th-ef78d0: add the missing changeset for the interaction-ordering fix

[brentrager]

Follow-up to #520, which landed the Rich Interaction ordering fix (interaction_required before the raise tool's toolCall chunk, in Go / TypeScript / Python / .NET) but carried no changeset — so the fix would version and publish nowhere.

What this adds

1. The changeset. @smooai/smooth-operator: patch, describing the fix, the ruling behind it, and the mechanism each port reused.

2. The divergence note, refreshed. spec/conformance/scenarios/README.md still documented the divergence as live — "Park event vs. the raise tool's stream_chunk — Rust is 1 of 5, and Rust is right" — and interaction-park-resume's own description still told readers "Go / TypeScript / Python / .NET emit the chunk first." Both now record it as FIXED, in the same struck-through style the corpus already uses for the cancel divergence, and note that every port reused its own write-confirmation mechanism rather than inventing a second one: suppress the chunk in the engine stream loop on a tool-name predicate, re-emit it from the park path after the park event.

3. Formatting restored. interaction-choices-park-resume.json had been rewritten by a JSON re-serializer (2-space indent, — escapes), turning a two-line change into a 152-line diff and diverging from the corpus's formatting. Restored to the corpus style with the marker and reason intact.

Scenario matrix

All five servers pass all 18 scenarios, with one tracked exception:

scenario	rust	go	ts	python	dotnet
interaction-park-resume	✅	✅	✅	✅	✅
interaction-declined	✅	✅	✅	✅	✅
interaction-invalid-retryable	✅	✅	✅	✅	✅
interaction-stale-id-rejected	✅	✅	✅	✅	✅
interaction-conversational-fallback	✅	✅	✅	✅	✅
interaction-choices-park-resume	✅	⚠️ marked	✅	✅	✅
other 12	✅	✅	✅	✅	✅

knownDivergences is now gone from four of the five interaction scenarios. The fifth keeps ["go"], re-pointed at a different bug — this is the marker contract working as intended, not the original divergence surviving.

The second bug, uncovered by the first

Fixing the order let interaction-choices-park-resume run past step 2 for the first time, and it still fails on Go — for an unrelated reason. splitIntoChunks in smooth-operator-core Go (go/core/llm_provider.go) slices the mock reply by bytes:

size := (len(s) + parts - 1) / parts // ceil
out = append(out, s[i:end])

"Pro it is — pulling that quote up." is 36 bytes; 3 parts puts a boundary at byte 12, mid-em-dash (bytes 10–12). Each fragment is invalid UTF-8 and arrives as U+FFFD — the accumulated token is "Pro it is ��� pulling that quote up.". interaction-park-resume's reply is 33 bytes and its boundaries miss the rune, which is exactly why only this one scenario trips. Fix is one line upstream (slice []rune) plus a core release; it is not a protocol divergence and not a reason to weaken the scenario.

Verification

• Go: full go/server suite green (18/18 scenarios; choices correctly tolerated with the new reason). Two failures seen mid-session (TestCancelMidTurnAbortsAndEmitsCancelled, one TestScenarioParity blip) did not reproduce across four subsequent runs and occurred at load average 30–47 on 12 cores — load-induced, and this branch touches no Go code.
• TypeScript: 385 passed / 0 failed. Python: 387 passed. .NET: 405 + 101 passed / 0 failed.
• .NET's pass was confirmed with a control — temporarily re-adding "dotnet" to a marker made the runner fail with remove dotnet from knownDivergences … it now passes, proving the scenario genuinely runs and passes rather than being silently skipped.
• Rust is untouched; it was never listed in any marker, so removing marker entries cannot change its behavior.

[changeset-bot]

🦋 Changeset detected

Latest commit: b5886f9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@smooai/smooth-operator	Patch
@smooai/smooth-operator-web-chat-example	Patch

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