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AM-4: gate scenario YAML, retarget on audited source, re-measure
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Adopts both remediations from CB-EV-0001 §4 (maintainer decision).

Option A — serde_yaml is now optional behind cb-game-runtime's
`scenarios` feature. The scenario module, the ScenarioGame impl and the
string parsers behind it are cfg-gated; cb-sim opts in explicitly. Both
configurations compile and lint clean under -D warnings.

A trap worth recording: `default-features = false` on a *member*
dependency is silently ignored when the workspace dependency does not
specify it. The first attempt gated nothing while looking correct — the
build succeeded and cargo tree still showed all six YAML crates. Fixed
by setting it on the workspace dependency. This is the positive-control
failure mode in miniature: success was not evidence the change applied.

Retarget — AM-4 now measures third-party source under audit, split by
build configuration, replacing a crate count that was unreachable
without undoing K5/K7 and that does not compare across ecosystems.

Re-measured via the new `make dep-weight`, whose own positive control
refuses to report when any crate's source cannot be located:

  shipped runtime   23 crates   246,250 lines   target <=250,000  met
  dev toolchain     29 crates   317,021 lines   target <=350,000  met
  own source                      3,408 lines

Scenario tooling costs 70,771 lines a shipped game never compiles —
the split the single number was hiding.

Targets are set at current measurement plus headroom, so they bind on
future growth rather than retroactively passing what had failed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
tegwick 2026-07-31 03:35:41 +02:00
parent 8e11fc412e
commit 4be6e020ea
12 changed files with 271 additions and 43 deletions
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Cargo.toml
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@ -16,8 +16,8 @@ license-file = "LICENSE"
[workspace.dependencies]
cb-kernel = { path = "crates/cb-kernel" }
cb-events = { path = "crates/cb-events" }
cb-game-runtime = { path = "crates/cb-game-runtime" }
games-ground = { path = "games/ground" }
cb-game-runtime = { path = "crates/cb-game-runtime", default-features = false }
games-ground = { path = "games/ground", default-features = false }
serde = { version = "1", features = ["derive"] }
serde_json = "1"
serde_yaml = "0.9"