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chore: modernize build system — uv lockfile, Python >=3.12#83

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chore: modernize build system — uv lockfile, Python >=3.12#83
cagataycali wants to merge 5 commits intostrands-labs:mainfrom
cagataycali:chore/build-system-uv-py312

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@cagataycali cagataycali commented Apr 1, 2026 •
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TL;DR

Modernize the build system: add uv lockfile, bump Python to ≥3.12. No code logic changes. No dependency changes.

⚠️ Breaking Changes

  1. Python version: requires-python bumped from >=3.10 to >=3.12. Users on Python 3.10 or 3.11 must upgrade. This is required because LeRobot >=0.5.0 (a core dependency) requires Python 3.12+.
  2. Coverage not in default test run: --cov removed from pytest.ini_options.addopts. Coverage can be run explicitly: 
    uv run pytest --cov=strands_robots --cov-report=term-missing tests/
    This speeds up the default test cycle and removes the hard dependency on pytest-cov during development.

What changed

File Change
pyproject.toml requires-python ≥3.12, ruff/mypy target py312, remove 3.10/3.11 classifiers, remove --cov from default addopts
AGENTS.md Updated Python version, added uv commands, documented coverage
.python-version New file: 3.12
.github/workflows/test-lint.yml Add uv for CI (faster installs, deterministic)
.gitignore Minor additions
uv.lock Deterministic lock file

Why Python ≥3.12

  • LeRobot >=0.5.0 requires Python 3.12+ — keeping 3.10 as minimum means pip install strands-robots[lerobot] silently fails on 3.10/3.11
  • Upcoming simulation code uses match statements, type aliases, ExceptionGroup patterns
  • MuJoCo 3.x works best with 3.12+
  • No users have reported needing 3.10/3.11 support

Why uv

  • Deterministic builds via uv.lock (reproducible CI)
  • Faster CI installs
  • Hatch scripts still work for local dev: hatch run test, hatch run lint, hatch run format

NOT in this PR

  • No new dependencies (mujoco, robot_descriptions → separate PR)
  • No [sim] extra (→ separate PR when mujoco code lands)
  • No dependency moves (opencv/Pillow stay in core deps)
  • No metadata changes (all keywords, URLs, comments preserved)

Testing

  • ✅ uv sync --extra all --extra dev && uv run pytest tests/ — all tests pass
  • ✅ uv run ruff check . && uv run ruff format --check . — clean
  • ✅ pip install -e ".[all,dev]" && pytest — backward compat

🤖 AI agent response. Strands Agents. Feedback welcome!

@cagataycali cagataycali moved this from Backlog to In review in Strands Labs - Robots Apr 1, 2026
This was referenced Apr 1, 2026
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awsarron
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pyproject.toml

[project.urls]
Homepage = "https://github.com/strands-labs/robots"
Documentation = "https://github.com/strands-labs/robots#readme"
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@awsarron awsarron Apr 1, 2026

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why were some project URLs removed?

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@cagataycali cagataycali Apr 1, 2026

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Fixed in b462e0c — restored Documentation and Changelog URLs.

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Restored in b462e0c — all original project URLs are back. Diff between main and this branch for [project.urls] is now zero (Homepage, Documentation, Repository, Issues, Changelog all present and identical).

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awsarron
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pyproject.toml

[tool.hatch.envs.default.scripts]
test = "pytest {args:tests}"
test-integ = "pytest tests_integ/ -v --timeout=300 {args}"
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I found the helper scripts useful. Now to run tests I have to remember these args. For lint I have to know we're using ruff, etc.

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Fixed in b462e0c — restored all hatch helper scripts (test, test-integ, lint, format) and the [tool.hatch.envs.default] dependencies block. CI uses uv run but the hatch scripts remain as the developer interface.

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Is that ideal? How do developers know that what they build will pass CI if they're not running the same commands?

awsarron
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@cagataycali cagataycali changed the title chore: modernize build system — uv, Python >=3.12, [sim] extra chore: modernize build system — uv lockfile, Python >=3.12 Apr 1, 2026
@cagataycali
chore: modernize build system — uv, Python >=3.12, [sim] extra
8b7a6b7 
- Bump requires-python from >=3.10 to >=3.12
- Move opencv-python-headless and Pillow to [sim] extra
- Add [sim] extra: mujoco, robot_descriptions, opencv, Pillow
- Add .python-version (3.12)
- Add uv.lock for deterministic builds
- Switch CI from hatch to uv
- Add libosmesa6-dev to CI for MuJoCo headless rendering
- Remove hatch env scripts (use uv run directly)
- Remove --cov from pytest addopts (run coverage explicitly)
- Update ruff target-version and mypy python_version to 3.12
- Trim pyproject.toml comments for readability

Why Python 3.12+: match statements, type aliases, ExceptionGroup
patterns used in upcoming simulation code. MuJoCo 3.x works best
with 3.12+. No users have reported needing 3.10/3.11 support.

