[andystaples]

Summary

Move repository development and CI tooling from the root requirements files and hard-coded install lists into PEP 735 [dependency-groups] in the root pyproject.toml.

• Share the test group between Nox sessions and the official build so new test dependencies do not require a separate pipeline update.
• Define focused groups for linting, type checking, builds, protobuf generation, Nox, example validation, and Functions E2E tests, plus an aggregate dev group.
• Update GitHub Actions, the official pipeline, Makefile, and contributor documentation to use the groups with pip 25.1 or later.

Runtime dependencies and public extras remain in package metadata. The official build continues to resolve SDK runtime dependencies from built wheels rather than a preinstalled development environment. Sample and Function app requirements files remain unchanged.

Relates to #333.

[Copilot]

🟢 Approval recommended

No active review issues were identified for the consolidation of development and CI tooling into shared dependency groups.

No open issues 🎉

What changed in this PR

Centralizes development and CI tooling in root pyproject.toml dependency groups, reducing dependency drift between local checks and the official build. Runtime dependencies remain in package metadata and are resolved from built wheels in official CI.

Changes:

• Adds focused tooling groups and an aggregate dev group, replacing root requirements files.
• Updates Nox, GitHub Actions, the official pipeline, and Makefile to use groups with pip 25.1 or later.
• Updates contributor documentation while leaving sample and Function app requirements unchanged.

File	Description
requirements.txt	Removes the legacy development dependency list.
pyproject.toml	Defines shared development and CI dependency groups.
noxfile.py	Installs session tooling through shared groups.
Makefile	Uses the dev group and editable package installs.
eng/​templates/​build.yml	Uses shared build, lint, and test groups while preserving wheel-based runtime validation.
docs/​development.md	Documents group-based setup and dependency ownership.
dev-requirements.txt	Removes the legacy tooling dependency list.
.github/​workflows/​typecheck.yml	Installs Nox through its dependency group.
.github/​workflows/​durabletask.yml	Updates core CI to group-based Nox installation.
.github/​workflows/​durabletask-azuremanaged.yml	Updates Azure Managed CI to group-based Nox installation.
.github/​workflows/​durabletask-azurefunctions.yml	Updates Functions CI to group-based Nox installation.
.github/​copilot-instructions.md	Updates tooling installation guidance and dependency references.

_{Review effort: Balanced}