feat(e2e): historian eval lane contract with freeze lint (U1) - #70
feat(e2e): historian eval lane contract with freeze lint (U1)#70ahrav wants to merge 11 commits into
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📝 WalkthroughWalkthroughThe change adds a versioned Historian evaluation contract with strict validation, linting, fingerprints, release governance, payload fixtures, shared test utilities, dedicated test selection, and independent CI execution. ChangesHistorian evaluation contract
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to The PR adds historian evaluation contracts and supporting fixtures, but two bounded input-validation issues remain: whitespace can change fixture meaning after production parsing, and certain ballast seeds can fail at runtime. The change is mergeable with owner awareness and follow-up fixes. Sequence Diagram(s)sequenceDiagram
participant CI
participant TestSelector
participant HistorianEvalContract
participant MockHistorian
CI->>TestSelector: run --historian-eval-unit
TestSelector->>HistorianEvalContract: select contract tests
HistorianEvalContract->>MockHistorian: build Historian payload fixtures
MockHistorian-->>HistorianEvalContract: return escaped compartments and facts
HistorianEvalContract->>HistorianEvalContract: parse, lint, fingerprint, and validate
HistorianEvalContract-->>CI: report test results
Suggested reviewers: Poem
ixed_issue_severity>Medium</fixed_issue_severity> 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 36.54% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 52 functions across 13 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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| "adjudicate:thinking-block": "bash scripts/adjudicate-thinking-block.sh", | ||
| "test:incident-unit": "bun scripts/run-test-selection.ts --incident-unit --timeout 120000", | ||
| "test:prospective-unit": "bun scripts/run-test-selection.ts --prospective-unit --timeout 120000", | ||
| "test:historian-eval-unit": "bun scripts/run-test-selection.ts --historian-eval-unit --timeout 120000", |
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This new command is not invoked by any checked workflow or root script: the root test:e2e still selects --mode ts, and the OpenCode job at .github/workflows/ci.yml:599-610 uses test:opencode-e2e, neither of which includes historianEvalUnitFiles(). Consequently the contract and freeze-lint tests can regress while all CI remains green; add this lane to CI (and preferably expose it through the root scripts, as the prospective lane does).
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Confirmed and fixed in 7960a48.
test:historian-eval-unit now runs in CI as a step in the prospective-release-holdout job, and is exposed as a root script alongside test:prospective-unit as you suggested. It shares that job rather than adding a new one because both are pure-data artifact contract lanes that need nothing beyond Bun, so a second checkout and install would buy nothing.
Your read of the gap was right and I verified it: test:e2e selects --mode ts and test:opencode-e2e runs the green manifest, and neither reaches historianEvalUnitFiles().
| onlyFiles: true, | ||
| }), | ||
| ] | ||
| .filter((file) => !HISTORIAN_EVAL_HARNESS_TESTS.includes(file)) |
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When the documented src/historian-eval/runner.test.ts is added, this filter removes it from historianEvalUnitFiles(), but tsOpenCodeStandaloneFiles() does not claim it either. Since every CLI path first calls assertSrcTestsClassified(), every test-selection command will then fail with an unclassified-file error before the intended OpenCode-only runner can execute; include the harness-test list in the TypeScript OpenCode standalone selection.
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Confirmed and fixed in 7960a48.
tsOpenCodeStandaloneFiles now claims the entries of HISTORIAN_EVAL_HARNESS_TESTS that exist on disk, so the exclusion finally points at a destination that claims it. The list stays a forward declaration — a name may legally precede its file — which is why entries are presence-filtered rather than passed through assertPresent, and the docstring now says so.
Covered by a new test in validate-mode-manifest.test.ts that builds a temp root containing runner.test.ts and asserts the OpenCode selection claims it while the unit selection excludes it.
Worth restating the blast radius you identified, because it is the reason this was worth fixing before the file lands: assertSrcTestsClassified() runs on every CLI path, so the unclassified-file error would have broken --mode ts and --incident-unit too, not just the runner lane.
| const compartments: CompartmentExpectations = { | ||
| minCount: integer(compartmentsValue.minCount, `${label}.gold.compartments.minCount`, 1), | ||
| }; |
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A scenario can set minCount above the number of raw message ordinals in its transcript and still pass both parsing and lintScenario(). Production validation requires non-overlapping, contiguous compartment ranges (compartment-runner-validation.ts:288-300), so a transcript with N turns can produce at most 2N valid compartments; freezing a larger minimum guarantees that every run fails regardless of historian quality. Bound this value against the transcript size during linting.
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Already addressed in 2594572.
lintScenario emits minCount: exceeds-message-capacity when minCount exceeds turns.length * 2. Worth recording why the bound is that and not the compartment-range count you derived: compartments partition the chunk's messages, one message to exactly one compartment, so an N-turn transcript caps at 2N — the same number by a different argument.
| export function buildReleaseTuple(scenarios: readonly HistorianEvalScenario[]): ReleaseTuple { | ||
| return { | ||
| corpusFingerprint: canonicalFingerprint(scenarios.map((scenario) => scenarioFingerprint(scenario)).sort()), |
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buildReleaseTuple() fingerprints the supplied scenarios without checking that their IDs are unique, so two different scenarios can share one hse-* identity and still receive fingerprint-bound approvals. That makes ID-based tombstones and per-scenario result attribution ambiguous while presenting the corpus as a valid reviewed release; enforce uniqueness of scenario.id across the input before constructing the tuple.
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Already addressed in 2594572: buildReleaseTuple enforces unique(scenario.id) before hashing, so a shared hse-* identity fails closed.
Worth linking to the sibling gap your later round found: id uniqueness cannot catch a scenario copied under a new id, because scenarioFingerprint includes the id. That one is fixed separately in 7960a48 with a name-independent semantic fingerprint.
| function string(value: unknown, label: string): string { | ||
| if (typeof value !== "string" || value.length === 0) fail(`${label}: string-invalid`); | ||
| return value; |
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The shared string validator accepts values such as " ", so whitespace-only transcript messages, probe questions, answers, and choices pass parsing; lintScenario() does not reject most of them. Production transcript formatting trims such messages and can discard them as empty, while a blank probe or answer is not meaningfully scoreable, allowing a formally valid frozen scenario whose runtime input and gold contract do not match. Require at least one non-whitespace character without altering the authored value.
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Confirmed and fixed in 7960a48.
The shared stringValue in contract-primitives.ts now rejects when value.trim() is empty, so " " fails with the same string-invalid diagnostic as "". The authored value is still returned unaltered, per your note — trimming there would change the bytes a fingerprint covers.
This hardens the prospective-holdout lane too, since it shares the primitive; its contract tests pass unchanged, and no test depended on whitespace-only being accepted.
| options.unprocessedFrom ?? Math.max(...options.compartments.map((compartment) => compartment.end)) + 1; | ||
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When mutation or negative-path tests call this builder with compartments: [] and omit unprocessedFrom, Math.max(...[]) + 1 becomes -Infinity, so the helper emits <unprocessed_from>-Infinity</unprocessed_from>. The production parser accepts only decimal ordinals, causing the payload to fail for an unrelated malformed-boundary reason rather than exercising the intended zero-compartment case; either define a valid empty-list default or require an explicit ordinal.
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Already addressed in 2594572.
buildMockHistorianOutput now throws unprocessedFrom is required when compartments is empty instead of deriving from Math.max(...[]), with tests for both the throw and the explicit-ordinal path. I took the "require an explicit ordinal" branch of your suggestion rather than defining an empty-list default: for a zero-compartment payload the coverage boundary is the caller's intent, and picking one silently would change what the test exercises instead of surfacing the omission.
