fix: update /tmp references to use KUGETSU_TEMP_DIR

Replace /tmp references with ${KUGETSU_TEMP_DIR:-~/.local/share/opencode/tool-output}
since opencode blocks /tmp access in headless mode.

Updated files:
- docs/SUBAGENT_WORKFLOW.md
- docs/hermes-communication-patterns.md
- docs/hermes-setup.md
- docs/kugetsu-setup.md
- docs/opencode-usage.md
- skills/kugetsu/pm/SKILL.md

Fixes #73

docs/hermes-communication-patterns.md

@@ -150,8 +150,8 @@ result = delegate_task(
 Steps:
 1. Read existing docs in ~/repositories/kugetsu/docs/
 2. Identify message passing mechanisms used
-3. Write findings to /tmp/findings-4.md
-4. cat /tmp/findings-4.md
+3. Write findings to ${KUGETSU_TEMP_DIR:-${HOME}/.local/share/opencode/tool-output}/findings-4.md
+4. cat findings file
 5. Post findings as Gitea issue comment
 
 Gitea: git.example.com
@@ -178,8 +178,8 @@ terminal(
 ### 4.3 Posting Findings to Gitea (from subagent)
 
 ```bash
-# Write findings to temp file first
-cat > /tmp/findings-4.md << 'EOF'
+# Write findings to temp file first (use KUGETSU_TEMP_DIR instead of /tmp)
+cat > ${KUGETSU_TEMP_DIR:-${HOME}/.local/share/opencode/tool-output}/findings-4.md << 'EOF'
 # Research Findings for Issue #4
 
 ## Message Passing Mechanisms Identified
@@ -194,10 +194,10 @@ EOF
 
 # Post as issue comment
 curl -X POST "git.example.com/api/v1/repos/shoko/kugetsu/issues/4/comments" \
-  -H "Authorization: token &lt;YOUR_GITEA_TOKEN&gt;" \
+  -H "Authorization: token <YOUR_GITEA_TOKEN>" \
   -H "Content-Type: application/json" \
   -H "User-Agent: Kugetsu-Subagent/1.0" \
-  -d @/tmp/findings-4.md \
+  -d @${KUGETSU_TEMP_DIR:-${HOME}/.local/share/opencode/tool-output}/findings-4.md \
   --max-time 30 \
   --retry 3 \
   --retry-delay 5