# Mixed CLI read interface

Implements the selected `harness/analysis-mixed-cli-contract-20260925.md` contract
in the integration owner's root records. Local implementation checkpoint; no
runtime claim is made by this note.

`oa_cli::check_mixed(&Path) -> Report` loads `MixedSourceSnapshot`, checks its
borrowed original bundle only when discovery diagnostics are empty, and copies
only returned diagnostics into the existing format-1 report. It never constructs
`Prepared`, compiles ordinary source, stabilizes identities, migrates or saves.
The closed `Dispatch` enum separates `CheckMixed` from `Editable { operation,
write }`; `Operation` and `prepare` retain their existing ordinary semantics.

Reports preserve input locations and explicit object IDs. Successful warnings
are retained. Source errors use `invalid`/1, loader missing/path/journal diagnostic
refusals use `invalid`/3, and direct `SourceFileError` retains the existing
`rejected`/3 mapping. Fixed fields are empty changes/notes, false written, zero
identity stabilization, and null migration. Human output names a mixed source8
check, with no edit-candidate summary. `--write`, unknown/repeated options and
wrong arity cannot enter either loader or preparation through mixed dispatch.

Six external `mixed_cli` tests execute the real Cargo-provided binary. The rich
OA/SA fixtures reuse previously authored ordinary/typed literals and independently
constructed public model values, with an explicit SA System, reordered call
labels, escaped include paths, decoy include comments, Unicode and LF/CRLF.
Their complete returned models and four ordered leaf warnings are checked before
complete CLI report comparison. The four warnings represent two leaf declarations
(allocation then coverage); they do not replace the earlier one-leaf oracle.
Other cases cover all four missing-UUID classes, schema refusal, cross-file
semantic failure, missing/cyclic/escaping includes, invalid UTF-8, pending journal,
reserved root, human output and option refusal. Each subprocess compares complete
file bytes and directory inventory before/after, including unrelated files.
Platform-specific OS missing-file text is obtained from an independent filesystem
metadata error; no parser, formatter or CLI output generates expected reports.

The parent owns compilation/runtime acceptance. This source note does not imply
Linux coverage, full mixed editing, GUI adoption or an atomic disk snapshot.