delegation-and-review §2: scope a sweep by every generator, not one grep pattern

[firaen22]

What

delegation-and-review §2 (The dispatch packet): scope a find-and-fix-every-
instance sweep by every surface that can generate the target pattern, not by
one search pattern.

Why

Private incident: a 53-file styling-token sweep, three review rounds, and a
merged fix all missed the actual defect — it lived in a shared global utility
class the token grep pattern never touched. Each follow-up round's "still
broken?" re-ask surfaced a different category (a color-tier band, a
class-emitting helper function) that the prior round's search pattern
structurally excluded — the sweep converged only by exhausting the user's
patience for re-asking, not by a scope definition that covered the space up
front.

Rule

(this Rule summary tracks the current diff; original filing in edit history)

• Branch first: textual invariant (string absence from an explicitly named corpus = the packet's readable scope) -> the scoped search IS the gate, claiming corpus-level absence only. Behavioral target -> generator SEARCH scope hunted per §3's miss-is-costly loop (finders quoted verbatim) with at least one producer/effect axis mandatory before closure; per-round query/result ledger in the packet; searching stays inside the packet's readable scope.
• Value family closed only by a verified-finite source (sealed enum/const union at file:line), else bounded; unclosable producer surfaces or variation axes -> non-exhaustive outcome; every-instance claims with unobserved members are false. WRITE scope stays the owned files; outside generators reported, never edited.
• Proof gate (behavioral): observed effect per inventoried surface across declared variation axes, in a side-effect-contained harness with per-invocation authorization at fire time; equivalence classes need verified equivalence including the producing implementation; unobserved = reported unverified.

Ships unprobed per the README covenant.

Checks

• python3 .github/checks.py — all pass.
• Diff (as restructured across review rounds — see trail comment): §2 scope +
  proof-gate amendments, one §3 cross-reference line, one Provenance paragraph.