# Phase 42 Summary

Status: implemented on `codex/aitp-v137-v142-remediation`

## Goal

Strengthen `L0` source identity and citation/source-neighbor signals so later
layers can reuse literature context more like a real collaborator.

## What Landed

- stronger source-identity and source-intelligence support across the runtime
  stack
- richer citation/source-neighbor signals exposed through `L0` projections
- source-backed regressions and schema/runtime coverage updated to match the
  stronger `L0` contract
- integrated regression slice green inside the remediation worktree

## Verification

- `python -m pytest research/knowledge-hub/tests/test_aitp_service.py research/knowledge-hub/tests/test_aitp_cli.py research/knowledge-hub/tests/test_aitp_cli_e2e.py research/knowledge-hub/tests/test_runtime_profiles_and_projections.py research/knowledge-hub/tests/test_schema_contracts.py research/knowledge-hub/tests/test_l2_graph_activation.py research/knowledge-hub/tests/test_topic_start_regressions.py -q`
  - result: passed

## Outcome

Phase `42` is complete on this branch.
The next active milestone step is Phase `43` `assumption-and-regime-intake`.
