feat(evals): cold_start_grounding lane — 44-prompt routing probe

Commits the 2026-05-19 probe as a durable, replayable eval lane.
This is *step 1* of the gloss-feature rollout sequence agreed
upstream: establish a stable measurement substrate before any
further intent/grounding changes, so the 52%→0% lift (and any
future regression) is reproducible and CI-pinned.

The lane is deliberately named ``cold_start_grounding`` rather than
``fluency``:
  - It measures **routing** (intent → grounding source), not
    sentence quality, morphology, or surface diversity.
  - The cold-start qualifier reflects the fresh-``ChatRuntime()``-
    per-case design.  Re-using a runtime across cases would
    contaminate the vault from earlier turns and was the exact bug
    observed during the probe before the per-case-runtime fix.

Files:

  evals/cold_start_grounding/contract.md
    Lane contract: what is measured, scoring rubric, pass thresholds
    (intent ≥ 0.95 / grounding ≥ 0.95 / subject ≥ 0.90), and the
    rationale for the deliberate non-fallback on CAUSE/VERIFICATION
    without teaching chains.
  evals/cold_start_grounding/public/v1/cases.jsonl
    44 cases across 16 categories.  Each case carries id, prompt,
    category, expected_intent, expected_grounding_source, and an
    optional expected_subject.  Categories cover every intent
    pattern fixed in b52e04a (Define, What-does-X-mean, infinitive,
    How-does-X-work, What-causes-X) plus OOV controls and CAUSE
    cases with/without teaching chains.
  evals/cold_start_grounding/dev/cases.jsonl
    5 representative cases for fast local iteration.
  evals/cold_start_grounding/runner.py
    Framework-compliant ``run_lane(cases, config=None) -> LaneReport``.
    Constructs a fresh ChatRuntime() inside ``_run_case`` (cold-start
    invariant).  Emits intent_accuracy, grounding_accuracy,
    subject_accuracy, full grounding distributions, and a per-
    category breakdown for regression attribution.
  tests/test_cold_start_grounding_lane.py
    16 contract tests covering: case-set integrity, valid enum
    values, unique ids, lane discovery, pass thresholds, expected-
    vs-actual distribution match (drift detection), the architectural
    invariants on oov_control and cause_no_teaching_chain cases, the
    cold-start invariant (static check that the runner constructs
    ChatRuntime() inside the per-case helper, not at module scope),
    and result JSON-serialization round-trip.

Baseline metrics (this commit, all v1 public cases):
  intent_accuracy:    1.0000  (44/44)
  grounding_accuracy: 1.0000  (44/44)
  subject_accuracy:   1.0000  (44/44)

  grounding distribution (actual == expected exactly):
    pack:      37
    oov:        4
    teaching:   1
    none:       2  (deliberate — CAUSE without teaching chain)

Why "none" cases are *expected* to ground as none:
  CAUSE / VERIFICATION on a pack-resident lemma WITHOUT an active
  teaching chain stays grounding_source='none' on purpose.  Falling
  through to pack_grounded_surface here would mask the discovery-
  candidate signal the teaching pipeline uses to identify chains
  worth authoring.  The contract test in
  TestArchitecturalInvariants::test_cause_no_chain_cases_route_to_none
  pins this doctrine.

Verification: 16/16 lane tests green; full lane run via
``core eval cold_start_grounding`` reports 100% on every metric.

