The six oversized src/main/ipc modules each carried a file-level
`eslint-disable max-lines` and ran 427-671 counted lines against a 300-line
budget. AGENTS.md calls for splitting rather than suppressing, and
config/max-lines-baseline.txt is a shrink-only ratchet, so this removes all six
suppressions and prunes their entries (341 -> 335).
Pure move, no behavior change. Each file is cut along the seams it already had:
pet splits into format allowlist / storage paths / symlink-safe copy / bundle
manifest + import; filesystem-auth into path-containment primitives, the
config-derived allow-list, and the git-registered root cache; notifications into
sound selection, native lifecycle, permission probe, and burst cooldown;
crash-reporting into renderer error reports, breadcrumbs, and sender.
The IPC surface is proved intact rather than assumed: comparing (method,
channel) multisets between HEAD and the split gives 49 registrations across 49
distinct channels on both sides. filesystem-auth's security boundary keeps its
acyclic layering -- containment primitives, then allow-list, then root cache,
then path-resolution orchestration -- with no layer gaining a back-edge.
Also keeps clipboard-ipc-handlers.test.ts under the 800-line test budget. The
split had briefly added a redundant vi.mock for isENOENT (byte-identical to the
real implementation) that pushed it to 801; the mock is dropped in favor of the
real function, with realpath added to the existing node:fs/promises mock.
Verified: oxlint clean, ratchet passes, typecheck clean, full unit suite green
(the one remaining failure is a pre-existing load flake in an untouched file,
green when re-run serially), no new runtime import cycles among 617 modules,
and no lint suppression added anywhere.