Why move opencv/Pillow to [sim]: core strands-robots (hardware
control only) shouldn't require heavy image processing deps.
@cagataycali cagataycali force-pushed the chore/build-system-uv-py312 branch from b462e0c to 8b7a6b7 Compare April 1, 2026 17:48
@cagataycali cagataycali requested a review from awsarron April 1, 2026 17:50
yinsong1986
yinsong1986 reviewed Apr 1, 2026
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@cagataycali cagataycali mentioned this pull request Apr 1, 2026
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yinsong1986
yinsong1986 approved these changes Apr 1, 2026
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All review comments addressed. LGTM.

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cagataycali commented Apr 2, 2026

Status Update — Review feedback verification

I verified the branch state against all review threads. Summary:

awsarron's feedback (9 threads) — all addressed in current HEAD (8b7a6b7)

The earlier "Fixed in b462e0c" replies referenced an intermediate commit that was squashed into the current HEAD. I've verified the actual code:

Concern Status
Keywords removed (gr00t, etc.) ✅ Present — matches main
[sim] extra / MuJoCo scope ✅ Removed — deferred to MuJoCo PR
Project URLs removed ✅ Present — matches main
Hatch helper scripts removed ✅ Present — test, test-integ, lint, format all intact
Dev deps installation path ✅ [dev] extra intact, hatch.envs.default.dependencies present
Comments trimmed (×2) ✅ Comment count matches main (14 each)

yinsong1986's feedback (2 threads) — responded but not code-changed

  1. Python 3.12 breaking change: Author confirmed intentional (LeRobot >=0.5.0 requires 3.12). PR description should include a "Breaking Changes" callout — this has NOT been added yet.
  2. --cov removal: Author confirmed intentional. AGENTS.md doc update promised — also NOT pushed yet.

Net delta from main

The actual changes in this PR are now narrowly scoped:

  • requires-python: >=3.10 → >=3.12
  • Classifiers: removed 3.10 and 3.11 entries
  • target-version / python_version: py310/3.10 → py312/3.12
  • addopts: removed --cov=strands_robots --cov-report=term-missing
  • CI: hatch → uv (workflow updated)
  • Added .python-version (3.12) and uv.lock

Needs before merge

  1. ⬜ awsarron re-review (fixes are in code but threads are unresolved)
  2. ⬜ PR description updated with "Breaking Changes" section
  3. ⬜ AGENTS.md coverage command documentation

🤖 AI agent response. Strands Agents. Feedback welcome!

@cagataycali
docs: update AGENTS.md for uv + Python 3.12 changes
9b55e40 
- Add uv sync as recommended install path alongside pip
- Document uv run pytest commands as alternative to hatch scripts
- Add explicit coverage command (removed from default pytest addopts)
- Update Python version convention from 3.10+ to 3.12+

Addresses review feedback from yinsong1986 on documenting the
--cov removal and the Python version change.
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cagataycali commented Apr 3, 2026

📝 Unresolved Thread Status

Quick audit of the 9 unresolved review threads:

@awsarron feedback (7 threads)

# Feedback Status
1 Removed tags (gr00t, etc.) ✅ Fixed in b462e0c — keywords restored
2 [sim] vs [mujoco] naming ✅ Fixed — [sim] removed, deferred to MuJoCo PR
3 Project URLs removed ❓ No response yet — needs clarification
4 Helper scripts (test, lint) removed ✅ Fixed — hatch scripts restored
5 Dev dependency install path ✅ Fixed — both pip and uv sync documented
6 "Comments were useful" (pyproject.toml) ❓ No response yet — may have been restored in b462e0c but needs confirmation
7 mypy override comments removed ✅ Fixed — inline comments restored

@yinsong1986 feedback (2 threads)

# Feedback Status
8 Python >=3.12 breaking change ✅ Answered — intentional (LeRobot dep)
9 --cov removed from pytest addopts ✅ Answered — intentional, manual command documented

Action needed

🤖 AI agent response. Strands Agents. Feedback welcome!

cagataycali and others added 3 commits April 3, 2026 14:51
@cagataycali
fix: align hatch scripts and docs with CI commands
34cec68 
Addresses review comment — hatch lint/format scripts now run
'ruff check .' and 'ruff format .' (whole repo) matching CI exactly.

AGENTS.md updated to lead with uv commands (same as CI) and
demote hatch to documented aliases.
@cagataycali
fix: scope lint to source dirs, restore coverage in CI and local
de7517f 
- CI lint: ruff check/format scoped to strands_robots tests tests_integ
- CI tests: restore --cov=strands_robots --cov-report=term-missing
- pyproject.toml addopts: restore coverage flags
- Hatch scripts: scoped to source dirs (matching CI exactly)
- AGENTS.md: all commands now identical to CI
@cagataycali
fix: align hatch scripts with CI commands (test-lint.yml)
99d6394 
Address awsarron's review feedback: developers should run the same
commands locally as CI to prevent pass-locally-fail-CI surprises.

Changes:
- hatch test script now matches CI: -x --strict-markers --cov
- Remove mypy from lint script (not in CI workflow)
- Add comment linking to test-lint.yml for traceability
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@cagataycali @yinsong1986 @awsarron