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>

templates/spec-template.md

@@ -0,0 +1,64 @@
+# Task: {title}
+
+## Goal
+
+What success looks like. One clear paragraph.
+
+## Non-Goals
+
+What is explicitly out of scope for this task.
+
+- {non-goal 1}
+- {non-goal 2}
+
+## Constraints
+
+Technical, time, or resource limitations.
+
+- {constraint 1}
+- {constraint 2}
+
+## Preferences
+
+Preferred patterns, frameworks, libraries, or approaches.
+
+- {preference 1}
+- {preference 2}
+
+## Non-Functional Requirements
+
+Performance, security, accessibility, scalability, or other quality attributes.
+
+- {NFR 1}
+- {NFR 2}
+
+## Success Criteria
+
+Falsifiable conditions that define "done". Each must be checkable by running a
+command or observing a specific system behavior.
+
+- {criterion — e.g., "All existing tests pass: `npm test` exits 0"}
+- {criterion — e.g., "New endpoint returns 200: `curl -s localhost:3000/api/health | jq .status` → "ok""}
+- {criterion — e.g., "No TypeScript errors: `npx tsc --noEmit` exits 0"}
+
+Do NOT write vague criteria:
+- "It should work" (not testable)
+- "The feature is implemented" (not falsifiable)
+- "Performance is acceptable" (no baseline given)
+
+## Prior Attempts
+
+What has been tried before and what happened. Leave blank if this is a fresh task.
+
+## Open Questions
+
+Unresolved items that may affect the plan. Flag these as assumptions if proceeding
+without answers.
+
+- {question 1}
+
+## Metadata
+
+- **Created:** {YYYY-MM-DD}
+- **Mode:** {interview | manual}
+- **Source:** {ultraplan interview | user-provided}