What Problem This Solves

The shrink-only dead-export baseline still carried 54 Discord entries, including internal types, constants, helper functions, and facade reexports that production code does not consume.

Why This Change Was Made

Privatizes or removes 42 verified dead Discord exports and migrates direct tests through retained production boundaries or canonical SDK owners. Twelve mutable runtime, component-registry, cache-reset, and testing seams remain unchanged because they still represent stateful test or lifecycle boundaries.

The production-mode Knip cascade exposed one additional test-only facade reexport, splitChannelApprovalCapability. Its test now imports the canonical plugin SDK owner and the Discord facade reexport is removed without adding a baseline row.

Baseline delta: +0/-42 entries, 544 to 502 total; Discord 54 to 12. Production source excluding the baseline: +39/-79 lines, net -40.

User Impact

No user-visible Discord or CLI behavior changes. The internal module surface and enforced dead-export ratchet are smaller.

Evidence

• Production Knip regeneration: byte-identical 502-entry baseline; exact deadcode check matched 502.
• Discord suite plus focused repaired reruns: 175 files and 2,119 passing assertions across the final behavior paths.
• Focused approval-native rerun: 14/14.
• Format, type-aware Discord lint, extension types, core types, and test types: green.
• Fresh autoreview: clean at 0.94; cascade follow-up review clean at 0.87.
• Final rebase crossed only disjoint Bonjour, QA Lab, proxy, CLI-test, docs, and generated SDK-hash changes. Fresh Testbox allocation remained queued and was stopped under the requested direct-land override; source patch and baseline count were unchanged.