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>

.claude/rules/command-development.md

@@ -0,0 +1,24 @@
+---
+paths: commands/**/*.md
+---
+
+# Command Development Rules
+
+## Required Frontmatter
+
+All command files MUST include:
+
+```yaml
+---
+name: plugin:command
+description: Short description of what this command does
+allowed-tools: Read, Write, Bash, Task
+model: sonnet
+---
+```
+
+## Naming Convention
+
+- Commands use `plugin-name:action` format (e.g., `config-audit:analyze`)
+- Main router command uses just the plugin name (e.g., `config-audit`)
+- Description should be one line, actionable