Plan your first 90 days as a new manager — build trust, learn before changing, and avoid the classic first-time-manager mistakes. Use when asked to help me as a new manager, I just became a manager, first-time manager advice, or my first 90 days managing a team. Produces a phased 90-day plan (listen and learn, then set direction, then adjust), how to run your first 1:1s, the mindset shift from doer to enabler, common traps to avoid (doing it all yourself, changing too fast, avoiding hard conversations), and early wins that build credibility.
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Use new-manager-first-90-days to create a phased 90-day plan for [management situation], [team and organizational context], and [main concern], including first-1:1 questions, early wins, and pitfalls to avoid.
Required inputs
[management situation]
[team and organizational context]
[main concern]
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SKILL.md
name: new-manager-first-90-daysdescription: "Plan your first 90 days as a new manager — build trust, learn before changing, and avoid the classic first-time-manager mistakes. Use when asked to help me as a new manager, I just became a manager, first-time manager advice, or my first 90 days managing a team. Produces a phased 90-day plan (listen and learn, then set direction, then adjust), how to run your first 1:1s, the mindset shift from doer to enabler, common traps to avoid (doing it all yourself, changing too fast, avoiding hard conversations), and early wins that build credibility."
New Manager: First 90 Days
The jump to managing is a role change, not a promotion for doing more of the same — and most first-time managers stumble by either changing everything on day one or staying an individual contributor with a title. This gives a phased first-90-days plan: earn trust and learn first, then set direction, then adjust — plus how to handle the 1:1s, delegation, and hard conversations that define the job.
What This Skill Produces
A phased 90-day plan — listen & learn (first weeks) → set direction (mid) → adjust & build (later), instead of changing everything at once
First 1:1s — how to run them to build trust and understand each person (their goals, working style, and what they need from you)
The mindset shift — moving from doer to enabler: your output is now the team's output
Trap avoidance — the classic first-time mistakes (doing the work yourself, changing too fast, avoiding difficult conversations, playing favorites)
Early wins — credibility-building moves that help the team without overstepping
A read on the situation — inheriting a team vs. building one, peers-now-reports, or a struggling team
Required Inputs
Ask for these if not provided:
The situation — inherited team, new team, promoted over former peers, or a turnaround
The team — size, and what you know about how it's doing
Your background — first-time manager or experienced, and your relationship to the team
The context — org expectations, any pressing issues
Your worry — what you're most unsure about
Framework: Learn, Then Lead
Listen before you change. Spend the early weeks understanding the team, the work, and the context before making changes — early sweeping changes without understanding destroy trust.
Invest in 1:1s. Use first 1:1s to learn each person's goals, strengths, working style, and needs — relationships are the foundation of everything else.
Make the mindset shift. Your job is now to enable the team, not to be the top individual contributor — resist doing the work yourself; delegate and develop.
Set direction once you understand. After learning, clarify priorities, expectations, and how the team will work — then adjust based on what you see.
Don't dodge the hard stuff. Address underperformance and tensions kindly but directly; avoiding difficult conversations early is a trap that compounds.
Bank early, appropriate wins. Small improvements and removing blockers build credibility without overstepping your still-forming understanding.
Output Format
First 90 days: [situation] · team [size] · [first-time?]
Situation read: [inherited/new/former-peers/turnaround → what it means].
Phase 1 (learn, ~weeks 1–4): listen · first 1:1s · understand work/context · no big changes yet.
First 1:1s — ask: [goals · working style · what they need from you · what's working/not].
Phase 2 (direction, ~weeks 5–8): clarify priorities/expectations · how the team works.
Phase 3 (adjust & build, ~weeks 9–12): refine · develop people · early wins.
Mindset shift: doer → enabler (your output = the team's).
Avoid: doing it all yourself · changing too fast · dodging hard conversations · favoritism.
Early wins: [remove a blocker · a small improvement].
Quality Checks
Plan is phased (learn → direct → adjust), not change-everything-now
Includes how to run trust-building first 1:1s
Names the doer→enabler mindset shift and delegation
Warns against the classic first-time-manager traps
Includes appropriate early wins
Tailored to the situation (inherited/peers/turnaround)
Anti-Patterns
Changing everything on day one before understanding.
Staying an IC with a manager title (won't delegate).
Skipping real 1:1s and relationship-building.
Avoiding underperformance/tension early.
Favoritism or trying to be everyone's friend over being fair.
Example Trigger Phrases
"I just became a manager for the first time — help me plan my first 90 days."
"How do I run my first 1:1s with my new team?"
"I got promoted over my former peers — how do I handle it?"
"I'm a new manager and keep doing all the work myself. Help."
"What are the biggest mistakes new managers make and how do I avoid them?"