Require a caller-owned artifact resource scope for source traversal and Git metadata reads. Preserve cancellation, filesystem reasons, partial entries and bytes, and cleanup observations through import and the CLI. Transfer exact failed file owners at regular-file admission and close boundaries, including multiple failures encountered by Git reference resolution.
Validation: 169 focused tests passed across 26 files; two Windows-only cases skipped. Build, typecheck, lint, formatting, knip, architecture guards, discovery and docs checks passed.
BREAKING CHANGE: Reference source readers and imports require an ArtifactResourceScope. VCS metadata reads return Result, and CLI import failures include observed details and partial evidence.
Detach cancelled CDP sessions within the cleanup budget and retain event-finalization failures across retries. Honor Git filesystem encodings and exclude the promise-API probe from source-read failures.
Align existing integration regressions with retained process resources, filesystem-order-independent truncation, owned skill files, explicit native access facts and streamed JSON errors.
Validation: 132 acceptance tests passed (2 skipped), 83 affected boundary tests passed, Git/JSON/CLI boundary regressions passed, check:ci, docs:check and test discovery passed. Local verification used Node 24.18.0 on macOS; cross-platform CI remains pending.