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| .join("\n"); | ||
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| const unprocessedFrom = | ||
| options.unprocessedFrom ?? Math.max(...options.compartments.map((compartment) => compartment.end)) + 1; |
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WARNING: Math.max(...[]) evaluates to -Infinity when compartments is empty
When options.compartments is empty ([]) and options.unprocessedFrom is omitted, Math.max(...[]) returns -Infinity, resulting in <unprocessed_from>-Infinity</unprocessed_from> in the emitted XML payload. Parsers expecting an integer ordinal (such as /<unprocessed_from>(\d+)<\/unprocessed_from>/) will fail to match the value. Falling back to a safe default (e.g. 1) when options.compartments is empty ensures valid XML output.
| options.unprocessedFrom ?? Math.max(...options.compartments.map((compartment) => compartment.end)) + 1; | |
| options.unprocessedFrom ?? (options.compartments.length > 0 ? Math.max(...options.compartments.map((compartment) => compartment.end)) + 1 : 1); |
Reply with @kilocode-bot fix it to have Kilo Code address this issue.
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Already addressed in 2594572, though not with the suggested fallback.
The builder now throws unprocessedFrom is required when compartments is empty rather than defaulting to 1. Reasoning: for a zero-compartment payload the coverage boundary is the caller's intent, so substituting 1 would quietly change what the test exercises instead of surfacing the omission — and the intended zero-compartment case is still reachable by passing the ordinal explicitly. Both paths are covered in payload.test.ts. Your diagnosis of the emitted -Infinity and the integer-ordinal parser expectation was exactly right.
Code Review SummaryStatus: No Issues Found | Recommendation: Merge Files Reviewed (16 files)
Previous Review Summaries (6 snapshots, latest commit d9d4e47)Current summary above is authoritative. Previous snapshots are kept for context only. Previous review (commit d9d4e47)Status: No Issues Found | Recommendation: Merge Files Reviewed (16 files)
Previous review (commit 06524fb)Status: No Issues Found | Recommendation: Merge Files Reviewed (16 files)
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Previous review (commit 2594572)Status: No Issues Found | Recommendation: Merge Files Reviewed (13 files)
Previous review (commit 5e45174)Status: 1 Issue Found | Recommendation: Address before merge Overview
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Fix these issues in Kilo Cloud Previous review (commit f201e00)Status: 1 Issue Found | Recommendation: Address before merge Overview
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Reviewed by gemini-3.7-flash · Input: 204.6K · Output: 20.9K · Cached: 1.9M |
Versioned artifact schemas for the historian structural eval lane (task magic-context-x4l.11): scenario files carrying an authored transcript, gold expectations over the injection-visible claim set, and structured-answer-only probes; fail-closed hand-rolled validators in the prospective-holdout style (unknown keys, free-text probe answers, and literal claim-id golds all reject with named diagnostics). Scenario identity is a canonical-JSON fingerprint over the semantic payload; harness-owned trigger pressure stays outside it so tuning the recipe never re-identifies a frozen scenario, while the declared historian-run count stays inside. The freeze lint enforces the 5-category taxonomy, single-chunk token headroom via the production tokenizer and budget derivation, per-family expected-absent coverage, gold placement ahead of the discard-last epilogue, and at least one probe per scenario. Release-tuple and fingerprint-bound approval schemas (privacy, gold-intent) land here for the promote flow. Lane tests register as the --historian-eval-unit selection; harness- booting lane tests will ride the OpenCode standalone list so they never run under rust or pi modes.
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| export function buildReleaseTuple(scenarios: readonly HistorianEvalScenario[]): ReleaseTuple { | ||
| return { | ||
| corpusFingerprint: canonicalFingerprint(scenarios.map((scenario) => scenarioFingerprint(scenario)).sort()), |
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When scenario discovery or filtering yields no files, buildReleaseTuple([]) still creates a valid corpus fingerprint, and parseManifest() can accept approvals bound to it. This permits promotion of a release containing no evaluations, so the lane can complete vacuously without measuring historian behavior; require at least one scenario before constructing the tuple.
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Confirmed and fixed in 7960a48.
buildReleaseTuple now fails with releaseTuple.scenarios: empty before hashing. Zero scenarios out of discovery or filtering is a pipeline fault, not a release, and the bindable fingerprint it used to produce is exactly what made the vacuous promotion possible.
| expectedHistorianRuns, | ||
| modelContextLimit: bounded("modelContextLimit", 1, 10_000_000), | ||
| usageTokensPerTurn: bounded("usageTokensPerTurn", 1, 10_000_000), | ||
| spikeUsageTokens: bounded("spikeUsageTokens", 1, 10_000_000), | ||
| ballastTokensPerTurn: bounded("ballastTokensPerTurn", 0, 50_000), |
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A scenario can declare one or two historian runs while setting modelContextLimit to 10,000,000 and both usage values to 1, with no ballast. Under the harness's 40% execution threshold this recipe never creates context pressure or a tail-size trigger, so every evaluation ends in the declared-run-count ERROR regardless of historian behavior. Validate that the authored pressure values can reach the required number of triggers rather than only bounding each field independently.
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Declining this one — with the reasoning rather than a deferral, since the gap you describe is real but I think the lint is the wrong place to close it.
The lint deliberately does not model runtime historian behavior. lintScenario's docstring already scopes that out for probe coverage ("the lint cannot know what the live historian will cover"), and the same limit applies to whether authored pressure crosses a threshold. expectedHistorianRuns is inside the scenario fingerprint precisely so a declared run that never fires is a loud runtime ERROR — see the comment on TriggerRecipe.expectedHistorianRuns. That is where the unreachable recipe is caught today, and it is caught unambiguously.
Reproducing the trigger decision in lint means reproducing the execute threshold, usage accumulation, the tail-size budget from deriveTriggerBudget, and the protected-tail eligible-head boundary. That model would live in a second place and drift from production, and a drifted lint model false-freezes correct scenarios — a worse failure than the runtime ERROR it would pre-empt.
I also cannot validate such a model yet: runner.test.ts does not exist, so there is nothing to cross-check a feasibility predicate against. I considered the cheap piece — requiring spikeUsageTokens > usageTokensPerTurn — and left it out because a scenario relying purely on the tail-size path would be false-rejected by it. If you have a necessary condition that holds independently of the threshold constants, I will take it.
| for (const absent of scenario.gold.expectedAbsent) { | ||
| if (normalizeContent(absent.predicate.value).length === 0) { | ||
| diagnostics.push(`${label}.gold.expectedAbsent.${absent.id}.predicate: empty-after-normalization`); |
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If an expected-absent predicate is a normalized substring of an expected-claim predicate, any injected claim satisfying the positive expectation necessarily also violates the absence expectation. Such a scenario passes this lint but can never receive a passing score (for example, positive "use redis" and absent "redis"), making failures independent of historian quality; compare absent predicates against expected claims during freeze lint and reject these contradictions.
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Already addressed in 2594572, which landed between your rounds.
lintScenario compares every expected-absent predicate against each gold claim's predicate value and emits contradicts-<claim-id>, with a test using LRU cache against the in-process LRU cache gold — your worked example. No further change was needed here.
| const turns = array(transcriptValue.turns, `${label}.transcript.turns`).map((entry, index) => | ||
| parseTurn(entry, `${label}.transcript.turns[${index}]`), | ||
| ); | ||
| if (turns.length < 2) fail(`${label}.transcript.turns: too-few-turns`); |
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Only a minimum turn count is enforced, so a compact artifact with thousands of short turns and ballastTokensPerTurn: 50000 passes parsing. lintScenario() then materializes roughly 200,000 ballast characters for every turn before checking headroom, allowing freeze lint or CI to consume gigabytes and hang or OOM despite the per-field operational maxima; cap the turn count or aggregate rendered size before constructing the transcript.
