Triage deprecation warnings seen in test output — fix ones caused by your change immediately, track pre-existing ones with a GitHub issue. Use whenever a deprecation warning (framework or runtime warning about a deprecated API) appears while running tests.
Write .NET unit tests using FunFair.Test.Common/FunFair.Test.Infrastructure base classes, mocking helpers, date sources, and xunit assertion patterns instead of hand-rolled equivalents. Use whenever writing or reviewing a .NET unit test (a *.Tests project).
Create, name, and maintain git branches — branching rules, Conventional Commits-style branch naming, rebasing against main, resuming interrupted work, and resolving version conflicts in dependency manifests during merges/rebases. Use when starting new work, creating a branch, resuming work on an existing branch, rebasing, or resolving merge conflicts.
Commit and push changes safely — branch checks, build/test gates, Conventional Commits format, and push cadence. Use whenever about to commit, stage, or push changes in any repository, or when acting as the Committer agent.
Create and manage GitHub issues correctly — duplicate search, planned descriptions, priority/status labels, assignment, and the Blocked label rules for AI-initiated issues, including the mandatory tracking issue required before starting any ad-hoc task. Use when asked to create a GitHub issue, when raising an issue autonomously, when a human asks you to do something and no existing issue or PR is already specified, when a PR or issue comment asks you to raise an issue, when selecting the next issue to work on, or when asking a blocking question and needing to mark an item Blocked.
Design and optimise performance-critical code, and back optimisations with committed benchmarks and measured allocation thresholds. Use when writing or optimising performance-critical code, or when asked to add or update a benchmark.
Keep pull request titles, bodies, and labels in sync with their linked issues, and manage PR lifecycle including bot-created PR ownership and draft state. Use on every agent run that interacts with a PR, when creating or updating a PR, when checking for existing PRs before starting work, when replying to PR comments, when checking CI status on a PR, or when blocking a PR pending human input.
Run before starting any work on an issue or PR in a repository. Verifies language/runtime prerequisites, runs the pre-commit baseline against all tracked files, and runs dotnet buildcheck in .NET repositories. Use at the start of every task, before writing any code, to ensure CI results are unambiguous.