Acceptance decks scripted: DSL catalog, swift run AcceptanceDecks, differential gate (#24)

[leogdion]

Part of #24 — the AFK half. The Keynote 15.3 open pass and the v0.1.0 tag stay with Leo.

What this adds

• AcceptanceDeckCatalog (internal target, not a product): the five acceptance decks — bisect_in, bisect_out, bisect_action, bisect_direction, build_acceptance — expressed in the public DSL, mirroring research/examples/*.json field-for-field. Per PLAN Step 6, Action goes through .action { MotionPath() } and direction through the typed .direction(.moveInNonDefault).

• swift run AcceptanceDecks [dir] (executable target): writes the five decks from the bundled template, self-checks each (every record decodes; both SIGTRAP invariants hold via UUIDMapVerifier), then prints the PLAN Step 6 human checklist. Default output: ./acceptance-decks/.

• AcceptanceDeckTests — three gates per deck (15 tests):

  1. the DSL lowering equals DeckSpec.load of the committed spec;
  2. authoring the lowered model into the stripped golden reproduces the golden archive graph (GoldenSurgeryStripper + ArchiveGraphComparer, same normalization as the 08 — Writer: builds match goldens + invariants (KeynoteKit) #20 differential);
  3. the full public write path emits a structurally valid deck.

  Verified non-vacuous: perturbing one catalog value (bisect_in duration 1→2) fails gates 1 and 2.

• .claude/PARALLEL-WORKTREES.md: current-position note updated for the post-05–11 — Container stack, navigation, writer, supply, and authoring API (#17, #18, #20, #22, #23) #32 state; phases 2–3 struck.

Verification

• Full suite green on the 6.4 toolchain (swift test): 93 tests incl. the 15 new ones.
• LINT_MODE=STRICT ./Scripts/lint.sh: 0 violations.
• swift run AcceptanceDecks <scratch>: five .key files written and self-checked (~100 KB each).

🤖 Generated with Claude Code

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[leogdion]

Pushed 181d2db: @SlideBuilder now annotates the SlideContent.body requirement itself (like SwiftUI's @ViewBuilder var body), so conformances get builder inference automatically — the explicit attribute on BuildAcceptanceContent.body is gone. Side effect: the primitives' unreachable Never bodies had to become real compositions (Slide/SlideGroup compose to themselves) because an inferred builder can't produce Never. Full suite + strict lint green.