Design a proposal writing session that closes the gap from notes to draft

You have notes, a client and a deadline, and somehow no draft. This designs a session to close that gap: a warm-up that loads the client's actual problem into your head before you write a word, a writing block that builds the proposal, and a close that leaves a draft you can edit. Give it the proposal, the audience, your materials and the deadline, and it sets the work up.

I need to design a deep work session for writing a client or business proposal.

Proposal I am writing: {PROPOSAL_DESCRIPTION}
Client or audience: {CLIENT_AUDIENCE}
Session length available: {SESSION_LENGTH}
Materials I have to work from: {AVAILABLE_MATERIALS}
Submission deadline: {DEADLINE}

Design the session architecture:
- A warm-up that loads the client's problem into my head before writing a single word
- A writing sequence: executive summary last, not first; design the order for drafting
- How to handle sections where I lack information mid-session (placeholder strategy)
- Where to place breaks so persuasive argumentation stays coherent
- A rule that prevents over-engineering the structure at the expense of actually writing
- A shutdown ritual: what draft state I should leave the document in, and what to do next session

Make it specific to this proposal and deadline pressure.