A3, Tier 1 Wedge

AI Feature Spec

The spec your engineering team can ship from. Architecture, model choice, eval criteria, fail-mode analysis, all named.

$4,500 fixed, 1-2 weeks

Who this is for

Founders and product teams with a clear AI feature idea but uncertainty about the architecture, model choice, or how to know it's working. The build itself is straightforward once the spec is right. This package gets the spec right before anyone writes code.

What you get

User-facing flow walkthrough

Sequence diagram or comparable, in your tool of choice. What the user sees, what triggers the AI call, what comes back.

Model + vendor recommendation

Named choice with reasoning. Claude vs. GPT vs. Gemini vs. open-source. Why this one, why now, what triggers a re-evaluation.

Prompt architecture sketch

How prompts are structured, how context is assembled, how outputs are validated. Not the final prompt, but the shape.

Eval criteria

How your team knows the feature is working. Deterministic checks where possible, LLM-judged where not. Pass thresholds named.

Fail-mode analysis

What breaks, how it's detected, how the system degrades gracefully. The known unknowns.

Handoff doc for your engineers

A readable spec your team can build from without needing a follow-up call. Plus rough cost projections per request.

What you don't get

The build itself (that's the AI Build Sprint at $8,500 or AI Feature Build at $25k+)
Vendor procurement negotiation (we'll name the vendor; your team handles the contract)
A 40-slide vision deck (the spec is a tight document, not theater)

What we'll need from you

The feature concept (one paragraph is plenty)
Existing tech stack overview (what languages, frameworks, hosting)
One conversation with the engineering lead who will own the build
Anything you've already tried (failed prototypes, prior research)

Timeline

Day 1-2: Discovery call, stack walkthrough, feature concept locked
Day 3-5: Architecture exploration, model evaluation, eval criteria draft
Day 6-8: Spec writing, fail-mode analysis
Day 9-10: Engineering-team review, revisions, handoff session

What happens after

Your team builds. The spec is yours; we have no ongoing claim. If you'd rather not handle the build internally, the AI Build Sprint (B1, $8,500) is designed to execute exactly this kind of spec in 2 weeks.

Have a feature in mind?

A 30-minute discovery call confirms fit before the SOW.

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