# Swarm-Scale Optimization Program Closeout Audit

Date: 2026-05-04
Epic: `beads_rust-72yf`
Agent: `PinkTiger`

## Objective Restatement

The user asked to apply `extreme-software-optimization`,
`alien-artifact-coding`, `alien-graveyard`, and `idea-wizard` to make
`beads_rust` dramatically more compelling for massive agent swarms on
64+ CPU / 256GB+ RAM machines, with world-class responsiveness and resource
utilization.

Concrete deliverables implied by that prompt:

1. Run the idea-wizard process end-to-end: generate a broad idea pool, winnow it,
   expand with next-best ideas, operationalize them into beads, refine the plan,
   and execute the ready work.
2. Apply profile-first optimization discipline: every accepted performance claim
   needs baseline evidence, golden/parity output, resource/timing data, and a
   single-lever explanation or a documented no-go.
3. Apply alien-artifact / alien-graveyard ideas as practical artifacts, not
   ornamental theory: proof obligations, fallback policies, decision evidence,
   queueing/control/graph/cache/concurrency primitives, and transparent
   acceptance or rejection criteria.
4. Improve the actual system surface used by agents: CLI read paths, scheduler,
   sync/import/export, MCP tools, output streaming, cache/projection policy,
   contention/replay tooling, and operator docs.
5. Verify the work against high-core/high-RAM swarm constraints, including
   64-agent scenarios, large synthetic corpora, and conservative fallback paths.

## Prompt-To-Artifact Checklist

| Requirement | Evidence |
| --- | --- |
| Use `idea-wizard` through all phases | Epic `beads_rust-72yf` records Phase 1 context, a 30-idea pool, top 5, next 10, and a 46-child executable bead graph. |
| Create self-contained beads with dependencies | Pre-close `br epic status --json` reported `total_children=46`, `closed_children=46`, `eligible_for_close=true`; `bv --robot-insights | jq '.Cycles'` returned `null`. After closing the epic, `br epic status --json` returns `[]` because there are no open epics left. |
| Apply `extreme-software-optimization` | Accepted and rejected slices include hyperfine/time/RSS/strace/golden evidence in `tests/artifacts/perf/beads-perf-20260503T-*` and `tests/artifacts/perf/beads-perf-20260504T-*`. No-go slices are closed as measured rejections, not silently kept. |
| Apply `alien-artifact-coding` | `src/policy.rs` sequential drift guard, scheduler evidence, capacity report, and proof/de-scope artifacts use explicit proof obligations, fallback policy, and decision evidence. |
| Apply `alien-graveyard` | Shipped or evaluated S3-FIFO, seqlock-style startup cache, write-combining / flat-combining design, Merkle witnesses, morsel-style export preparation, graph projection, queueing/capacity planning, and adaptive controller guards. |
| Massive-agent / 64-core focus | `docs/SWARM_SCALE_TUNING.md`, 64-worker contention replay/projection, NUMA read-command profile, scheduler swarm evidence, and capacity planning report. |
| 256GB+ RAM / high-core host proof | `tests/artifacts/perf/beads-perf-20260504T-numa-read-command-profile/env.json` captures a 536GB memory host profile; `beads-perf-20260504T-swarm-capacity-planning/report.md` derives high-core/laptop concurrency bands. |
| Large-workspace proof | Synthetic corpus generator supports million-issue and 10,000-agent profiles; the program's main measured corpus uses a documented 12k issue/comment-heavy bound with extrapolation and resource evidence. |
| User-visible responsiveness | Read/scheduler/list/search/stats/count/TOON/MCP paths received measured fast paths or no-go artifacts. |
| Sync/import/export ceiling | Merkle witnesses, parallel export preparation, import fast paths, and explicit import-parallelism de-scope artifact. |
| Conservative fallback | Witness/export serial fallbacks, policy fail-closed behavior, MCP legacy single-call preservation, cache-off/direct-path parity, and no-go reverts are all documented. |

## Closed Work Graph Summary

High-level program beads closed:

- `beads_rust-72yf.1`: performance evidence ledger and tail gates.
- `beads_rust-72yf.2`: deterministic 64-agent contention and replay lab.
- `beads_rust-72yf.3`: hot read-only snapshot / CLI fast-open proof.
- `beads_rust-72yf.4`: adaptive swarm-ready scheduler.
- `beads_rust-72yf.5`: JSONL Merkle/export work, with import parallelism de-scoped to `fsqlite`.
- `beads_rust-72yf.6`: optimistic route/config startup cache.
- `beads_rust-72yf.7`: bounded S3-FIFO policy and replay evidence.
- `beads_rust-72yf.8`: write-combining design/prototype and 64-agent projection.
- `beads_rust-72yf.9`: streaming JSON/TOON output work.
- `beads_rust-72yf.10`: materialized graph projections.
- `beads_rust-72yf.11`: synthetic million-issue / 10,000-agent corpus generator.
- `beads_rust-72yf.12`: bounded adaptive-controller policy format.
- `beads_rust-72yf.13`: MCP batch APIs.
- `beads_rust-72yf.14`: storage-open cold-start matrix.
- `beads_rust-72yf.15`: 256GB / 64-core tuning guide.
- `beads_rust-72yf.16` through `.38`: focused measured optimization and no-go passes over count, ready, scheduler, TOON, label/search/list/stats paths.
- `beads_rust-72yf.39`: NUMA/high-core read profile.
- `beads_rust-72yf.40`: sequential drift guard.
- `beads_rust-72yf.41`: swarm capacity-planning report.
- `beads_rust-72yf.42`: correctness fix found during final sync/import audit.

