docs: boocode-lift-analysis, openspec change docs, codesight cache, deps

- Add boocode-lift-analysis.md: comprehensive 30-repo lift matrix across 25 domains
- Add openspec/ change docs: domain2-code-intelligence, domain3-multi-agent, impeccable-wave, streaming-codeblocks
- Update .gitignore: .impeccable/, .omo/, bun.lock, DESIGN.md, PRODUCT.md
- Update dependencies in package.json + pnpm-lock.yaml
- Update .codesight/ analysis cache

openspec/changes/domain3-multi-agent/proposal.md

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+# Domain 3 — Multi-Agent Orchestration
+
+**Status:** Proposed
+**Depends on:** v2.7.17-orchestrator, v2.8.13-model-resolution-matcher, v2.8.17-boulder-state
+
+## Why
+
+BooCode's conductor runs sequential analysis flows on local Qwen with a static wave scheduler. Each step is a linear dependency chain. This works for simple analysis flows but misses 8 concrete improvements identified in the lift analysis (boocode-lift-analysis.md Domain 3).
+
+DO_WHILE loops, SWITCH branching, FORK_JOIN parallel execution, a formal task state machine, declarative DAGs, parallel batch execution, and a structured phased lifecycle would make the conductor a true multi-agent workflow engine.
+
+## What Changes
+
+### Phase 1: Flow state machine + branching (high confidence)
+
+1. Task state machine — Add formal states: SCHEDULED → IN_PROGRESS → COMPLETED/FAILED/TIMED_OUT with retriable flag. Currently steps just have running/completed/failed/cancelled.
+
+2. DO_WHILE loop step — Re-runs a sub-step until a condition is met. while(condition) guard on step definition.
+
+3. SWITCH branch step — cases: [{ when: condition, steps: [...] }]. First matching case executes.
+
+4. FORK_JOIN step — Fans out to N parallel sub-steps and synchronizes at a Join point. All branches must complete before the flow advances.
+
+### Phase 2: Declarative DAGs (medium confidence)
+
+5. JSON DAG format — Optional JSON-based flow definition alongside existing TypeScript Step[] arrays. LLM-friendly, versioned, loadable from disk.
+
+### Phase 3: Batch execution + lifecycle (lower confidence)
+
+6. Parallel batch execution — Independent tasks within a flow run concurrently. Uses existing dispatcher's task queue — launch multiple tasks at once.
+
+7. Structured phased lifecycle — ticket → research → plan → execute → commit → review as a template flow definition.
+
+## Non-Goals
+- No replacement of existing flow engine — additive changes only
+- No Paseo daemon integration (handled by omo-paseo-bridge)
+- No inter-agent messaging (Domain 4)
+
+## Capabilities
+
+### New Capabilities
+- DO_WHILE step type — repeat sub-steps until condition met
+- SWITCH step type — conditional branching by case
+- FORK_JOIN step type — parallel fan-out with Join sync
+- Retriable task flag — auto-retry failed steps up to N times
+- JSON DAG format — portable flow definitions
+- Phased lifecycle template — ticket-to-review reference flow
+
+### Modified Capabilities
+- Step kind: gains 'do_while', 'switch', 'fork_join'
+- Flow runner: wave scheduler handles branching + parallel branches