What Problem This Solves

Internal core helpers remained exported even though no code outside their defining modules referenced them. Those unnecessary exports expand module APIs and make dead-code analysis less precise.

Why This Change Was Made

Localize 99 functions across 79 core modules after a fresh codebase-memory graph index and repository-wide reference audit.

Each changed symbol:

• still has at least one local caller
• has zero external JavaScript or TypeScript references
• is not exposed through a wildcard re-export
• is not part of a package entry surface

The formatter also compacted ten declarations, leaving the production diff at net -10 lines.

User Impact

None. Runtime behavior is unchanged; this only narrows internal module surfaces.

Evidence

• codebase-memory graph: 21,039 files, 281,257 nodes, 1,133,831 edges, zero extraction errors
• exact committed-state audit: 99 private functions across 79 files, local callers, zero external code references
• git diff --check
• Testbox tbx_01kwz049syz11bmqsfhw9gx148: pnpm check:changed passed
• 31 direct non-gateway test files: 419 tests passed across 10 Vitest shards
• 9 direct gateway test files: 1,007 tests passed across 23 project files
• src/gateway/model-pricing-cache.test.ts: 75 tests passed twice in isolated reruns
• broad pnpm test:changed completed its earlier shards but the gateway shard hit the repository's 15-minute no-output retry path; the retry exposed one project-order-sensitive pricing-cache assertion and then repeated the teardown stall. The affected test passed twice in isolation.
• autoreview local: clean, confidence 0.93
• autoreview branch: clean, confidence 0.82

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