test(mcp): prove tracedecay_god_class behavior

[ScriptedAlchemy]

Summary

• Prove tracedecay_god_class through the production MCP tools/call path, not a handler unit test.
• Assert literal member rankings for a TypeScript class fixture and a Rust struct fixture: order, counts, path scope, default limit, and the omitted-format markdown default.
• JSON object key order is not the ranking. The proof compares the field set and the member counts the tool actually returned.

Motivation

tracedecay_god_class had a line-number check and no assertion of the ranking a caller actually sees. The tool's contract is which classes and structs rank, with which method and field counts, under limit and path.

Changes

• crates/tracedecay/tests/mcp_suite/mcp_handler_test/god_class_test.rs calls the real MCP server.
• Classes with known methods, fields, a constructor, an interface, and a free function pin the ranking. A Rust struct pins field counts and leaves impl methods and an enum out.

Test plan

• REQUIRE_EXACT_TEST_COUNT=2 scripts/require-exact-test.sh cargo test -p tracedecay --test mcp_suite --features test-transport god_class_test -- --test-threads=1 — 2 passed; 0 failed in 3.31s
• Assertions are the observed tool output (member order, counts, path scope, default limit, markdown). JSON key order is not asserted.

Checklist

• No secrets, credentials, or .env files included
• CHANGELOG.md updated — not applicable; test-only
• Breaking changes documented — none

Do not merge from this lane.

  

[changeset-bot]

⚠️ No Changeset found

Latest commit: d72afb6

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, add credits to your account and enable them for code reviews in your settings.