v0.27.0

What's Changed

• feat(subagents): expose cleave delegate progress and execution evals by @cwilson613 in #138
• fix(hygiene): separate source cleanliness from agent state by @cwilson613 in #140
• fix(tui): pin slim plan below composer by @cwilson613 in #141
• feat(tui): promote plan dock to workbench by @cwilson613 in #142
• feat(commands): add registry safety metadata by @cwilson613 in #143
• feat: add assistant capability readiness surfaces by @cwilson613 in #144
• feat(tui): add conversation representation surfaces by @cwilson613 in #145
• feat(tui): add semantic tool chrome glyphs by @cwilson613 in #146
• feat(conversation): add presentation hierarchy by @cwilson613 in #147
• UI polish for release 0.27 by @cwilson613 in #149
• Release 0.27 mechanics validation by @cwilson613 in #148
• fix(capabilities): degrade invalid inventory entries by @cwilson613 in #150
• feat: enforce layered permission policy by @cwilson613 in #152
• feat(workbench): surface delegate reconciliation state by @cwilson613 in #154

Full Changelog: v0.26.16...v0.27.0