renderers: Token-Level Templating for Agentic RL
Open-sourcing renderers, a standalone Python library for token-level chat templating that keeps multi-turn RL rollouts stable, parseable, and packable.
renderers: Token-Level Templating for Agentic RL Today we're open-sourcing renderers , a standalone Python library that gives developers full control over conversation formatting for RL and multi-turn inference. The renderer abstraction, introduced by OpenAI's Harmony template for gpt-oss and popularized by Thinking Machines' Tinker cookbook , turns model chat templates into programmable Python objects. Instead of treating a chat template as a black-box Jinja string that formats messages, renderers exposes the operations RL systems actually need: rendering messages to token ids, parsing comple
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