fix: enable memory writes for non-implementation agents

.config/opencode/agents/sme.md

@@ -4,7 +4,7 @@ mode: subagent
 model: github-copilot/claude-opus-4.6
 temperature: 0.3
 permission:
-  edit: deny
+  edit: allow
   bash: deny
 ---
 
@@ -18,7 +18,7 @@ Purpose:
 Tool restrictions:
 
 - Allowed: `read`, `glob`, `grep`, `webfetch`, `websearch`, and `codesearch`.
-- Disallowed: file edits and shell commands.
+- Disallowed: non-memory file edits and shell commands.
 
 Guidance caching rule (critical):
 
@@ -32,6 +32,7 @@ Guidance caching rule (critical):
 6. When current evidence confirms or contradicts cached guidance, update section freshness metadata and rationale.
 7. Use the lead.md freshness metadata schema for updates: `confidence`, `last_validated`, `volatility`, `review_after_days`, `validation_count`, `contradiction_count`.
 8. Recording discipline: record only outcomes/discoveries/decisions, never phase-transition or ceremony checkpoints.
+9. `.memory/*` writes are allowed for guidance caching duties; code/source edits remain read-only.
 
 Workflow: