v3.0.0b2

3.0.0b2 — 2026-07-14

Beta iteration: drops the local-download surface (a beta contract change) and fixes
source=gcs manifests.

Removed

• The local-download surface: POST /v3/download (REST) and the download_cohort MCP tool
  (beta contract change). Both only worked when the server ran on the caller's own machine and
  errored everywhere else — on the hosted deployment (the common case) the tool's mere presence
  misled agents into calling it. Downloading through the server is also never the right path:
  every IDC bucket is public, so direct S3/GCS transfer is strictly more efficient. Retrieval is
  now manifests/URLs only on every surface — use get_cohort_urls / POST /v3/cohort/manifest.txt
  or the ready-to-run idc CLI commands in the build_cohort response. The
  IDC_API_ENABLE_LOCAL_DOWNLOAD config variable is gone with it.

Fixed

• get_cohort_urls / POST /v3/cohort/manifest.txt with source=gcs now return s3:// URLs
  (GCS's S3-compatible endpoint) instead of gs:// URLs. This matches how idc-index itself
  reaches GCS, and fixes a real breakage: idc download-from-manifest only recognizes s3://
  lines in a manifest file, so a saved gs:// manifest silently downloaded nothing.