RETURN-C2: the return specification for stage C2's reviewer

Frozen with the stage file. The dispatch serves it beside the packet C2-reviewer, and the validator's schema is read from it. One reader, one packet, one return.

What you return

One JSON line, then the end marker on a line of its own. Nothing else, before or after.

• agent: your reader id as given to you.
• served: the sha256 of the model file served, copied exactly from the packet's first page (64 lowercase hex characters).
• errors: one object per error you find, each with:
  • kind: exactly one of quote (a quote that does not show what it is said to show), contradiction, count (a count that cannot be right), loop (a loop no room runs the whole way round), order (an arrow whose instance does not show the order claimed);
  • where: the page and the place, such as model-p3-sections.md, A16 or story-p3.md, What sends a room back;
  • what: what is wrong, in one or two sentences, citing the words, ids or numbers. An empty list if you find none.
• partition: your one partition of the third-order themes into fourth-order themes, different from the analyst's in tiers.md. One object per group, each with label (its name), members (the third-order theme ids, T3-NNN, copied from tiers.md) and holds (what holds the members together, in one sentence). Each third-order theme in tiers.md appears in exactly one group or in unplaced.
• unplaced: the third-order themes you leave outside every group, [{"id": "T3-NNN", "why": "one clause"}], or [].
• differs: one or two sentences on how your partition differs from the analyst's, and why yours meets the criterion in tiers.md.

{"agent": "...", "served": "<sha256 of the model file served>", "errors": [{"kind": "quote|contradiction|count|loop|order", "where": "...", "what": "..."}], "partition": [{"label": "...", "members": ["T3-001", "T3-023"], "holds": "..."}], "unplaced": [{"id": "T3-017", "why": "..."}], "differs": "..."}
END-OF-RETURN

A disagreement is never a verdict: your reading decides nothing.

After your line, write the end marker END-OF-RETURN on a line of its own. Confirm that you reached the end of the packet by writing that marker; a return without it is a partial return and is reissued.