refactor(marketplace): split cc-architect from ultraplan-local into its own plugin

Extract `/ultra-cc-architect-local` and `/ultra-skill-author-local` plus all 7
supporting agents, the `cc-architect-catalog` skill (13 files), the
`ngram-overlap.mjs` IP-hygiene script, and the skill-factory test fixtures
from `ultraplan-local` v2.4.0 into a new `ultra-cc-architect` plugin v0.1.0.

Why: ultraplan-local had drifted into containing two distinct domains — a
universal planning pipeline (brief → research → plan → execute) and a
Claude-Code-specific architecture phase. Keeping them together forced users
to inherit an unfinished CC-feature catalog (~11 seeds) when they only
wanted the planning pipeline, and locked the catalog and the pipeline into
the same release cadence. The architect was already optional and decoupled
at the code level — only one filesystem touchpoint remained
(auto-discovery of `architecture/overview.md`), which already handles
absence gracefully.

Plugin manifests:
- ultraplan-local: 2.4.0 → 3.0.0 (description + keywords updated)
- ultra-cc-architect: new at 0.1.0 (pre-release; catalog is thin, Fase 2/3
  of skill-factory unbuilt, decision-layer empty, fallback list still
  needed)

What stays in ultraplan-local: brief/research/plan/execute commands, all
19 planning agents, security hooks, plan auto-discovery of
`architecture/overview.md` (filesystem-level contract, not code-level).

What moved (28 files via git mv, R100 — full history preserved):
- 2 commands, 8 agents, 1 skill catalog (13 files), 2 scripts, 8 fixtures

Documentation updates: plugin CLAUDE.md and README.md for both plugins,
root README.md (added ultra-cc-architect section, updated ultraplan-local
section), root CLAUDE.md (added ultra-cc-architect to repo-struktur),
marketplace.json (registered ultra-cc-architect), ultraplan-local
CHANGELOG.md (v3.0.0 entry with migration guidance).

Test verification: ngram-overlap.test.mjs passes 23/23 from new location.

Memory updated: feedback_no_architect_until_v3.md now points at the new
plugin and reframes the threshold around catalog maturity rather than an
ultraplan-local milestone.

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

plugins/ultraplan-local/CLAUDE.md

@@ -1,8 +1,10 @@
 # ultraplan-local
 
-Deep implementation planning and research with an explicit brief step, specialized agent swarms, external research, CC-feature matching, adversarial review, session decomposition, disciplined execution, and headless support. A local alternative to Anthropic's Ultraplan.
+Deep implementation planning and research with an explicit brief step, specialized agent swarms, external research, adversarial review, session decomposition, disciplined execution, and headless support. A local alternative to Anthropic's Ultraplan.
 
-**Design principle: Context Engineering** — build the right context by orchestrating specialized agents. Each step in the pipeline (brief → research → architect → plan → execute) produces a structured artifact that the next step consumes.
+**Design principle: Context Engineering** — build the right context by orchestrating specialized agents. Each step in the pipeline (brief → research → plan → execute) produces a structured artifact that the next step consumes.
+
+> **v3.0.0 — architect extracted to separate plugin.** `/ultra-cc-architect-local` and `/ultra-skill-author-local` were moved to the `ultra-cc-architect` plugin (v0.1.0). The plan command still auto-discovers `architecture/overview.md` if present, so installing both plugins gives you the full five-stage flow. See [CHANGELOG.md](CHANGELOG.md) for migration steps.
 
 ## Commands
 
@@ -10,10 +12,8 @@ Deep implementation planning and research with an explicit brief step, specializ
 |---------|-------------|-------|
 | `/ultrabrief-local` | Brief — interactive interview produces a task brief with explicit research plan; optionally orchestrates the pipeline | opus |
 | `/ultraresearch-local` | Research — deep local + external research, produces structured research brief | opus |
-| `/ultra-cc-architect-local` | Architect *(optional, v2.2)* — match brief+research against Claude Code features; produce architecture note with gaps. Requires `--project` | opus |
 | `/ultraplan-local` | Plan — brief-reviewer, explore, plan, review. Requires `--brief` or `--project`. Auto-discovers `architecture/overview.md` if present | opus |
 | `/ultraexecute-local` | Execute — disciplined plan/session-spec executor with failure recovery | opus |
-| `/ultra-skill-author-local` | Authoring *(v2.3, skill-factory Fase 1)* — generate one cc-architect-catalog draft from a local source with IP-hygiene | opus |
 
 ### /ultrabrief-local modes
 
@@ -37,17 +37,6 @@ Always interactive. Phase 3 is a section-driven completeness loop (no hard cap o
 
 Flags combine: `--project <dir> --local`, `--external --quick`.
 
