# Pi v0.79.9: chat-template thinking for DeepSeek/vLLM, GLM-5.2 routing fixes

> OpenAI-compatible custom providers can now map Pi thinking levels into chat_template_kwargs, enabling vLLM/Hugging Face chat-template models such as DeepSeek to use provider-native thinking controls. GLM-5.2 gets corrected Fireworks OpenAI-compatible routing and OpenRouter xhigh thinking support. Multiple fixes include session extension reuse, deep branch quadratic-time fix, streaming code fence flicker, fuzzy edit file rewrite, and /model ranking improvements.

| | |
|---|---|
| **Tool** | Pi |
| **Version** | v0.79.9 |
| **Kind** | release |
| **Published** | 2026-06-20 |
| **Observed** | 2026-08-21 |
| **Significance** | 2/5 |
| **Breaking** | no |
| **Categories** | feature, fix |

## What changed


- Chat-template thinking: OpenAI-compatible providers can map Pi thinking levels into `chat_template_kwargs` for vLLM/HF models like DeepSeek
- GLM-5.2: corrected Fireworks routing to OpenAI-compatible Chat Completions endpoint with `reasoning_effort`
- GLM-5.2: OpenRouter `xhigh` reasoning effort exposed via native `xhigh` parameter
- Fixed same-directory session switches reusing imported extension modules while preserving fresh instances
- Fixed deep session branches taking quadratic time to build context/branch paths
- Fixed Markdown streaming code fence rendering — partial closing fences no longer shrink/flicker code blocks
- Fixed fuzzy `edit` matches preserving untouched line blocks instead of rewriting whole file
- Fixed bash commands through legacy WSL `bash.exe` passing scripts over stdin for variable expansion
- Fixed `/model` hiding GitHub Copilot models unavailable to authenticated account
- Fixed `/model` search ranking exact provider-prefixed matches before proxy-provider model ID matches
- Fixed RPC unknown-command errors including request id to prevent client hangs


## Sources

- [github_release](https://github.com/earendil-works/pi/releases/tag/v0.79.9) — retrieved 2026-08-21


## Community

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Canonical: https://changelogs.info/pi/v0-79-9
Entity: https://changelogs.info/pi
Event ID: `evt_2026-06-20_pi_v0-79-9`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.