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>

commands/deep-scan.md

@@ -0,0 +1,42 @@
+---
+name: security:deep-scan
+description: Run deterministic deep-scan — 9 Node.js scanners for Unicode attacks, entropy analysis, permission mapping, dependency auditing, taint tracing, git forensics, network mapping, memory poisoning, and toxic flow analysis
+allowed-tools: Read, Glob, Grep, Bash, Agent
+model: sonnet
+---
+
+# /security deep-scan [path]
+
+9 deterministic Node.js scanners — entropy, Unicode, typosquatting, git forensics, taint tracing, dep audit, network mapping, memory poisoning, toxic flow analysis.
+
+## Step 1: Setup
+
+- `$ARGUMENTS` empty → target = cwd. Otherwise target = `$ARGUMENTS` (strip `--deep`).
+- Plugin root = parent of this `commands/` folder.
+- Get temp path: `node -p "require('path').join(require('os').tmpdir(), 'deep-scan-results.json')"`
+
+## Step 2: Run Orchestrator
+
+```bash
+node <plugin-root>/scanners/scan-orchestrator.mjs "<target>" --output-file "<results_file>"
+```
+
+Exit 0=ALLOW, 1=WARNING, 2=BLOCK. Stdout = compact aggregate JSON. Full results in file.
+
+## Step 3: Show Banner
+
+```
+## Deep Scan: [VERDICT]
+Risk Score: X/100 | Findings: XC XH XM XL XI
+Scanners: X ok, X error, X skipped
+```
+
+## Step 4: Synthesize Report
+
+Spawn `subagent_type: "llm-security:deep-scan-synthesizer-agent"`, `model: "sonnet"`:
+
+> Read scan results from: \<results_file\>
+> Read: \<plugin-root\>/knowledge/mitigation-matrix.md
+> Produce complete report with actionable insights. Don't pad.
+
+Output the synthesizer's report. If it fails, show banner + CRITICAL/HIGH findings from JSON.