- Context engine/plugins: stop rejecting third-party context engines whose `info.id` differs from the registered plugin slot id. The strict-match contract added in 2026.4.14 broke `lossless-claw` and other plugins whose internal engine id does not equal the slot id they are registered under, producing repeated `info.id must match registered id` lane failures on every turn. Fixes #66601. (#66678) Thanks @GodsBoy.

- Agents/compaction: rename embedded Pi compaction lifecycle events to `compaction_start` / `compaction_end` so OpenClaw stays aligned with `pi-coding-agent` 0.66.1 event naming. (#67713) Thanks @mpz4life.

- Security/dotenv: block all `OPENCLAW_*` keys from untrusted workspace `.env` files so workspace-local env loading fails closed for new runtime-control variables instead of silently inheriting them. (#473)

## 2026.4.20