# Phase 15: Graph Intelligence And Synthesis Closeout

Status: Implemented

## Goal

Use the pack-aware truth graph as a substrate for cluster discovery, local graph drill-down, and deterministic synthesized research reading surfaces.

## Delivered

- pack-aware truth substrate for graph projections inside a shared `knowledge.db`
- multi-pack truth projection coexistence without `research-tech` overwriting other pack rows
- graph cluster browser surface
- graph cluster detail surface
- deterministic cluster synthesis summaries
- compiled cluster overview pages
- compiled cluster crystal pages
- structural cluster labels
- relation pattern summaries
- review pressure drill-down:
  - open contradictions
  - stale summaries
- related cluster neighborhood surfacing
- bridge kinds and bridge bands for cluster-to-cluster explanation
- neighborhood grouping by bridge kind
- deterministic next-read routing
- deterministic reading routes with:
  - route rank
  - route score
  - route reason
- browser-level surfacing of:
  - top reading route
  - route availability
  - reading intent count / preview

## Exit Condition Check

Milestone 10 required:

- community detection over objects and relations
- cluster labels and topic maps
- cross-domain connection surfacing
- crystal-like synthesized reference views
- visual/query surfaces that explain why items belong together

This is now satisfied for the current `research-tech` pack because:

- graph clusters are materialized from pack-owned graph seed projections
- `/clusters` and `/cluster` provide live graph browsing and local subgraph drill-down
- `overview/clusters` and `cluster/crystal` provide compiled synthesis artifacts
- related clusters, bridge kinds, neighborhood groups, and reading routes explain why clusters belong together
- all synthesis stays source-cited through existing provenance, review pressure, source-note coverage, and atlas-page coverage

## Explicit Deferrals

These are not Phase 15 blockers:

- global infinite-canvas graph UI
- model-generated cluster narratives
- multi-hop route planning across more than one neighbor step
- generalized cross-pack graph semantics shared across domains
- richer graph semantics beyond the current pack-owned seed model

## Phase 16 Entry

Phase 16 should start from a closed assumption:

- Phase 15 already delivered a usable deterministic graph intelligence layer for `research-tech`
- further graph work is optional enhancement, not a prerequisite for the next phase

If Phase 16 needs graph data, it should consume the existing pack-aware cluster and crystal surfaces instead of reopening Phase 15 scope.
