# Phase 178 Summary: Stable Literature-Stage Completion Recognition

**Status:** Done
**Date:** 2026-04-14
**Axis:** Axis 1 (layer-internal optimization) + Axis 2 (inter-layer connection)

## What was done

Phase `178` made the first fresh-topic `literature_intake_stage` durable
enough that it no longer repeats forever after one successful L1->L2 write to
staged `L2`.

### Fixes landed

- literature-intake candidate sets now carry a stable completion signature
- staged entries persist that signature in provenance so later queue
  regeneration can detect that the same bounded stage already landed
- runtime queue fallback now advances to `Inspect the current L2 staging
  manifest before continuing.` instead of repeating the same first L1->L2 step
- the literature-focused mode envelope now stays active for that staged-`L2`
  review surface

## Acceptance criteria

- [x] identical fresh-topic literature candidate sets no longer requeue the
      same `literature_intake_stage`
- [x] the first follow-through now advances to staged-`L2` review after a
      successful stage
- [x] focused service and runtime-script regressions cover the durable
      completion-recognition path

## Evidence

| Artifact | Location | Purpose |
|----------|----------|---------|
| `pytest-service-literature-stage.txt` | `phases/178-stable-literature-stage-completion-recognition/evidence/` | service-side literature-stage regression receipt |
| `pytest-runtime-stage-advance.txt` | `phases/178-stable-literature-stage-completion-recognition/evidence/` | runtime queue-advance regression receipt |
| `receipt.md` | `phases/178-stable-literature-stage-completion-recognition/evidence/` | human-readable summary of the stable follow-through repair |

## What this phase proved

1. One completed fresh-topic literature stage is now recognized durably across
   later queue regeneration.
2. The bounded route now advances to staged-`L2` review instead of pretending
   the first L1->L2 step still has not happened.
