fix(writer): accept writer-sdk 3.x in the dependency check

[Anai-Guo]

Same class of problem as #4409, in a different package.

Problem

opentelemetry-instrumentation-writer declares

_instruments = ("writer-sdk >= 2.2.1, < 3",)

BaseInstrumentor.instrument() compares that against the installed distribution and, on a mismatch, logs a DependencyConflict and returns without wrapping anything. writer-sdk 3.0.0 shipped on 2026-06-02, so on a current SDK you get

DependencyConflict: requested: "writer-sdk >= 2.2.1, < 3" but found: "writer-sdk 3.0.0"

and then silently no spans and no metrics.

Nothing the instrumentation reaches for moved in 3.x — all four wrap targets still resolve:

target	writer-sdk 3.0.0
writerai.resources.chat.ChatResource.chat	present
writerai.resources.chat.AsyncChatResource.chat	present
writerai.resources.completions.CompletionsResource.create	present
writerai.resources.completions.AsyncCompletionsResource.create	present

Change

One line: < 3 → < 4.

Verification

Package test suite run against writer-sdk==3.0.0, before and after:

	result
before (< 3)	76 failed — no spans at all, so every assertion trips (IndexError on the span list, AttributeError: 'NoneType' in the metrics tests)
after (< 4)	76 passed

The recorded cassettes replay unchanged under 3.x.

Note on CI

The test group stays pinned at writer-sdk>=2.3.0,<3, so uv.lock is untouched and CI keeps testing the version it tests today (where this change is a no-op). Glad to bump the test pin too if you'd prefer CI to cover 3.x — the suite is green there, as above.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Expanded compatibility to support writer-sdk versions 3.x while retaining support for existing 2.x versions.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The writer instrumentation package extends its supported writer-sdk dependency range from >= 2.2.1, < 3 to >= 2.2.1, < 4.

Changes

Writer SDK Compatibility

Layer / File(s)	Summary
Update writer-sdk version range packages/opentelemetry-instrumentation-writer/opentelemetry/instrumentation/writer/__init__.py	The supported writer-sdk upper bound changes from < 3 to < 4.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the change to support writer-sdk 3.x.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In
`@packages/opentelemetry-instrumentation-writer/opentelemetry/instrumentation/writer/__init__.py`:
- Line 40: Update the package dependency declaration in pyproject.toml
associated with the writer instrumentation to allow writer-sdk versions from
2.3.0 up to, but not including, 4. Keep any test-only constraint below version 3
separate if needed, and leave the _instruments declaration unchanged.

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Fix all unresolved CodeRabbit comments on this PR:

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ℹ️ Review info

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Run ID: 56203a18-c411-4cdf-98fb-81900f5b7682

📥 Commits

Reviewing files that changed from the base of the PR and between 62e24c2 and a8bc839.

📒 Files selected for processing (1)

• packages/opentelemetry-instrumentation-writer/opentelemetry/instrumentation/writer/__init__.py

[coderabbitai]

🗄️ Data Integrity & Integration | 🟠 Major | ⚡ Quick win

Update the package dependency metadata to allow writer-sdk 3.x.

Line 40 allows writer-sdk versions below 4, but packages/opentelemetry-instrumentation-writer/pyproject.toml:43 still declares writer-sdk>=2.3.0,<3. A standard resolver can therefore reject or downgrade writer-sdk==3.0.0 before BaseInstrumentor.instrument() runs. Change the package dependency upper bound to <4, while keeping any test-only <3 constraint separate if required.

Proposed metadata change

- "writer-sdk>=2.3.0,<3",
+ "writer-sdk>=2.3.0,<4",

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In
`@packages/opentelemetry-instrumentation-writer/opentelemetry/instrumentation/writer/__init__.py`
at line 40, Update the package dependency declaration in pyproject.toml
associated with the writer instrumentation to allow writer-sdk versions from
2.3.0 up to, but not including, 4. Keep any test-only constraint below version 3
separate if needed, and leave the _instruments declaration unchanged.