v0.1.21

Highlights

• binary-safe artifact uploads, downloads, and metadata across the SDK, portal, and shared files browser
• portal/TUI file handling updates including binary placeholder previews, linked-item URL opening, and artifact delete flows
• longer default cron cadences for built-in system agents plus owner-filter guardrails for autonomous system-session discovery
• refreshed changelog, READMEs, builder-template docs, and sample docs for the v0.1.21 surface

Verification

• npm run build
• npm install --package-lock-only
• npm pack --dry-run --json for pilotswarm-sdk, pilotswarm-cli, and pilotswarm-web
• full test suite not rerun in this release step at operator request; user reported tests were already run