-### /ultra-cc-architect-local modes *(optional, v2.2)*
-
-| Flag | Behavior |
-|------|----------|
-| `--project <dir>` | **Required** — read `{dir}/brief.md` and `{dir}/research/*.md`, write `{dir}/architecture/overview.md` + `{dir}/architecture/gaps.md` |
-| `--fg` | No-op alias (foreground is default since v2.4.0) |
-| `--quick` | Skip adversarial review (architecture-critic) |
-| `--no-gaps` | Skip gap-identifier; overview.md only |
-
-Architect sits between `/ultraresearch-local` and `/ultraplan-local`. It matches the task brief + research against available Claude Code features (Hooks, Subagents, Skills, Output Styles, MCP, Plan Mode, Worktrees, Background Agents) using a seeded catalog skill, and produces a proposed feature set with brief-anchored rationale plus explicit gaps (missing reference, pattern, decision, or outside-CC-scope).
-
 ### /ultraplan-local modes
 
 | Flag | Behavior |
@@ -62,6 +51,8 @@ Architect sits between `/ultraresearch-local` and `/ultraplan-local`. It matches
 
 **Breaking change (v2.0):** one of `--brief` or `--project` is required. There is no interview inside `/ultraplan-local`. The `--spec` flag has been removed — use `/ultrabrief-local` to produce a brief instead.
 
+If `{project_dir}/architecture/overview.md` exists (typically produced by the separate `ultra-cc-architect` plugin), the plan command auto-discovers it and treats `cc_features_proposed` as priors. Missing file is fine — discovery is additive, not required.
+
 ### /ultraexecute-local modes
 
 | Flag | Behavior |
@@ -93,10 +84,6 @@ Architect sits between `/ultraresearch-local` and `/ultraplan-local`. It matches
 | plan-critic | sonnet | Adversarial plan review (9 dimensions) |
 | scope-guardian | sonnet | Scope alignment (creep + gaps) |
 | session-decomposer | sonnet | Splits plans into headless sessions with dependency graph |
-| architect-orchestrator | opus | Inline reference documentation for the architecture phase workflow (feature-matcher + gap-identifier + critic) |
-| feature-matcher | sonnet | Match brief+research to CC features using catalog; brief-anchored rationale + fallback ranking |
-| gap-identifier | sonnet | Detect catalog/pattern/decision/outside-CC-scope gaps; emit issue-ready drafts |
-| architecture-critic | sonnet | Adversarial review of architecture note (hallucination gate, brief-anchor integrity, gap honesty) |
 | docs-researcher | sonnet | Official documentation, RFCs, vendor docs (Tavily, MS Learn) |
 | community-researcher | sonnet | Community experience: issues, blogs, discussions |
 | security-researcher | sonnet | CVEs, audit history, supply chain risks |
@@ -109,9 +96,7 @@ Architect sits between `/ultraresearch-local` and `/ultraplan-local`. It matches
 
 **Research:** Foreground workflow (v2.4.0): Parse mode → Interview → Parallel research swarm (5 local + 4 external + 1 bridge, spawned from main context) → Follow-ups → Triangulation → Synthesis + brief → Stats. With `--project`, writes to `{dir}/research/NN-slug.md`.
 
