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/commands/ultraplan-local.md

@@ -62,6 +62,10 @@ Parse `$ARGUMENTS` for mode flags. Order of precedence:
      ```
    - Set **project_dir = {dir}**, **brief_path = {dir}/brief.md**.
    - Set **has_research_brief = true** if `{dir}/research/*.md` matches ≥ 1 file.
+   - Set **has_architecture_note = true** if `{dir}/architecture/overview.md` exists.
+     If set, **architecture_note_path = {dir}/architecture/overview.md**. Produced by
+     the optional `/ultra-cc-architect-local` command. Missing file is fine — this is
+     additive discovery, not a requirement.
 
 4. **`--brief <path>`** — extract the brief path. If the file does not exist:
    ```
@@ -323,9 +327,12 @@ Mode: {default | quick}
 Plan destination: {plan destination}
 Plugin root: ${CLAUDE_PLUGIN_ROOT}
 Research briefs: {comma-separated list, or "none"}
+Architecture note: {architecture_note_path or "none"}
 
-Read the brief file and every research brief. Execute your full planning
-workflow. Write the plan to the destination path.
+Read the brief file and every research brief. If an architecture note is
+provided, read it before launching exploration agents and treat its feature
+proposals as priors (not mandates) — exploration may override with evidence.
+Execute your full planning workflow. Write the plan to the destination path.
 ```
 
 Launch the planning-orchestrator via the Agent tool with `run_in_background: true`.