[isomorphisms]

View exposure must survive replaceable adapters without becoming a claim that a person read or understood content. This child of the source-bound fragment store implements an Idriç observation record, idempotent acceptance and private TSV replay over the existing source/revision/fragment identities.

The semantic core records explicit observation/adapter/clock identity, code-point range, interval, kind, foreground and occlusion. It refuses stale source tuples, conflicting callback identities, overlapping same-adapter samples and backwards time. Newline commits a row; replay preserves prior valid rows and reports invalid complete rows or an incomplete final tail. The version-one per-fragment duration query counts only unoccluded foreground visibility and can be rebuilt. Append normalization refuses silently rewriting a corrupt/torn prior journal.

Grease snapshots bounded source, graph, prior journal and one explicit proposed adapter row, verifies source SHA256 and UTF8, preserves the normalizer's status, and publishes a new immutable generation through Longview's existing adapter. Existing generations remain independently readable.

Evidence: actual current Idriç checker ff4d852862a3942592f8ade9afde8d409d9803be typechecks core, command and acceptance. Its pure compiler normalizer reports True for all17 fake-clock and recovery cases. A mutation counting background time makes the duration and torn-tail duration assertions False; delivered source restores foreground filtering. Actual current Grease5651 executes generation roundtrip, partial producer bytes followed by exit7 refusal, prior generation survival and stale-byte refusal; the producer is explicitly an OS fixture.

Status: PARTIAL. Integrated Idriç→Grease execution remains blocked on the parent S06 qualified ICK/NDK consumer executable gate. No alternate backend was used. Physical visibility/occlusion, Android installation and real private corpus are NOT_RUN. Exact receipts and compatibility options are in docs/view-observation-acceptance.md. D06 owns platform observation wiring.

Owner #101; assignment #120 / IB-S07. Dependency: isomorphisms/ib PR #123, “Persist source-bound fragments and checked reading traversals” (#123).