-**Architect (v2.2, optional):** Foreground workflow (v2.4.0): Parse mode (`--project` required) → Read inputs + audit catalog skill → Parallel `feature-matcher` + `gap-identifier` (spawned from main context) → Synthesize `overview.md` (6 sections + YAML frontmatter) → Adversarial review via `architecture-critic` (skipped in `--quick`; hallucination gate is BLOCKER) → Write `gaps.md` + stats → Present summary. With `--project`, writes `{dir}/architecture/overview.md` and `{dir}/architecture/gaps.md`. Additive — downstream `/ultraplan-local` auto-discovers the note if present.
-
-**Plan:** Foreground workflow (v2.4.0): Parse mode (validate brief input) → Codebase sizing → Brief review (`brief-reviewer`) → Parallel exploration (6-8 agents, spawned from main context) → Deep-dives → Synthesis (with architecture-note cross-reference if present) → Planning → Adversarial review (`plan-critic` + `scope-guardian`) → Present/refine → Handoff. With `--project`, writes to `{dir}/plan.md` and auto-detects `{dir}/architecture/overview.md`.
+**Plan:** Foreground workflow (v2.4.0): Parse mode (validate brief input) → Codebase sizing → Brief review (`brief-reviewer`) → Parallel exploration (6-8 agents, spawned from main context) → Deep-dives → Synthesis (with architecture-note cross-reference if present) → Planning → Adversarial review (`plan-critic` + `scope-guardian`) → Present/refine → Handoff. With `--project`, writes to `{dir}/plan.md` and auto-detects `{dir}/architecture/overview.md` (produced by the separate `ultra-cc-architect` plugin if installed).
 
 **Decompose:** Parse plan → Analyze step dependencies → Group into sessions → Identify parallel waves → Generate session specs + dependency graph + launch script.
 
@@ -119,20 +104,22 @@ Architect sits between `/ultraresearch-local` and `/ultraplan-local`. It matches
 
 **Security:** 4-layer defense-in-depth: plugin hooks (pre-bash-executor, pre-write-executor), prompt-level denylist (works in headless sessions), pre-execution plan scan (Phase 2.4), scoped `--allowedTools` replacing `--dangerously-skip-permissions`. Hard Rules 14-16 enforce verify command security, repo-boundary writes, and sensitive path protection.
 
-**Pipeline:** `/ultrabrief-local` produces the task brief. `/ultraresearch-local --project <dir>` fills in `{dir}/research/`. `/ultra-cc-architect-local --project <dir>` *(optional, v2.2)* matches available Claude Code features against brief+research and writes `{dir}/architecture/`. `/ultraplan-local --project <dir>` reads brief + research (+ architecture note if present) to produce `{dir}/plan.md`. `/ultraexecute-local --project <dir>` executes and writes `{dir}/progress.json`. All artifacts live in one project directory.
+**Pipeline:** `/ultrabrief-local` produces the task brief. `/ultraresearch-local --project <dir>` fills in `{dir}/research/`. `/ultraplan-local --project <dir>` reads brief + research to produce `{dir}/plan.md` (and auto-discovers `{dir}/architecture/overview.md` if the separate `ultra-cc-architect` plugin produced one). `/ultraexecute-local --project <dir>` executes and writes `{dir}/progress.json`. All artifacts live in one project directory.
 
-**CC-feature catalog skill:** The architect phase loads the `cc-architect-catalog` skill, which indexes Claude Code primitives (hooks, subagents, skills, output styles, MCP, plan mode, worktrees, background agents) across three layers: `reference` (how a feature works), `pattern` (when to reach for it), `decision` (adoption heuristics). The `feature-matcher` agent only proposes features covered by the catalog *or* an explicit fallback list — a hallucination gate that `architecture-critic` enforces as BLOCKER severity. The `gap-identifier` agent emits issue-ready drafts for missing catalog entries so the catalog grows with real usage rather than speculation. The catalog lives at `skills/cc-architect-catalog/`.
+**Project-directory contract (v3.0.0):** ultraplan-local owns the directory layout below. The `architecture/` subdirectory is opt-in and produced by the separate `ultra-cc-architect` plugin — install that plugin to participate in the architect step.
 
