[LazyGreed]

Summary

• Preserved explicitly empty Antigravity structured tool results instead of substituting an empty-string fallback.
• Added adapter conformance regressions for empty content objects, structured_content-only objects, empty JSON parts, and absent-content fallback.

Verification

• cargo test -p kinetix-plugin-antigravity-oauth shared_adapter_conformance_fixtures -- --nocapture
• cargo fmt --all -- --check
• git diff --check
• cargo test --workspace
• cargo check --locked --workspace --target wasm32-unknown-unknown
• KINETIX_DIR=/home/k/Projects/kinetix scripts/run-ci.sh
• scripts/test_adapter_component_runtime.sh
• python3 scripts/validate_response_contract.py
• KINETIX_DIR=/home/k/Projects/kinetix python3 scripts/sync_host_contract.py --check

Issues

Closes #81

[LazyGreed]

Review

Reviewed full commit range. No blocking findings. Prior empty-JSON finding resolved; reported product-facing changes match Git. Checkout unchanged.

Verification

• kinetix-plugins: cargo test --workspace (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: cargo fmt --all -- --check (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: git diff --check 2a7209aa344e11db1e052d3e9cf039d8544665be 1823ba6720e746e8bd1d38a746342e675ff3a9ff (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: cargo check --locked --workspace --target wasm32-unknown-unknown (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: scripts/test_adapter_component_runtime.sh (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: python3 scripts/validate_response_contract.py (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: KINETIX_DIR=/home/k/Projects/kinetix python3 scripts/sync_host_contract.py --check (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)
• kinetix-plugins: git status --porcelain; test "$(git rev-parse HEAD)" = 1823ba6720e746e8bd1d38a746342e675ff3a9ff; git diff --quiet; git diff --cached --quiet (cwd /home/k/merro/.wt/kinetix-plugins/issue-81-provider-compatibility-hardening)

Non-blocking findings and notes

• None.