Carry caller-selected target identity separately from launcher selection. Only fully collected ordinary nonzero decode exits represent target refusals; startup, preparation, capture and signal failures retain provider attribution. Reuse one command/preparation output projection for probe and decode errors.
Adapt the target-path correction from PR #3462 (08d3d0d3a0) and extend its producer-boundary classification and regression coverage.
Validation: 131 focused tests in 12 files, final 50 source checks, build, typecheck/lint and docs. Ten regression controls fail on baseline 4844ae812. Twenty-four tiny actual CLI/stdio MCP refusal tasks preserve every projected field except the corrected message/path. Authored launchers only; no real Apktool/JVM or native Windows claim. Heavy stress/profiling remained stopped.
Closes#3340
Co-authored-by: Peter <304086198+peter-research@users.noreply.github.com>
