I2672 — The offers and the selection are one read, projected to CLI, MCP, HTTP and OpenAPI

✕BLOCKED wave 1 · p1 · implementation profile · runs alone

Part of development-runtime — The runtime has a development surface.

Objective

Declare the read once with capability! so that every surface answers the same offers, the same choice and the same reason.

Why

The owner, 2026-10-13, with full clearance: set up MinIO, an sccache server and every mesh node, verified and validated. The cluster compiles the same Rust on every machine from a cold cache; two declared offload hosts were under their disk minimum that day. See ADR 0157.

Current state

Measured on master b29cf4e487 on 2026-10-13: mesh.status, mesh.nodes and mesh.peers exist; none of them answers what a node offers.

Desired state

mesh.build_cache answers offers, selection, rationale and the fallback taken; generated projections are current; no surface keeps a list of its own.

Scope

• apps/majordomus-cli/src/capability/builtin/mesh.rs
• docs/generated/

Out of scope

• The screen: I2675

Dependencies

• I2670○READY A build-cache offer is a typed model and its selection is a pure, explained function

What waits on this

• I2673✕BLOCKED The sccache client configuration is derived from the selected offer, local disk first
• I2675✕BLOCKED Build-cache health, headroom and hit statistics are visible where the mesh is
• I2677✕BLOCKED The build cache is documented, governed by a rule and described on the site and the Pages

Acceptance criteria

• The CLI, MCP tool and HTTP route answer identical content
• The OpenAPI document names the type and no secret field
• majordomus generate --check is clean

Validation

• bin/majordomus plan validate
• majordomus generate --check

Evidence required

• build_cache_read_projections

Evidence

None recorded. Every token above needs a command or an artifact behind it before this issue can be completed; narrative is refused.

Timeline

started

—

verified

—

completed

—

Those three fields, the evidence above and the state of the dependencies are all the status is made of. There is no status field to disagree with them.

Canonical record: .ai/repo/project/issues/I2672.yaml. Read it back with majordomus plan show I2672.