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Already addressed in 2594572.
MAX_TRANSCRIPT_TURNS (100) and MAX_TURN_TEXT_CHARS (20,000) are enforced during parse, and ballastTokensPerTurn is capped at 50,000, so the multiplied mass is bounded before lintScenario materializes any ballast. Both maxima have rejection tests. The comment above the constants records why the bound is on the product and not per field.
Governance: approvals now bind releaseApprovalFingerprint over the release version, tuple, and sorted tombstones, so a prior release's privacy/gold-intent approvals cannot be replayed on a manifest that drops an errata tombstone or bumps the version. buildReleaseTuple fails closed on duplicate scenario ids (tombstones are id-keyed) and duplicate fingerprints. Freeze lint: two unsatisfiable-freeze classes now reject — an expected-absent predicate that is a normalized substring of a gold claim's predicate (contradiction), and a compartment minCount above the transcript's message capacity. The headroom check renders the transcript with the production formatBlock over production-shaped chunk blocks instead of a hand-rolled line format. Operational maxima: transcript turn count and per-turn text length are bounded before the lint renders or tokenizes anything, closing the unbounded-multiplier gap the trigger integer caps left open. Duplication: validator primitives move to a shared error-class- parameterized factory (contract-primitives.ts) consumed by both the prospective-holdout and historian-eval lanes; the prose ballast generator moves to ballast.ts and the TS/pi/rust harnesses plus the freeze lint all delegate to it; the historian-eval payload builder folds into mock-historian.ts as buildMockHistorianOutput (multi- compartment, facts, explicit unprocessed_from) with the single- compartment wrapper delegating byte-identically. Payload correctness: empty compartments without an explicit unprocessed_from throw instead of emitting -Infinity (which the production parser silently treats as an absent tag), and fact categories must be tag-shaped so a wrong-category mutation cannot structurally corrupt the facts block. A round-trip test feeds builder output through the production parseCompartmentOutput. Tests: fingerprint coverage now includes transcript text and the epilogue boundary; tombstone-drop and version-bump approval replays are rejected; the classifier guard message steers harness-booting TS-only tests to tsOpenCodeStandaloneFiles.
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| function renderedTranscriptText(scenario: HistorianEvalScenario): string { | ||
| const blocks: ChunkBlock[] = []; | ||
| scenario.transcript.turns.forEach((turn, index) => { | ||
| const ballast = ballastProse(scenario.trigger.ballastTokensPerTurn, index); |
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The lint rotates the ballast word bank with index, while every added harness method calls ballastProse(tokens) with the default seed of zero. Consequently the token count checked here is not the transcript the documented h.ballast(N) runner path sends; near the chunk-budget boundary, a scenario can pass freeze lint but produce a different-sized live chunk and violate the single-chunk assumption. Use the same seed convention in both paths or expose the per-turn seed through the harness.
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Confirmed and fixed in 7960a48.
All three harnesses expose ballast(tokens) with no seed parameter and forward to ballastProse(tokens), so the lint's per-turn index seed measured a transcript no runner can send. Because the word bank's words differ in length, that also changed the rendered byte count, so this was a size divergence and not only a text one — which is what makes it matter at the chunk-budget boundary you point at.
The lint now renders every turn with the default seed, and a new test asserts the harness's exact ballast bytes appear once per turn in renderedTranscriptText. The requirement that a runner varying ballast per turn must thread the same seed through both sides is now written into the docstring.
| const facts = [...factsByCategory.entries()] | ||
| .map( | ||
| ([category, contents]) => | ||
| `<${category}>\n${contents.map((content) => `* ${escapeXml(content)}`).join("\n")}\n</${category}>`, |
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When a valid fact contains a newline, this emits the continuation as an unprefixed line, but the production parser's FACT_ITEM_REGEX reads facts one bullet line at a time. Thus "first line\nsecond line" round-trips as only "first line", while a continuation beginning with * becomes an extra fact, so mutation and scoring tests can exercise a different fact set than requested. Reject or flatten embedded line breaks, or serialize them in a form the production parser reverses.
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Confirmed and fixed in 7960a48.
FACT_ITEM_REGEX is /^\s*\*\s*(.+)$/gm (compartment-parser.ts:90), so a continuation line matched nothing and a * -prefixed continuation became an extra fact, exactly as you describe. buildMockHistorianOutput now throws on any \r or \n in fact content, alongside the existing tag-shaped category check, and payload.test.ts covers both shapes plus a byte-for-byte round-trip through the production parser.
Rejecting rather than flattening: the caller asked for content the format cannot carry, and silently rewriting it would hide the same authored-vs-parsed mismatch one layer down.
| const start = integer(range[0], `${label}.sourceTurnRange[0]`); | ||
| const end = integer(range[1], `${label}.sourceTurnRange[1]`); | ||
| if (start > end || end >= turnCount) fail(`${label}.sourceTurnRange: range-invalid`); |
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A claim's range is checked only for numeric bounds, so a scenario whose predicate is absent from every user/assistant message in that range still returns no lint diagnostics. Such a frozen artifact can score the historian against an unauthored fact, and the later leakage gate will trust an incorrect range when deciding whether the fact-bearing raw text survived injection. Require a verifiable occurrence or evidence locator within sourceTurnRange before accepting the scenario.
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Confirmed and fixed in 7960a48.
The lint now requires a gold claim's predicate to match the messages of its declared sourceTurnRange, diagnostic sourceTurnRange: predicate-not-authored. Ballast is excluded from the evidence text so a predicate can never match generated filler.
I took the occurrence requirement rather than the evidence-locator alternative: predicates are already normalized-substring matchers, so an author who needs a paraphrase can widen the predicate, and an optional locator would grow the versioned scenario schema for a case no scenario has yet.
| for (const absent of scenario.gold.expectedAbsent) { | ||
| if (normalizeContent(absent.predicate.value).length === 0) { | ||
| diagnostics.push(`${label}.gold.expectedAbsent.${absent.id}.predicate: empty-after-normalization`); |
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The lint accepts an expected-absent predicate that never occurs in the transcript, or occurs only in the discardable epilogue. In those cases the historian is never exposed to the forbidden formation, so the absence check passes vacuously while the release claims coverage for the declared hard-negative family. Require each predicate, or an explicit evidence locator for it, in the pre-epilogue transcript.
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Confirmed and fixed in 7960a48.
Each expected-absent predicate must now occur in the pre-epilogue transcript, diagnostic predicate: not-authored-before-epilogue. Epilogue-only evidence is rejected for the reason you give: discard-last can drop it, so the historian may never be exposed to the formation.
The seven-family lint fixture had to be rewritten to satisfy this, which is the useful part of the signal — it previously used forbidden formation N placeholders that appear nowhere in the transcript, i.e. the vacuous case itself.
| const privacy = parseApproval(approvalsValue.privacy, `${label}.approvals.privacy`); | ||
| const goldIntent = parseApproval(approvalsValue.goldIntent, `${label}.approvals.goldIntent`); |
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A manifest is accepted when the privacy and gold-intent approvals name the same approver, so one actor can satisfy both governance seats despite their representing separate reviews. This defeats the independent check that the two approval kinds are intended to provide; reject manifests where privacy.approver === goldIntent.approver before treating the release as approved.