Subsequent steps in the agreed sequence (NOT in this commit):
  2. Hygiene: runtime API wrappers (achat/arespond/respond) + the
     stale CAUSE/VERIFICATION docstring in
     tests/test_intent_classification_extensions.py.
  3. Harden gloss resolver in feat/pack-glosses-wip
     (lexicon-residency check, dual checksum, cache clearing,
     malformed-JSONL skip tests).
  4. Wire gloss-backed pack_grounded_surface().
  5. Author starter glosses with checksum discipline.
This commit is contained in:
Shay 2026-05-19 06:33:42 -07:00
parent b52e04a72f
commit a084f1db21
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# Cold-Start Grounding Eval Lane — Contract
**Lane:** `cold_start_grounding`
**Version:** v1
**Created:** 2026-05-19
## What this lane measures
Cold-start routing of conversational prompts to the correct grounding
source. Each case is fed through a **fresh** `ChatRuntime()` (no
vault accumulation, no prior turn) and the runtime's
`ChatResponse.grounding_source` is compared against the case's
`expected_grounding_source`.
This is a *routing* probe, not a fluency probe. It does not score
sentence quality, morphology, or surface diversity. It scores:
> *"For a realistic conversational prompt about a pack-resident lemma,
> does the runtime correctly route to a pack/teaching surface — and
> for a genuinely OOV lemma or an honest knowledge gap, does it route
> to OOV/none?"*
Two architectural invariants are pinned by this lane:
1. Pack-resident DEFINITION subjects always route to `pack`.
2. CAUSE / VERIFICATION subjects without an active teaching chain
stay `none` (deliberate non-fallback — preserves the
discovery-candidate signal the teaching pipeline uses).
## Scoring rubric
Each case produces three binary signals:
| Signal | Definition |
|---|---|
| `intent_match` | `actual_intent.tag.value == expected_intent` |
| `grounding_match` | `actual_grounding_source == expected_grounding_source` |
| `subject_match` | `actual_intent.subject == expected_subject` (optional; only checked when case carries `expected_subject`) |
Lane-level metrics:
| Metric | Definition | v1 pass threshold |
|---|---|---|
| `grounding_accuracy` | Fraction of cases with correct grounding source | >= 0.95 |
| `intent_accuracy` | Fraction of cases with correct intent tag | >= 0.95 |
| `subject_accuracy` | Fraction of cases with correct extracted subject (subset that asserts subject) | >= 0.90 |
## Pass criteria
All three thresholds satisfied on the public v1 split.
## Cold-start invariant
The runner constructs a **new** `ChatRuntime()` for every case. This
is deliberate: the lane measures cold-start routing, not multi-turn
accumulation behaviour. Re-using a runtime across cases would
contaminate vault content from earlier prompts (this is exactly the
bug observed during the 2026-05-19 probe — when the same runtime
processed multiple prompts the vault grounding source overrode the
pack source on later turns, producing garbled surfaces).
## Why this lane exists
The 2026-05-19 cumulative live probe surfaced that ~52% of realistic
conversational DEFINITION prompts on pack-resident lemmas were
returning `grounding_source="none"`. The bottleneck was intent
classification + subject extraction, not lexicon coverage. Five
specific patterns (`Define X`, `What does X mean?`, `What is to V?`,
`How does X work?`, `What causes X?`) had no rule or routed to an
intent the runtime dispatcher couldn't handle.
This lane commits that probe set as a durable, replayable artifact so
the lift is reproducible and any future regression in intent routing
fails the lane immediately.
## Case schema
```jsonl
{
"id": "definition_doubt_001",
"prompt": "What is doubt?",
"category": "definition_meta_pack",
"expected_intent": "definition",
"expected_grounding_source": "pack",
"expected_subject": "doubt"
}
```
`expected_grounding_source` is one of: `pack`, `teaching`, `oov`,
`none`, `vault`, `partial`.
`expected_subject` is optional; when present it pins the
extracted-subject invariant.
`category` is freeform and used to group cases in reports.

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{"id":"dev_define_moment","prompt":"Define moment.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"moment"}
{"id":"dev_what_does_soon_mean","prompt":"What does soon mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"soon"}
{"id":"dev_what_is_to_create","prompt":"What is to create?","category":"definition_infinitive","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"create"}
{"id":"dev_what_is_quasar","prompt":"What is quasar?","category":"oov_control","expected_intent":"definition","expected_grounding_source":"oov","expected_subject":"quasar"}
{"id":"dev_how_does_memory_work","prompt":"How does memory work?","category":"cause_no_teaching_chain","expected_intent":"cause","expected_grounding_source":"none","expected_subject":"memory"}

