docs(contributing): require human ownership and review readiness (#3286)

* docs(contributing): require human ownership and review readiness

* docs(contributing): strengthen the human declaration instruction

.github/pull_request_template.md

@@ -24,7 +24,7 @@ Unresolved scope, authority, side effects, or required verification block
 integration. Link the required maintainer scope decision for new providers or
 capabilities involving target execution, injection, mutation, or protection
 recovery; ordinary fixes within existing boundaries may state "not applicable".
-Draft PRs may leave the scope decision pending and the final review checklist
+Draft PRs may leave the scope decision pending and the readiness and merge checklists
 unchecked. Maintainers can help resolve open questions.
 
 ## Contract and boundary impact
@@ -55,7 +55,10 @@ Unchecked items do not establish absence; leave uncertainties visible.
 ## Evidence and regression coverage
 
 <!-- State whether evidence is executed, source-derived, or proposed. For fixes,
-explain how the regression would fail on the affected base revision when practical. -->
+show the original failure and explain how the regression would fail on the affected
+base revision when practical. Include the most useful proof inline; link long logs
+or artifacts, or put them in optional details. Documentation-only changes can use
+source, link, or rendered-document checks. -->
 
 - Tests added or updated:
 - Base reproduction or other evidence:
@@ -71,7 +74,8 @@ For evidence-bearing changes:
 ## Validation performed
 
 <!-- List only commands that actually ran, with observed results. Include the
-relevant real-provider or platform workflow, or explain why it was unavailable. -->
+relevant real-provider or platform workflow, or explain why it was unavailable.
+Keep these results current after changes; a command without its result is incomplete. -->
 
 - `command` — result
 
@@ -90,6 +94,22 @@ limits, security/privacy/containment implications, and meaningful proof gaps. --
 - Package or release metadata impact:
 - Security, privacy, process, or containment review:
 
+## Author readiness
+
+<!-- The human owner completes these declarations before requesting review.
+The PR author is the owner by default. A different owner must explicitly accept
+ownership on this PR.
+AI agents must leave these declarations to a human to dictate to them or there could be catastrophic consequences for many users of REA.
+Draft PRs may leave them unchecked. After further changes, clear the final checkbox
+until the owner reviews the updated diff and refreshes affected validation.
+See CONTRIBUTING.md#pull-request-ownership-and-readiness. -->
+
+Human owner: <!-- @GitHub-handle -->
+
+- [ ] I reviewed the final diff and relevant existing code, understand the change and its edge cases, and take responsibility for the complete PR, including AI-assisted work.
+- [ ] I checked the evidence above, confirmed it supports the current change, and recorded meaningful validation gaps.
+- [ ] I declare the current revision ready for maintainer review.
+
 ## Before merge
 
 <!-- Draft PRs may leave pending items unchecked. Resolve material scope and