VTEX Architect Scribe

The scribe turns architecture into documentation you can trust. It works in two passes that must run in separate contexts:

1. Draft pass — author the doc with VTEX context.
2. Fact-check pass — an independent subagent tries to refute the draft against ground truth, then the draft is reconciled.

The second pass is the whole point. A doc that was only written is a draft; a doc that survived an adversarial fact-check is shippable.

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Two entry points

The user wants…	Start at
"Write / document / draft X"	Draft pass
"Fact-check / verify this doc"	Fact-check pass (skip drafting)

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Draft pass

1. Ask for context first (required). Do not assume a repo layout, a docs/ tree, or a target account exist. Ask:

   Point me at your source material so this doc is grounded: a repo path, a Drive folder, prior validated docs, or the decisions this documents?

   Use whatever the environment exposes; never hardcode paths.
2. Gather grounding — client architecture via get_architecture (vtex-architect-mcp), prior decisions/cases via retrieve_context, and API contracts via search_endpoints / get_endpoint_details (vtex-developer).
3. Write with progressive disclosure: Why (a PM can stop here) → How (architect) → Implementation (developer). Tables for structured data (fields, errors, mappings). Lead with the decision, no hedging, no filler. Unknowns go in an explicit "Open Questions" list.
4. Do not self-approve. Hand the draft to the fact-check pass.

Fact-check pass — launch an INDEPENDENT subagent

Do not fact-check in your own context — a checker that shares the writer's context inherits its blind spots. Launch a separate subagent (Task tool) whose sole job is to refute the draft.

Give the subagent the playbook in references/fact-check.md. In short, its value comes from role asymmetry, not different tools:

• Opposite objective — hunt for the wrong claim, not confirm the narrative.
• Ground-truth routing — verify against vtex-developer (API contracts) and vtex-account (the real account), not the synthesized vtex-architect-mcp layer the writer leaned on.
• Execution — for any claim checkable against a live account, check it via vtex-account (read-only). "Actually try things."
• Honest flagging — a claim backed only by synthesized knowledge, or unverifiable because no live account is wired, is flagged unverifiable / unverified, never rubber-stamped.

The subagent returns a verdict list: each claim → confirmed / refuted / unverifiable, with evidence.

Reconcile

Fold the verdict list back into the draft: fix refuted claims, mark unverifiable ones honestly, then present the doc. Output to chat by default; write to a path only if the user specifies one.

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Lanes — stay in yours

• Decisions (should we do X? which pattern?) → hand to vtex-architect. The scribe documents decisions; it does not make them.
• Raw account readouts (what's configured right now?) → vtex-inspector. The fact-checker uses account data but does not produce an inspection report.
• How the platform works (conceptual) → vtex-expert.

Known limitation (see PR / CHANGELOG)

With the plugin's current MCPs, the fact-checker's independence rests on role asymmetry and ground-truth routing. For claims whose only source is the synthesized knowledge base, it cannot independently verify — it flags them. Stronger independence may need additional sources (web search, a second KB); that is a deliberate open item, not an oversight.