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{"id":"def_truth_001","prompt":"What is truth?","category":"definition_cognition","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"truth"}
{"id":"def_knowledge_002","prompt":"Define knowledge.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"knowledge"}
{"id":"def_memory_003","prompt":"What is memory?","category":"definition_cognition","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"memory"}
{"id":"def_fact_004","prompt":"What is a fact?","category":"definition_meta","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"fact"}
{"id":"def_belief_005","prompt":"What is belief?","category":"definition_morphology_gap","expected_intent":"definition","expected_grounding_source":"oov","expected_subject":"belief"}
{"id":"def_doubt_006","prompt":"What is doubt?","category":"definition_meta","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"doubt"}
{"id":"def_say_007","prompt":"What does say mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"say"}
{"id":"def_self_008","prompt":"What is the self?","category":"definition_meta_self_reference","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"self"}
{"id":"def_statement_009","prompt":"What is a statement?","category":"definition_meta","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"statement"}
{"id":"def_true_010","prompt":"What is true?","category":"definition_attitude_adjective","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"true"}
{"id":"def_important_011","prompt":"What does important mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"important"}
{"id":"def_good_012","prompt":"What is good?","category":"definition_attitude_adjective","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"good"}
{"id":"def_certain_013","prompt":"What does certain mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"certain"}
{"id":"def_evident_014","prompt":"Define evident.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"evident"}
{"id":"def_now_015","prompt":"What is now?","category":"definition_temporal","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"now"}
{"id":"def_future_016","prompt":"What is the future?","category":"definition_temporal","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"future"}
{"id":"def_soon_017","prompt":"What does soon mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"soon"}
{"id":"def_moment_018","prompt":"Define moment.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"moment"}
{"id":"def_before_019","prompt":"What does before mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"before"}
{"id":"def_make_020","prompt":"What does make mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"make"}
{"id":"def_to_create_021","prompt":"What is to create?","category":"definition_infinitive","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"create"}
{"id":"def_change_022","prompt":"What does change mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"change"}
{"id":"def_use_023","prompt":"What does use mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"use"}
{"id":"def_all_024","prompt":"What does all mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"all"}
{"id":"def_some_025","prompt":"Define some.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"some"}
{"id":"def_more_026","prompt":"What is more?","category":"definition_quantitative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"more"}
{"id":"def_enough_027","prompt":"What does enough mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"enough"}
{"id":"def_place_028","prompt":"What is a place?","category":"definition_spatial","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"place"}
{"id":"def_here_029","prompt":"What does here mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"here"}
{"id":"def_location_030","prompt":"Define location.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"location"}
{"id":"def_above_031","prompt":"What is above?","category":"definition_spatial","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"above"}
{"id":"def_effect_032","prompt":"What is an effect?","category":"definition_causation","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"effect"}
{"id":"def_consequence_033","prompt":"Define consequence.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"consequence"}
{"id":"def_trigger_034","prompt":"What does trigger mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"trigger"}
{"id":"def_outcome_035","prompt":"What is outcome?","category":"definition_causation","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"outcome"}
{"id":"def_always_036","prompt":"What is always?","category":"definition_polarity","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"always"}
{"id":"def_never_037","prompt":"Define never.","category":"definition_imperative","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"never"}
{"id":"def_maybe_038","prompt":"What does maybe mean?","category":"definition_what_does_x_mean","expected_intent":"definition","expected_grounding_source":"pack","expected_subject":"maybe"}
{"id":"oov_hypothesis_039","prompt":"What is a hypothesis?","category":"oov_control","expected_intent":"definition","expected_grounding_source":"oov","expected_subject":"hypothesis"}
{"id":"oov_quasar_040","prompt":"What is quasar?","category":"oov_control","expected_intent":"definition","expected_grounding_source":"oov","expected_subject":"quasar"}
{"id":"oov_javascript_041","prompt":"Define javascript.","category":"oov_control","expected_intent":"definition","expected_grounding_source":"oov","expected_subject":"javascript"}
{"id":"cause_why_truth_042","prompt":"Why is truth important?","category":"cause_with_teaching_chain","expected_intent":"cause","expected_grounding_source":"teaching","expected_subject":"truth"}
{"id":"cause_how_memory_043","prompt":"How does memory work?","category":"cause_no_teaching_chain","expected_intent":"cause","expected_grounding_source":"none","expected_subject":"memory"}
{"id":"cause_what_causes_doubt_044","prompt":"What causes doubt?","category":"cause_no_teaching_chain","expected_intent":"cause","expected_grounding_source":"none","expected_subject":"doubt"}

