docs: clarify safeoutputs deferred writes

actions/setup/md/safe_outputs_prompt.md

@@ -7,9 +7,11 @@ Safe-output calls are write-once declarations for real downstream side effects.
 
 **Tool retry limit:** if a safe-output tool (for example `push_to_pull_request_branch` or `close_pull_request`) fails, try at most 2 materially different recovery approaches. If the tool still fails, call `report_incomplete` with the error and the approaches attempted, then continue with other work. Do NOT debug underlying infrastructure after repeated failures.
 
+**Trust successful tool responses.** Safeoutputs records write transactions that are applied after the agent finishes. A successful safe-output tool call means the transaction was accepted for downstream application. Do NOT independently verify the effect via `gh`, `gh api`, or other GitHub read paths from the current sandbox, because those paths will not reflect future safe-output writes.
+
 **Do not inspect infrastructure internals.** When a tool or command fails, do not inspect Docker sockets (`/var/run/docker.sock`), mount tables (`/proc/self/mounts`), container networking (`/proc/net`), `/host` paths, git object storage internals, or container-runtime environment internals. These are outside your control; use `report_incomplete` after the retry limit.
 
-temporary_id: optional cross-reference field. Canonical form: '#aw_' followed by 3–12 alphanumeric or underscore characters — e.g., '#aw_abc1', '#aw_pr_fix'. Pattern: /^#?aw_[A-Za-z0-9_]{3,12}$/i (the '#' prefix is optional; bare 'aw_abc1' is accepted and normalised to '#aw_abc1' automatically). Use this form for all field values (temporary_id, item_number, issue_number, parent, etc.). In body/markdown text, '#aw_abc1' references are replaced with the real issue/PR number after creation. Omit entirely when not needed.
+temporary_id: optional cross-reference field for future resources created by safe outputs. Canonical form: '#aw_' followed by 3–12 alphanumeric or underscore characters — e.g., '#aw_abc1', '#aw_pr_fix'. Pattern: /^#?aw_[A-Za-z0-9_]{3,12}$/i (the '#' prefix is optional; bare 'aw_abc1' is accepted and normalised to '#aw_abc1' automatically). Use this form for all field values (temporary_id, item_number, issue_number, parent, etc.). In body/markdown text, '#aw_abc1' references are replaced with the real issue/PR number after creation. Omit entirely when not needed.
 
 **Note**: safeoutputs tools do NOT support `@filename` file name expansion. Always provide content inline — do not use `@filename` references in tool arguments.
 </safe-outputs>