Relative paths in write_file/patch could resolve against the agent PROCESS cwd
instead of the terminal's working directory. In a git-worktree session with a
stale TERMINAL_CWD='.' (a relative base), early edits silently landed in the
MAIN checkout, verified there, and reported success — while the agent inspected
the worktree and saw nothing, misreading it as the patch tool no-op'ing.
- _resolve_base_dir(): resolution base is now ALWAYS absolute. A relative
TERMINAL_CWD is anchored to the process cwd once, deterministically, instead
of being left to resolve()-time cwd. Live terminal cwd stays authoritative.
- write_file/patch pass the resolved absolute path to the shell FileOps layer
so the tool layer and shell layer can't disagree about which file is edited.
- Responses now report the absolute resolved_path and files_modified, so a
wrong-cwd mismatch is visible on the first call.
- _path_resolution_warning(): emits a _warning when a relative path resolves
OUTSIDE the live terminal cwd (e.g. a worktree session writing into main).
Validation: 11 new unit tests + 43 live E2E assertions (worktree routing,
mid-session cd, V4A patches, divergence warning, absolute paths, consecutive
patches); 466 existing file/path/terminal tests green.
96643b4a52