feat: edit says it amends the class it names (greenhouse decisions/0596)

[rodrigoteamx]

edit declares that it amends the class it names (greenhouse decisions/0596, decided by Rod on 2026-10-07). This package runs no gate, so nothing changes here: the session's floor in milpa/app-runtime is who reads it.

Why

implement declares that it creates its named target, so a request that does not name the class is not asked about it; edit selects a class that exists, and is. The record of the lab's houses says what that question fell on: 28 of 34 times, a class the same session had brought into the house a moment before, and never a class the record shows in the house from before the session. Each of those questions ended a leg.

edit now says what it does — it amends, in place, a class that exists — and the floor decides, from the session's own record, whether the class is one the session itself brought, or whether the call repairs a proposal of that session. Everything else is asked as before. edit still never creates a class: only make does.

What it does

• edit carries amendsNamedTarget: true wherever the installed Operation can carry it.
• The declaration is made around the contract, not inside it: it was born in a later milpa/command than the oldest this package runs with, and a named argument the installed Operation does not know is a fatal error when the catalogue is built. Where the contract cannot carry it, edit is declared exactly as before and the floor keeps asking.
• implement keeps saying it creates; nothing else in the package says it amends.

The requirement on milpa/command does not move

It stays >=0.24. Over an older milpa/command this package is what it was; and the one consumer that acts on the declaration, milpa/app-runtime, requires the milpa/command that carries it — so wherever the rule runs, the declaration is made.

How it was checked

• Tests written first and seen red: AnEditAmendsTheClassItNamesTest (4). Over a milpa/command that cannot carry the declaration three of them skip, saying why, and the fourth shows the catalogue is declared all the same.
• Hand mutants: 4 of 4 red (greenhouse scripts/lab/edit-1143/mutants.py devtools).
• 813 tests over milpa/command 0.29.0, none skipped, line coverage 95.58 % (floor 95); PHPStan on both contracts, style, DocBlocks, attribution.
• On fresh cattle, with this branch and the two others laid over the published train (greenhouse evidence/1143).