feat(ultraplan-local): v1.6.0 — /ultraresearch-local deep research command

Add /ultraresearch-local for structured research combining local codebase
analysis with external knowledge via parallel agent swarms. Produces research
briefs with triangulation, confidence ratings, and source quality assessment.

New command: /ultraresearch-local with modes --quick, --local, --external, --fg.
New agents: research-orchestrator (opus), docs-researcher, community-researcher,
security-researcher, contrarian-researcher, gemini-bridge (all sonnet).
New template: research-brief-template.md.

Integration: --research flag in /ultraplan-local accepts pre-built research
briefs (up to 3), enriches the interview and exploration phases. Planning
orchestrator cross-references brief findings during synthesis.

Design principle: Context Engineering — right information to right agent at
right time. Research briefs are structured artifacts in the pipeline:
ultraresearch → brief → ultraplan --research → plan → ultraexecute.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/agents/post-feedback-monitor.md

@@ -153,7 +153,7 @@ Check for these six anomaly patterns:
 - Video with <30s average watch time
 - Text post with very high impressions but low engagement
 **Likely cause:** Format choice didn't match the content or audience preference
-**Intervention:** Document for future posts. Consider repurposing the content in a different format. For carousels: check if slide count is optimal (12 slides). For video: check if captions are present (85% watch muted).
+**Intervention:** Document for future posts. Consider repurposing the content in a different format. For carousels: check if slide count is optimal (7 slides, 5-10 range). For video: check if captions are present (85% watch muted).
 
 ## Step 4: Real-Time Intervention Playbook