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virtuslab

@virtuslab source repo

10 published skills

  1. ▌
    Java Best Practices · virtuslab bundle
    Opinionated modern Java (21+) coding best practices, style guides, and anti-patterns. Curated by VirtusLab engineers. Covers code style, null safety, error handling, immutability, testing, concurrency, and tooling.
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    Cellar · virtuslab
    Look up the public API of any JVM dependency (Scala 3, Scala 2, Java) from the terminal — type signatures, members, docs, and source as Markdown, no JAR unpacking needed. Use this skill whenever you need to call an unfamiliar library method, explore a package's types, or check a dependency's API. Prefer cellar over Metals MCP only for looking up external dependency APIs (`cellar get-external` vs Metals `inspect`/`get-docs`) — cellar needs no project import and queries any published Maven artifact.
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    Git Machete · virtuslab
    Use whenever invoking the `git machete` CLI to organize branch chains, compute fork points, run stacked rebases/merges, or manage GitHub/GitLab PR/MR chains - especially in a repo that already has a `.git/machete` file. Lists which subcommands modify `.git/machete`, run rebase/merge, run hooks, or read stdin, so the agent can pick the right one and pass the right flags. Crucially, names the commands that MUST be invoked with `-y/--yes` (and the few that have no `-y` and therefore must NOT be invoked at all without a tty) so the agent never hangs on an interactive prompt. Also warns against hand-editing the `.git/machete` layout file.
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    Using Orca · virtuslab bundle
    Use when delegating a well-defined implementation task to Orca's autonomous multi-agent flow — a headless plan-code-review CLI to hand a coding task to instead of implementing it yourself.
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    Direct Style Scala · virtuslab bundle
    Scala coding style, tooling, and functional programming guidance, with dedicated sections on direct-style Scala, Ox structured concurrency, and synchronous Tapir. Auto-load for any task involving Scala code, especially when using direct-style or "plain" Scala.
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    Scala3 Regression Issue · virtuslab bundle
    Draft GitHub issues for Scala 3 compiler regressions from minimized repros, version boundaries, bisect results, and community-build failures. Use when Codex needs to turn a confirmed Scala 3 regression into a ready-to-file `scala/scala3` issue title and body that matches existing regression reports.
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    Scala Regression Reproducer · virtuslab bundle
    Reduce Scala compiler or standard library regressions found in community-build projects to minimal, self-contained scala-cli repros. Use when a Scala nightly breaks a project under community-build3, when Codex needs to auto-discover the matching `scripts/run.sh` project key and baseline Scala version, when the regression must be confirmed with a known-good build and a nightly build, or when a failing build log needs to be minimized into `test.scala` / `test-macro.scala` files.
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    Scala CLI Adding Directives · virtuslab
    Add or change using directives in Scala CLI. Use when adding a new //> using directive, registering a directive handler, or editing directive preprocessing.
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    Scala CLI Integration Tests · virtuslab
    Add or run Scala CLI integration tests. Use when adding integration tests, debugging RunTests/CompileTests/etc., or working in modules/integration.
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  10. ▌
    Scala CLI Deprecating Features · virtuslab
    Deprecate CLI options, option aliases, using directives, sub-commands, or config keys in Scala CLI. Use when marking a feature as deprecated with a warning.
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