Phase 1 was mostly a phantom: correct doc 19 and the WBS

The protocol spec claimed the envelope and grant drifted across implementations.
Inspection showed the wire agrees — envelope required headers match, the two
optional ones are legitimately optional, and the grant wire (the contributions
file) is identical on both sides. The disagreement was in dead types, now removed.

So phase 1's 'make them agree' work is done by deletion and correction. What
remains is a conformance fixture as prevention — pinning the envelope and the
contributions file so a future change that breaks agreement fails a test — and a
full per-capability suite is deferred until a third language actually needs it.

Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

03-DESIGN/01-to-be/19-the-module-protocol.md

@@ -115,11 +115,13 @@ breaking change for everybody.
 At-least-once. **Deduplication is on `x-event-id`**, which only the emitter can produce — a
 consumer cannot tell a redelivery from a second event any other way.
 
-### Not yet true
+### What is true, checked (2026-09-16)
 
-`x-causation-id` and `x-schema` are specified above and **emitted by nothing**. The Go
-implementation writes four headers; the TypeScript one declares six. This is the drift ADR 0074
-exists about, and the first thing conformance will fail on.
+Go emits all five required headers; the SDK requires exactly those. `x-causation-id` and `x-schema`
+are **optional** — the SDK sets them when a handler has a causation or a schema, and reads them
+back; a bare event carrying neither is correct. So the envelope agrees across the two
+implementations. `x-schema` is available for versioning a body's shape and is set by whoever has a
+version to declare.
 
 ---
 
@@ -158,11 +160,14 @@ A provider ships the provisioner that creates instances of what it offers
 same provision, so a grant addressed to a node alone does not name a consumer, and withdrawing one
 would take another's away.
 
-### Not yet true, and it is the sharpest disagreement
+### Checked, and it agrees (2026-09-16)
 
-The two existing implementations do not agree on this shape. In TypeScript a grant's `consumer` is
-**the module**; in Go, `Consumer` is **the node** and the module is `From`. One word, two meanings,
-in two halves of one mesh. At least one is wrong and the specification above says which.
+This looked like the sharpest disagreement and was not one. The live wire is the contributions file
+— `as`, `secret`, `node`, `at`, `values` — and it is the same on both sides. The types that
+disagreed (`Grant`, `Interface` in the SDK's `contracts`) were dead: exported, imported by nothing,
+describing fields the wire does not carry. They have been removed. The lesson kept: a type beside
+the wire that has drifted from it is worse than none, which is why the wire is specified and
+implementations are checked against it rather than trusted to still match a hand-kept shape.
 
 ---
 

03-DESIGN/01-to-be/22-the-work-ahead.md

@@ -32,20 +32,21 @@ The installer's own regressions (stale carried builder, a diagnostic on the pars
 fixed and committed. Whether it reaches a full green run is answered by the final lab run below,
 after the phases that change its build path are in — not before.
 
-## Phase 1 — the protocol is one thing, and correct
+## Phase 1 — the protocol is one thing, and correct  *(mostly done: the drift was dead types)*
 
 **Why here.** The Go control plane and the TypeScript SDK disagree about what a grant carries
 (`consumer` is the module in one, the node in the other). That is exercised by the installer's own
 provisioning — the catalogue's database — so it belongs before more is built on it.
 
-- [ ] 1.1 extract the wire contracts to one specification the two implementations both conform to
-- [ ] 1.2 make Go and TypeScript agree — one meaning for `consumer`, the envelope's six headers
-      emitted by both
-- [ ] 1.3 an executable conformance suite, per capability, both existing SDKs made to pass it
-- [ ] 1.4 the `x-schema` header written, so a body's shape can version (ADR 0074)
+- [x] 1.1 the drift was not live — inspection showed the wire agrees (contributions file; envelope
+      required headers). The dead types that disagreed are removed, ADR 0074 and doc 19 corrected
+- [ ] 1.2 a conformance fixture for the two live cross-language contracts — the event envelope and
+      the contributions file — checked in both suites, as **prevention** rather than repair
+- [ ] 1.3 (deferred) a full per-capability suite when a third language is actually added; not
+      needed to keep two honest
 
-**Done when.** A fixture emitted by one implementation is read identically by the other, checked in
-both test suites.
+**Done when.** A fixture pins the envelope and the contributions file, and a change to either side
+that breaks agreement fails a test rather than a mesh.
 
 ## Phase 2 — the private package registry, and the SDK in it