# drop dangling design-doc reference in grounding comment

What: drop a dangling design-doc reference from the CaptureKindForOrigin comment (3 lines, comment-only).

Why: the referenced plan doc (devdocs/plans/bkc-bidirectional-context-and-hermetic-dryrun-spec.md) no longer exists in the tree; repointing at devdocs/ would dangle for every public reader, since devdocs/ is not part of the clone. The sentence stands without the pointer.

Gates run: go build ./context/...; go test ./context/knowledge; make envcheck (1087 files scanned, PASS).

Known gaps: none in this diff. The sibling pathway — length-prefixing compilationDigest so the deterministic digest is also collision-safe across field boundaries — is drafted separately (see the internals book, Chapter 8 §8.3 and Chapter 12 §12.5, rung 2).

Signed-off-by: prestin liu lexbit@users.noreply.github.com