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"""Cold-start grounding eval lane runner.
Measures cold-start routing of conversational prompts to the correct
grounding source. Each case is fed through a **fresh** ``ChatRuntime()``
so the metric reflects routing, not multi-turn accumulation.
Framework contract: exposes ``run_lane(cases, **kwargs) -> LaneReport``
where ``LaneReport.metrics`` is a dict and ``LaneReport.case_details``
is a list of per-case dicts.
"""
from __future__ import annotations
from collections import Counter
from dataclasses import dataclass, field
from typing import Any
from chat.runtime import ChatRuntime
from generate.intent import classify_intent
@dataclass(frozen=True, slots=True)
class CaseResult:
case_id: str
category: str
prompt: str
expected_intent: str
actual_intent: str
intent_match: bool
expected_grounding_source: str
actual_grounding_source: str
grounding_match: bool
expected_subject: str | None
actual_subject: str
subject_match: bool | None
surface: str
@dataclass
class LaneReport:
metrics: dict[str, Any] = field(default_factory=dict)
case_details: list[dict[str, Any]] = field(default_factory=list)
def _run_case(case: dict[str, Any]) -> CaseResult:
"""Run a single case through a *fresh* ChatRuntime to measure
cold-start routing. Re-using a runtime across cases would
contaminate vault state from earlier turns."""
prompt = case["prompt"]
expected_intent = case["expected_intent"]
expected_grounding = case["expected_grounding_source"]
expected_subject_raw = case.get("expected_subject")
expected_subject = (
expected_subject_raw.strip().lower()
if isinstance(expected_subject_raw, str)
else None
)
# Classify intent independently for the subject-match check —
# avoids round-tripping through the runtime when the prompt
# bypasses pack-grounding for an OOV/none case.
classified = classify_intent(prompt)
actual_subject = (classified.subject or "").strip().lower()
# Fresh runtime — cold-start invariant.
runtime = ChatRuntime()
response = runtime.chat(prompt)
actual_grounding = (response.grounding_source or "none").lower()
actual_intent_tag = classified.tag.value
intent_match = actual_intent_tag == expected_intent
grounding_match = actual_grounding == expected_grounding
subject_match: bool | None
if expected_subject is not None:
subject_match = actual_subject == expected_subject
else:
subject_match = None
return CaseResult(
case_id=case["id"],
category=case.get("category", "uncategorised"),
prompt=prompt,
expected_intent=expected_intent,
actual_intent=actual_intent_tag,
intent_match=intent_match,
expected_grounding_source=expected_grounding,
actual_grounding_source=actual_grounding,
grounding_match=grounding_match,
expected_subject=expected_subject,
actual_subject=actual_subject,
subject_match=subject_match,
surface=response.surface,
)
def run_lane(cases: list[dict[str, Any]], config: Any = None) -> LaneReport: # noqa: ARG001 — config param required by framework contract
"""Run the cold-start grounding lane over *cases*.
Returns a ``LaneReport`` with three rate metrics plus a per-category
breakdown so regressions can be attributed to a specific
intent-classification or grounding pattern.
"""
results: list[CaseResult] = [_run_case(c) for c in cases]
total = len(results)
if total == 0:
return LaneReport(metrics={}, case_details=[])
intent_correct = sum(1 for r in results if r.intent_match)
grounding_correct = sum(1 for r in results if r.grounding_match)
subject_total = sum(1 for r in results if r.subject_match is not None)
subject_correct = sum(
1 for r in results if r.subject_match is True
)
grounding_distribution = Counter(r.actual_grounding_source for r in results)
expected_distribution = Counter(r.expected_grounding_source for r in results)
per_category: dict[str, dict[str, int]] = {}
for r in results:
cat = per_category.setdefault(
r.category,
{"total": 0, "intent_correct": 0, "grounding_correct": 0},
)
cat["total"] += 1
if r.intent_match:
cat["intent_correct"] += 1
if r.grounding_match:
cat["grounding_correct"] += 1
metrics: dict[str, Any] = {
"cases": total,
"intent_accuracy": round(intent_correct / total, 4),
"grounding_accuracy": round(grounding_correct / total, 4),
"subject_accuracy": (
round(subject_correct / subject_total, 4) if subject_total else 1.0
),
"subject_assertions": subject_total,
"grounding_distribution_actual": dict(grounding_distribution),
"grounding_distribution_expected": dict(expected_distribution),
"per_category": per_category,
}
case_details = [
{
"case_id": r.case_id,
"category": r.category,
"prompt": r.prompt,
"expected_intent": r.expected_intent,
"actual_intent": r.actual_intent,
"intent_match": r.intent_match,
"expected_grounding_source": r.expected_grounding_source,
"actual_grounding_source": r.actual_grounding_source,
"grounding_match": r.grounding_match,
"expected_subject": r.expected_subject,
"actual_subject": r.actual_subject,
"subject_match": r.subject_match,
"surface": r.surface,
}
for r in results
]
return LaneReport(metrics=metrics, case_details=case_details)
__all__ = ["run_lane", "LaneReport", "CaseResult"]

