Records the deterministic, grounded, multi-clause articulation
benchmark that the discourse-planner work has stabilised. Mirrors
the format of teaching_loop_bench.md so the four sub-benches in
benchmarks/articulation.py have a load-bearing reference document.
Headline:
* 20 independent ChatRuntime instances × 4 prompts (EXPLAIN /
PARAGRAPH / COMPOUND / WALKTHROUGH) produce 4 unique surfaces —
byte-identical determinism on the articulation path with
RuntimeConfig(discourse_planner=True).
* Every visible token traces to a pack lemma, pack gloss, reviewed
teaching-chain entry, or fixed-template connective from the
closed five-entry _MOVE_CONNECTIVE table. No synthesis.
* discourse_planner sub-bench:
cases: 4
articulate_sentence_rate: 1.0
disclosure_sentence_rate: 0.0
multi_sentence_rate: 1.0
* Compound prompt ("What is truth, and why does it matter?") emits
6 distinct grounded sentences with cross-part fact dedup, no
anchor repetition.
* Walkthrough mode walks the teaching-chain edge graph up to 3 hops,
cycle-safe, final hop as CLOSURE; no chain ⇒ degrades to ANCHOR +
SUPPORT rather than fabricating steps.
Doc explains the partitioned predicate contract
(articulate + disclosure + unarticulate = 1.0, total and disjoint)
so future readers know why ``multi_sentence_rate`` alone is not the
headline.
Companion docs cross-linked: discourse_runtime_baseline_2026-05-19.md
(lane-level delta table), the two new isolation lanes
(compound_intent_decomposition, walkthrough_chain), and the
partitioned multi_sentence_response contract.
