What Problem This Solves

Production-mode Knip still tracked 20 agent exports that were module-private implementation types, duplicate facade reexports, or test-only parser seams.

Why This Change Was Made

Make same-module types and parsers private. Remove duplicate facade exports while retaining canonical subscription, MCP, plugin-SDK, and Codex web-search contracts. Route JSON/JSONL parser coverage through public parseCliOutput, route compaction coverage through retained planning entry points, and derive the test-only conversation parameter type from the production resolver. Three newly exposed compaction-planning helpers also become module-private so regeneration adds no replacement rows.

User Impact

No runtime, CLI, plugin-SDK, or configuration behavior change. Internal TypeScript surface becomes smaller and canonical ownership is clearer.

Evidence

• Baseline: 1,231 to 1,211, exactly 20 deletions and no additions.
• Production source: +14/-37; tests: +56/-37; baseline metadata: +0/-20.
• Testbox tbx_01kxeydekbbw9cnw94qsghe4nr: 8 files, 140/140 tests green.
• Final production Knip regeneration byte-stable at 1,211; enforced deadcode check, format, scoped typed lint, core types, and core test types green.
• Original whole-wave autoreview clean at 0.98; fresh compaction-cascade review clean at 0.93.
• Repository-wide consumer audit found no dynamic/string/lazy consumers; canonical plugin-SDK MCP and subscription types remain exported from their owner modules.