test(ptc): refresh persistent prompt for current tool guidance

snapshots/session/ptc-persistent/system-prompt.expected.md

@@ -50,7 +50,7 @@ Program-only SDK bindings:
 type JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }
 
 interface ToolArgsMap {
-  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell; pass `workdir` instead of using `cd`. Managed `$DSH_*` variables expose current harness environment facts. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]`, a policy denial: do not retry another way. */
+  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell; pass `workdir` instead of using `cd`. Managed `$DSH_*` variables expose current harness environment facts. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Before any delete or move, verify that the resolved absolute target path is the intended one; never run it against a computed path you have not checked. An unset variable expands to an empty string, so guard variables in such paths with `${VAR:?}`. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]`, a policy denial: do not retry another way. */
   bash: {
     /** The bash command to execute. */
     command: string;