fix(providers): declare bedrock + vertex extras and add provider import-error hints

[Rome-1]

Fixes #574
Fixes #573

The Bedrock and Vertex AI provider docs already instruct users to run pipx install "strix-agent[bedrock]" / strix-agent[vertex], but pyproject.toml never declared a [project.optional-dependencies] table — so those extras don't exist and the install silently omits boto3 / google-auth. Starting a scan then crashes at LLM warm-up with ImportError: Missing boto3 to call bedrock (#574) or No module named 'google' (#573). This PR adds bedrock = ["boto3>=1.28.0"] and vertex = ["google-auth>=2.0.0"] so the documented install commands actually pull the provider SDKs, adds the previously-missing ## Installation section to docs/llm-providers/bedrock.mdx (mirroring vertex.mdx), and introduces a pure _provider_import_hint() helper that maps a missing-provider ImportError back to the matching pip install "strix-agent[...]" hint in the warm-up error panel. The change is purely additive — no existing behavior is altered.

Testing

• pytest tests/test_optional_deps.py tests/test_provider_hints.py — 6 passed. The first tomllib-parses pyproject.toml and asserts both extras pin google-auth / boto3; the second unit-tests _provider_import_hint (bedrock+boto3 and vertex+google-auth return a pip install hint; ConnectionError and openai/gpt-4 return None). Both files fail without the source change (KeyError on the missing extras table; ImportError importing the missing helper).
• ruff check + ruff format --check — clean on all changed files.
• pyupgrade --py312-plus — no rewrites.
• bandit — clean on strix/interface/main.py (only B101 assert-in-tests notices in the test files).
• Note: the repo's pinned pre-commit mypy hook crashes with an internal error on the bundled openai SDK on main as well, so mypy was not run as a gate here.

[greptile-apps]

Greptile Summary

This PR fixes the root cause of two reported crashes (#573, #574) by adding the previously missing [project.optional-dependencies] table to pyproject.toml, so pipx install "strix-agent[bedrock]" and strix-agent[vertex] now actually pull their provider SDKs. It also adds a _provider_import_hint() helper that maps a missing-provider ImportError back to the matching install command in the warm-up error panel, and fills in the missing ## Installation section in bedrock.mdx.

• pyproject.toml: Adds bedrock = ["boto3>=1.28.0"] and vertex = ["google-auth>=2.0.0"] optional extras; lock file updated accordingly with full transitive closure.
• strix/interface/main.py: Introduces _provider_import_hint() and wires it into the warm_up_llm error panel; raw_model is initialised before the try block so the model name is always available in the except handler.
• Tests: Two new test files verify the extras are declared in pyproject.toml and exercise all matching branches of the hint helper.

Confidence Score: 4/5

The core fix is correct and additive; the only concern is a cosmetic mismatch between the runtime hint and the documented install method.

The pyproject.toml fix is straightforward and directly resolves the reported crashes. The _provider_import_hint helper is well-tested and purely additive. The hint strings say pip install while the docs consistently use pipx install — a user who installed via pipx would be pointed to the wrong tool when trying to fix the missing extra.

The two hint strings in strix/interface/main.py (lines 230 and 232) should be updated to match the pipx install command used in the documentation.

Important Files Changed

Filename	Overview
pyproject.toml	Adds the missing [project.optional-dependencies] table with correct bedrock (boto3>=1.28.0) and vertex (google-auth>=2.0.0) extras, resolving the root cause of the bugs.
strix/interface/main.py	Adds _provider_import_hint() helper and wires it into the warm_up_llm error panel; hint strings say "pip install" while the docs consistently use "pipx install".
docs/llm-providers/bedrock.mdx	Adds the previously missing Installation section, correctly mirroring the vertex.mdx pattern with the pipx install command.
tests/test_optional_deps.py	New test file that parses pyproject.toml via tomllib and asserts both extras are present; straightforward and correct.
tests/test_provider_hints.py	New test file covering all four hint-matching branches of _provider_import_hint(); covers both positive and negative cases cleanly.
uv.lock	Lock file updated to include boto3, botocore, google-auth, and their transitive dependencies as expected for the new optional extras.

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 1
strix/interface/main.py:229-232
The install command in the hint says `pip install` but the docs (and the new `bedrock.mdx` Installation section) consistently tell users to use `pipx install "strix-agent[bedrock]"`. A user who installed via pipx cannot fix the missing extra with `pip install` — that would land the package in the wrong environment. The hint should mirror the documented install command, or at minimum use `pipx inject strix-agent` which is the canonical way to add extras to a pipx-managed tool.

```suggestion
    if "boto3" in message and model_name.startswith("bedrock/"):
        return 'Bedrock support is optional. Install it with: pipx install "strix-agent[bedrock]"'
    if "google" in message and "vertex" in model_name:
        return 'Vertex AI support is optional. Install it with: pipx install "strix-agent[vertex]"'
```

_{Reviews (1): Last reviewed commit: "feat: add bedrock + vertex optional extr..." | Re-trigger Greptile}

[greptile-apps]

The install command in the hint says pip install but the docs (and the new bedrock.mdx Installation section) consistently tell users to use pipx install "strix-agent[bedrock]". A user who installed via pipx cannot fix the missing extra with pip install — that would land the package in the wrong environment. The hint should mirror the documented install command, or at minimum use pipx inject strix-agent which is the canonical way to add extras to a pipx-managed tool.

Suggested change

	if "boto3" in message and model_name.startswith("bedrock/"):
	return 'Bedrock support is optional. Install it with: pip install "strix-agent[bedrock]"'
	if "google" in message and "vertex" in model_name:
	return 'Vertex AI support is optional. Install it with: pip install "strix-agent[vertex]"'
	if "boto3" in message and model_name.startswith("bedrock/"):
	return 'Bedrock support is optional. Install it with: pipx install "strix-agent[bedrock]"'
	if "google" in message and "vertex" in model_name:
	return 'Vertex AI support is optional. Install it with: pipx install "strix-agent[vertex]"'

Prompt To Fix With AI

This is a comment left during a code review.
Path: strix/interface/main.py
Line: 229-232

Comment:
The install command in the hint says `pip install` but the docs (and the new `bedrock.mdx` Installation section) consistently tell users to use `pipx install "strix-agent[bedrock]"`. A user who installed via pipx cannot fix the missing extra with `pip install` — that would land the package in the wrong environment. The hint should mirror the documented install command, or at minimum use `pipx inject strix-agent` which is the canonical way to add extras to a pipx-managed tool.

```suggestion
    if "boto3" in message and model_name.startswith("bedrock/"):
        return 'Bedrock support is optional. Install it with: pipx install "strix-agent[bedrock]"'
    if "google" in message and "vertex" in model_name:
        return 'Vertex AI support is optional. Install it with: pipx install "strix-agent[vertex]"'
```

How can I resolve this? If you propose a fix, please make it concise.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

[Rome-1]

Good catch — switched both hints to pipx install "strix-agent[bedrock]" / [vertex] to match the docs, and updated the test assertion. Pushed.