adopt-project.py: five printed sentences say what the run does not do: the Makefile follow-up beside a root Makefile, the contracts/-only read-across path, execute would stop there, a path names no attribute, and WHAT WILL HAPPEN under --local-remote-dir #906

Goal: each follow-up, finding and plan line that adopt-project.py prints says what the run does.

Filed by lane openRepoShape-3, from its triage of #457 at the v1.1.1 release commit 5017830. It groups #457's lines L2-72, L2-73, L1-91, L1-93 and L1-75, one pull request's worth.

State at 5017830. Read, not run.

• L2-72. follow_ups_for (adopt-project.py:3303) adds "the root Makefile wires CONTRACTS_DIR to the contracts/ of the spec leg ..." whenever the spec leg holds contracts/ (:3346-3351). It adds it even where the source keeps its own root Makefile. Then the shape's Makefile, with the block, is written beside it as shape/Makefile, and the root Makefile wires nothing until the two are merged. Lane 2 measured this on 4cf5fb07: make contracts-dir says No rule to make target.
• L2-73. contracts_from_code_leg (:3258) returns nothing unless a path of the spec leg is contracts/ or lies under it (:3283). So a code file that names specs/ gets the key-form read-across line and no ready path, where v1.1.0 printed ../spec/specs/.
• L1-91. _refused_finding (:10444-10448) says "execute would stop there, after the leg repositories exist". For * working-tree-encoding=UTF-16LE with .gitattributes exempted, execute stops earlier, mounting the legs, on .gitmodules.
• L1-93. The docstring at :9675 says "A target that is a path names no attribute". That holds only for a link target with no space.
• L1-75. Under --local-remote-dir, WHAT WILL HAPPEN still prints create <Project>-spec and <Project>-code (private) (:8575-8580), though a bare repository has no visibility.

Direction.

• L2-72: where the root keeps its own Makefile, say that the block waits in shape/Makefile until the two are merged, as Pinned shape copies: one bump, so AGENTS-shape.md is true of every root, the scaffold's chain WARNING offers only its own sources and spells --pin-source, the root's not-used note spells it too, and THE LOCKSTEP RULE's bump runs (#610) #634 words the same case for the pinned AGENTS-shape.md, and move MAKEFILE_FOLLOW_UP in tests/test_adopt_contracts_dir.py with it.
• L2-73: print the spec leg's own path from the code leg beside the mounts whenever the plan holds a read-across follow-up.
• L1-91 and L1-93: say where execute stops, and narrow the docstring.
• L1-75: print no visibility under --local-remote-dir.

Size: S.

Lane: openreposhape-3 (openRepoShape-3)