deffo is a guided, PRD-first app builder. A grill-me chat turns your idea into a short product requirements doc, a connected task graph is derived from it, and agents execute the work against machine-checkable acceptance criteria — while live status flows straight back into the PRD.
No terminal views, no endless chat logs. You work on a document; the system does the rest and reports back into the same document.
A chat that interrogates your idea — what it is, who it's for, what done means — and drafts a shortform PRD you can actually read in five minutes.
The PRD unfolds into a connected graph of epics → nodes → atoms. Every task, setting, and dependency links back to the document it came from.
Autonomous agents pick up atoms that are ready — unmet dependencies self-block — and work in isolated git worktrees until every acceptance criterion passes.
Completion updates the PRD automatically. Edit the PRD and the work updates too — it's a two-way street, not a one-shot export.
Generation and verification are separate workers — no implementer grades its own work. Everything else follows from that one rule.
Atoms carry machine-checkable criteria. Agents loop until they pass — and “done” is set only by a passed verdict, never by a claim.
Verification is a first-class surface: diffs, test results, and evidence cards you can skim — not a raw scroll of agent output to excavate.
Ask me / edit with approval / fully autonomous — a property of each task, not a global mode you forget you set.
Every state change is an append-only event. The PRD, board, and status views are pure functions of the journal — replayable, auditable, never lost.
deffo stores secret names, domains, and policies. Credentials are injected at the transport layer through a proxy — the server never sees a value.
Scheduling, dependency blocking, status derivation, git commits — all plain code. LLMs are reserved for judgment: planning, implementing, reviewing.
deffo is early — but the guided build loop already runs end to end: chat → PRD → task graph → verified atoms.