fix(cli): exclude scoped instructions from SWE-Pruner - #12052

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Reviewed the partition() split logic against read.ts's output construction (file vs. directory branches, image/PDF branch, metadata.loaded semantics, and the includeDirectoryFiles expand path) and confirmed the body/tail split is sound: the <system-reminder> block is only ever emitted once, after </content>, and only on the single-file read path that also sets metadata.loaded. The line-numbered content construction makes the marker strings unreachable inside real file content, so the new indexOf-based partitioning won't misfire. The added test exercises the real SwePruner.sweep Effect (via Effect.provideService, not internal mocks) and verifies the skimmer never sees the appended instructions, including a CRLF line-ending edge case. Changeset is present and accurately describes the user-facing behavior. All changes are confined to packages/opencode/src/kilocode/ and packages/opencode/test/kilocode/, so no fork-hygiene concerns.

_{Reviewed by claude-sonnet-5 · Input: 40 · Output: 16.3K · Cached: 1.2M}

_{Review guidance: REVIEW.md from base branch main}