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"""Contract tests for the ``cold_start_grounding`` eval lane.
This lane commits the 44-prompt routing probe described in
``evals/cold_start_grounding/contract.md``. The probe is the durable,
replayable artifact behind the 2026-05-19 lift from 52% "I don't know"
responses to 0% (out of 44 realistic conversational prompts).
These tests pin:
- Case-set integrity (count, required fields, valid enum values).
- Lane discovery (framework can find and load the lane).
- Pass thresholds (intent / grounding / subject all >= 0.95 / 0.95 / 0.90).
- The deliberate non-fallback for CAUSE / VERIFICATION without
teaching chains: those cases expect ``grounding_source='none'``.
- Cold-start invariant: a fresh ``ChatRuntime()`` is used per case.
"""
from __future__ import annotations
import json
from pathlib import Path
from evals.framework import (
discover_lanes,
get_lane,
load_cases,
load_lane_runner,
run_lane,
)
LANE_NAME = "cold_start_grounding"
_EVAL_ROOT = Path(__file__).resolve().parent.parent / "evals" / LANE_NAME
_PUBLIC_CASES = _EVAL_ROOT / "public" / "v1" / "cases.jsonl"
_DEV_CASES = _EVAL_ROOT / "dev" / "cases.jsonl"
_VALID_GROUNDING = frozenset({"pack", "teaching", "oov", "none", "vault", "partial"})
_VALID_INTENTS = frozenset({
"definition", "cause", "procedure", "comparison", "correction",
"recall", "verification", "transitive_query", "frame_transfer",
"narrative", "example", "unknown",
})
class TestCaseSetIntegrity:
def test_public_cases_file_exists(self) -> None:
assert _PUBLIC_CASES.exists()
def test_public_case_count(self) -> None:
cases = load_cases(_PUBLIC_CASES)
assert len(cases) == 44
def test_every_case_has_required_fields(self) -> None:
for case in load_cases(_PUBLIC_CASES):
for field in ("id", "prompt", "category",
"expected_intent", "expected_grounding_source"):
assert field in case, (case["id"], field)
assert isinstance(case[field], str) and case[field], (case["id"], field)
def test_every_grounding_source_is_valid(self) -> None:
for case in load_cases(_PUBLIC_CASES):
assert case["expected_grounding_source"] in _VALID_GROUNDING, case
def test_every_intent_is_valid(self) -> None:
for case in load_cases(_PUBLIC_CASES):
assert case["expected_intent"] in _VALID_INTENTS, case
def test_case_ids_unique(self) -> None:
ids = [c["id"] for c in load_cases(_PUBLIC_CASES)]
assert len(ids) == len(set(ids))
def test_dev_cases_subset_of_categories(self) -> None:
"""Dev split must use the same case schema as public."""
cases = load_cases(_DEV_CASES)
assert len(cases) >= 1
for case in cases:
assert case["expected_grounding_source"] in _VALID_GROUNDING
class TestLaneDiscovery:
def test_lane_is_discoverable(self) -> None:
names = {lane.name for lane in discover_lanes()}
assert LANE_NAME in names
def test_lane_has_v1_version(self) -> None:
lane = get_lane(LANE_NAME)
assert "v1" in lane.versions
def test_lane_runner_loads(self) -> None:
lane = get_lane(LANE_NAME)
runner = load_lane_runner(lane)
assert hasattr(runner, "run_lane")
class TestPassThresholds:
"""The lane must satisfy its contract thresholds on the public set.
