Spec Revision: Notification Service PR

Problem Description

A spec pull request for a real-time notification service (PR #42) has received a batch of review comments and needs to be revised. The PR is on branch claude/spec-042-notifications. The review includes a mix of concrete change requests, a question about ownership, an out-of-scope suggestion, and a schema addition from the top-level review.

The revision should carefully address each comment according to its nature and update the spec accordingly, then document what was done.

The input files are provided under inputs/:

• inputs/SPEC-042-notifications.md — the current spec file
• inputs/review_comments.json — the review comments on the PR (structured data representing what would be fetched from GitHub), including metadata about when the last revise commit was made

Output Specification

Produce the following files in your working directory:

1. SPEC-042-notifications-revised.md — the updated spec with all appropriate changes applied
2. revision_plan.md — a structured document that for each comment states:
   • The comment ID and author
   • The classification (concrete change / question / disagreement / ambiguous / out-of-scope)
   • The action taken or planned
3. pr_comment_summary.md — the text of the top-level PR comment you would post, summarising the round (how many comments addressed, deferred, replied-to; link placeholder; open questions remaining)
4. per_comment_replies.md — the reply text you would post on each individual comment

Work only from the files in inputs/. Do not make up additional context beyond what is provided.