feat(ultraplan-local)!: v2.0.0 — brief-driven four-command pipeline

Extract interview from /ultraplan-local into new /ultrabrief-local command.
/ultraplan-local now requires --brief or --project (breaking). All pipeline
artifacts land in one project directory: .claude/projects/{date}-{slug}/
with brief.md, research/, plan.md, sessions/, progress.json.

Breaking changes:
- /ultraplan-local requires --brief <path> or --project <dir>
- /ultraplan-local --spec removed (convert specs to briefs per MIGRATION.md)
- Interview phase moved to /ultrabrief-local
- spec-reviewer renamed to brief-reviewer with 5th dimension (Research Plan validity)

Added:
- /ultrabrief-local command (interactive interview → brief.md with research plan)
- templates/ultrabrief-template.md (task brief format with intent + research plan)
- brief-reviewer agent (5-dimension brief quality review)
- --project <dir> flag on /ultraresearch-local, /ultraplan-local, /ultraexecute-local
- MIGRATION.md (v1 → v2 upgrade guide)

Changed:
- planning-orchestrator accepts Brief file: input (was Spec file:)
- planning-orchestrator Phase 1b uses brief-reviewer
- README + CLAUDE.md rewritten for four-command pipeline and task/research brief terminology
- CHANGELOG.md [2.0.0] entry with rationale
- Marketplace root README + CLAUDE.md updated to v2.0.0

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

README.md

@@ -61,27 +61,30 @@ Key commands: `/config-audit posture`, `/config-audit feature-gap`, `/config-aud
 
 ---
 
-### [Ultra {research | plan | execute} - local](plugins/ultraplan-local/) `v1.8.0`
+### [Ultra {brief | research | plan | execute} - local](plugins/ultraplan-local/) `v2.0.0`
 
-Deep research, implementation planning, and self-verifying execution with specialized agent swarms, adversarial review, and failure recovery.
+Deep requirements gathering, research, implementation planning, and self-verifying execution with specialized agent swarms, adversarial review, and failure recovery.
 
-Three commands, one pipeline with clear division of labor:
+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.
 - **`/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. Accepts research briefs via `--research`.
+- **`/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.
 
-v1.7 self-verifying chain: a step may not be marked `completed` unless its manifest verifies. The executor's last tool call before reporting must be a manifest check, not an arbitrary file review — preventing hallucinated completion.
+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`.
 
-v1.8 closes the Opus 4.7 prompt-literalism gap: planning-orchestrator now emits a literal copyable Step+Manifest template (not prose rules), explicitly forbids narrative `Fase/Phase/Stage` headers, and runs a schema self-check before handing off to plan-critic. Prevents the "plan generated, executor rejects" loop observed when 4.7 inferred the v1.7 schema from prose descriptions alone.
+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`.
+
+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.
 
 Defense-in-depth security: plugin hooks block destructive commands and sensitive path writes, prompt-level denylist works in headless sessions, pre-execution plan scan catches dangerous commands before they run, scoped `--allowedTools` replaces `--dangerously-skip-permissions` in parallel sessions.
 
-Modes: default, spec-driven, research-enriched, foreground, quick, decompose, export
+Modes: default, brief-driven, project-scoped, research-enriched, foreground, quick, decompose, export
 
-19 specialized agents · 3 commands · 2 security hooks · No cloud dependency
+19 specialized agents · 4 commands · 2 security hooks · No cloud dependency
 
-→ [Full documentation](plugins/ultraplan-local/README.md)
+→ [Full documentation](plugins/ultraplan-local/README.md) · [Migration guide](plugins/ultraplan-local/MIGRATION.md)
 
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