How does Atlas run only one specific Vitest test in my Vue project?

Atlas uses the bash tool to execute pnpm test --filter , leveraging Vitest's built-in filtering to run only the specified test in your Vue application.

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

Yes, Atlas indexes code by AST declarations using tree-sitter, allowing it to deeply understand Vue's Composition API, single-file components (.vue files), and related structures like Pinia stores.

What if I need to add a console.log to a Vue component for debugging?

Atlas can use its edit tool to insert console.log statements directly into the block of your Vue component file, just as you would manually.

How does Atlas ensure I review its proposed fixes to my Vue code?

Atlas computes a unified diff for every proposed file edit and surfaces it for your explicit approval before writing any changes to your Vue project's files.

Does Atlas support pnpm for package management in Vue projects?

Yes, Atlas is designed to work direct with pnpm as the package manager for your Vue projects, executing commands like pnpm test through its bash tool.

Can Atlas help me fix a bug in a Vuex or Pinia store?

Absolutely. Atlas can navigate through your Vuex or Pinia store files (e.g., src/stores/myStore.ts) using lsp and apply fixes with edit or apply_patch, just like any other Vue-related code.

What if a fix requires changes across multiple Vue files?

For changes spanning several hunks or multiple Vue files, Atlas can use the apply_patch tool to compute and apply a unified diff, ensuring all related changes are handled cohesively.

Debug a single failing test in Vue with Atlas in 2026

In 2026, Vue developers use Atlas to efficiently debug a single failing test by leveraging its deep understanding of the Vue ecosystem, including Vitest with Vue Test Utils and pnpm. Atlas runs the specific test in isolation, analyzes the call graph, and proposes precise code fixes, ensuring your Vue application remains robust.

How Atlas runs a single failing Vitest test in Vue

Atlas, the terminal-native AI coding agent, runs a single failing Vitest test in your Vue project by executing pnpm test --filter in a bash shell. This focused approach, available in 2026, ensures minimal output, allowing the agent to quickly identify the relevant assertion and code under test.

When a Vue developer needs to debug a specific failing test, Atlas initiates a bash session to run Vitest with Vue Test Utils. Instead of running the entire test suite, Atlas uses pnpm test --filter <test-name-regex> to isolate the problematic test file or even a specific test within a file, such as src/components/MyComponent.test.ts. This mirrors how a human developer would use Vitest's built-in filtering capabilities. Atlas then reads the output, focusing on the assertion failure message and the stack trace. This initial step is crucial because it provides a clear, concise context for the subsequent debugging process, preventing information overload and ensuring the agent focuses on the exact problem within the Vue codebase. Atlas's ability to execute real shell commands means it interacts with your Vue project's package.json scripts exactly as you would.

How Atlas navigates Vue component code and test files

Atlas navigates Vue component code and Vitest test files using its lsp tool, which leverages AST declarations from tree-sitter for precise code understanding. In 2026, this allows Atlas to trace call graphs from a failing test in src/components/MyComponent.test.ts to the MyComponent.vue file it exercises.

After identifying a failing test, Atlas uses its lsp tool to understand the relationship between the Vitest test and the Vue component or utility it's testing. For instance, if src/components/MyComponent.test.ts fails, Atlas will use lsp.goToDefinition to jump from the test's import statement to the actual src/components/MyComponent.vue file. It can then use lsp.findReferences to see where methods or properties within MyComponent.vue are used, both within the component itself and potentially in other parts of the application, like a Vuex store or Pinia store in src/stores/myStore.ts. This deep code indexing, built on tree-sitter, allows Atlas to walk the call path accurately, understanding the Composition API structure and how data flows through a Vue application. This is far more precise than blind line windows, ensuring Atlas comprehends the semantic structure of your Vue project.

How Atlas adds temporary logging and fixes Vue code

Atlas adds temporary logging to Vue components or Vitest tests using the edit tool, or re-runs tests with verbose flags via bash, to form and check hypotheses. In 2026, once the root cause is identified, Atlas fixes the production code in files like src/components/MyComponent.vue with edit or apply_patch.

