## Summary
- Adds `releases/v2026.525.0.md` for the upcoming stable release
covering 32 commits since `v2026.517.0` (2026-05-17 → 2026-05-25).
- Highlights: Modal sandbox provider plugin, first-party workspace diff
viewer, routine env secrets, local Cloud Upstream sync, and ACPX-Claude
adapter polish.
- Categorized into Highlights / Improvements / Fixes with inline PR +
contributor attribution per the release-changelog skill.
## Source range
`v2026.517.0..origin/master` (ECE8A51E22 at time of cut).
## Verification
- Manual scan of `git log v2026.517.0..HEAD --no-merges` and merged-PR
titles since 2026-05-17.
- Confirmed no `BREAKING CHANGE:` / `feat!:` markers in the range (no
Breaking Changes / Upgrade Guide sections needed).
- DB migrations in range (`0086_routine_env_runtime_contract`,
`0087_backfill_environment_manage_human_defaults`,
`0088_backfill_principal_access_compatibility`, `0089_cloud_upstreams`)
are additive/backfill-only — none flagged as breaking.
- Contributor list excludes Paperclip founders (cryppadotta, devinfoley)
and bot accounts per skill rules.
## Test plan
- [ ] Reviewer eyeballs the changelog against the recent PR list.
- [ ] Reviewer confirms the highlight set is the right shipped subset.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Paperclip <noreply@paperclip.ing>
Dotta