praxstack

Principal-engineer-grade autonomous execution mode for any AI coding agent. Calibrates rigor to task size: one primitive cycle for tiny work, 3-phase contract for small, 10-phase for medium/large. Loops until verified. Keep-or-revert on every change. Writes…

Host-neutral autonomous software work protocol. Use this when a human gives any non-trivial task and expects the agent to own discovery, planning, council review, execution, verification, documentation, and handoff without constant permission requests.…

Principal-engineer standards for backend services, APIs, data modeling, distributed systems, and reliability. Use when building or reviewing REST/GraphQL/gRPC APIs, database schemas, service boundaries, caching strategies, messaging, observability, or scaling…

Principal-engineer-grade C++ backend design, implementation, and review for performance-critical services, networking, storage, and infrastructure. Covers C++20/23, RAII, ownership, modern concurrency (std::jthread, std::atomic, lock-free where proven),…

Principal-engineer-grade Java backend design, implementation, and review. Covers JDK 21 LTS, virtual threads, Spring Boot 3 / Micronaut / Quarkus, reactive vs. imperative, JVM tuning, concurrency primitives, and Java-specific failure modes (connection pool…

Principal-engineer-grade JavaScript (non-TypeScript) backend design, implementation, and review. Covers Node 20+ LTS / Bun, modern ESM, runtime validation (Zod/Ajv), JSDoc types, Fastify/Hono/Express, Prisma/Drizzle, and JavaScript-specific failure modes…

Principal-engineer-grade guidance for the Node.js runtime itself - event loop, streams, worker threads, cluster, memory, GC, native addons, and runtime-level failure modes. Covers diagnosing event-loop lag, heap leaks, CPU profiling, AsyncLocalStorage,…

Principal-engineer-grade Python ML backend design, implementation, and review - training pipelines, inference services, feature stores, and MLOps. Covers data quality and leakage, reproducibility, evaluation rigor (offline + online), model monitoring for…

Async deep research via Gemini Interactions API (no Gemini CLI dependency). RAG-ground queries on local files (--context), preview costs (--dry-run), structured JSON output, adaptive polling. Universal skill for 30+ AI agents including Claude Code, Amp,…

Research what people actually say about any topic in the last 30 days. Pulls posts and engagement from Reddit, X, YouTube, TikTok, Hacker News, Polymarket, GitHub, and the web. Includes a doctor health check to diagnose broken or missing sources.

Drive Markdown Viewer Pro (Vite + vanilla JS) like a user and capture proof. Use when verifying UI changes, markdown rendering, themes, view modes, or any feature in this repo's web app.

Scans Algorand smart contracts for 11 common vulnerabilities including rekeying attacks, unchecked transaction fees, missing field validations, and access control issues. Use when auditing Algorand projects (TEAL/PyTeal).

Scans Cairo/StarkNet smart contracts for 6 critical vulnerabilities including felt252 arithmetic overflow, L1-L2 messaging issues, address conversion problems, and signature replay. Use when auditing StarkNet projects.

Create, update, and manage GitHub issues using MCP tools. Use this skill when users want to create bug reports, feature requests, or task issues, update existing issues, add labels/assignees/milestones, set issue fields (dates, priority, custom fields), set…

Router for the gstack skill suite. (gstack)

Scans Solana programs for 6 critical vulnerabilities including arbitrary CPI, improper PDA validation, missing signer/ownership checks, and sysvar spoofing. Use when auditing Solana/Anchor programs.

Create exhaustive BLUEPRINT.md files — the implementation bible that expands a SPEC.md into maximum granular detail so an AI coding agent can translate it line-by-line into code with zero interpretation. This skill REQUIRES a SPEC.md to already exist. Use…

Create production-grade SPEC.md files — portable implementation contracts that any AI coding agent can build from without follow-up questions. Use this skill whenever the user wants to write a spec, specification, technical spec, implementation contract,…

Scope-calibrated ultra-rigor workflow for hard reasoning, high-risk code changes, architecture decisions, debugging with multiple plausible root causes, security-sensitive work, and user requests like "ultra reasoning", "think harder", "verify everything",…

Distinguished Principal Engineer backend/system architecture skill. Use when the user demands "BackendPE", "Supermode", "Antigravity", or requests high-performance, unlimited-context, world-class backend and distributed systems design. This skill maximizes…

