Open sourcing ether0 rewards, prompts, data utilities

[jamesbraza]

Also includes:

• Docs on use of our reasoning tokens
• Code quality in the form of unit tests and passing mypy 🥳

[Copilot]

Pull Request Overview

This PR open-sources the ether0 package and its remotes extension, adds comprehensive unit tests, and ensures type and lint checks pass via mypy and CI updates.

• Introduce fixtures and unit tests covering clients, rewards, and core utilities.
• Add retrying dataset loader, text‐validation helpers, prompt templates, data/models, chat formatting, and client/server implementations.
• Update pyproject.toml and CI workflows to include new ether0.remotes package, extras, and environment setup.

Reviewed Changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/conftest.py	Add ether0_test fixture to load the Hugging Face dataset.
src/ether0/utils.py	New retry loader, invalid‐character/language checks.
src/ether0/problem_prompts.py	Lots of new prompt template lists for problems.
src/ether0/models.py	Data models, enums, and filtering logic added.
src/ether0/model_prompts.py	XML‐based answer extraction and prompt enums.
src/ether0/data.py	SMILES parsing, drawing helpers, and ring/fingerprint checks.
src/ether0/clients.py	HTTPX‐based remote clients with retry logic.
src/ether0/chat.py	Chat conversation formatting for SFT/RL.
pyproject.toml	Pin dependencies, add ether0.remotes, mypy overrides.
packages/remotes/...	New ether0.remotes server, client tests, docs, and packaging.
docs/updated_mistral_chat_template.jinja	Jinja template for chat rendering with new tokens.
docs/adding_tokens.ipynb	Notebook demonstrating how to add reasoning tokens.

Comments suppressed due to low confidence (4)

src/ether0/utils.py:48

• Add a docstring to load_dataset_retrying summarizing the retry behavior, exceptions handled, and retry parameters, so future readers immediately understand why and how retries are configured.

def load_dataset_retrying(

src/ether0/data.py:72

• The comment notes that counterion-containing SMILES currently fail. Add a unit test exercising that pattern (e.g., [Cl-] or multi-fragment SMILES) to catch regressions or document the limitation explicitly.

SMILES_PATTERN = re.compile(

src/ether0/clients.py:17

• This global Counter tracks errors across calls and may not be thread-safe. Consider moving it into a thread-local or function-scoped context, or use an atomic structure if concurrency is expected.

SERVER_ERRORS_COUNTER = Counter({

docs/updated_mistral_chat_template.jinja:20

• The raise_exception call isn’t a built-in Jinja directive. Replace it with the supported {% raise "message" %} directive or register a custom function so unmatched roles actually trigger an error at render time.

{{- raise_exception("Only user, system and assistant roles are supported!") }}

[whitead]

huge win!