---
title: "MGS7003: symbol index not current"
description: Fires when magus diff cannot bring the symbol index up to date for a project the change touched, so the conformance checks did not run and their silence means nothing was checked.
tags: [MGS7003, knowledge graph, symbol index, scip, conformance, diff, review]
---

# MGS7003: symbol index not current

The conformance checks in `magus diff` read the symbol index. Before they run,
magus brings the index of every project the change touched up to date, by
running that project's `scip` target through the run scheduler and the cache:
an index that is already current replays, and a stale one rebuilds only itself.

This code fires when that could not happen for one or more projects. The review
still lists every file, its role, reach and ownership, but the conformance
checks do not run, and each surface says so in their place: the `magus diff`
report, `--prompt`, the console, and the `conformance` section of the pull
request comment, which fails its step rather than reading as a change with
nothing to report.

## Why

A stale index answers questions about a tree that no longer exists. A new
function missing from it has no family to be compared against, so every check
would stay quiet, and quiet is exactly what a clean change looks like. The
review refuses to read one rather than report that absence as a result.

## Resolution

The message names each project and its cause.

- **The indexer is not installed** (`scip-go`, `scip-typescript`, and so on).
  Install the one the message names, then run `magus graph build`.
- **The indexer failed.** Run `magus run <project>::scip` to see its output,
  fix what it reports, then rerun the review.
- **Cache writes are off** (`cache.write.enabled: false`, or
  `MAGUS_CACHE_WRITE_ENABLED=false`). The indexer ran, but the cache recorded
  nothing to vouch for what it wrote, so the index cannot be told apart from a
  stale one. Enable cache writes for the run that reviews. Without
  `MAGUS_CACHE_SIGNING_KEY` it still publishes nothing to a shared cache.
- **The cache could not be opened.** Check that the cache directory is
  writable, then rerun.