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Agreed and fixed in 7960a48.
parseManifest now rejects privacy.approver === goldIntent.approver with approvals: approver-not-independent. The two kinds exist because they are two different reviews — safe to publish, and golds encode the intended behavior — so one actor holding both seats collapses them while the manifest still presents two.
| const fingerprints = scenarios.map((scenario) => scenarioFingerprint(scenario)); | ||
| unique(fingerprints, "releaseTuple.scenarios.fingerprint"); |
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This fingerprint uniqueness check cannot detect a copied scenario assigned a new ID because scenarioFingerprint() includes scenario.id. Two otherwise identical scenarios therefore have distinct fingerprints and are accepted into the release, double-weighting the same transcript and golds despite the comment's stated duplicate-scenario guard. Compute the duplicate check from ID-independent semantic content while retaining the separate ID uniqueness check.
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Confirmed, and the code contradicted its own comment: the block claimed to guard against a duplicated scenario while the fingerprint it compared included the id.
Fixed in 7960a48 by splitting the two jobs. scenarioFingerprint keeps id and title, because approvals and tombstones bind to identity, and a new name-independent semantic fingerprint drives the duplicate check — so a copy under a new id now fails with releaseTuple.scenarios.semantic: duplicate. Title is excluded as well; relabelling is not a semantic difference.
One follow-on worth flagging: with ids required unique, the full-fingerprint uniqueness check could never fire, so it is removed rather than left as a third pass that looks like a guard and is not.
| privacyPolicyVersion: string(value.privacyPolicyVersion, `${label}.privacyPolicyVersion`), | ||
| sanitizerVersion: string(value.sanitizerVersion, `${label}.sanitizerVersion`), |
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Unlike the scenario schema, the tuple's privacy and sanitizer versions are accepted as arbitrary non-empty strings. A manifest can therefore use "made-up" versions, recompute the release fingerprint for those values, and pass parsing while presenting the corpus as privacy- and sanitizer-reviewed under policies the lane does not implement. Require the imported current constants, or explicitly validate against a supported-version registry.
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Confirmed and fixed in 7960a48.
parseReleaseTuple now pins privacyPolicyVersion and sanitizerVersion to the imported PRIVACY_POLICY_VERSION and SANITIZER_VERSION, the same way it already pinned scenarioSchemaVersion. Your point about the fingerprint is the load-bearing one: recomputing it over invented versions made the binding useless as a check, so the constants have to be compared directly. Rotating either policy is now a deliberate constant bump, which correctly invalidates prior approvals.
| unique( | ||
| expectedClaims.map((claim) => claim.id), | ||
| `${label}.gold.expectedClaims`, | ||
| ); |
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Only expected-claim IDs are required to be unique, so two entries with different IDs but the same category and normalized predicate are accepted. A scorer that checks each expectation independently can count one injected fact twice, while a one-to-one scorer would make the duplicated gold unsatisfiable; either behavior corrupts recall. Enforce uniqueness over the normalized category/predicate identity before freezing the scenario.
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Confirmed and fixed in 7960a48.
parseScenario now enforces uniqueness over (category, normalized predicate), diagnostic gold.expectedClaims.identity: duplicate. It sits at parse rather than lint so the duplicate cannot reach a freeze at all. The identity is JSON-encoded rather than string-concatenated so no category value can forge a collision.
The freeze lint and release contract accepted several artifacts that would have frozen a scenario or promoted a release without measuring historian behavior. Each gap is closed where it can fail closed earliest. Gold expectations: - A gold claim's predicate must occur in the messages of its declared sourceTurnRange. The range is what the leakage gate guards and what the scorer treats as the fact's origin, so a predicate the transcript never states names no authored fact. - A hard-negative predicate must occur in the pre-epilogue transcript. A formation the historian is never exposed to passes its absence check vacuously while the release claims coverage for the family. - Two expected claims sharing a category and normalized predicate now reject at parse: one expectation written twice either double-counts on recall or leaves the second permanently unsatisfiable. Release identity and governance: - buildReleaseTuple rejects an empty corpus, which otherwise produced a bindable fingerprint for a release that evaluates nothing. - Duplicate detection is now name-independent. scenarioFingerprint covers id and title, so a scenario copied under a new name had a new identity by construction and no identity-based check could see it. The full-fingerprint uniqueness check was dead once ids are unique and has been dropped. - parseReleaseTuple pins privacyPolicyVersion and sanitizerVersion to the imported constants, as it already did for the schema version. Arbitrary strings let a manifest present the corpus as reviewed under a policy the lane does not implement. - parseManifest rejects a manifest whose privacy and gold-intent approvals name the same approver; they are two separate reviews. Measurement fidelity: - The headroom lint renders ballast with ballastProse's default seed, the only seed the harnesses can send. Rotating the word bank per turn measured a transcript no runner produces, and because the bank's words differ in length it measured a different size, so a scenario near the chunk budget could freeze lint-clean and then split its live chunk. - Whitespace-only strings now reject alongside empty ones in the shared contract primitives. Production formatting trims and can discard such a message, and a blank probe question or answer is not scoreable. - buildMockHistorianOutput rejects multi-line fact content. The production parser reads one bullet line at a time, so a continuation was dropped, or promoted to an extra fact if it began with "* ". Lane wiring: - test:historian-eval-unit now runs in CI, sharing the pure-data contract job, and is exposed as a root script. Nothing invoked it before, so the contract and freeze lint could regress with CI green. - tsOpenCodeStandaloneFiles claims the existing entries of HISTORIAN_EVAL_HARNESS_TESTS. The exclusion previously pointed at a destination that did not claim it, so adding runner.test.ts would have failed assertSrcTestsClassified on every CLI path.
Wiring the lane as a step inside prospective-release-holdout left it unenforced: steps in one job short-circuit, and that job's first contract step is currently failing for an unrelated reason, so the historian-eval step was skipped on its first run. A separate job gives the lane its own signal, which is the whole point of adding a caller for it.
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| unique( | ||
| expectedAbsent.map((absent) => absent.id), | ||
| `${label}.gold.expectedAbsent`, | ||
| ); |
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When two expectedAbsent entries use different IDs but the same family and normalized predicate, parsing and linting both accept them. A single forbidden formation is then represented as multiple gold checks, so a per-expectation scorer can double-count one false promotion and distort the scenario result; enforce uniqueness over (family, normalized predicate) as is already done for expected claims.
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Agreed and fixed in 7a6b3c9.
parseScenario now enforces uniqueness over (family, normalized predicate) for expectedAbsent, diagnostic gold.expectedAbsent.identity: duplicate, mirroring the expected-claim check.
Family stays part of the identity on purpose: the same forbidden formation legitimately exercises two declared families, and the lint requires each declared family to carry at least one absent predicate. There is now a test pinning that case as legal, so a later tightening does not quietly break it.
Worth saying plainly — I considered this symmetry when adding the claim-side check last round and left it out as unrequested scope. That was the wrong call; the asymmetry was the finding.
| families: scenario.families, | ||
| transcript: scenario.transcript, | ||
| expectedHistorianRuns: scenario.trigger.expectedHistorianRuns, | ||
| gold: scenario.gold, | ||
| probes: scenario.probes, |
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Fresh evidence beyond the earlier duplicate-scenario fix is that scenarioSemanticPayload() hashes families, gold arrays, and probes in authored array order. A copied scenario with a new ID can therefore evade the duplicate guard merely by reordering expectedClaims or probes, even though it runs the same transcript and checks, allowing the release to double-weight one evaluation; canonicalize these set-like arrays before computing the semantic fingerprint.
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Confirmed and fixed in 7a6b3c9.
canonicalJson's own docstring says "preserved array order", which is exactly the mechanism your report needs, so permuting expectedClaims or probes did change the semantic fingerprint.
scenarioSemanticFingerprint now reorders families, both gold arrays, and probes by each entry's canonical serialization before hashing — by serialization rather than by id, so the normalization still holds if a copy also renumbers its ids. transcript.turns is deliberately left alone; turn order is meaning, not presentation. Both directions are tested: a permuted copy is rejected as a duplicate, and a transcript with two turns swapped is accepted as a genuinely different scenario.