-**Slug convention (v2.3.1):** catalog files follow `<cc_feature>[-<qualifier>]-<layer>.md`.
+```
+.claude/projects/{YYYY-MM-DD}-{slug}/
+  brief.md           ← ultrabrief-local writes; everyone reads
+  research/*.md      ← ultraresearch-local writes; plan + architect read
+  architecture/      ← OPT-IN, owned by ultra-cc-architect plugin
+    overview.md
+    gaps.md
+  plan.md            ← ultraplan-local writes; ultraexecute reads
+  progress.json      ← ultraexecute-local writes
+```
 
-- **Unqualified slugs** (e.g., `hooks-pattern.md`) are the canonical baseline — one per `(feature, layer)` pair, covering generic shapes and decision-heuristics for the feature.
-- **Qualified slugs** (e.g., `hooks-observability-pattern.md`) cover specific named sub-patterns. Zero-or-more per `(feature, layer)` pair. The qualifier MUST be kebab-case and descriptive (`observability`, `migration`, `multi-tenant`).
-- **Matcher logic:** `feature-matcher` builds `cc_feature → {layer → [skills]}` and prefers the unqualified baseline when the brief does not specifically justify a variant. Multiple skills can be proposed together when they cover non-overlapping aspects of the same feature.
-- **Critic enforcement:** `architecture-critic` verifies every cited `supporting_skill` name exists as a real file in the catalog (blocker severity). The `cc_feature` hallucination gate is unchanged — still validates against the taxonomy, not slugs.
-- **Collision handling:** skill-factory drafts that would overwrite an approved slug are a hard error. Resolution is either to qualify the new slug or revise the existing baseline.
-- **Drafter collision hint (v2.3.2):** `skill-drafter` reads `{catalog_root}/<slug>.md` before writing, and prepends a warning block to its confirmation output when an existing skill would be overwritten during manual `mv` promotion. The warning cites the existing file's `review_status` and suggests a qualified slug derived from the `concept` handle. The draft is still written to `.drafts/<slug>.md` — the check is a hint, not a block.
-
-Seeds v2.3.1: 11 skills across 8 features — one qualified pattern (`hooks-observability-pattern.md`, promoted from `ai-psychosis/README.md`, ngram-overlap 0.01, approved). Decision-layer intentionally empty pending skill-factory Fase 2.
+No code-level dependency between plugins — the contract is filesystem-level only.
 
 ## State
 
@@ -140,7 +127,7 @@ All artifacts in one project directory (default):
 - Project root: `.claude/projects/{YYYY-MM-DD}-{slug}/`
   - `brief.md` (task brief from `/ultrabrief-local`)
   - `research/{NN}-{slug}.md` (research briefs from `/ultraresearch-local --project`)
-  - `architecture/overview.md` + `architecture/gaps.md` (optional, v2.2, from `/ultra-cc-architect-local --project`)
+  - `architecture/overview.md` + `architecture/gaps.md` (opt-in, produced by the separate `ultra-cc-architect` plugin)
   - `plan.md` (from `/ultraplan-local --project`)
   - `sessions/session-*.md` (from `--decompose`)
   - `progress.json` (from `/ultraexecute-local --project`)
@@ -157,12 +144,11 @@ Stats:
 - Plan stats: `${CLAUDE_PLUGIN_DATA}/ultraplan-stats.jsonl`
 - Exec stats: `${CLAUDE_PLUGIN_DATA}/ultraexecute-stats.jsonl`
 - Research stats: `${CLAUDE_PLUGIN_DATA}/ultraresearch-stats.jsonl`
-- Architect stats: `${CLAUDE_PLUGIN_DATA}/ultra-cc-architect-stats.jsonl`
 
 ## Terminology
 
 - **Task brief** — produced by `/ultrabrief-local`. Declares intent, goal, and research plan. Drives planning.
 - **Research brief** — produced by `/ultraresearch-local`. Answers a specific research question. Feeds planning.
-- **Architecture note** — produced by `/ultra-cc-architect-local`. Proposes which Claude Code features fit the task with brief-anchored rationale + explicit gaps. Enriches planning.
+- **Architecture note** — opt-in, produced by `/ultra-cc-architect-local` from the separate `ultra-cc-architect` plugin. Proposes which Claude Code features fit the task with brief-anchored rationale + explicit gaps. When present, enriches planning.
 
 A project typically has 1 task brief, 0–N research briefs, and 0 or 1 architecture note.