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VCAL Semantic Cache v0.6.1 — Production Hardening

Release date: 2026-08-15

VCAL Semantic Cache v0.6.1 is a production-hardening release focused on persistence reliability, runtime security, API correctness, and container deployment behavior.

Highlights​

  • Hardened paired snapshot persistence and startup restore validation.
  • Added explicit VCAL_DATA_DIR handling and writable-storage validation.
  • Improved graceful shutdown and final snapshot handling.
  • Corrected public ef and atomic request-field handling.
  • Strengthened API-key comparison and vector-capacity enforcement.
  • Improved license handling and license-tier metrics.
  • Added newline-terminated JSON responses for cleaner CLI use.
  • Updated the container runtime hardening.

Persistence​

VCAL Semantic Cache continues to persist the paired snapshot set:

vcal.index
answers.json
tombstones.json

Startup now applies stricter validation to restored state, including configured vector dimensions and companion snapshot files. Graceful shutdown retains the final quiescent paired snapshot.

Deployment notes​

The default service port is 8084.

For persistent Docker bind mounts, ensure the configured data directory is writable by the container runtime user. Use VCAL_DATA_DIR to select the persistent storage path explicitly.

Validation​

The release was validated with Rust formatting, Clippy with warnings denied, tests, cargo audit, functional smoke tests, persistence/restart checks, and graceful shutdown verification.

For licensing, deployment, or support questions, use the VCAL contact page.