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[GH-ISSUE #6217] [Bug] Artifact integrity contradictions support static/runtime cochange hypotheses #3785
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opened 2026-10-31 00:44:01 +00:00 by bsakaguchi
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Originally created by @coygeek on GitHub (Oct 22, 2026).
Original GitHub issue: https://github.com/morluto/rea/issues/6217
Before submitting
Area
Evidence, artifacts, or reconstruction
Observed behavior
correlate_static_and_runtimecounts a selected artifact integrity contradiction as a supporting cochange hypothesis. In the observed MCP workflow, two ASAR members had identical bytes and different integrity trust, while a synthetic retained runtime pair differed in terminal output. The correlation returnedstatic.status: "contradiction"andstatic.conclusion_kind: "contradiction"alongsideobserved_pattern: "cochanged",classification: "hypothesis", and one counted hypothesis.Reproduction
In a prepared checkout, save the following test as
tests/boundary/mcp/correlationIntegrityRepro.test.ts, then run the command below. This is the executed verifier test with its temporary filename replaced by the neutral filename shown here. One completed run reproduced the behavior and passed the genuine-content-change control. An initial harness-only attempt stopped before artifact inspection because it tried to parse the open response as Evidence; the test below corrects that helper.Expected behavior
Preserve the distinction between an artifact integrity contradiction and an observed static member change. When the selected finding establishes only that declared and observed hashes disagree, it must not support a cochanged hypothesis as though it established changed member content. Preserve the contradiction and source citations; an unresolved or contradictory outcome is acceptable. A genuine static-content change paired with changed terminal output should remain eligible to support an explicit cochange hypothesis. This does not establish causality.
The registered correlation contract evaluates exact selected findings. The integrity continuation contract identifies a mismatch as a contradiction between declared and observed hashes. The original differential-workflow requirements in #37 require separating observed changes, hypotheses, contradictions and unresolved branches.
Impact and scope
P2: a bounded analytical-result defect that misstates support for the caller's hypothesis and increments the hypothesis count. The response retains the selected static contradiction fields, so callers can inspect those fields and withhold that hypothesis. The test observed those fields and retained source comparison records. No data loss, automatic reconstruction acceptance, or severe downstream incident was exercised. Broader frequency and other formats are NOT_ENOUGH_INFO; only the generated ASAR case and this MCP transport were run.
REA version
Source commit
c465ff5a81(main)Runtime and platform
Node.js v26.12.0; macOS 27.0.1; arm64; Vitest 5.0.3. The repository pins Node 24.18.0; the executed run used the installed Node version. No native decompiler was needed.
Target and artifact context
Three generated ASAR archives containing main.js. One was packaged with console.log('ok'); followed by a newline and then had its embedded bytes replaced with the equal-length console.log('no'); text, leaving a stale declared digest. A second was correctly packaged from the replacement text, giving identical observed member bytes. A third correctly packaged the original text as a genuine-content-change control. Runtime inputs were synthetic canonical retained capture fixtures with different terminal frames; no target process was launched.
Interface
MCP
Earliest failure stage
Native analysis or reconstruction
Relevant output or evidence
The real artifact provider and public artifact comparator produced an integrity contradiction for identical main.js member bytes. The public runtime comparator accepted canonical synthetic capture fixtures and reported terminal changed. The public correlation call then returned:
The response passed the SDK's validation against the actual advertised output schema. The separate verified-artifact control had a genuine main.js content change and also returned a supporting hypothesis. No real application runtime capture or reconstruction verification was executed.
The test also printed memberBytesIdentical=true and hashStatuses=["mismatched","verified","verified"]. The first two artifacts therefore demonstrate that the selected integrity finding alone does not establish changed member content.
Typed outcome or recovery expected
Withhold the supporting cochange hypothesis and its hypothesis count for this integrity-only contradiction, while retaining the contradiction and Evidence closure. The precise unresolved or contradictory representation can follow the existing result contract.
Analysis or suspected cause
Source-derived: the artifact integrity classifier emits contradiction before comparing member content. The selected-static projection preserves its contradiction status and conclusion kind. The observed-pattern calculation then treats any non-unchanged status other than unknown or truncated as changed. The hypothesis classification accepts the resulting cochanged pattern. This explains the observed response without requiring a change to the artifact producer.
Additional context
Related #5866 reports incorrect supporting/contradicting roles in the artifact comparison's unknown ledger; this report concerns the correlation consumer's hypothesis result. #2798 addresses inconsistent function-comparison aggregates, rather than this valid artifact-integrity finding. Searches covered open/closed issues and PRs with the tool name, staticRuntimeCorrelation filename, and cochanged/contradiction/integrity symptoms; no matching report was found.
Fetched upstream main at
ce5bc8cb01. Inspection of relevant changes found canonical digest refactoring but no change to this status classification. Persistence on that revision is source-derived; execution used the revision stated above. The test's assertions describe the incorrect baseline behavior and its valid-change control, not a fixed implementation.@gongfpp commented on GitHub (Oct 22, 2026):
I would like to take a focused fix at the correlation classification boundary: keep integrity contradictions unresolved rather than infer an observed change, preserve the selected finding and source citations, and add a real ASAR/MCP regression with a genuine-content-change control. I will also check function conclusion_kind and runtime contradiction handling at that same boundary so a status-only patch does not leave equivalent cases behind. Truncation/unknown precedence and ordinary cochange hypotheses should remain intact; no new output fields or target authority are proposed. Is anyone already working on this? #6298 addresses the separate process aggregate/schema issue, not this fix. This AI-assisted PR will stay draft pending human-owner review and readiness.