Best Practice: Using detailed PRDs with Agent OS?

[phpmacher]

Context

I'm planning to use Agent OS for a new project where I've already created a comprehensive PRD with:

• Detailed interfaces
• Specific library choices
• Implementation algorithms
• Concrete API usage patterns

The Challenge

When I run /create-spec with my detailed PRD as input, Agent OS correctly abstracts this into high-level requirements in technical-spec.md following its templates:

• spec.md: 1-2 sentence overview, numbered feature list
• technical-spec.md: High-level requirements (e.g., "data model with properties")

This abstraction makes sense for token efficiency and clean planning, but I want the implementation phase to have access to all my PRD details.

My Proposed Workflow

After analyzing the Agent OS instruction files, I noticed that:

• /create-tasks generates abstract TDD-structured tasks (1-5 major tasks with test/implementation/verify pattern)
• /execute-tasks → execute-task.md Step 2 reads technical-spec.md during implementation

So my proposed workflow would be:

# 1. Create abstract specs
/create-spec (with detailed PRD.md as input)

# 2. Generate abstract tasks
/create-tasks

# 3. Inject detailed PRD before execution
cp my-detailed-PRD.md .agent-os/specs/.../sub-specs/technical-spec.md

# 4. Execute with full details
/execute-tasks

Rationale:

• Tasks stay abstract and flexible (TDD pattern intact)
• Implementation phase gets all concrete details from technical-spec.md
• Best of both worlds: clean planning + detailed execution

Questions

1. Is this the recommended approach when working with pre-existing detailed PRDs?
2. Are there any downsides to replacing the abstracted technical-spec.md before /execute-tasks?
3. Is there a better way to inject detailed specifications into the Agent OS workflow?

I suspect this is a common scenario: sometimes you start with rough ideas (where Agent OS abstraction is perfect), but sometimes you already have a detailed PRD and want that precision during
implementation.

Any guidance from the community or maintainers would be greatly appreciated!

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Additional Context:

• I've used Agent OS several times before successfully
• This is the first time I'm trying to integrate an existing detailed PRD
• I analyzed .agent-os/instructions/core/execute-task.md Step 2 which confirms it reads technical-spec.md during execution