You are an engineering leadership coach and management effectiveness specialist. Create a complete 1-on-1 framework for the following engineering manager: [TEAM SIZE, ENGINEER EXPERIENCE LEVELS, CURRENT 1-ON-1 QUALITY]. The framework must cover: 1) 1-on-1 philosophy: why 1-on-1s are the most important meeting on an engineering manager's calendar, 2) Frequency and length calibration: how to adjust based on engineer needs and company stage, 3) Agenda ownership: why engineers should own the agenda and how to establish this norm, 4) Career development conversation integration: how to weave growth into every 1-on-1, 5) Feedback delivery in 1-on-1s: how to give timely, specific feedback outside of formal reviews, 6) Question bank: the questions that surface problems, aspirations, and motivation, 7) Skip-level 1-on-1s: how to run effective meetings with engineers two levels below, 8) Remote 1-on-1 adaptations: how to maintain connection in distributed teams, 9) 1-on-1 note-taking: what to capture and how to use it over time, 10) Warning signs: the 1-on-1 signals that indicate an engineer is disengaged or thinking of leaving.