Bug

scale-vero's package pyproject.toml (in the repo's vero/ subdir) declares requires-python = ">=3.11", which is too permissive. uv run picks the newest installed interpreter (e.g. Python 3.14). The transitive dependency litellm==1.92.0 (pulled via scale-vero[optimize] → openai-agents[litellm]) has a Rust/PyO3 core that fails to build on Python 3.14.

Exact PyO3 error

error: the configured Python interpreter version (3.14) is newer than PyO3's maximum supported version (3.13)

Repro

On a machine whose default uv-managed Python is 3.14:

git clone git@github.com:scaleapi/vero.git
cd vero/vero
uv run vero harbor run ...

uv resolves to Python 3.14 (satisfies >=3.11), then the litellm build fails with the PyO3 error above. Pinning to 3.12 locally fixes it, confirming the interpreter version is the cause.

Fix

Cap the upper bound so uv cannot select an interpreter that breaks the litellm/PyO3 build:

-requires-python = ">=3.11"
+requires-python = ">=3.11,<3.14"

The repo has no .github/workflows CI matrix to reconcile against; the cap simply matches PyO3's max supported version (3.13). Change is limited to vero/pyproject.toml; nothing else is touched.

🤖 Generated with Claude Code

Greptile Summary

This PR adds an upper-bound Python version cap (<3.14) to vero/pyproject.toml to prevent uv from selecting Python 3.14, which breaks the litellm/PyO3 transitive dependency that only supports up to Python 3.13.

• The one-line change to requires-python in vero/pyproject.toml corrects a too-permissive lower-bound-only constraint, preventing uv from resolving to Python 3.14 where the openai-agents[litellm] extra would fail to build.
• When PyO3 officially adds Python 3.14 support and litellm ships a compatible release, this upper bound will need to be bumped accordingly.

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[uv run / uv sync] --> B{Resolve Python interpreter}
    B -->|Before fix: >=3.11| C[uv picks newest installed\ne.g. Python 3.14]
    B -->|After fix: >=3.11,<3.14| D[uv picks Python 3.11–3.13]
    C --> E[Install openai-agents litellm extra]
    D --> F[Install openai-agents litellm extra]
    E --> G[Build litellm with PyO3]
    F --> H[Build litellm with PyO3]
    G --> I["❌ PyO3 error: Python 3.14 > max supported 3.13"]
    H --> J["✅ Build succeeds"]

_{Reviews (1): Last reviewed commit: "fix: cap requires-python <3.14 so uv can..." | Re-trigger Greptile}