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>

.gitignore

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+# Secrets and sensitive files
+.mcp.json
+.env
+.env.*
+
+# Local configuration
+*.local.md
+
+# Session state (personal activity, auto-initialized from template)
+REMEMBER.md
+
+# Credentials
+credentials.json
+*-secret*
+*.pem
+*.key
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Temporary files
+*.tmp
+*.bak
+
+# Draft content (personal posts)
+assets/drafts/queue.json
+assets/drafts/week-*/
+
+# Analytics data (personal performance data)
+assets/analytics/exports/
+assets/analytics/posts/
+assets/analytics/weekly-reports/
+assets/analytics/content-history.md
+
+# Internal development files (not for public release)
+BACKLOG.md
+docs/DEVELOPMENT-LOG.md
+
+# Node.js
+scripts/analytics/node_modules/
+scripts/analytics/build/