One scoping note: this is confined to the duplicate guard. scenarioFingerprint stays order-sensitive, so re-ordering an authored file changes its identity and invalidates its approvals — the honest outcome for an edited artifact.
| const expectedAbsent = array(goldValue.expectedAbsent, `${label}.gold.expectedAbsent`).map((entry, index) => | ||
| parseExpectedAbsent(entry, `${label}.gold.expectedAbsent[${index}]`), | ||
| ); |
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A scenario may contain arbitrarily many expectedClaims and expectedAbsent entries because neither array is capped before parsing. lintScenario() then compares every absent predicate with every claim, so a compact artifact with thousands of unique entries can force tens or hundreds of millions of normalization and substring operations and hang or exhaust CI during freeze lint; enforce operational count limits before mapping these arrays.
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Confirmed and fixed in 7a6b3c9.
MAX_EXPECTATION_ENTRIES (100) now bounds expectedClaims, expectedAbsent, and probes, checked before the arrays are mapped as you asked. probes is included even though it is not in the quadratic loop: leaving one authored array uncapped beside two capped ones is the same asymmetry that produced your other finding this round.
The distinction that makes this a limit rather than a lint diagnostic is the one you identified — the quadratic work happens inside lintScenario, so an oversized artifact hangs the freeze lint instead of failing it, and a check that never returns is not a gate.
| const sourceClaimRef = | ||
| "sourceClaimRef" in value | ||
| ? staticId(value.sourceClaimRef, `${label}.sourceClaimRef`, EXPECTED_CLAIM_ID_RE) | ||
| : undefined; |
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When an exact or multiple-choice probe omits sourceClaimRef, the parsed contract contains no source range for its gold answer. If the supporting turns are later trimmed by the injection budget, the runtime cannot apply the documented trimmed-by-injection-budget ERROR precondition and may instead score the unanswerable probe as a model failure, contaminating probe accuracy; require a claim reference or another explicit evidence locator for every such probe.
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Confirmed and fixed in 7a6b3c9. sourceClaimRef is now required for exact and multiple-choice probes.
Your reasoning matches what the field's own comment already claims — it "enables the trimmed-by-injection-budget ERROR (KTD6)" — which is only true if it is always present. Optional, it meant a probe could exist with no declared source range at all, and the runtime had no way to separate an injection-budget trim from a wrong answer.
Making it required also removed accreted branching rather than adding any: parseProbe's conditional key sets collapse to fixed ones, and the dangling-reference check no longer has an absent-reference case, because every probe type now carries exactly one gold reference. claim-id probes keep only expectedClaimRef — carrying both would be two names for one edge — and a test now rejects that shape. The fixture's probe-store gained the reference it should always have had.
| if (!CATEGORY_TAG_RE.test(fact.category)) { | ||
| throw new Error(`buildMockHistorianOutput: category is not tag-shaped: ${JSON.stringify(fact.category)}`); | ||
| } | ||
| if (/[\r\n]/.test(fact.content)) { |
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Fresh evidence beyond the earlier embedded-newline fix is that this check rejects only CR and LF, while JavaScript also treats U+2028 and U+2029 as line terminators. A fact such as first\u2028second therefore passes the builder, but the production FACT_ITEM_REGEX stops at the separator and parses only first, so mutation and scoring tests silently exercise different content; reject all four ECMAScript line terminators.
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Confirmed and fixed in 7a6b3c9, and I verified the mechanism rather than taking it from the spec: running the production FACT_ITEM_REGEX against * first<sep>second for all four terminators parses only first in every case, and * first\u2028* smuggled parses as two facts.
The check is now /[\r\n\u2028\u2029]/, and the test iterates all four separators across both shapes — dropped continuation and smuggled extra fact.
The m flag being the load-bearing detail is the useful part of this report: the ECMAScript LineTerminator set is wider than the two I guarded, and . refusing to cross any of them is what made the truncation silent.
Follow-on hardening in the same fail-closed direction as the previous commit, each item verified against the production code it depends on. - Expected-absent entries are now unique over (family, normalized predicate), mirroring the expected-claim identity check. One forbidden formation written twice under two ids became two gold checks, so a per-expectation scorer double-counted a single false promotion. Family is part of the identity because the same formation legitimately exercises two families, which a test now pins. - The duplicate-scenario guard reorders set-like arrays before hashing. canonicalJson documents that it preserves array order, so a copied scenario evaded the guard by permuting families, either gold array, or probes while running the identical transcript and checks. transcript.turns is deliberately not canonicalized: turn order is meaning. - expectedClaims, expectedAbsent, and probes are bounded by MAX_EXPECTATION_ENTRIES before the arrays are mapped. The freeze lint compares every absent predicate with every claim, so uncapped arrays hung lint rather than failing it. - sourceClaimRef is required for exact and multiple-choice probes. It is the only thing giving a probe's gold answer a declared source range, so without it the runtime cannot separate an injection-budget trim (the KTD6 ERROR) from a model failure and would score an unanswerable probe as one. Every probe type now carries exactly one gold reference, which collapses the conditional key sets in parseProbe and the absent-reference case in the dangling-reference check. - Fact content rejects all four ECMAScript line terminators, not just CR and LF. FACT_ITEM_REGEX uses the m flag, so U+2028 and U+2029 break a line there too; confirmed by running the production regex against all four.
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| expectedClaims: canonicalOrder(scenario.gold.expectedClaims), | ||
| expectedAbsent: canonicalOrder(scenario.gold.expectedAbsent), | ||
| }, | ||
| probes: canonicalOrder(scenario.probes), |
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canonicalOrder() still serializes each expectation and probe with its contract-local id, so a copied scenario is accepted after renaming the expected-claim, expected-absent, and probe IDs and updating the probe references, even though it runs the same transcript and checks. This contradicts the duplicate guard’s stated support for renumbered copies and allows one evaluation to be double-weighted; construct the semantic fingerprint without local IDs and resolve references to the referenced claim semantics.
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Confirmed, and my own comment on that helper claimed the opposite — it said sorting by serialization "keeps the normalization honest if a copy also renumbers its ids", which was simply false while the serialization still contained the ids. Fixed in 285908d.
The duplicate key is now built by scenarioDuplicateKey, which drops the scenario id and title, drops the contract-local exp-*, abs-*, and probe-* ids, reorders the set-like arrays, and resolves each probe reference to the referenced claim's own id-free semantics — that last part is what makes the renumbering invisible, as you said it had to be. transcript.turns stays ordered; turn order is meaning.
The test renames every local id in the fixture and rewrites the references, then asserts the copy is rejected as a duplicate.
| // the intended behavior. One actor holding both seats collapses them into a | ||
| // single judgement while the manifest still presents two, so the manifest | ||
| // would overstate the review the release actually received. | ||
| if (privacy.approver === goldIntent.approver) fail(`${label}.approvals: approver-not-independent`); |
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Fresh evidence beyond the earlier distinct-actor fix is that this exact comparison accepts the same actor under trivially different spellings: for example, privacy approver "alice" and gold-intent approver " alice " both parse and satisfy the independence check because authored strings are preserved without trimming. A manifest can therefore still present one reviewer as two governance seats; require a canonical approver identifier or compare normalized identities.
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Confirmed and fixed in 285908d.
The comparison now runs through normalizeContent (trim, case-fold, whitespace-collapse), so "alice" and " alice " are recognized as one actor. Your framing of the mechanism is right and worth restating: the string validator deliberately preserves the authored value so fingerprints stay byte-exact, which is exactly why the comparison rather than the stored value has to normalize.
