# Temporal Payloads Codecs > Payload converters/codecs and encryption/PII boundaries for Temporal .NET. Emphasizes determinism constraints and safe placement. Use when this capability is needed. - Skill: `tomevault-io/temporal-payloads-codecs` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/temporal-payloads-codecs` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/temporal-payloads-codecs/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/temporal-payloads-codecs --- # Payloads, Converters, Codecs, and Encryption Boundaries ## When to use Use when the user asks about: - serialization formats and payload converters - codec servers / encryption-at-rest of payloads - PII handling and data minimization in histories - determinism implications of codecs/converters ## Required output - Recommended approach (converter vs codec) and where it runs - Determinism note: what must be stable and why - Placement guidance: Workflow vs Activity vs Worker vs external codec server ## Guardrails - Encryption and codecs must not introduce nondeterminism. - Codec servers belong outside workflows. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/rebeccapowell) — claim your Tome and manage your conversions.