Best Deterministic AI Skills & MCP Servers

MCP server for agent session recording and replay — debug non-deterministic agent behavior with session comparison and divergence detection

Deterministic QA plugin for Claude Code — CRAP index, Technical Debt Ratio, tree-sitter AST, SARIF 2.1.0, hooks, and a local Vue dashboard.

Pre-execution governance for AI agents. Intercepts MCP tool calls before execution with deterministic blocking, human-in-the-loop holds, and behavioral drift detection.

ContextECF CodeLedger — deterministic context selection for AI coding agents. Safe unscoped alias for @codeledger/cli; avoid the unrelated codeledger package.

A local stdio MCP server that gives coding agents safe deterministic access to common local developer operations.

Scaffold a Tap v2 browser-automation plan in seconds. `npx create-tap-script <site>/<name>` generates a deterministic .plan.json that runs at zero LLM tokens in Claude Code, Cursor, and any MCP host.

Convert Playwright scripts into Tap v2 plans. Compile .spec.ts / .test.ts files into deterministic v2 Plan JSON that runs at zero LLM tokens in Claude Code, Cursor, and any MCP host.

Convert Puppeteer scripts to Tap Plan v2 — deterministic browser-automation plans for Claude Code, Cursor, and any MCP host. Zero LLM tokens at replay.

MCP server for csvtocsv.com — deterministic CSV transforms (Amazon→Shopify, Any-CSV→Amplitude cohort, CSV cleanup) usable from any agent runtime over stdio.

OpenCode plugin + MCP server + skill that runs an automated GitHub Copilot PR review loop: request review, wait deterministically via `gh run watch`, triage every comment, push fixes, reply, resolve, gated merge. Solves the silent-fail of github_request_c

Pre-execution governance for AI agents. Intercepts MCP tool calls before execution with deterministic blocking, human-in-the-loop holds, and behavioral drift detection.

Deterministic governance engine for AI agents — enforce worlds (permanent rules) and plans (mission constraints) with full audit trace

Extentos MCP server — deterministic tools for building Meta-glasses apps.

Categorized, deterministically-ranked SKILL.md catalog AND MCP server for Claude Code (and any agent that speaks MCP). 1128 curated skills across 17 categories — frontend, backend, video editing, AI video generation, UI design, motion graphics, 3D, devops

Tenpo — the operator that runs alongside your store. Connects to 47+ commerce platforms (Shopify, WooCommerce, BigCommerce, Klaviyo, Meta Ads, Alibaba, GA4, Stripe…) and gives any AI host (Claude Desktop, Cursor, Claude Code, ChatGPT) deterministic answer

MCP server for agent automation: persistent memory and deterministic workflow execution for AI agents and chats

Deterministic installer for the undoc MCP server, skills, and hooks across Claude Code, Cursor, Codex, and Claude Desktop.

Deterministic correctness testing for MCP servers

A deterministic compiler and linter for system architecture. Validate your architecture before you write code. OSS: structural validation + basic architecture lint (rule-based); FastAPI/Express export; OpenAPI document-shape; golden Docker/Makefile — no L

63 deterministic quant computation tools for AI agents. Black-Scholes, Greeks, exotic derivatives, portfolio optimization, Monte Carlo, risk metrics (VaR, Sharpe, drawdown), technical indicators, bond pricing, yield curves, crypto/DeFi (impermanent loss, liquidation, funding rate

Aleatoric Engine is deterministic market simulation infrastructure for generating reproducible, schema-stable synthetic market data used in financial research, validation, and systems testing. It prioritizes explicit configuration, reproducibility, and operational clarity over st