# Phase 172.2 Summary: HS Positive Replay And HS Negative Coexistence Closure

**Status:** Done
**Date:** 2026-04-14
**Axis:** Axis 4 (human evidence) + Axis 5 (agent-facing roadmap clarity)

## What was done

Phase `172.2` closed milestone `v1.98` at the phase level.

### Replay closure

- added `run_hs_positive_negative_coexistence_acceptance.py` as the isolated HS
  coexistence replay wrapper
- reran the HS positive authoritative-L2 landing through that wrapper
- proved the shipped HS negative comparator stays staged and visible on the
  same compiled and consultation surfaces

### Deferred-lane routing

- wrote explicit carry-over notes for the deferred `LibRPA QSGW`
  first-principles / code-method lane
- made the three-lane convergence explicit:
  - pure formal theory baseline: closed in `v1.97`
  - toy-model positive baseline: closed in `v1.98`
  - first-principles / large-codebase lane: still deferred

## Acceptance criteria

- [x] One replayable acceptance lane proves the authoritative HS positive claim and staged HS negative comparator coexist honestly
- [x] Compiled knowledge report preserves positive authoritative state and negative contradiction-watch state
- [x] `consult-l2(..., include_staging=True)` surfaces both sides without authority drift
- [x] One replay runbook explains how to re-run the coexistence proof
- [x] Deferred `LibRPA QSGW` blockers and next actions are written explicitly

## Evidence

| Artifact | Location | Purpose |
|----------|----------|---------|
| `hs-positive-negative-coexistence-acceptance.json` | `phases/172.2-hs-positive-replay-and-hs-negative-coexistence-closure/evidence/` | Raw coexistence payload with positive row, negative row, compiled report, and consultation ids |
| `pytest-hs-coexistence-script.txt` | `phases/172.2-hs-positive-replay-and-hs-negative-coexistence-closure/evidence/` | Isolated runtime-script receipt for the HS coexistence wrapper |
| `deferred-lane-routing.md` | `phases/172.2-hs-positive-replay-and-hs-negative-coexistence-closure/evidence/` | Explicit blockers and next actions for the deferred `LibRPA QSGW` lane |
| `receipt.md` | `phases/172.2-hs-positive-replay-and-hs-negative-coexistence-closure/evidence/` | Human-readable replay receipt with commands and key coexistence states |

## Key verified facts

- Positive claim id: `claim:hs-like-chaos-window-finite-size-core`
- Negative staged row id: `staging:hs-model-otoc-lyapunov-exponent-regime-mismatch`
- Positive knowledge report state: `authoritative_canonical / trusted`
- Negative knowledge report state: `non_authoritative_staging / contradiction_watch`
- Coexistence query:
  `HS-like finite-size chaos window robust core OTOC Lyapunov exponent regime mismatch`

## What this phase proved

1. The bounded HS positive authoritative claim and the shipped HS negative
   comparator can now coexist honestly on the same repo-local compiled and
   consultation surfaces.
2. The toy-model lane is no longer only a one-off promotion success; it is now
   mechanically replayable together with its natural negative honesty check.
3. The next unfinished user-requested lane is now cleanly isolated to
   `LibRPA QSGW` and related first-principles / large-codebase ingestion work.

## Milestone status

All three phases of milestone `v1.98` are now complete. The next GSD step is
milestone lifecycle handling: audit, complete, and archive.
