[yaythomas]

Issue #, if available

Release preparation for core 3.0.

Description of changes

• Testing 1.3.0 → 1.4.0. It now requires core 3.0.0 and reads the operation subtype as a string (feat(sdk): custom subtypes typed str #837). The published 1.3.0 cannot load a custom subtype.
• Telemetry exporter 0.0.1 → 0.0.2. The published 0.0.1 uses the core 2 plugin contract and cannot run on core 3.
• The telemetry conformance package pins the exporter exactly, so its pin moves to 0.0.2. Same convention refactor(plugin): create one plugin instance per invocation #737 used for the OTel conformance pin.

An earlier revision also set skip-existing: true on the PyPI publish step. Removed: with these bumps every package in the release matrix is a new version, so the flag changes nothing for this release. Hatch builds are reproducible and PyPI accepts a byte-identical re-upload with 200, so the only case the flag would change is a package whose code changed without a version bump, where the current 400 is a useful signal. Idempotent publishing stays with #716.

Design

See Rules for every change.

• Design note (rule 3): not needed. No logic or public API change.
• Simpler options considered (rule 2): none, the change adds no logic.
• Root cause (rule 5): not a bug fix.
• Net change in source lines and in public API members: +3/-3 lines, 0 API members.

Assumptions

None about the service, Lambda, the runtime or another library.

Decisions not covered by the issue or the design note

• Testing stays on 1.x (team decision). The core floor jump to >=3.0.0 and the Operation.sub_type type change go in its release notes.

Checklist

• Every new branch has a test that fails without it (rule 4): no new branches.
• For a bug fix: the first commit adds a test that fails on the current code (rule 5): not a bug fix.
• Every edited test expectation is listed in the description, with the reason (rule 5): none edited.

Validation

• Exporter metadata tests: 3 passed. OTel metadata tests: 10 passed.
• hatch build produces aws_durable_execution_sdk_python_testing-1.4.0 and aws_durable_execution_sdk_python_telemetry_exporter-0.0.2 wheels and sdists.
• The intended tag sdk-v3.0.0,otel-v2.0.0,testing-v1.4.0,telemetry-exporter-v0.0.2 parses to testing 1.4.0 in parse_testing_version.py and to SDK 3.0.0 in resolve_layer_sdk_version.py.
• No test or script asserts the previous versions.

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[github-actions]

Codex AI review

No actionable findings. The version bumps and telemetry conformance dependency pin are consistent. Residual test risk: builds, installation, and tests were not executed under the read-only review constraints.

Reviewed commit 4fa64465fd5023cf833b7d30a80d3b686df9897b. Workflow run