Route moq-boy status and command tracks through moq-json

[kixelated]

Summary

moq-boy hand-rolled its JSON tracks: the Rust side serialized the status struct, deduped against the last string, and appended a one-frame group per change; the JS side read raw frames and wrote raw command JSON. This PR routes both JSON tracks through the existing snapshot/delta helper (moq-json / @moq/json), the same one the hang catalog already uses.

• Status track (Rust publishes → JS consumes): StatusPublisher now wraps moq_json::Producer<Status>, dropping the manual serialize / last_json dedupe / append_group logic. The JS viewer reads it with Json.Consumer, reusing the existing GameStatusSchema for validation instead of a separate safeParse.
• Command track (JS publishes → Rust consumes): each viewer's command track is written via a per-track Json.Producer and read with moq_json::Consumer<RawCommand>, so snapshots and RFC 7396 merge-patch deltas are reconstructed into a full command before dispatch.

The status track now gets merge-patch deltas (delta ratio left at the default 8): its per-frame stats and latency change incrementally, so deltas are a clear win, while unchanged values are still skipped. Malformed-command and invalid-status handling stays lenient (warn and continue); a real track error still ends the stream. serde_json is no longer a direct dependency of moq-boy.

Both ends of each track ship together, so the wire-format shift (snapshot-per-group → snapshot+deltas) is internal to moq-boy.

Test plan

• cargo build -p moq-boy and cargo clippy -p moq-boy clean
• bun run check (tsc) passes for js/moq-boy
• Biome clean on js/moq-boy/src/index.ts
• Manual: run moq-boy + web viewer, confirm status (buttons/latency/stats) renders and button/reset input still controls the emulator

(Written by Claude)

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Generated by Claude Code

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ed36d6e9-0809-4b72-b8e9-25f249b7f7cb

📥 Commits

Reviewing files that changed from the base of the PR and between 36c9625 and 31fe90c.

⛔ Files ignored due to path filters (2)

• Cargo.lock is excluded by !**/*.lock
• bun.lock is excluded by !**/*.lock

📒 Files selected for processing (5)

• js/moq-boy/package.json
• js/moq-boy/src/index.ts
• rs/moq-boy/Cargo.toml
• rs/moq-boy/src/input.rs
• rs/moq-boy/src/status.rs

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Walkthrough

Both the Rust (rs/moq-boy) and JavaScript (js/moq-boy) implementations of moq-boy are refactored to use a shared moq-json / @moq/json library for JSON serialization and deserialization. The respective manifests add the new dependency (and remove serde_json from the Rust side). In Rust, StatusPublisher now holds a moq_json::Producer<Status> and calls producer.update(status) directly, while handle_viewer_commands uses a moq_json::Consumer<RawCommand> stream instead of manual frame/UTF-8/serde parsing. In TypeScript, #runStatus switches to Json.Consumer with schema validation and #runCommandTrack uses Json.Producer for emitting command updates.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: routing moq-boy status and command tracks through the moq-json library instead of hand-rolled JSON handling.
Description check	✅ Passed	The description is comprehensive and directly related to the changeset, detailing the refactoring of JSON handling for both status and command tracks using moq-json.
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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✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch claude/moq-boy-moq-json-20wsze

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