlas's `grep` tool to search for the error message string within your Vue project, especially in `src/utils/` or `src/stores/` files, to find where it is constructed, which is usually more informative than the top frame.
04Employ Atlas's `lsp` tool's `findReferences` operation on the failing function within your Vue single-file component or Composition API logic to see which callers can reach it with the bad input.
05Fix the identified Vue bug using Atlas's `edit` tool, reviewing the unified diff for changes to `.vue` files or JavaScript modules, and then add a regression test with `Vitest with Vue Test Utils` to prevent the trace from recurring silently.

Frequently asked questions

How do I debug a Vue production error without a browser debugger?: Atlas allows you to paste a production stack trace directly into the terminal. It uses its `read` tool to navigate your Vue project's files, `grep` to find error message origins, and `lsp` to trace function calls, all without needing a browser debugger attached.
Can Atlas understand my Vue single-file components and Composition API?: Yes, Atlas is built to understand Vue projects, including single-file components (`.vue` files) and the Composition API. It indexes your code by AST declarations using tree-sitter, ensuring accurate navigation and analysis of your Vue codebase.
What if my Vue stack trace is from an older build?: Atlas validates offsets against the current file. If a stack trace from an older build points to an incorrect line in your Vue component, Atlas will report an "Offset out of range" error, prompting you to re-read the file from the top before proceeding.
How does Atlas ensure safety when fixing Vue code?: Atlas operates with a read-only plan agent first, then asks for approval before switching to a build agent. All `edit` operations generate a unified diff for your review and approval before writing to your Vue project files. Edits are also snapshotted as git patches for easy rollback.
Can Atlas help me add tests for a Vue bug fix?: Yes, Atlas can assist in drafting and adding regression tests using `Vitest with Vue Test Utils` after a bug fix. This ensures that the identified Vue runtime bug cannot reoccur silently in your application.
Does Atlas integrate with my existing Vue toolchain like `pnpm` or `prettier`?: Atlas works direct within your existing Vue project setup. It respects your `package.json` and integrates with common tools like `pnpm` for package management and `prettier` for code formatting, ensuring consistency.

Try Atlas in your terminal

The terminal-native AI coding agent. Free core, single binary.

Install Atlas

Related guides

Trace a Runtime Bug from a Stack Trace with Atlas in 2026

How to trace a runtime bug from a stack trace with Atlas in 2026: read each frame at its offset, grep for the error string, and use the lsp tool to find callers.

Diagnose a Hanging or Long-Running Command in Vue with Atlas in 2026

For Vue developers in 2026, Atlas helps diagnose hanging or long-running `pnpm` scripts or `Vitest` tests. Quickly identify if a command is slow or blocked on input, and get it unstuck.

Write unit tests for untested code in Vue with Atlas in 2026

Add real unit tests to your untested Vue components in 2026 using Atlas. Leverage Vitest with Vue Test Utils, pnpm, and prettier to match existing repo conventions.

Run the Vitest Test Suite and Triage Failures in Vue with Atlas in 2026

In 2026, Vue developers use Atlas to efficiently triage Vitest test failures. Turn a wall of red output into a prioritized list of distinct root causes, leveraging pnpm and Vue Test Utils.

Debug a single failing test in Vue with Atlas in 2026

Pinpoint and fix failing Vue.js tests using Atlas, the terminal-native AI agent. Leverage Vitest with Vue Test Utils, pnpm, and real Vue idioms for efficient debugging in 2026.

Upgrade a Dependency and Fix Breakage in Vue with Atlas in 2026

Effortlessly upgrade Vue dependencies and resolve compile and test failures with Atlas in 2026. Leverage pnpm, Vitest with Vue Test Utils, and real-time compiler feedback.

Rename a symbol across the repo in Vue with Atlas in 2026

Effortlessly rename functions, classes, or constants across your Vue 3 codebase in 2026 using Atlas. Leverage lsp, grep, and edit for precise, safe refactoring in single-file components and Composition API projects.

Research a Third-Party API Before Integrating It in Vue With Atlas (2026)

Get an external API's real shape into context before writing a Vue integration. Atlas uses websearch and webfetch behind explicit permissions, then tests with Vitest.

Browse this resource hub