Files
hq/03-DESIGN
jschoubben b637fe106f The module protocol, specified per capability
A floor every implementation needs and three capabilities independent of each
other, so an SDK can implement the floor and events and be a real thing rather
than an unfinished one.

Written as a specification, which means it says what is required rather than how
anything is arranged — and says plainly where it describes behaviour that is not
yet true. Three places it does:

x-causation-id and x-schema are specified and emitted by nothing; the Go side
writes four headers and the TypeScript side declares six. A module may serve
tools and may not call them, because a caller needs a reply queue its account may
not declare. And the two implementations disagree about what a grant carries — in
TypeScript consumer is the module, in Go it is the node and the module is From.
One word, two meanings, in two halves of one mesh.

Naming those in the specification rather than leaving them for conformance to
discover, because a specification that only described what already works would
have nothing to say about the things most likely to break.

Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx
2026-09-15 13:45:25 +02:00
..

03-DESIGN

The authoritative specification. Implementation is built against what is written here.

Two layers

Folder What it is
00-as-is/ The mesh that exists today. Shipped behaviour, described as it is — including behaviour nobody would choose again.
01-to-be/ The mesh being built toward. Every statement traceable to a record in 02-DECISIONS/.

They are never mixed. A statement about the future does not belong in an as-is document, and an as-is document is never edited to describe an intention.

When a to-be design ships, it does not move. Its as-is counterpart is written or updated, the to-be document's status becomes implemented, and both stand — one describing what runs, the other recording what was intended. Deleting the intention loses the reasoning, which is the expensive half.

Frontmatter

Every design document (not the READMEs) carries:

---
layer: as-is | to-be
status: designed | in-progress | implemented | abandoned
code: []                 # owning code repo(s), from 00-META/repos.md
updated: YYYY-MM-DD      # date of the last status change, not of text edits
decisions: []            # 02-DECISIONS/ records this document rests on
---

For an as-is document, status: implemented is the normal state — it describes something that runs — and code: names where that implementation lives.

Status changes when implementation state changes, never because design text was edited. An implemented claim must be defensible from the owning repository's main branch, not from intent. If it cannot be checked, it is in-progress.

Cross-cutting views are generated from this frontmatter by the hq-status skill and never written to disk.

What belongs here

Functional analysis, architectural description, and specification — prose and diagrams only, no code. A manifest field may be named; a manifest may not be pasted. A document enters the to-be layer only after the decision behind it is recorded in 02-DECISIONS/ and the research that produced it is closed.

Subfolders are encouraged where a layer grows enough to need them.