Echo6 infrastructure documentation

echo6-autocommit 6695fe7063 auto: docs sync 2026-08-03T12:00:05+00:00 ... Files changed: engine/changelog.md engine/lint-report.md		2026-08-03 12:00:05 +00:00
.claude	auto: docs sync 2026-06-29T00:00:11+00:00	2026-06-29 00:00:11 +00:00
engine	auto: docs sync 2026-08-03T12:00:05+00:00	2026-08-03 12:00:05 +00:00
vault	auto: docs sync 2026-07-18T12:00:17+00:00	2026-07-18 12:00:17 +00:00
, c.get(k)) PY \" "	auto: docs sync 2026-07-12T00:00:23+00:00	2026-07-12 00:00:23 +00:00
.gitignore	auto: docs sync 2026-06-18T18:00:10+00:00	2026-06-18 18:00:10 +00:00
CLAUDE.md	auto: docs sync 2026-06-19T06:00:06+00:00	2026-06-19 06:00:06 +00:00
credentials	auto: docs sync 2026-07-15T06:00:18+00:00	2026-07-15 06:00:18 +00:00