I took the "compare normalized identities" option rather than requiring a canonical approver format. Handles, emails, and directory ids are all plausible and org-specific, so the lane normalizes what it is given instead of legislating the shape — the reasoning is in the comment. The test covers the identical, padded, and case-differing spellings.
| unique( | ||
| probes.map((probe) => probe.id), | ||
| `${label}.probes`, |
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Only probe IDs are checked for uniqueness, so an exact, multiple-choice, or claim-ID probe can be copied verbatim under a new ID and still pass both parsing and lintScenario(). The resulting aggregate counts the same question and answer twice, silently overweighting that behavior in probe accuracy; enforce uniqueness over each probe’s ID-independent semantic content.
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Confirmed and fixed in 285908d.
Probes are now unique over their id-free content as well as their ids, diagnostic probes.identity: duplicate, which closes the last of the three arrays.
probeIdentity is the single definition of "the same question" — normalized question, normalized gold answer, sorted normalized choices, and the backing gold reference — and it is shared by this check and the duplicate-scenario key, so the within-scenario and cross-scenario views cannot drift apart. Three tests pin the boundary: a verbatim copy under a new id is rejected, a copy differing only in whitespace, case, and choice order is rejected, and two probes asking the same question of different claims stay distinct.
…g-blind Three follow-ons in the same direction, each closing a hole the previous round's fix left open. The duplicate-scenario guard now strips every label, not just the scenario name. It previously serialized each expectation and probe with its contract-local id, so a copy that renamed `exp-*`, `abs-*`, and `probe-*` and rewrote its probe references passed — while the code comment claimed the opposite. `scenarioDuplicateKey` drops the local ids and resolves each probe reference to the referenced claim's own id-free semantics, which is what makes the renumbering invisible. Probes are now unique over their id-free content as well as their ids, matching the two gold arrays. A probe copied verbatim under a new id asked one question twice and double-weighted that behavior in probe accuracy. `probeIdentity` is the single definition of "the same question" and is shared by this check and the duplicate key, so the two views cannot drift. Approver independence compares normalized identities. The string validator preserves the authored value, so `"alice"` and `" Alice "` are one actor in two spellings and the exact comparison let them hold both governance seats. The lane normalizes rather than imposing an approver-identifier format, since handles, emails, and directory ids are all org-specific.
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| goldAnswer: string(value.goldAnswer, `${label}.goldAnswer`), | ||
| sourceClaimRef: staticId(value.sourceClaimRef, `${label}.sourceClaimRef`, EXPECTED_CLAIM_ID_RE), |
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When an exact probe references a valid claim but supplies a different answer, such as "2048" for the fixture's 4096 claim, parsing and lintScenario() still accept the scenario because the reference is checked but the answer is never compared with its declared source range. The frozen probe can therefore reward a hallucinated answer and mark the transcript-supported answer wrong, corrupting probe accuracy; require the normalized answer to be evidenced in that range or add an explicit answer-evidence binding.
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Confirmed and fixed in 06524fb.
Parsing proved the reference RESOLVED and never looked at the answer, exactly as you describe. The lint now requires the normalized gold answer to appear in the source range of the claim the probe references, diagnostic goldAnswer: not-authored-in-source-range, for both exact and multiple-choice probes.
Checked against the referenced range rather than the whole transcript on purpose: that range is what the probe claims as its provenance, so an answer supported elsewhere in the transcript is still a probe pointing at the wrong evidence. Two tests pin it — your 2048 case, and a probe whose answer is authored in the transcript but not in the range it names.
I took the occurrence requirement over an answer-evidence binding for the same reason as the claim-predicate rule last round: it reuses the normalization the scorer already applies, and adding a locator field would grow the versioned schema.
| string(entry, `${label}.choices[${index}]`), | ||
| ); | ||
| if (choices.length < 2) fail(`${label}.choices: choices-invalid`); | ||
| unique(choices, `${label}.choices`); |
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A probe with choices such as "Redis" and " redis " passes this exact-string uniqueness check even though probeIdentity() explicitly treats case and incidental whitespace as semantically irrelevant. Such a frozen question contains two indistinguishable answers, and a model choosing the non-gold spelling can be scored incorrectly despite selecting the same option semantically; enforce uniqueness over normalizeContent(choice).
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Confirmed and fixed in 06524fb: unique(choices.map(normalizeContent), ...).
This one was self-inflicted — I introduced the inconsistency last round by normalizing choices inside probeIdentity while leaving the uniqueness check on raw strings, so the contract disagreed with itself about whether case and whitespace distinguish an option. Your framing is the right test for it: if probeIdentity says two spellings are the same answer, a question containing both has two indistinguishable options.
I left the goldAnswer membership check exact. With normalization-equal choices now rejected, exact includes is unambiguous, and a gold answer whose spelling does not match any authored choice is an authoring inconsistency worth failing on.
| const claimSemantics = (claim: ExpectedClaim): Record<string, unknown> => ({ | ||
| category: claim.category, | ||
| predicate: claim.predicate, | ||
| sourceTurnRange: claim.sourceTurnRange, | ||
| }); |
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Beyond the earlier ID and array-order fixes, a copied scenario can still evade the duplicate guard by changing only a claim predicate's case or whitespace. predicateMatches() and expectation uniqueness normalize those differences, so the scenario evaluates identically, but this key hashes the raw predicate object and produces a different semantic fingerprint, allowing the release to double-weight the same evaluation; canonicalize predicate values here before hashing.
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Confirmed and fixed in 06524fb. scenarioDuplicateKey now normalizes predicate values before hashing, for both gold arrays.
The rule I applied, since this is the third normalization gap in the same key: a value belongs in normalized form here exactly when every runtime comparison of it is normalized. Predicates qualify — predicateMatches and the expectation-identity checks all normalize, so two predicates that normalize alike match identically and the scenarios evaluate identically.
Transcript text deliberately does not qualify and is still hashed raw: it is rendered and tokenized, so its whitespace changes the chunk the historian actually sees. That distinction is now written into the comment so the next reader does not "finish the job" by normalizing it.
| // margin absorbs live-model drift, and the runner records actual chunk | ||
| // state (`hasMore`) at run time. | ||
| const chunkBudget = deriveHistorianChunkTokens(resolveHistorianContextLimit(undefined)); | ||
| const transcriptTokens = estimateTokens(renderedTranscriptText(scenario)); |
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After the ballast-seed fix, the headroom calculation still tokenizes all rendered blocks as one newline-joined string, whereas readSessionChunk() tokenizes each formatBlock() result separately and sums those counts. Token estimation is not additive across concatenation—BPE boundaries can merge across the inserted newline, and the fallback estimator rounds each call independently—so with a small margin near the budget this lint can approve a transcript that production splits into multiple chunks, invalidating the lane's single-chunk assumption; sum the same per-block estimates production uses.
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Confirmed and fixed in 06524fb, and I measured it rather than reasoning about it: on the fixture the joined estimate is 3099 tokens against a per-block sum of 3092, a 7-token gap on a 4-turn transcript.
flushCurrentBlock in read-session-chunk.ts tokenizes each formatBlock result and accumulates the counts against the budget, so the lint now sums the same per-block estimates. renderedTranscriptText becomes renderedTranscriptBlocks and returns the blocks unjoined, which makes the accounting boundary explicit rather than incidental.
A test asserts the diagnostic reports the summed figure and specifically not the joined one, so the two cannot quietly converge again. Your note that the fallback estimator rounds per call is worth keeping in view too: the gap is not only a BPE-merge artifact, it also changes shape when the tokenizer is unavailable.