To debug a failing Vue test, Atlas forms a hypothesis about the cause. It can then check this hypothesis by adding temporary console.log statements directly into the Vue component's <script setup> block in src/components/MyComponent.vue or within the Vitest test file using the edit tool. Alternatively, Atlas can re-run the test with a verbose flag through bash, for example, pnpm test --filter <test-name-regex> --verbose, to get more detailed output from Vitest. Once the problem is pinpointed, Atlas uses edit to make precise changes to the production code. For more extensive fixes that span multiple hunks or files, Atlas employs apply_patch, which computes a unified diff and applies it, ensuring robust and atomic changes. This iterative process of hypothesis, check, and fix is central to Atlas's debugging workflow, mirroring a human developer's approach but with AI-driven precision.

How Atlas ensures safe and reviewable Vue code changes

Atlas ensures safe and reviewable Vue code changes by presenting a unified diff for every file edit and requiring explicit approval before writing to disk. In 2026, this permission-gated approach, combined with git integration, allows Vue developers to review every proposed fix to files like src/components/MyComponent.vue before it's committed.

Every action Atlas takes that modifies your Vue project's codebase, whether it's adding a temporary console.log or fixing a bug in src/utils/api.ts, is permission-gated. Before any edit or apply_patch operation is executed, Atlas computes a unified diff for the proposed changes and surfaces it for your approval. This means you, the Vue developer, always have the final say. Atlas also integrates deeply with git, reading branches, status, and diffs. It can stage and create commits on your behalf, or snapshot file changes as git patches, allowing for easy diffing and rollback if needed. This transparent and controlled workflow ensures that all changes to your .vue components, Vitest tests, or prettier configurations are thoroughly reviewed, maintaining code quality and preventing unintended side effects in your Vue application.

Step by step

01Run the failing Vitest test in isolation: Instruct Atlas to run pnpm test --filter <test-name-regex> using the bash tool, replacing <test-name-regex> with the specific name of your failing Vitest test in your Vue project.
02Analyze the test and Vue component code: Use Atlas's read tool to examine the failing Vitest test file (e.g., src/components/MyComponent.test.ts) and then use the lsp.goToDefinition and lsp.findReferences tools to trace the call path into the relevant Vue component (e.g., src/components/MyComponent.vue) or utility.
03Form a hypothesis and add temporary logging: Based on the code analysis, ask Atlas to form a hypothesis. Then, use the edit tool to insert temporary console.log statements into the Vue component's <script setup> block or the Vitest test, or re-run the test with pnpm test --filter <test-name-regex> --verbose via bash to gather more information.
04Fix the production Vue code: Once the root cause is identified, instruct Atlas to fix the production code in the relevant Vue file (e.g., src/components/MyComponent.vue or src/stores/myStore.ts) using the edit tool. For larger changes, use apply_patch.
05Verify the fix and clean up: Re-run the single Vitest test with pnpm test --filter <test-name-regex> via bash to confirm the fix. Then, run the full test suite with pnpm test and use the edit tool to remove any temporary console.log statements added earlier.

Frequently asked questions

How does Atlas run only one specific Vitest test in my Vue project?: Atlas uses the bash tool to execute pnpm test --filter <test-name-regex>, leveraging Vitest's built-in filtering to run only the specified test in your Vue application.
Can Atlas understand Vue's Composition API and single-file components?: Yes, Atlas indexes code by AST declarations using tree-sitter, allowing it to deeply understand Vue's Composition API, single-file components (.vue files), and related structures like Pinia stores.
What if I need to add a console.log to a Vue component for debugging?: Atlas can use its edit tool to insert console.log statements directly into the <script setup> block of your Vue component file, just as you would manually.
How does Atlas ensure I review its proposed fixes to my Vue code?: Atlas computes a unified diff for every proposed file edit and surfaces it for your explicit approval before writing any changes to your Vue project's files.
Does Atlas support pnpm for package management in Vue projects?: Yes, Atlas is designed to work direct with pnpm as the package manager for your Vue projects, executing commands like pnpm test through its bash tool.
Can Atlas help me fix a bug in a Vuex or Pinia store?: Absolutely. Atlas can navigate through your Vuex or Pinia store files (e.g., src/stores/myStore.ts) using lsp and apply fixes with edit or apply_patch, just like any other Vue-related code.
What if a fix requires changes across multiple Vue files?: For changes spanning several hunks or multiple Vue files, Atlas can use the apply_patch tool to compute and apply a unified diff, ensuring all related changes are handled cohesively.

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