Thresholds (from ``contract.md``):
- intent_accuracy >= 0.95
- grounding_accuracy >= 0.95
- subject_accuracy >= 0.90
"""
def test_public_v1_passes_thresholds(self) -> None:
lane = get_lane(LANE_NAME)
result = run_lane(lane, version="v1", split="public")
metrics = result.metrics
assert metrics["intent_accuracy"] >= 0.95, metrics
assert metrics["grounding_accuracy"] >= 0.95, metrics
assert metrics["subject_accuracy"] >= 0.90, metrics
def test_distributions_match_expected(self) -> None:
"""When pass thresholds are 100%, the actual grounding
distribution must match the expected distribution exactly.
Drift here means a regression in intent routing."""
lane = get_lane(LANE_NAME)
result = run_lane(lane, version="v1", split="public")
actual = result.metrics["grounding_distribution_actual"]
expected = result.metrics["grounding_distribution_expected"]
assert actual == expected, (
f"grounding distribution drifted: actual={actual} expected={expected}"
)
class TestArchitecturalInvariants:
"""Pins two doctrine invariants the case set encodes:
1. ``oov_control`` cases ground as ``oov`` (genuinely unknown).
2. ``cause_no_teaching_chain`` cases stay ``none`` (the
deliberate non-fallback that preserves the discovery-gap
signal).
"""
def test_oov_control_cases_route_to_oov(self) -> None:
for case in load_cases(_PUBLIC_CASES):
if case.get("category") == "oov_control":
assert case["expected_grounding_source"] == "oov", case
def test_cause_no_chain_cases_route_to_none(self) -> None:
for case in load_cases(_PUBLIC_CASES):
if case.get("category") == "cause_no_teaching_chain":
assert case["expected_grounding_source"] == "none", case
assert case["expected_intent"] == "cause", case
class TestColdStartInvariant:
"""The runner must construct a fresh ``ChatRuntime()`` per case.
Without this invariant the metric drifts: vault accumulation from
earlier turns can override the pack source on later turns and
produce garbled surfaces (this was the bug observed during the
2026-05-19 probe before the fresh-runtime-per-prompt fix).
"""
def test_runner_module_uses_fresh_runtime(self) -> None:
runner_src = (_EVAL_ROOT / "runner.py").read_text(encoding="utf-8")
# Cold-start invariant must appear as code, not just a docstring.
# The runner constructs ChatRuntime() inside _run_case.
assert "ChatRuntime()" in runner_src
# And the construction must be inside the per-case helper,
# not module-scope (which would share runtime across cases).
# We assert the absence of a module-level instance binding.
for line in runner_src.splitlines():
stripped = line.lstrip()
if stripped.startswith(("_RUNTIME ", "_runtime ", "RUNTIME ")):
if "ChatRuntime(" in stripped:
raise AssertionError(
"module-scope ChatRuntime instance breaks the "
"cold-start invariant"
)
class TestResultSerialization:
"""The lane report must be JSON-serializable end-to-end."""
def test_metrics_round_trip(self) -> None:
lane = get_lane(LANE_NAME)
result = run_lane(lane, version="v1", split="public")
payload = json.dumps(result.as_dict(), sort_keys=True)
reloaded = json.loads(payload)
assert reloaded["metrics"]["cases"] == 44