Probe the full target with probeLiteralPathExists before classifying it as a
mis-dispatched read-selector list, matching the single-selector guard, so an
existing POSIX file like 'report:1-2;archive:3-4' can still be overwritten.
The read-selector-misfire guard (#6123/#6387) short-circuited whenever
`content` was non-empty, so a semicolon-joined list of read selectors
(`a.txt:1-2;b/c.txt:3-4`) passed as a write path with content fell through
to ordinary filesystem creation and silently built a nested directory tree
in the workspace. `read` accepts no such list, so this shape is always a
mis-dispatched multi-file read.
Refuse any target that splits on `;` into 2+ segments each carrying its own
read selector, regardless of `content` — the non-empty-content escape hatch
covers a lone selector-shaped filename, never a `;`-list.
Fixes#6809
Passed session-scoped settings through Edit and Write generated-file checks and fell back to schema defaults when no global singleton exists.
Guarded inline image sizing against an uninitialized global settings proxy and added isolated-session regression coverage.
Fixes#6549
Applied the read-selector misfire check to archive members after loading
the archive entry map and before mutation. Missing empty selector-shaped
members now fail closed, while existing literal members remain writable.
Added regression coverage proving rejected writes leave archives unchanged.
A read-only step that mis-dispatches read as write passes the full read
expression (src/foo.tsx:1-260:raw) as the target. Because a literal colon
filename is legal on POSIX (#4618), write resolved it to filesystem creation
and reported success, leaving a stray zero-byte file the model could not
recover from - the local analogue of the xd:// near-miss guard (#6123).
assertNotReadSelectorMisfire now fails closed when the tail parses as a
read-tool selector, the literal target is missing, and content is empty,
pointing at the equivalent read(...). Non-empty content stays the escape
hatch and existing literal colon filenames remain writable.
Fixes#6387
can1357