Robot Skill Hub 0.3.1 public preview

Preserves optional Python and CPU architecture within submitted environment combinations, and accepts exact positive JSON-safe artifact-size metadata without fetching the artifact. Intake requests remain limited to 16 KiB and publication still requires an internal draft PR and review.

Adds 99 pinned source references: 56 official training/inference/hardware workflow entrypoints and 43 GaP instruction documents. The inventory is 17 preparation recipes, 1,160 source references and 3 reviewed findings. Every new source remains not_run with no Hub preparation adapter; 11 conflicting upstream license declarations remain NOASSERTION/unverified. This is a finite source census.

Publishes complete provenance-manifest links alongside bounded search/findings discovery. Offline snapshots pin the actual 4608621 source commit and remain distinct from the online generation.

Validation: Linux Checks and Pages/index synchronization at 88022cc; 27 public HTTP checks; official MCP SDK 1.32.1 connection and three read-only tool calls; native Workers/D1 interoperability with the actual publisher output. No new robot, model, checkpoint or physical-hardware execution is claimed. Maintainer checks opt out of launch metrics.