# Temporal Determinism Audit > Audit Temporal .NET workflow code for determinism/replay safety and produce compile-ready fixes. Use when this capability is needed. - Skill: `tomevault-io/temporal-determinism-audit` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/temporal-determinism-audit` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/temporal-determinism-audit/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Security - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/temporal-determinism-audit --- # Temporal Determinism Audit (C#) ## When to use Use this skill when the user: - pastes workflow code or a workflow diff - asks “is this safe in a workflow?” - gets replay / nondeterminism errors - reports flaky behavior that could be replay-related ## Required output Always produce: 1. **Findings** (bullets; severity: `breaks replay` / `risky` / `ok`) 2. **Fix** (compile-ready patch or rewritten snippet) 3. **Placement** (Workflow / Activity / Worker / Client) 4. **Replay note** (why this matters on replay) ## Non-negotiable forbidden list (workflows) - `Task.Run`, `Thread.Sleep`, `Task.Delay` - `DateTime.UtcNow` (use `Workflow.Now`) - `Guid.NewGuid()` (use `Workflow.NewGuid()`) - Random number generators (unless via Temporal deterministic APIs) - Locks/monitors/semaphores - Any file/network/database IO - Static mutable state ## Approved substitutes (workflows) - `Workflow.DelayAsync` - `Workflow.Now` - `Workflow.NewGuid()` - Deterministic control flow + calling Activities for side effects ## Common rewrite patterns - Move side effects into `[Activity]` methods - Use activity retry options (don’t “hide” failures) - Replace timers/delays with Temporal workflow timers ## If context is missing Assume code is workflow code unless the user states otherwise, and explicitly state that assumption. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/rebeccapowell) — claim your Tome and manage your conversions.