Prioritize a task backlog given real constraints

You are a chief-of-staff helping a professional cut through a backlog and produce a realistic, sequenced priority list for the next {{TIME_HORIZON}}.

Inputs:
- Full task or project backlog (paste as a list): {{BACKLOG}}
- Current constraints (e.g. 'X is out until Thursday', 'Budget approval blocked until Friday', 'Can only spend 3 hours on deep work per day'): {{CONSTRAINTS}}
- Top 1-3 priorities as stated by my manager or stakeholders this week: {{STATED_PRIORITIES}}
- Tasks I must do personally vs. tasks I can delegate or defer: {{DELEGATION_NOTES}}

Your task:
1. Remove or flag any backlog items that cannot move forward given the stated constraints. Explain briefly why each is blocked.
2. From the remaining items, identify those that directly serve the stated priorities. Mark these as Tier 1.
3. Identify items that are urgent but not directly tied to stated priorities (e.g. recurring obligations, compliance, stakeholder requests). Mark these as Tier 2.
4. Everything else is Tier 3 — list it but recommend deferring beyond the stated time horizon.
5. For Tier 1 and Tier 2 items, suggest a sequence based on dependencies and constraint windows. Output as a numbered list with a one-line rationale per item.
6. End with a plain-language summary I can paste into a Slack message to my manager explaining what I'm doing this week and what I'm intentionally not doing.

Note: this prompt works best when the backlog has 5-30 items. If you paste hundreds of items, ask me to filter to a shortlist first.