fix(deps): bundle boto3 in release binaries and unbreak Bedrock tool_choice

[pavel-brousek-at-usu]

Summary

• uv sync --frozen --extra bedrock in the release build so standalone binaries actually bundle boto3. The bedrock extra was added by fix(providers): declare bedrock + vertex extras and add provider import-error hints #588 but the release workflow only ever ran plain uv sync --frozen, so it was never selected — every Bedrock user on a downloaded binary hits ModuleNotFoundError: No module named 'boto3' at LLM warm-up with no way to pip install into a frozen executable (closes [BUG] ImportError: Missing boto3 to call bedrock. Run 'pip install boto3'. #574, which was closed by fix(providers): declare bedrock + vertex extras and add provider import-error hints #588 without actually fixing the binary-distribution path).
• Bump the litellm floor to >=1.95.0. Versions below that map Bedrock's parallel_tool_calls to a tool_choice object missing the required type discriminator, so every Bedrock Claude request 400s with tool_choice.type: Field required before the agent can even start ([BUG] When using Bedrock and Claude fails to start with tool_choice.type: Field required #644). The fix landed upstream in BerriAI/litellm#34347, first released in litellm 1.95.0 — no strix-side patch needed, just a version floor.

Related

• Closes [BUG] ImportError: Missing boto3 to call bedrock. Run 'pip install boto3'. #574 (ModuleNotFoundError: No module named 'boto3') for the standalone-binary install path specifically; fix(providers): declare bedrock + vertex extras and add provider import-error hints #588 fixed it for pip install "strix-agent[bedrock]" but not for strix -linux-x86_64 etc.
• Related to [BUG] When using Bedrock and Claude fails to start with tool_choice.type: Field required #644 and the two open community PRs that also target the tool_choice crash (Fix Bedrock/Claude startup crash from forced parallel_tool_calls (#644) + ruff lint cleanup #649, fix(core): ensure tool_choice maps to structured object for AWS Bedrock compliance #668) — those work around it by having strix omit parallel_tool_calls/tool_choice for Bedrock-Claude. This PR takes the alternative fix of pulling in the litellm version that already handles it correctly upstream, so no strix-side Bedrock-detection branch is needed. Either approach fixes the crash; happy to close this in favor of Fix Bedrock/Claude startup crash from forced parallel_tool_calls (#644) + ruff lint cleanup #649/fix(core): ensure tool_choice maps to structured object for AWS Bedrock compliance #668 if you'd rather keep the fix in strix's own code.

Testing

• uv sync --frozen --extra bedrock --python 3.12 installs boto3==1.43.36 and litellm==1.96.0 (the latest release satisfying the new floor at lock time).
• Built the full frozen binary (uv run --no-sync pyinstaller strix.spec --noconfirm) and confirmed via pyi-archive_viewer -l that both litellm-1.96.0.dist-info and boto3/botocore (including botocore/data/bedrock*) are bundled; dist/strix --version / --help run correctly.
• uv run --no-sync pytest tests/ — 883 passed, including two new regression tests (test_release_build_selects_bedrock_extra, test_litellm_pinned_past_bedrock_tool_choice_fix) that fail against the pre-fix workflow/pyproject.toml and pass with the fix.
• ruff check / ruff format --check — clean.

Test plan

• uv sync --frozen --extra bedrock installs boto3
• Frozen binary bundles litellm 1.96.0 and boto3/botocore bedrock data files
• Frozen binary runs (--version, --help)
• Full test suite passes (883 passed)
• New regression tests fail pre-fix, pass post-fix

[greptile-apps]

Greptile Summary

This PR enables the Bedrock optional dependency during release builds and raises the LiteLLM minimum version to include the upstream Bedrock tool-choice fix.

• Selects the bedrock extra when synchronizing release-build dependencies so frozen binaries include boto3.
• Requires LiteLLM 1.95.0 or newer and refreshes the lockfile.
• Adds regression tests for the release workflow and LiteLLM version floor.

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The release workflow, dependency declaration, lockfile, and regression tests consistently implement the intended Bedrock packaging and LiteLLM compatibility fixes.

Important Files Changed

Filename	Overview
.github/workflows/build-release.yml	Selects the Bedrock extra before building release artifacts so boto3 is available to frozen binaries.
pyproject.toml	Raises the LiteLLM dependency floor to the version containing the upstream Bedrock tool-choice fix.
tests/test_optional_deps.py	Adds focused regression checks for Bedrock release dependencies and the LiteLLM minimum version.
uv.lock	Refreshes resolved dependencies consistently with the new LiteLLM floor; no changed-code security issue was established.

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