vibes

Measure and shrink a Haskell/cabal project's build critical path with the ghc-build-stats GHC plugin + analyzer. Use when a build is slow, won't get faster with more cores, or you want to know which modules gate compilation and how to decouple them so more modules compile in parallel.

General Nix language and tooling guidance. Use when writing nix expressions, searching for nix functions or packages, debugging nix builds, or working with nixpkgs overlays, overrides, and shell.nix / default.nix files. Does NOT cover CI — see the ci-nix skill for nix/ci.nix and GitHub Actions.

Complexity canary: use haiku to verify code is understandable in isolation. Use as a standard review step after writing non-trivial code, after completing a feature, or when asked to "dumbify", "simplify for AI", or "review for complexity". Also trigger proactively when you've just written functions with 6+ parameters, 40+ lines, or deep nesting.

Fix CSS styling issues by visually comparing before/after screenshots. Use when the user reports visual alignment, spacing, margin, or padding problems on a web page. Also trigger when asked to fix layout issues, element spacing, or visual inconsistencies in CSS.

Create or update a GitHub pull request. Use when you need to open a PR, when the user asks for a PR, or after completing work that should be submitted as a pull request. Handles stale/closed/merged PRs automatically by checking remote state before acting — never relies on memory of PR state.

Bypass Anubis PoW bot-check pages using Playwright MCP. Trigger when navigating to a site blocked by Anubis ('Making sure you are not a bot!', 'Oh noes!', Anubis challenge page). Also invocable as /anubis-bypass <url>.

Post comments on Reddit via old.reddit.com using Playwright MCP. Use when the user wants to comment on a Reddit post, engage in Reddit discussions, or do ghostwritten Reddit engagement. Handles login, navigation, and comment submission. Also trigger when browsing Reddit or upvoting posts.

Solve reCAPTCHA v2 image challenges using Playwright MCP screenshot-based visual identification. Use when a web form has a reCAPTCHA "I'm not a robot" checkbox that triggers an image grid challenge.

Review and document investment portfolio positions from Interactive Brokers statements. Use when the user wants to review stocks, document investment theses, set exit strategies, or analyze portfolio positions. Also trigger when discussing IB statements, stock positions, or investment decisions.

Fetch and read Wikipedia articles. Use when you need to access Wikipedia content, since the WebFetch tool gets 403 errors from Wikipedia. Accepts an article title or search query as argument.

Startup accelerator mentor speed-dating roleplay. Use when the user wants to practice technical mentoring, simulate founder conversations, or prepare for accelerator mentor programs (Techstars, Startupbootcamp, Antler, etc.). Triggers on: "mentor practice", "mentor roleplay", "founder roleplay", "practice mentoring".

Write GitHub issues that stay in the problem domain. Use when creating issues, filing bug reports, or requesting features on any repository. Ensures issues describe what's wrong or needed without prescribing implementation details. For bugs, requires a failing reproducer on master before working on a fix.

Watch a GitHub Actions CI run without burning through API rate limits. Use when waiting for CI to pass, monitoring a PR's checks, or watching a specific workflow run. Prevents the common mistake of polling too frequently and exhausting the 5000 requests/hour GitHub API budget.

CI architecture using nix/ci.nix for local testing and GitHub Actions for platform-specific builds. Use when setting up CI, adding test jobs, debugging CI failures, or managing nix pins in Nix-based projects.

Rent and manage Vast.ai GPU instances for ML training, inference, and ONNX export. Use when renting GPUs, running remote training jobs, transferring files to/from GPU instances, or managing Vast.ai instances. Covers CLI setup, SSH access, file transfer, and instance lifecycle.

Train a Piper TTS voice model on a Vast.ai GPU instance. Use when fine-tuning text-to-speech models, preparing speech datasets, choosing base checkpoints, or deploying ML training to remote GPUs. Covers the full pipeline from dataset prep through ONNX export and quality testing.

Haskell project conventions based on jappeace/haskell-template-project. Use when creating new Haskell projects, adding cabal stanzas, configuring nix, setting up CI, or working on any Haskell codebase that follows the template pattern. Also use when the user asks to start or scaffold a new Haskell project.

Writing good error messages that help users understand and fix problems. Use when writing error handling code, improving diagnostics, adding user-facing error strings, or reviewing error messages. Also trigger when writing tests that assert error output.

GHC Backpack module system: signatures, indefinite libraries, instantiation, sub-library architecture, and Nix integration pitfalls. Use when working with Backpack signatures (.hsig files), indefinite/definite libraries, reexported-modules, or diagnosing Backpack-related build failures in cabal or nix.

Create a new Claude Code skill. Use when the user asks to write, create, or make a skill, slash command, or custom command for Claude Code.

Before committing test code, verify new tests fail on master. Trigger when adding test files, adding test cases to existing files, implementing TDD, fixing bugs with regression tests, or adding tests for new features. Also trigger when running cabal test or nix-build after writing tests — the verification step should happen before the final commit.

Haskell numeric conversion patterns using the unwitch library. Use when writing or reviewing Haskell code that converts between numeric types (Int, CInt, Int32, Word8, Double, etc.) or when encountering fromIntegral.