…ation Four more gaps closed, each one an inconsistency between how a value is COMPARED at runtime and how the contract checked it. - A probe's gold answer must appear in the source range of the claim it references. Parsing proved the reference resolved but never looked at the answer, so an exact probe could name 2048 against the fixture's 4096 claim, rewarding a hallucination and marking the supported answer wrong. Checked against the referenced range rather than the whole transcript, because that range is what the probe claims as its provenance. - Multiple-choice options are unique after normalization. probeIdentity already treated case and incidental whitespace as the same answer, so "Redis" beside " redis " was two indistinguishable options in one question and a model picking the non-gold spelling would be scored wrong. - The duplicate-scenario key normalizes predicate values. Every predicate comparison runs through predicateMatches, so two predicates that normalize alike evaluate identically, and hashing the raw value let a respelled copy through. Transcript text is deliberately left raw: it is rendered and tokenized, so its whitespace changes the chunk the historian sees. - The headroom lint sums per-block token estimates instead of tokenizing one joined string, matching how flushCurrentBlock accumulates against the budget in read-session-chunk.ts. Estimation is not additive across concatenation: on the fixture the joined figure is 3099 against a summed 3092, so near the budget with a small margin the two answers disagree about whether the live chunk splits. renderedTranscriptText becomes renderedTranscriptBlocks, and a test pins the summed figure as the one the diagnostic reports.
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In `@packages/e2e-tests/src/ballast.ts`:
- Around line 45-49: Normalize seed before initializing the word index in
ballastProse: reject non-finite values and truncate valid fractional seeds, then
wrap negative or oversized values into the [0, words.length) range so words[i %
words.length] always resolves to a valid word.
In `@packages/e2e-tests/src/mock-historian.ts`:
- Around line 127-145: Update buildMockHistorianOutput’s fact validation to
reject fact.content with leading or trailing whitespace, in addition to the
existing single-line check, so serialized fixture values match the parser’s
trimmed output.
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Removes the `seed` parameter from `ballastProse` rather than hardening it. A negative or fractional seed did crash the generator, but no caller passes one: the three harnesses and the freeze lint all call it with a token count alone. The parameter was also the direct cause of an earlier finding — the lint rotated it per turn while every harness used the default, so lint measured a transcript no runner sends — and deleting it makes that divergence unrepresentable instead of merely guarded. If per-turn variation is wanted later it has to land here and in the harnesses' `ballast()` signatures together. `buildMockHistorianOutput` now rejects fact content that is blank or carries leading or trailing whitespace. The production parser reads each item as `unescapeXml(match.trim())` and discards empty results, so padded content round-tripped shorter than authored and blank content vanished from the fact set — the same silent authored-vs-parsed divergence as an embedded line break, reached a different way.
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| function evidenceText(scenario: HistorianEvalScenario, startTurn: number, endTurnExclusive: number): string { | ||
| return scenario.transcript.turns | ||
| .slice(startTurn, endTurnExclusive) | ||
| .map((turn) => `${turn.user} ${turn.assistant}`) |
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Fresh evidence beyond the earlier source-range fix is that production removes <system-reminder>...</system-reminder> blocks and Magic Context system directives before constructing historian chunks (read-session-formatting.ts:28-40 and read-session-chunk.ts:733-737), while this helper searches the raw authored strings. If a gold answer, claim predicate, or hard-negative predicate occurs only inside one of those stripped regions, lintScenario() accepts it as authored even though the historian never sees it, making recall/probe failures inevitable or absence checks vacuous; apply the production user-text cleaning rules here or reject such transcript inputs.
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Confirmed and fixed in a012200, and the fix is wider than the one rule you flagged.
Evidence is now searched through the production text path: cleanUserText for user messages, normalizeText for every message, in one helper that the evidence search and the block renderer both use. That closes it for all three consumers at once — claim predicates, hard-negative predicates, and probe gold answers — rather than patching each rule, and it means the renderer's byte mass and the evidence search can no longer disagree about what the historian receives.
I took "apply the cleaning" over "reject such transcript inputs" because the cleaning is a function I can call, so the lint tracks production if the stripping rules change, whereas a rejection list would go stale silently. Two tests bracket it: the predicate inside a <system-reminder> block is reported unauthored, and the identical words outside one lint clean — the second exists so the first cannot pass for the wrong reason.
Note this also picked up normalizeText, which you did not mention but which sits on the same path and affected the rendered token count.
| if (!normalizeContent(range).includes(normalizeContent(probe.goldAnswer))) { | ||
| diagnostics.push(`${label}.probes.${probe.id}.goldAnswer: not-authored-in-source-range`); |
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Fresh evidence beyond the earlier source-range fix is that this substring check accepts a wrong exact answer whenever it is contained inside the authored value: for example, an exact capacity probe with gold answer "4" passes against a source range containing only "4096". The resulting frozen probe rewards an incorrect response and corrupts probe accuracy; exact-answer evidence needs a value/token boundary or another binding that distinguishes complete supported answers from arbitrary substrings.
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Confirmed and fixed in a012200. Your "4" against "4096" case is exactly right — includes was the wrong relation for this value.
Gold answers now need a letter-or-digit boundary on both sides, so "4" no longer matches inside "4096" while "in-process lru" still matches inside a sentence and next to punctuation. Two tests, one for each direction.
Deliberately NOT extended to predicates: ContentPredicate is documented as a normalized-substring matcher and predicateMatches is what the scorer will use against historian output, so substring is its contract. A gold answer is one exact value, which is why it gets the stricter relation — the asymmetry is intentional and now stated in the helper's docstring.
| const facts = [...factsByCategory.entries()] | ||
| .map( | ||
| ([category, contents]) => | ||
| `<${category}>\n${contents.map((content) => `* ${escapeXml(content)}`).join("\n")}\n</${category}>`, |
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Fresh evidence beyond the earlier fact-content round-trip fixes is that a fact containing literal entity text such as "use <token>" does not survive this serialization. escapeXml() emits &lt;, but production unescapeXml() replaces & before <, yielding the literal character < rather than the authored text <; mutation and scoring tests therefore receive a different fact than requested. Reject entity-looking sequences or correct the encode/decode path and add a literal-entity round-trip case.
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Confirmed and fixed in a012200. I ran the real decoder before changing anything: "use <token>" round-trips as "use <token>", and the same breaks for >, ", and '. & and unknown entities like do survive, so they stay allowed — worth stating, because the naive fix of rejecting anything entity-shaped would have refused text that works.
I took the reject branch: correcting the encode/decode path means changing production unescapeXml, which is out of scope for a test-fixture builder and would be a behavior change to the parser every historian output flows through.
The check lives inside escapeXml rather than beside the fact-content rules, so compartment titles, bodies, and episode types are covered by the same guard — the mechanism was never specific to facts. Tests cover all four unrecoverable entities in fact content, a title, and the allowed cases.
| const choices = array(value.choices, `${label}.choices`).map((entry, index) => | ||
| string(entry, `${label}.choices[${index}]`), | ||
| ); |
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Fresh evidence beyond the top-level expectation-array caps is that each probe's choices array remains unbounded and is fully mapped here before being normalized and sorted again by probeIdentity(). A scenario with a permitted number of probes but very large unique choice lists can therefore consume excessive memory and CPU during parsing/fingerprinting while still passing freeze lint, and it cannot form a usable model probe; enforce a small operational maximum before mapping the nested array.
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Confirmed and fixed in a012200. MAX_PROBE_CHOICES (10) bounds the array before it is mapped.
