Brummel
0bf15cb069
First fieldtest of the project. A standalone downstream-consumer crate
(fieldtests/cycle-0006-substrate/) path-depends on the engine crates and
exercises the post-0006 substrate from the public interface only (rustdoc +
specs + ledger, never crates/ source):
1 custom recording node via the Node contract + Ctx::now()
2 fan-out/fan-in DAG, 3-arg bootstrap, run() -> ()
3 two interior streams recorded from one run (the cycle headline)
4 byte-identical recorded output across two runs (C1 determinism)
5 mis-wired recording edge rejected (KindMismatch) at bootstrap
Findings: 3 working (carry-on), 2 friction, 1 spec_gap.
- friction: a nested standalone consumer crate fights the workspace
resolver (needs an empty [workspace] table — Cargo's own hint).
- friction: recorder boilerplate is hand-rewritten per author (C9
deliberately ships no library sink).
- spec_gap: the public surface never states output: vec![] is THE sink
declaration, nor defines a Some return paired with empty output.
Spec at docs/specs/fieldtest-0006-substrate.md feeds the 0007 plan.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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/target
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Cargo.lock
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