docs: LLM-Agent-SHA opaque attribution convention, Phase 0 (#86) (#87)

Merge PR 87

Co-authored-by: Jason Walker <913443@dadeschools.net>
Co-committed-by: Jason Walker <913443@dadeschools.net>

skills/llm-project-workflow/templates/review-pr.md

@@ -8,6 +8,8 @@ Task: review PR #<pr> for issue #<n>.
 Rules (llm-project-workflow):
 - Review in a SEPARATE detached review worktree, never the author's folder.
 - You must NOT be the PR author. If the authenticated user == PR author, stop.
+  A different LLM-Agent-SHA does NOT make you a different actor — only a
+  different authenticated Gitea user does (docs/llm-agent-sha.md).
 - Do not merge if any check fails.
 
 Steps:
@@ -21,6 +23,14 @@ Steps:
 6. Run the test suite; note results.
 7. Post the review verdict: approve only if scope is clean and checks pass;
    otherwise request changes with specifics. Never merge from this review step.
+   Include a "Review Metadata" block (attribution only — docs/llm-agent-sha.md):
+
+   Review Metadata:
+   - LLM-Agent-SHA: llm-<12 lowercase hex, e.g. llm-41d0e7aa9f2c>
+   - LLM-Role: reviewer
+   - Authenticated-Gitea-User: <whoami result>
+   - MCP-Profile: <profile name>
+   - Eligibility: passed/failed
 
 Handoff: reviewer identity, PR author, scope verdict, checks + results, decision.
 ```

skills/llm-project-workflow/templates/start-issue.md

@@ -23,6 +23,17 @@ Steps:
 6. Checks: run the test suite, compile/lint changed files, git diff --check,
    and scan the diff for secrets.
 7. Commit (issue-linked message), push the branch, open a PR to master.
+   Include an "LLM Handoff Metadata" block in the PR body (attribution only;
+   never an eligibility input — docs/llm-agent-sha.md):
+
+   LLM Handoff Metadata:
+   - LLM-Agent-SHA: llm-<12 lowercase hex, e.g. llm-8f3a9c2d6b41>
+   - LLM-Role: implementer
+   - Authenticated-Gitea-User: <whoami result>
+   - MCP-Profile: <profile name>
+   - Branch: <branch>
+   - Worktree: <worktree path>
+   - Self-review allowed: no
 8. Stop before review/merge — you are the author.
 
 Handoff: issue #, branch, worktree path, files changed, checks + results, PR URL.