DevFixes
The error-resolution engine

Fix programming errors faster.

Paste any error, log, or stack trace. Get the root cause, the most likely fixes, and the context to prevent it next time.

Error input
DetectedWaiting for input
Root cause candidate-
Confidence -
17published error guides
16covered technologies
10sections per guide
5core ecosystems
Start with your stack

Errors by developer ecosystem

Open a focused index for the tools developers use every day, with common failures visible before you search.

3 guides

Python

Imports, virtual environments, permissions, packaging, and tracebacks.

ModuleNotFoundError: No module named 'requests'ModuleNotFoundError: No module named ...
Browse Python errors
3 guides

Node.js

Module resolution, npm dependencies, runtime failures, and build scripts.

Error [ERR_MODULE_NOT_FOUND]: Cannot find packagenpm ERR! ERESOLVE unable to resolve dependency tree
Browse Node.js errors
2 guides

Git

Push rejections, branches, remotes, merges, credentials, and history.

Git push rejected: non-fast-forwardgit@github.com: Permission denied (publickey)
Browse Git errors
2 guides

GitHub

SSH access, repository permissions, Actions workflows, and CI failures.

git@github.com: Permission denied (publickey)Error: Process completed with exit code 1
Browse GitHub errors
3 guides

VS Code

CLI launchers, interpreters, extensions, terminals, and workspace setup.

code: command not foundModuleNotFoundError: No module named 'requests'
Browse VS Code errors
Live signals

What developers are fixing now

01Error [ERR_MODULE_NOT_FOUND]: Cannot find packagePackages and imports02Hydration failed because the server rendered HTML did not matchRendering03Error: Process completed with exit code 1CI and automation04git@github.com: Permission denied (publickey)Authentication05TypeError: Cannot read properties of undefinedRuntime06npm ERR! ERESOLVE unable to resolve dependency treePackages and imports
Explore the index

Browse by technology

Languages

Python JavaScript TypeScript Java C# Go Rust PHP C++

Frameworks

React Next.js Vue Angular Django FastAPI Laravel Spring

Developer tools

VS Code Node.js GitHub Cursor GitHub Copilot OpenRouter Ollama Docker Desktop

DevOps

Docker Kubernetes Git GitHub Actions Linux Ubuntu Windows WSL

Cloud

AWS Azure Google Cloud Firebase Supabase Cloudflare

Databases

PostgreSQL MySQL MongoDB Redis SQLite
Trusted source code

GitHub repositories worth knowing.

These are primary sources for understanding how major developer tools behave, checking confirmed issues, and separating a real product bug from a project configuration error.

View repository guide VS Code extension guide
microsoft/vscodeVS CodeThe editor source and issue tracker. Use it to verify regressions, extension-host failures, and platform-specific editor behavior.nodejs/nodeNode.jsThe Node.js runtime source. Use it for runtime errors, module-loader behavior, release notes, and confirmed platform bugs.python/cpythonPythonThe reference Python implementation. Use it for interpreter behavior, standard-library issues, and version-specific changes.git/gitGitThe Git source repository. Use it for command behavior, release history, documentation, and low-level repository problems.github/docsGitHubThe source for GitHub documentation. Use it for authentication, repositories, Actions, security, and account workflows.actions/runnerGitHub ActionsThe official Actions runner. Use it for runner releases, job execution behavior, labels, and runner-specific failures.
Error fingerprint

Find the cause hidden inside the noise.

DevFixes reads a trace as a sequence of events, separates framework internals, and ranks the lines most likely to explain the failure.

Root-cause isolationPinpoints the first actionable failure.
Probability-ranked fixesStarts with the fix most likely to work.
Prevention guidanceShows how to keep the error from returning.
Analyze an error
checkout-service / traceback.logPython
01 Traceback (most recent call last):02   File "/app/api/orders.py", line 8403     total = calculate_total(items)04   File "/app/core/pricing.py", line 2705     return subtotal + discount06 TypeError: unsupported operand type(s)
Most likely root causediscount is None, not a number94%
Complete error coverage

Every guide answers the next question.

Plain-English meaningUnderstand the failure before changing code.
Common root causesCheck the likely causes in probability order.
Copyable commandsRun quick fixes and verify the expected output.
Environment variantsUse the correct Windows, macOS, Linux, Docker, or CI path.
Broken and corrected codeCompare a real failure with the working version.
Primary referencesContinue with official docs and source repositories.