feat(ultraplan-local): v2.2.0 — /ultra-cc-architect-local

New optional command between /ultraresearch-local and /ultraplan-local that
matches brief+research against Claude Code features (hooks, subagents, skills,
output-styles, MCP, plan-mode, worktrees, background-agents) and produces an
architecture note with brief-anchored rationale plus explicit gaps.

Added:
- commands/ultra-cc-architect-local.md (--project, --fg, --quick, --no-gaps)
- agents/architect-orchestrator.md (opus) — 6-phase background orchestrator
- agents/feature-matcher.md (sonnet) — fallback-ranked feature proposals
- agents/gap-identifier.md (sonnet) — 4 gap classes with issue-ready drafts
- agents/architecture-critic.md (sonnet) — hallucination gate as BLOCKER
- skills/cc-architect-catalog/ — SKILL.md + 10 seed entries (reference/pattern)

Changed (non-breaking):
- commands/ultraplan-local.md — auto-discovers architecture/overview.md
- agents/planning-orchestrator.md — cross-references cc_features_proposed
- plugin.json — 2.1.0 → 2.2.0, description, cc-architecture keyword
- CHANGELOG, README, CLAUDE.md (plugin + marketplace root)

Pipeline becomes brief → research → architect → plan → execute. Architect is
optional; existing project dirs keep working unchanged.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/ultraplan-local/agents/planning-orchestrator.md

@@ -66,6 +66,12 @@ You will receive a prompt containing:
 - **Research briefs** (optional) — paths to research briefs. Includes both
   auto-discovered `{project_dir}/research/*.md` files and any explicit briefs
   passed via `--research`. Read each brief before launching exploration agents.
+- **Architecture note** (optional) — path to `{project_dir}/architecture/overview.md`
+  produced by the optional `/ultra-cc-architect-local` command. When provided,
+  this note proposes CC features (hooks, subagents, skills, MCP, etc.) the
+  implementation should lean on, with brief-anchored rationale and a coverage-
+  gap section. Missing file is fine — this is additive context, not a
+  requirement. Value is either an absolute path or `"none"`.
 
 Read the brief file first. It is the contract that bounds your work. Parse its
 frontmatter (`task`, `slug`, `project_dir`, `research_topics`, `research_status`)
@@ -75,6 +81,12 @@ Success Criteria, Research Plan, Open Questions, Prior Attempts).
 If research briefs are provided, read those too — they contain pre-built context
 for the research topics the brief declared.
 
+If an architecture note is provided (path != "none"), read it before launching
+exploration agents. Treat its `cc_features_proposed` list as **priors**, not
+mandates — exploration may contradict or override with evidence from the
+codebase. Surface the architecture note's Open Questions inside your synthesis
+so the plan addresses them.
+
 ## Your workflow
 
 Execute these phases in order. Do not skip phases.
@@ -183,8 +195,15 @@ Synthesize all findings:
 6. **If research briefs provided:** cross-reference agent findings with pre-existing
    brief. Flag agreements (increases confidence) and contradictions (needs resolution).
    Incorporate brief recommendations into planning context.
-7. Note remaining gaps as explicit assumptions
-8. **Map brief sections → plan sections:**
+7. **If an architecture note is provided:** cross-reference agent findings with
+   the note's `cc_features_proposed`. For each proposed feature, check whether
+   exploration confirms or contradicts the rationale. Proposed features that the
+   codebase already uses well → adopt in plan. Proposed features that conflict
+   with codebase patterns → surface the conflict in the plan's Alternatives
+   Considered section and choose based on evidence, not the note alone. Include
+   the note's Coverage gaps in Risks and Mitigations when relevant to the task.
+8. Note remaining gaps as explicit assumptions
+9. **Map brief sections → plan sections:**
    - Brief Intent → plan Context (motivation paragraph)
    - Brief Goal → plan Context (end state)
    - Brief Constraints/Preferences/NFRs → inputs to Implementation Plan decisions