### New Features
- DeepSeek provider support with V4 Flash/Pro models and `DEEPSEEK_API_KEY` authentication. See [README.md#providers--models](README.md#providers--models) and [docs/providers.md#api-keys](docs/providers.md#api-keys).
- Provider request timeout/retry controls via `retry.provider.{timeoutMs,maxRetries,maxRetryDelayMs}`, useful for long-running local inference and provider SDK retry behavior. See [docs/settings.md#retry](docs/settings.md#retry). ([#3627](https://github.com/badlogic/pi-mono/issues/3627))
### Added
- Added DeepSeek to built-in provider setup, default model resolution, and provider documentation.
### Fixed
- Fixed `/copy` to avoid unbounded OSC 52 writes and clipboard races that could break terminal rendering or panic the native clipboard addon ([#3639](https://github.com/badlogic/pi-mono/issues/3639))
- Fixed extension flag docs to show `pi.getFlag()` using registered flag names without the CLI `--` prefix ([#3614](https://github.com/badlogic/pi-mono/issues/3614))
- Fixed provider retry/timeout settings wiring by adding `retry.provider.{timeoutMs,maxRetries,maxRetryDelayMs}`, migrating legacy `retry.maxDelayMs`, and forwarding provider controls into `streamSimple` request options ([#3627](https://github.com/badlogic/pi-mono/issues/3627))
- Fixed Windows git package installs to bypass `cmd.exe` for native git commands, so install paths containing spaces no longer break `pi install git:...` with `fatal: Too many arguments` ([#3642](https://github.com/badlogic/pi-mono/issues/3642))
- Fixed DeepSeek V4 session replay 400 errors by sending DeepSeek-compatible thinking controls and replayed assistant `reasoning_content` fields ([#3636](https://github.com/badlogic/pi-mono/issues/3636))
- Fixed GPT-5.5 generated context window metadata to use the observed 272k limit.
- Fixed CSI-u Ctrl+letter decoding inside bracketed paste, so pasted modified-key escape sequences no longer become literal editor text ([#3623](https://github.com/badlogic/pi-mono/pull/3623) by [@Exrun94](https://github.com/Exrun94))