Principal backend engineering intelligence for C++ systems and performance-critical services. Actions: plan, design, build, implement, review, fix, optimize, refactor, debug, secure, scale backend code and architectures. Focus: correctness, memory safety,…

Principal backend engineering intelligence for Java services and distributed systems. Actions: plan, design, build, implement, review, fix, optimize, refactor, debug, secure, scale backend code and architectures. Focus: correctness, reliability, performance,…

Principal backend engineering intelligence for JavaScript services. Actions: plan, design, build, implement, review, fix, optimize, refactor, debug, secure, scale backend code and architectures. Focus: correctness, reliability, performance, security,…

Principal backend engineering intelligence for Node.js runtime systems. Actions: plan, design, build, implement, review, fix, optimize, refactor, debug, secure, scale backend code and architectures. Focus: correctness, reliability, performance, security,…

Improve a prompt on the evaluations workbench through a measured loop. Score the baseline first, then duplicate the target column, form a hypothesis from failing rows, edit the copy's prompt draft, run, compare pass rate and cost, and repeat until the numbers…

Turns production evidence into tested improvements for your AI agent. Forms hypotheses from real traces and analytics, explains the reasoning behind each one, then executes with the user: scenario tests that reproduce production failures, prompt and code…

Drive the page the user has open through live UI actions. List the actions a page accepts, call them with typed payloads, and read the live state including unsaved edits. Use when the user is looking at a page you can operate, such as the evaluations…

Connect the codebase's AI agent to LangWatch agent simulations over HTTP, so scenario suites run against it from the platform. Finds or adds the agent's chat endpoint, wires authentication for scenario traffic, makes the server adopt the W3C traceparent…

Create and run LangWatch experiments for pre-deployment batch testing. Use when the user wants to test an agent against a dataset, compare prompts or models, benchmark quality, detect regressions, or add a CI quality gate. Do not use for production monitoring…

Take your AI agent to the next level with full LangWatch integration. Adds tracing, prompt versioning, evaluation experiments, and simulation tests in one go. Use when the user wants comprehensive observability, testing, and prompt management for their agent.

Configure LangWatch online evaluations and guardrails for production traffic. Use when the user wants to score live traces or threads, monitor production quality, sample incoming traffic, or synchronously block unsafe requests and responses. Do not use for…

Version and manage your agent's prompts with LangWatch Prompts CLI. Use for both onboarding (set up prompt versioning for an entire codebase) and targeted operations (version a specific prompt, create a new prompt version). Supports Python and TypeScript.

Route work to cmux Cloud machines (persistent cloud VMs) from the CLI — `cmux vm route`/`run`/`agent` pick a machine for you; `vm tree` / `surface ls` show the surface catalog (This Mac and every machine: terminals, VNC screens, browsers) and `vm open` /…

Stripe checkout, pricing, subscription, Pro plan, webhook, and entitlement runbook for cmux billing work. Use when editing or debugging billing, pricing, Stripe Checkout, subscription recording, Pro plan status, webhooks, entitlement metadata, or pricing…

End-user browser automation with cmux. Use when you need to open sites, interact with pages, wait for state changes, and extract data from cmux browser surfaces.

Build and publish a self-contained HTML page to Superset, then answer the comments readers pin to it. Use when the user asks to make or publish a page, turn a report, dashboard, chart, doc, or analysis into a shareable link, update or re-version a page…

Use when adding or editing a GitHub Actions workflow, composite action, or reusable workflow under `.github/` — new CI jobs, triggers, matrices, checkout/clone tuning, action pinning, GitHub App token auth, concurrency groups, `timeout-minutes`, `paths`…

Author a new PostHog browser extension, or port a posthog-js v1 extension, against the @posthog/browser-common Client/Extension contract. Use when adding or porting an extension (autocapture, pageview, surveys, replay, exceptions, web-vitals, campaign-params,…

Expert guide for the Gemini Notebook (formerly Google NotebookLM) CLI (`nlm`) and MCP server - interfaces for Gemini Notebook. Use this skill when users want to interact with Gemini Notebook programmatically, including: creating/managing notebooks, adding…

Mole's project-specific incident catalog: twelve recurring bug shapes, grep probes, and regression guards. Use when a Mole symptom or diff touches destructive candidates or guards, uncertain discovery, bounded scans or TTY, Bash 3.2 or system parsing, stale…