feat(stream-d): kei-runtime — discover + validate + lint (invoke stub)
New crate _primitives/_rust/kei-runtime/ implementing §Runtime invocation
contract from locked substrate schema.
CLI (clap-derive):
- list-atoms [--root] [--crate] [--kind] → walk + print
- invoke <atom-id> --input <json|@file> → discover + validate input (stub exec)
- schema-lint [--root] [--crate] → 6-check validator
- pipe <dag.toml> → "not yet implemented" stub
Modules (≤ 200 LOC each, largest lint.rs @ 171):
- src/discover.rs — walk_atoms walks <root>/*/atoms/*.md, parses frontmatter
- src/validate.rs — JSONSchema draft-07 via jsonschema 0.17.1
- src/invoke.rs — MVP stub: discover → parse → validate_input → boundary ack
- src/lint.rs — 6 checks: required fields, kind enum, side_effects shape,
schema path existence + draft-07 declaration, wikilink resolution
- src/main.rs — clap CLI, exit 0|1|2 per §Runtime contract
Intentional stub boundary: invoke returns structured JSON ack (exit 0),
wire-up to concrete atom impls deferred to integration pass (needs
Stream B atoms landed first).
Registered kei-runtime in workspace members.
Tests: 2/2 integration smoke (lint_smoke, discover_smoke) green.
Stream D of substrate v1 parallel build.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
d68fddb59a