feat(wave16): 5 parallel agents — ledger v6 + prune dedupe + brain-view clusters + fork-watch hook + three-role pipeline
51 crates, 753 tests green (up from 744 at v0.32.0).
All 5 agents launched in parallel via substrate composed prompts. Zero
file conflicts between scopes.
## A. kei-ledger v6 — 3 performance indexes + fork_transactional API
- idx_agents_started_ts, idx_agents_status, idx_agents_fork_parent_id
- fork_transactional<F>(): atomic fork row + caller side-effect
closes kei-fork ↔ ledger transactional gap (Wave 15 known issue)
- 30 tests (was 23)
## B. kei-prune dedupe — cluster-based retirement via kei-dna-index
- dedupe_candidates() via kei_dna_index::cluster_by(Scope)
- dedupe_strict() — intersection of scope+body clusters
- apply_retirements() reuses mark_retired
- CLI: kei-prune dedupe [--strict] [--dry-run]
- 17 tests (was 9)
## C. kei-brain-view clusters — stats + cluster visualization
- render_clusters(by: ClusterBy) — indented tree output
- render_summary() — 6-line dashboard from kei-dna-index::stats
- CLI: kei-brain-view clusters --by scope|body|role; kei-brain-view summary
- 15 tests (was 8)
## D. kei-fork watch-hook — auto-collect on .DONE marker
- watch_loop() — kei-watch subscription + auto kei-fork collect
- hooks/fork-collect-on-done.sh — foreground daemon wrapper
- dedupe via HashSet + agent_id validation
- 21 tests (was 13)
## E. three-role pipeline (Writer → Auditor → Merger)
- _roles/auditor.toml (pipeline.handoff=["merger"], claude-subagent-type=critic)
- _roles/merger.toml (leaf, git-ops scoped, infra-implementer)
- 5 new capability fragments: policy/git-ops-scope, scope/read-only,
output/verdict, output/merge-result, verify/fork-audit
- kei-spawn: pipeline_from_role + emit_pipeline_json + scaffold_downstream_tasks
- kei-spawn: precedent::run_advisory (env-gated KEI_SPAWN_PRECEDENT_CHECK)
- CLI: kei-spawn spawn --pipeline
- 19 tests (was 10)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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