Sharpens the measurement layer to match the runtime spine landed in
07fefb9 / 7af7892 / 4e3ddee. Pure eval/benchmark/holdout work —
no runtime or planner code changed.
New isolation lanes
-------------------
* ``evals/compound_intent_decomposition/`` — single-purpose lane for
the new ``classify_compound_intent`` decomposer. Metrics:
``decomposition_accuracy``, ``atom_precision``, ``subject_accuracy``.
Public: ``decomposition=1.0`` on 4e3ddee.
* ``evals/walkthrough_chain/`` — single-purpose lane for the new
WALKTHROUGH sequential teaching-chain walk. Metrics:
``path_exact_rate``, ``anchor_rate``, ``min_hop_rate``, ``bounded_rate``.
Public: ``path_exact=1.0`` on 4e3ddee.
Without these, regressions in compound decomposition or the
walkthrough walk would show up as noise in ``multi_sentence_response``.
Each capability now has a single load-bearing metric on its own lane.
Cold-start lane sharpened
-------------------------
* ``evals/cold_start_grounding/public/v1/cases.jsonl`` extended with
expository, compound, and walkthrough cases (48 total cases across
19 categories including new ``expository_definition``,
``compound_definition_cause``, ``walkthrough_definition``).
* ``evals/cold_start_grounding/runner.py`` uses
``classify_compound_intent(...).primary`` for compound subject
scoring — previously misattributed subjects on multi-part prompts.
Holdouts for the long-span lanes
--------------------------------
Until now only the cognition lane had a holdout split. Adding
holdouts to the long-span lanes gives the planner work somewhere to
fail honestly when we widen:
* ``evals/cold_start_grounding/holdouts/v1/cases.jsonl`` (5 cases)
* ``evals/multi_sentence_response/holdouts/v1/cases.jsonl`` (5 cases)
* ``evals/conversational_thread_coherence/holdouts/v1/cases.jsonl`` (3 cases)
* ``evals/warmed_session_consistency/holdouts/v1/cases.jsonl`` (2 cases)
Discourse-planner-on bench sub-bench
------------------------------------
* ``benchmarks/articulation.py`` adds a planner-on sub-bench that
reports ``articulate_sentence_rate`` alongside the existing
throughput metrics. Baselines articulation under load before any
follow-up touches ``compute_trace_hash``.
Test coverage
-------------
* ``tests/test_compound_walkthrough_eval_lanes.py`` — new file pinning
the two new lane runners.
* ``tests/test_articulation_bench.py``, ``tests/test_cold_start_grounding_lane.py``,
``tests/test_intent_explain_paragraph.py``,
``tests/test_response_mode_classifier.py`` — updated for new cases
and assertions.
Validation
----------
* 152/152 active tests pass on the listed surfaces (2 skipped).
* smoke suite 67/67.
* cognition eval byte-identical: public 100/100/91.7/100.
* multi_sentence flag_on: articulate=1.0, disclosure=0.0, unarticulate=0.0
* compound_intent_decomp public: decomposition=1.0
* walkthrough_chain public: path_exact=1.0
* cold_start_grounding public (48 cases): intent=1.0, grounding=1.0, subject=1.0
Adds compound-intent decomposition for prompts that ask multiple
things in one turn ("What is X, and why does it matter?",
"Explain X, but how does it work?", "What is X, and what is Y?").
Three landings in one PR (rule says additive; the three pieces
are inseparable for the runtime hook to do anything useful):
1. generate/intent.py
* New ``CompoundIntent`` frozen dataclass — ordered tuple of
``DialogueIntent`` parts + raw_text + ``.primary`` back-compat
accessor + ``.is_compound()`` helper.
* New ``classify_compound_intent(prompt)`` sibling to
``classify_intent``. Pure, deterministic, byte-stable. Splits
on closed connector list (``,\s+(and|but|because|while)\s+``);
anaphoric tails ("why does it matter") get the prior part's
subject substituted ("why does truth matter") then are
classified independently.
* ``classify_intent`` return shape is untouched — every existing
caller still receives ``DialogueIntent``.
* No new ``IntentTag`` introduced. v1 semantic approximation:
"why does X matter" routes to ``CAUSE(X)``; "matter" means
causal/relevance support, not metaphysical importance.
2. generate/discourse_planner.py
* New ``plan_compound_discourse(compound, mode, bundles)`` —
concatenates per-part sub-plans in source order with a
``TRANSITION`` bridge (fact=None) between consecutive parts.
No cross-part re-sorting.
* New private kw-only ``_exclude_facts`` parameter on
``plan_discourse`` so subsequent sub-plans can avoid emitting
the same facts the prior sub-plans already used (prevents
"Truth is X. Truth is X." duplicates on shared-subject
compounds). Public signature ``(intent, mode, bundle)`` is
unchanged.
3. chat/runtime.py
* Helper ``_maybe_apply_discourse_planner`` now consults the
compound classifier first. When the prompt is multi-part it
builds per-part bundles and calls ``plan_compound_discourse``;
otherwise it follows the previous single-intent path.