## Representative Artifacts

Core swarm/operator artifacts:

- `docs/SWARM_SCALE_TUNING.md`
- `docs/WRITE_COMBINING_QUEUE_DESIGN.md`
- `tests/artifacts/perf/beads-perf-20260504T-numa-read-command-profile/manifest.json`
- `tests/artifacts/perf/beads-perf-20260504T-swarm-capacity-planning/report.md`
- `tests/artifacts/perf/beads-perf-20260504T-jsonl-pipeline-closeout-audit/summary.md`
- `tests/artifacts/perf/beads-perf-20260504T-jsonl-import-descope/summary.md`

Representative accepted perf artifacts:

- `tests/artifacts/perf/beads-perf-20260503T-startup-cache/summary.md`
- `tests/artifacts/perf/beads-perf-20260504T-parallel-jsonl-export/summary.md`
- `tests/artifacts/perf/beads-perf-20260504T-new-issue-relation-insert/summary.md`
- `tests/artifacts/perf/beads-perf-20260504T-label-filtered-search/final/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-redundant-label-filter/final/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-list-large-page-fullscan/final/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-stats-label-breakdown/final/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-scheduler-materialization/summary.md`

Representative no-go / rollback artifacts:

- `tests/artifacts/perf/beads-perf-20260504T-single-label-page-hydration/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-single-label-topk-projection/README.md`
- `tests/artifacts/perf/beads-perf-20260504T-jsonl-import-descope/summary.md`
- `tests/artifacts/perf/beads-perf-20260504T-toon-length-pass/summary.md`

## Verification Snapshot

Commands run during the final closeout window:

```bash
br epic status --json
bv --robot-insights | jq '.Cycles'
env CARGO_TARGET_DIR=/data/tmp/cargo_target_beads_rust_pinktiger_72yf5_audit \
  cargo test --test e2e_basic_lifecycle e2e_sync_witness -- --nocapture
env CARGO_TARGET_DIR=/data/tmp/cargo_target_beads_rust_pinktiger_72yf5_audit \
  cargo test --test e2e_basic_lifecycle \
    e2e_sync_flush_export_parallelism_preserves_jsonl_bytes -- --nocapture
env CARGO_TARGET_DIR=/data/tmp/cargo_target_beads_rust_pinktiger_72yf5_audit \
  cargo test --lib parallel_witness -- --nocapture
env CARGO_TARGET_DIR=/data/tmp/cargo_target_beads_rust_pinktiger_72yf51_release \
  cargo build --release
/usr/bin/time -v \
  /data/tmp/cargo_target_beads_rust_pinktiger_72yf51_release/release/br \
  --db /data/tmp/br-jsonl-import-descope-current-20260504-EBgRQt/.beads/beads.db \
  sync --import-only --force --json
```

Observed closeout results:

- Pre-close `br epic status --json`: `total_children=46`, `closed_children=46`,
  `eligible_for_close=true`.
- `bv --robot-insights | jq '.Cycles'`: `null`.
- Focused witness/export parity tests: passed.
- Current release 12k JSONL import probe: imported 12,000 records, dirty count
  0, expected JSONL hash, healthy doctor checks.
- Post-close state: `br ready --json`, `br list --status open --json`, and
  `br list --status in_progress --json` all returned empty result sets; current
  `br epic status --json` returns `[]`.

## Known Boundaries

This program intentionally did not pretend every speculative idea should ship.
Several candidates were rejected after measurement and reverted. The most
important boundary is JSONL import parallelism: `beads_rust` now has a
proof-backed de-scope showing the remaining import parallelism lever belongs in
`fsqlite` / VDBE / storage bulk DML, not in another planner-level parallel pass.

Runtime production wiring for write-combining remains future work; the current
deliverable is a design/prototype foundation with projection evidence and a
conservative one-command-per-lock fallback.

## Audit Verdict

The prompt requirements are satisfied for this `beads_rust` program:

- The idea-wizard plan was created and executed through a 46-child graph.
- The accepted code changes and artifacts are profile/evidence-backed.
- The alien-artifact and alien-graveyard concepts were compiled into concrete
  policies, caches, witnesses, schedulers, reports, and fallback contracts.
- The program directly targets high-core/high-RAM swarm operation with concrete
  CLI/MCP/read/sync/scheduler/user-facing improvements.
- Remaining speculative work is either rejected with evidence or explicitly
  de-scoped to a lower layer.
