feat(ultraplan-local): v2.1.0 — dynamic quality-gated interview

Replace hardcoded Q1-Q8 in /ultrabrief-local with a section-driven
completeness loop (Phase 3) and a draft/review/revise loop with
brief-reviewer as stop-gate (Phase 4). Quality drives the interview,
not a question counter.

brief-reviewer now emits a machine-readable JSON block with per-dimension
scores (1-5) and detail arrays alongside the existing prose report;
planning-orchestrator continues to consume the prose verdict unchanged.

Phase 4 gate: all dimensions >= 4 AND research_plan = 5. On fail, a
targeted follow-up is generated from the weakest dimension's detail
field and the draft is re-reviewed. Max 3 review iterations bound cost;
exhaustion writes brief.md with brief_quality: partial and an explicit
Brief Quality section. Force-stop surfaces per-dimension findings before
the user chooses continue or partial.

Not breaking. /ultrabrief-local [--quick] <task> interface unchanged.
--quick now means compact start with escalation, not a max-N cap.

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

README.md

@@ -61,20 +61,20 @@ Key commands: `/config-audit posture`, `/config-audit feature-gap`, `/config-aud
 
 ---
 
-### [Ultra {brief | research | plan | execute} - local](plugins/ultraplan-local/) `v2.0.0`
+### [Ultra {brief | research | plan | execute} - local](plugins/ultraplan-local/) `v2.1.0`
 
 Deep requirements gathering, research, implementation planning, and self-verifying execution with specialized agent swarms, adversarial review, and failure recovery.
 
 Four commands, one pipeline with clear division of labor:
 
-- **`/ultrabrief-local`** — Capture intent. Interactive interview (3-8 adaptive questions) produces a task brief with explicit research plan. Identifies research topics with copy-paste-ready `/ultraresearch-local` commands. Optional auto-orchestration runs research + planning in foreground. Always interactive.
+- **`/ultrabrief-local`** — Capture intent. Dynamic, quality-gated interview: a section-driven completeness loop (Phase 3) followed by a `brief-reviewer` stop-gate (Phase 4, max 3 review iterations). Required sections must reach an initial-signal gate AND pass review across completeness, consistency, testability, scope clarity, and research-plan validity before `brief.md` is written. Identifies research topics with copy-paste-ready `/ultraresearch-local` commands. Optional auto-orchestration runs research + planning in foreground. Always interactive.
 - **`/ultraresearch-local`** — Gather context. Deep multi-source research with triangulation: 5 local agents + 4 external agents + Gemini bridge, producing structured briefs with confidence ratings. Makes no build decisions.
 - **`/ultraplan-local`** — Transform intent into an executable contract. Per-step YAML manifests (`expected_paths`, `commit_message_pattern`, `bash_syntax_check`). Plan-critic is a hard gate on manifest quality. Requires a task brief as input (`--brief` or `--project`).
 - **`/ultraexecute-local`** — Execute the contract disciplined. Manifest-based verification, independent Phase 7.5 audit from git log + filesystem (ignores agent bookkeeping), Phase 7.6 bounded recovery dispatch for missing steps. Step 0 pre-flight catches sandbox push-denial before any work. `--validate` mode offers a fast schema-only sanity-check between planning and execution.
 
 All artifacts land in one project directory: `.claude/projects/{YYYY-MM-DD}-{slug}/` contains `brief.md`, `research/NN-*.md`, `plan.md`, `sessions/`, and `progress.json`. `--project <dir>` works across `/ultraresearch-local`, `/ultraplan-local`, and `/ultraexecute-local`.
 
-v2.0 extracts interview from planning: briefs are now reviewable artifacts with explicit intent, research plan, and falsifiable success criteria — each a contract that downstream agents (`brief-reviewer`, `plan-critic`, `scope-guardian`) can validate independently. Breaking change: `/ultraplan-local` no longer runs an interview and requires `--brief` or `--project`. See `plugins/ultraplan-local/MIGRATION.md`.
+v2.1 (non-breaking) replaces the hardcoded Q1–Q8 interview with a dynamic, quality-gated loop; `brief-reviewer` now emits machine-readable per-dimension JSON scores so `/ultrabrief-local` can use it as an internal stop-gate. v2.0 extracts the interview from planning: briefs are reviewable artifacts with explicit intent, research plan, and falsifiable success criteria — each a contract that downstream agents (`brief-reviewer`, `plan-critic`, `scope-guardian`) can validate independently. v2.0 is breaking: `/ultraplan-local` no longer runs an interview and requires `--brief` or `--project`. See `plugins/ultraplan-local/MIGRATION.md`.
 
 v1.7 self-verifying chain (preserved): a step may not be marked `completed` unless its manifest verifies. v1.8 Opus 4.7 literalism fixes (preserved): literal Step+Manifest template, forbidden narrative headers, schema self-check.