SCIP index generated but backend reports 'Index not found'

[SimplyLiz]

Problem

After running ckb index --lang typescript, the index is generated successfully:

Generating SCIP index...
Done! Indexed in 0.8s
Index: /Users/lisa/Work/Projects/UltraContext/uc-fork/index.scip (0.43 MB)

Full code intelligence now available:
  findReferences - Find all usages of a symbol
  getCallGraph   - Trace caller/callee relationships
  analyzeImpact  - Assess change impact

Tier Status:
  TypeScript: enhanced tier
  Capabilities: definitions, references, callgraph, type-info

However, ckb status immediately after shows the SCIP backend as unavailable:

{
  "id": "scip",
  "available": false,
  "healthy": false,
  "healthTier": "unavailable",
  "details": "Index not found. Run SCIP indexer to create.",
  "remediation": "Run 'ckb index' to generate SCIP index for code intelligence"
}

The index file exists on disk (index.scip, 0.43 MB) and status reports the index as fresh:

{
  "index": {
    "exists": true,
    "fresh": true,
    "indexAge": "just now",
    "commitsBehind": 0
  }
}

Impact

• searchSymbols falls back to treesitter and finds symbols, but the stable IDs it returns can't be resolved by any other tool
• getSymbol, getCallGraph, findReferences, understand all fail with SYMBOL_NOT_FOUND for IDs returned by searchSymbols
• explore runs at ~40% capability (git-only), no symbol-level analysis
• Effectively all SCIP-dependent features are broken despite a successful index run

Reproduction

cd <typescript-monorepo-with-packages>
ckb index --lang typescript  # succeeds, writes index.scip
ckb status                   # reports scip backend unavailable

Environment

• CKB version: 8.1.0 (from explore output)
• Project: TypeScript monorepo with packages (tsconfig.json in subdirectories, not root)
• Indexer: scip-typescript (scip-typescript index --infer-tsconfig)
• OS: macOS Darwin 25.1.0

Expected

After a successful ckb index, the SCIP backend should be available and symbol resolution should work.