* Compound bypass: when upstream tagged the surface ``oov`` /
``none`` because the flat classifier saw a polluted subject
(e.g. ``"truth, and why does it matter"``), but the compound
decomposition reveals a pack-resident primary subject, the
planner engages on the decomposed parts. This narrowly widens
the gate exclusively for compound prompts with substrate.
* BRIEF mode upgrades to EXPLAIN for compound prompts —
single-anchor sub-plans on shared subjects would emit duplicate
anchor sentences in BRIEF.
* Return shape widened to ``tuple[str, str] | None`` —
``(rendered_surface, new_source_tag)``. ``new_source_tag`` is
``"teaching"`` when the plan uses any teaching fact, else
``"pack"`` — so downstream labels reflect actual provenance
even on the compound bypass. Both cold and warm call sites
updated to apply both fields.
24 new tests pin: compound decomposition correctness, source-order
preservation across sub-plans, anaphoric-followup rewriting,
deterministic byte-stable plans, no new IntentTag introduced,
fact-dedup across sub-plans, compound-bypass engagement, and
source-tag correction on planner-engaged surfaces.
Lane re-measurement after 3 compound cases added to cases.jsonl
(24 total cases):
flag off: articulate=0.0833, disclosure=0.1667, unarticulate=0.7500
flag on : articulate=0.9167, disclosure=0.0000, unarticulate=0.0833
Note: disclosure flag-on dropped to 0.0 because the source-tag
correction now correctly labels compound-bypass surfaces as
``pack/teaching`` instead of letting the upstream ``oov`` label
inflate disclosure. The two remaining unarticulate cases flag-on
are the walkthrough prompts targeted by the next landing.
Critical gates all green:
* flag off cognition byte-identical: public 100/100/91.7/100
* smoke suite 67/67
* 32/32 planner tests pass (helper + render + compound)
* 18/18 compound classifier tests pass
Tightens the multi_sentence_response lane predicates so OOV
invitations and refusal disclosures can no longer be counted as
articulate capability. Three new metrics partition the case space:
articulate_sentence_rate - >=2 sentences AND grounded in
{pack, teaching}. Real capability.
disclosure_sentence_rate - >=2 sentences AND grounded in
{oov, refusal, none}. Structural
multi-sentence from disclosure templates.
unarticulate_rate - <2 sentences regardless of source.
The three sum to 1.0 (modulo rounding) by construction. The
doctrine-correct headline is now ``articulate_sentence_rate``;
``multi_sentence_rate`` is kept as a continuity metric only.
2 new tests pin: (a) the three-way partition is total and disjoint
(articulate + disclosure + unarticulate == 1.0); (b) OOV/refusal
disclosure surfaces contribute to disclosure_sentence_rate but
never to articulate_sentence_rate.
Live A/B on 21 cases under the new partition:
flag off: articulate=0.0952, disclosure=0.0476, unarticulate=0.8571
flag on : articulate=0.8571, disclosure=0.0476, unarticulate=0.0952
Planner lift is +76pp on articulate. Disclosure stays flat across
the flag (the planner gate correctly leaves disclosure surfaces
alone). The remaining 9.5pp unarticulate flag-on is the genuine
miss list (walkthrough + compound prompts) that the next two
landings will target.
contract.md updated to make articulate_sentence_rate the headline
and to document the partition explicitly.
cognition eval byte-identical: public 100/100/91.7/100.
smoke suite 67/67.
Option 1 of the lane-isolation work after the 8d1aeec predicate
refinement. Adds optional ``priming_prompts: [str, ...]`` to each
case in ``multi_sentence_response``. The runner runs priming prompts
on the same ``ChatRuntime`` instance before the scored prompt and
discards their responses; only the scored prompt is measured.
This isolates code paths (notably the discourse planner hook) that
engage only on the warm pack/teaching path from cold-start one-shot
paths. Cold-start measurement is preserved: cases without
``priming_prompts`` (or with an empty list) keep the old behavior.
New metric ``primed_multi_sentence_rate`` reports only on primed
cases. ``primed`` is also exposed per-case in case_details.
Six primed cases added to ``public/v1/cases.jsonl`` (Explain truth /
Tell about truth / Explain knowledge / Tell about light / Tell about
parent / Write a short paragraph about truth). Each is the cold-
start variant of an existing case plus a single "What is X?"
priming prompt.
3 new tests:
* Priming prompts run in order on the same runtime before the
scored prompt; primed=True on the result.
* Default cold-start behavior: no priming key OR empty list ⇒
primed=False; aggregate untouched.
* ``primed_multi_sentence_rate`` separates from aggregate so
cold cases never inflate/depress the warm-path metric.
A/B measurement on the live runtime (21 cases):
flag off: multi=0.1429, primed_multi=0.0000, primed_cases=6
flag on : multi=0.2857, primed_multi=0.5000, primed_cases=6
Lift is real and exclusively on the substrate the planner can
actually serve (teaching-grounded narrative). The three primed
"Explain X" and "Write a short paragraph about X" cases stay
vault-grounded (Explain / Write are not DEFINITION / NARRATIVE
intents and so don't fire pack-grounded warm), so they don't lift.
That gap is what option 2 will close.
contract.md updated to document priming and the new metric.
Shay