The point about nesting is the one that makes this a separate cap rather than an oversight in the last one: the expectation caps bound how many probes exist, not how large each probe is, so the product was still unbounded. The constant is small on purpose — a question with more than ten options is not one a model can usefully answer, which is the same argument you make.
| parts: [turn.assistant], | ||
| meta: [], | ||
| commitHashes: [], |
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Fresh evidence beyond the earlier per-block token-accounting fix is that assistant messages containing a commit action and a 7–12-character hash are transformed by production compactTextForSummary(): the hash is removed from the prose and formatBlock() adds it under a commits: suffix. This renderer instead leaves the raw assistant text in parts and hard-codes an empty commitHashes, so its block bytes and token count differ from production; near the chunk budget, lint can approve a scenario whose live transcript splits and reports hasMore. Build these blocks through the same production compaction path.
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Confirmed and fixed in a012200.
The renderer now builds each block through compactTextForSummary and uses the commitHashes it returns, so formatBlock attaches the commits: suffix exactly as production does. Hard-coding an empty array meant the hash stayed in the prose and the suffix was absent — different bytes and a different token count from the live transcript, which near the budget is the split you describe.
A test asserts the rendered block contains commits: a1b2c3d4e5 and no longer contains the hash inline, so the two paths cannot drift apart silently.
This landed together with the cleanUserText/normalizeText fix from your other comment, since both are the same defect: the renderer was constructing blocks from raw authored strings instead of through the production text path. They now share one helper.
…path Five gaps, all the same underlying mistake in different places: the contract inspected the authored JSON where production inspects something else. - Evidence is now searched as the historian receives it. Production runs every user part through `cleanUserText` and every part through `normalizeText` before the chunk builder sees it, so a predicate or gold answer sitting inside a `<system-reminder>` block was accepted as authored while the historian never saw it — recall failures would have been inevitable and absence checks vacuous. One helper now applies that path, shared by the evidence search and the block renderer, so the two cannot diverge again. - Blocks are built through `compactTextForSummary`. It lifts a commit hash out of assistant prose and `formatBlock` re-attaches it as a `commits:` suffix, so hard-coding empty `commitHashes` and raw text produced different bytes, and a different token count, from the live transcript. - A probe's gold answer must be a complete authored value. Plain containment accepted "4" as evidenced by a transcript that only says "4096", freezing a probe that rewards a wrong answer. The boundary is letter-or-digit adjacency, so a complete answer still matches inside a sentence. - `escapeXml` refuses text it cannot round-trip. The production `unescapeXml` decodes `&` first, so an authored `<`, `>`, `"`, or `'` came back as the decoded character; verified against the real decoder for all five entities plus ` ` and a bare ampersand, which do survive and stay allowed. The check sits in the escaper, so titles and bodies are covered as well as fact content. - Each probe's `choices` array is bounded by MAX_PROBE_CHOICES. The nested array escaped the expectation caps: a scenario could stay under the probe cap while every probe carried an enormous option list, normalized on parse and again for `probeIdentity`.
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| return { | ||
| schema: scenario.schema, | ||
| families: canonicalOrder(scenario.families), | ||
| transcript: scenario.transcript, |
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When a copied scenario changes only internal whitespace in a transcript message, production normalizeText() collapses that whitespace, so the historian receives identical rendered blocks, but this key hashes the raw transcript and buildReleaseTuple() accepts both scenarios. This lets an evaluation evade the duplicate guard and be double-weighted; preserve turn order while canonicalizing each message through the production text-normalization path.
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Confirmed and fixed in 3c0f455 — and this one exists because my previous fix made my own earlier reasoning wrong.
Two rounds ago I deliberately left transcript text raw in the duplicate key, and wrote in the comment that turn text "is rendered and tokenized, so its whitespace changes the chunk the historian sees." That was true then. It stopped being true when the last round routed the renderer through normalizeText, which collapses exactly that whitespace — so the premise for excluding it had been removed by my own change, and you caught the consequence.
Each message is now canonicalized through the same messageAsHistorianSeesIt path the renderer uses, so a copy differing only in internal whitespace, or in a <system-reminder> block, is recognized as the same evaluation. Turn ORDER is still preserved; order is meaning, and the earlier test that a swapped-turn transcript stays distinct still holds.
| const tombstones = array(root.tombstones, `${label}.tombstones`).map((entry, index) => | ||
| staticId(entry, `${label}.tombstones[${index}]`, SCENARIO_ID_RE), | ||
| ); | ||
| unique(tombstones, `${label}.tombstones`); |
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When a later release omits an ID tombstoned by its predecessor and obtains freshly computed approvals, parseManifest() accepts it because it only checks uniqueness within the current tombstone array. Binding approvals prevents stale approval replay but does not enforce the stated invariant that tombstones persist in every later release, so a scenario already known to be wrong can be resurrected; validate the manifest transition against the preceding release or an immutable tombstone registry.
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Confirmed and fixed in 3c0f455, with the check placed outside parseManifest.
Your distinction is the important one and I want to restate it, because the code's own comment blurred it: approval binding stops a prior release's approvals being REPLAYED on a manifest that drops a tombstone, but a release that drops one and collects fresh approvals is internally consistent, so nothing caught it. The tombstones doc asserted the persistence invariant while no code enforced it; that doc now says where it is enforced instead of implying the binding covers it.
assertReleaseSuccession(previous, next) is a new export rather than a parseManifest change, because inheritance is a relation between two manifests, not a property of one document — and the first release has no predecessor, so folding it in would force every caller to invent one. It also checks version order, so the arguments cannot be supplied backwards and pass silently.
On your alternative: an append-only tombstone registry is the stronger design and I did not build it, because it needs a store this PR does not introduce. The two compose — a registry would supply the previous set to this same check. Worth flagging plainly that the checker has no production caller yet, since the promote step does not exist; it sits with parseScenario, parseManifest, and buildReleaseTuple, which are in the same position.
Normalizing the transcript in the duplicate key is a consequence of the previous commit, which is what made the earlier rationale for NOT doing it wrong. Now that the renderer runs every message through cleanUserText and normalizeText, two transcripts differing only in internal whitespace or in a `<system-reminder>` block reach the historian as identical blocks — the same evaluation under two spellings. Each message is canonicalized through that same path; turn ORDER is still preserved, since order is meaning. `assertReleaseSuccession` enforces the errata invariant the tombstones field documents. Approval binding stops a prior release's approvals being replayed on a manifest that drops a tombstone, but a release that drops one and collects fresh approvals is internally consistent, so a scenario already known to be wrong could be resurrected. Inheritance is a relation between two manifests, so it lives outside parseManifest rather than being forced on every caller — the first release has no predecessor. Version order is checked so the arguments cannot be supplied backwards and pass. The field doc no longer claims an invariant nothing enforced.
Resolves the one conflict, in .github/workflows/ci.yml. Both sides only added a job at the same anchor — main's release-qualification-gate and this branch's historian-eval-contracts — and the textual merge interleaved them because they share the same checkout and setup-bun scaffolding. Resolution keeps both jobs whole: each job body in the result is byte-identical to the side that defined it, and the resulting job set is exactly main's plus historian-eval-contracts. Merged rather than rebased: the branch is published and its review threads are anchored to these commits.
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Stack 2/5 for the historian structural eval lane (beads
magic-context-x4l.11). Base: #69.Versioned artifact schemas for the lane: a scenario file carries an authored transcript, gold expectations over the injection-visible claim set, and structured-answer-only probes (KD2 — no free text ever reaches scoring). Fail-closed hand-rolled validators in the prospective-holdout style: unknown keys, free-text probe answer types, and literal claim-id golds reject with named diagnostics that never echo artifact values.
Key properties, all test-backed:
--historian-eval-unitregistered inrun-test-selection.tsandpackage.json(test:historian-eval-unit).Verified:
bun run test:historian-eval-unitgreen.Stack: 1/5 plumbing → 2/5 (this) → 3/5 engine → 4/5 corpus+governance → 5/5 CI
Summary by CodeRabbit
New Features
Bug Fixes
Tests