Mastra

Create and review Mastra tests that reproduce user-visible failures through public APIs, real network requests, and actual storage. Verify that tests fail before a fix and cover the different execution paths affected by the bug.

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• Reproduce a reported bug before fixing it
• Review tests that rely heavily on mocked dependencies
• Check regression coverage across engines and adapters

Review and test a pushed Factory branch before a pull or merge request is opened. Record findings against the exact tested commit, then approve the work or return it to the builder with actionable changes.

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• Reviewing a branch before opening a pull request
• Checking whether earlier review findings were fixed
• Recording test results and required changes

Investigate a GitHub issue or bug report by tracing code, checking relevant history, and testing the diagnosis where needed. Receive a concise verdict, supporting evidence, a proposed fix direction, and a record for follow-up questions.

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• Triaging a newly reported bug
• Tracing the root cause of unexpected behavior
• Investigating a regression and its originating change

Review a pull request by first forming an independent view of the problem and design. Investigate code, history, and evidence, then deliver a clear verdict, specific change requests, and a saved record for follow-up questions.

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• Assessing the design and scope of a pull request
• Reviewing your own changes before sharing them
• Checking whether revisions resolve earlier findings

Draft and post GitHub pull request reviews and issue comments with precise locations, required changes, and supporting reasons. It checks the posting account, applies approval rules, and selects the appropriate review outcome.

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• Draft a pull request review with actionable required changes
• Explain an issue's cause and requested fix
• Check posting approval and self-review handling

Query Herdr's Review Manager and Work Manager across repositories to recommend actionable pull requests. Compare review status, automated checks, size, and local state, and create local review checkouts for explicitly confirmed remote-only records.

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• Choose the next pull request to review
• Find author follow-up work and failing automated checks
• Check local changes and stale manager records

Review code for security vulnerabilities using a checklist covering unsafe input, authentication, access permissions, secrets, and data exposure. Classify findings into four severity levels to distinguish exploitable flaws, issues needing investigation, and smaller improvements.

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• Review SQL, shell commands, and HTML for unsafe input
• Check authentication and access permissions
• Find exposed credentials and sensitive log data

Design a general-purpose assistant for tasks such as email summaries, short reply drafts, and note capture. The playbook defines task boundaries, completion criteria, and concise responses, with only the tools needed for the requested work.

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• Designing an assistant for email summaries
• Building a helper for short reply drafts
• Defining the scope of a note-taking assistant

Re-review a GitLab merge request after new commits, track the outcome of every previous finding, and inspect both new changes and the full proposal. Verify the current code, then publish a test report and review verdict.

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• Re-reviewing a merge request after fixes
• Tracking the resolution of earlier review findings
• Checking new commits for regressions and incomplete fixes

Find installable agent skills for a specific task, check their sources and adoption, and present relevant options with explanations, links, and installation commands. Help install a selected skill when the user wants to proceed.

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• Find skills for a specific task or field
• Compare skill sources and adoption before installation
• Get installation commands and links for relevant skills

Audits Mastra documentation against repository source and canonical writing guidance. Checks examples in context, API reference coverage, and targeted automated results, then produces an evidence-based report with findings and limitations without editing files.

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• Auditing every changed documentation page in a pull request
• Checking code examples against source and surrounding explanations
• Finding missing or incorrect API reference details

Reproduce Mastra Code bugs with a real model and compare timestamped logs across network, streaming, execution, and terminal interface layers. Use the evidence to locate timing problems, incorrect token rates, flicker, or stuck status displays.

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• Investigating incorrect token rate displays
• Reproducing intermittent bugs with a real model
• Tracing flicker or stuck status displays

Create a dedicated test project linked to the current worktree and check Agent Builder through APIs and browser interactions. It covers agent and skill management, permissions, defaults, and related features, with selectable test sections.

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• Validate an Agent Builder feature branch before review
• Check role-based permissions and authentication
• Test agent and skill management through APIs and the UI

Write integration tests for core error processors by simulating API failures with a mock model. Check retry attempts, changes to conversation messages, and streamed responses, with guidance on test setup and diagnosing empty output.

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• Check retries and message changes after API errors
• Diagnose empty output in streaming tests
• Verify unrelated errors pass through unchanged

Update the GitHub issue linked to completed Factory work after verifying the target repository. Remove specified triage labels and, for open issues, add a pending-close label and completion comment without closing the issue.

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• Updating an issue after Factory work is complete
• Removing triage labels from completed work
• Adding a pending-close label and completion comment

Coordinate multiple Mastra Code workers to investigate and fix GitHub issues in parallel. Keep each issue in a separate working directory, track progress in reports, review changes, and manage pull requests, reviewer feedback, and automated checks.

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• Investigate and fix several GitHub issues in parallel
• Find issue candidates based on contribution history
• Track progress and blockers for each issue

Build and update Mastra application interfaces using existing components from @mastra/playground-ui. Follow shared visual styles, arrange layouts with Tailwind utilities, and connect themes and stylesheets while avoiding duplicated components or unsupported appearance overrides.

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• Building a new Mastra application screen
• Adjusting layouts with existing components
• Connecting shared themes and stylesheets

Helps build customer support agents that classify incoming messages, draft replies, and hand difficult cases to people. Defines clear rules for permitted actions, policy-based answers, privacy concerns, and verification before reporting an action as complete.

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• Designing an agent that classifies incoming support messages
• Building a refund email agent with policy-based replies
• Defining rules for handing sensitive cases to a person

Create and improve Playwright end-to-end tests for Studio changes. Check complete user actions, including whether settings affect requests, data survives reloads, tools return expected results, and workflows pass data correctly.

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• Testing whether agent settings affect actual requests
• Checking that saved data survives page reloads
• Verifying tool outputs and workflow data flow

Build working web pages, application interfaces, and components with a clear visual direction. Shape typography, color, layout, and animation around the intended audience and purpose, producing coordinated design and code in HTML, CSS, JavaScript, React, or Vue.

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• Building a landing page with a clear visual style
• Designing and implementing a dashboard
• Refining typography, colors, and spacing in an existing interface

Configure Factory board behavior and GitHub or Linear event handlers in deployment code. Adjust stage transitions, phase meanings, and tool-result handling, then check the changes with focused tests and versioned audit records.

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• Add approval requirements to board transitions
• Change GitHub or Linear event handling
• Define custom board phases and tool-result rules

Turn a development goal into a focused ralph-loop command through conversation and codebase research. Define context, setup steps, ordered tasks, and testing criteria, then produce a complete command ready to copy.

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• Turning a vague feature idea into concrete tasks
• Planning work around existing code patterns
• Defining build checks and completion criteria

Re-review a pull request after new commits arrive. Check every previous finding, inspect the new changes for regressions, and review the full current change. Run relevant verification and publish a test report and review verdict within Factory.

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• Checking whether previous review findings were addressed
• Finding regressions introduced by follow-up commits
• Re-running tests against the current PR head

Investigates GitHub or Linear issues through code, change history, and reproduction attempts. Produces a structured handoff covering causes, assumptions, effort, and impact, then requests the appropriate Factory workflow stage update when applicable.

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• Investigating the root cause of a reported bug
• Checking for duplicate issues or regressions
• Preparing findings for whoever plans the fix