Remove genuinely-stale docs (decision/evidence now elsewhere):
- TRUSS-SPAWN-ANALYSIS.md — debug trace of a jail-spawn bug that was fixed
- PLAN-MOTHER-MCP-VAULT-KEYS.md — planned a vaultwarden-pubkey exchange; the
shipped mother MCP is seed-based (wiki/mother-hive + MOTHER-SETUP)
- PRIORITY-HANDOFF-ISO-SPAWN-COST.md — self-superseded by MULTI-AGENT-HOST-PLAN
Repointed referrers (README, AGENTS, FREEBSD-BUILD-LANE-HANDOFF, docs/README)
to MULTI-AGENT-HOST-PLAN. Fixed the wiki ADR note (the stale 'referenced in
stage-colibri-iso.sh' claim — those refs were already cleaned up).
KEPT the two design docs (COLIBRI-JAILED-AGENT-SPAWN-DESIGN,
COLIBRI-EXTERNAL-MCP-PROTOTYPE): on closer look they hold how-it-works detail
the wiki only summarizes + links, so folding would lose detail or bloat the wiki.
Gates: wiki-lint --strict (131) + markdown format clean.
