> ## Documentation Index > Fetch the complete documentation index at: https://docs.cubic.dev/llms.txt > Use this file to discover all available pages before exploring further. # Auto-fix > Let cubic fix the issues it finds in your pull requests cubic can automatically fix the issues from its review. It checks each issue, pushes fixes for the real ones to your pull request, and replies on every thread. Instead of copying the **Prompt for AI agents** into your own coding agent, let cubic do the work. You only need to answer the questions it can't decide alone. Auto-fix is in alpha and available to selected teams. To try it, email [contact@cubic.dev](mailto:contact@cubic.dev). cubic's Confirmed reply on a resolved review thread, naming its fix commit ## How it works When cubic finishes reviewing your pull request, auto-fix: 1. **Checks each issue** - Reads the code to see if the issue is real 2. **Fixes the real ones** - Makes the change and runs your lint, type-check, and tests where it can 3. **Pushes the fix** - Commits to your PR branch 4. **Replies on each thread** - Explains what it decided and resolves the thread when it's done Each push gets a new review. Auto-fix keeps going until a review finds no open issues. This needs automatic reviews of new commits, which are on unless `cubic.yaml` sets `reviews.incremental_commits: false`. cubic's fix commit in the pull request's commit list ## What cubic replies Each reply starts with cubic's decision: | Reply starts with | Meaning | Thread | | - | - | - | | **Confirmed.** | The issue is real. cubic fixed it and names the commit. | Resolved | | **Not an issue.** | The issue doesn't hold, or the change isn't worth the risk. | Resolved | | **Already fixed.** | A later commit fixed it. | Resolved | | **No longer applies.** | The code it flagged is gone. | Resolved | | **Needs your input.** | It needs a decision from you. cubic asks a question. | Open | Want a say before it runs? Reply on the thread. If you have write access, cubic follows your reply. For example, "leave it" means cubic won't change the code. ## Turn on auto-fix for a pull request The PR author and anyone with write access can turn auto-fix on or off from: * **GitHub** - Click **Turn on auto-fix** in the footer of cubic's review * **PR description** - Click **Turn on auto-fix** next to **Review in cubic** * **cubic** - Use the **Auto-fix** switch on the PR page * **Slack** - Click **Enable auto-fix** on cubic's review message * **MCP** - Ask your coding agent to call `set_pr_auto_fix` on the [cubic MCP server](/ide/mcp-server) Turn on auto-fix link in the footer of cubic's review Auto-fix starts right away on any open issues. cubic pushes fixes on behalf of the person who turned it on. ## Turn on auto-fix for a repository Admins and members can set auto-fix in [AI review → Fix with cubic](https://www.cubic.dev/ai-review?tab=background-agents), under **Auto-fix**: * **Off** - Auto-fix isn't available * **On demand** (default) - Someone turns it on for each pull request * **On** - Auto-fix turns on for every pull request that matches your rules. People can still turn it off on a pull request Auto-fix card set to On, with an Only auto-fix rule for one author and a Never auto-fix rule for bots ### Rules When auto-fix is **On**, rules pick which pull requests get auto-fix: * **Only auto-fix when…** - A pull request must match each of these. For example, an **Author** rule with your GitHub username runs auto-fix on your pull requests only * **Never auto-fix when…** - Any match skips the pull request. For example, skip `*[bot]` authors or PRs with a `no-auto-fix` label Rules can match the author, label, title, head branch, or base branch. They only decide whether auto-fix starts. Once it's on, turn it off on the pull request. You can also set the mode and rules in [cubic.yaml](/configure/cubic-yaml), under `issues`. `auto_fix_rules` takes the same PR keys as `auto_approve_rules`: `only_` or `exclude_` followed by `authors`, `labels`, `titles`, `head_branches`, or `base_branches`. ```yaml theme={null} issues: auto_fix: on # off | on_demand | on auto_fix_rules: only_authors: - alice exclude_labels: - no-auto-fix ``` If a rule in `cubic.yaml` has a blank value, a value longer than 256 characters, or an empty `only_` list, cubic ignores all the rules and keeps auto-fix **On demand** until you fix them, or **Off** if the file sets `auto_fix: off`. ## Follow a run Each run opens as a fix session in [Fix with cubic](https://www.cubic.dev/code/fix). You can watch the agent work and see what it fixed. You can't send it messages. An auto-fix run's fix session in cubic, showing the agent's steps and the pushed fix Open the session from: * The **cubic · Auto-fix** check on the pull request * cubic's comment on the pull request * The cubic PR page Click **Stop fix** to stop a run, or **Retry fix** to rerun a failed one. ## Stop auto-fix * **Turn it off** - From any place you can turn it on. A run in progress finishes first * **Push your own commits** - cubic stops the current run and picks up again after the next review * **Close or merge the pull request** - Auto-fix turns off ## Tell cubic how to fix cubic reads your repository's `AGENTS.md`. Keep general guidance for coding agents there. For guidance just for cubic's fixes, like which issues are worth fixing in your codebase, add [coding agent instructions](/ai-review/coding-agents#coding-agent-instructions). ## Troubleshooting * In [AI review → Fix with cubic](https://www.cubic.dev/ai-review?tab=background-agents), make sure the **Fix with cubic button** is on, **cubic** is the coding agent provider, and auto-fix isn't **Off** * Make sure you're the PR author or have write access to the repository * Pull requests from forks aren't supported, because cubic can't push to them * Check that the repository is set to **On** and the pull request matches your rules * If someone turned auto-fix off on the pull request, it stays off there. Turn it back on from the pull request * With label rules, auto-fix turns on after the first review, not when the PR opens * After three failed runs in a row, auto-fix stops. Click **Retry fix** in the fix session or push a commit * If you pushed commits, auto-fix picks up again after cubic reviews them * Auto-fix doesn't revisit an issue it already decided, but you can still ask for a fix. Comment `@cubic fix this` on the thread, and cubic starts a [separate fix](/ai-review/coding-agents#tagging-cubic-in-github-or-cubic) * For **Needs your input.**, tag cubic with your answer, for example `@cubic keep three retries and fix this` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.