DevCake v0.6.4

Patch release in the v0.6 "Kentucky Butter" line. devcake-cli stays at 0.1.8.

Routed discoveries reach the mission they were sent to, in full. A leads delivery used to carry short excerpts of each finding, and a long one carried nothing but a pointer to a file on the source mission that the recipient's Dev never receives. The delivery's record now carries every finding in full, with no inline ceiling; the head quotes an excerpt of each. The recipient's Dev reads them from its own activity folder.

One place to read a mission's discoveries. The status comment's fold gains a Discoveries section: what the mission reported, with the record-file link, and every lead it received, in full. It is a view over the feed with no marker, no file token and no provenance line, so nothing that scans the feed counts it, the freshness check ignores it, and no Dev sees it. The status refresh now reads the feed once and the record push at the same boundary reuses that read.

Upgrading a host.

devcake up --release

Full detail: CHANGELOG.md and the living log in docs/16-roadmap.md.