feat(e2e): wire metamorphic evaluation CI - #102
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📝 WalkthroughWalkthroughThe pull request adds metamorphic unit-test selection and package validation. It adds live evaluation contract coverage and integrates standalone and live metamorphic evaluation jobs into GitHub Actions with dispatch controls, serialized runs, validation gates, and report artifacts. ChangesMetamorphic evaluation
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to This PR adds scheduled and manual live evaluations plus CLI selection controls, but overlapping dispatches can silently drop a requested evaluation and conflicting mode flags can run an unintended selection. Merge should wait for an explicit dispatch policy or durable handling for superseded runs and rejection of conflicting mode values. Suggested reviewers: Poem
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Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 4 files. (5 skipped: 5 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Code Review SummaryStatus: No Issues Found | Recommendation: Merge Files Reviewed (14 files)
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Reserve the longest completed role before admitting the next one in the live metamorphic runner. The deadline was checked as a bare `now >= deadline` between roles, so a role could start with no budget left and still run to its own wait bound. One role drives `trigger.expectedHistorianRuns` historian runs, each bounded by the live per-run wait budget, so a role admitted just under the 290-minute deadline could run past the workflow's 300-minute step timeout and be killed before writing the final report. The historian lane already keeps this reserve for its next scenario; the metamorphic lane now uses the same learned estimate, so a slow role costs the final report rather than the whole artifact. Make the live workflow's concurrency group cover the run instead of each job. Both live lanes declared the same per-job group, which left one lane pending while the other ran. GitHub keeps only one running and one pending member per group and evicts the pending member when a new one queues, even under `cancel-in-progress: false`, so a dispatch overlapping a run in flight silently cancelled the queued lane. The lanes now serialize through `needs` with a `!cancelled()` guard, which also keeps them off the shared API key at the same time without letting a red historian lane skip the metamorphic one. Move the metamorphic gates out of the historian contracts job. As steps they were skipped whenever an earlier historian step failed, so a change breaking both lanes reported only the historian half and produced no metamorphic report. They now run in their own job with no `needs`, which is the rule the neighbouring lanes in this workflow already follow.
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Bound the deadline reserve by the role's declared cost, not only by observed role time. A learned-only estimate can be talked down by a run of fast roles: three roles finishing in seconds leave a reserve of seconds, which then admits a role declared to drive two historian runs. The reserve is now the maximum of the scenario's declared cost (`trigger.expectedHistorianRuns` times the enforced per-run wait, which is a real bound rather than an estimate) and the longest role observed, which still covers what the declared bound omits: probe answers, session setup, persistence. `historianWaitBudgetMs` is exported so the bound comes from the same source the runner enforces, and `roleBudgetMs` lets a caller override it. Refuse product pairs when the control tier produced no measurement. Agreement is not a measurement: two ERROR controls agree on every invariant, so the disagreement gate passed and the lane went on to spend tokens on every product pair and publish a report whose `tierInvalidReason` was null. A provider outage or an unresolved `opencode` scores ERROR repeatably, so this was reachable whenever the environment was broken. FAIL stays admissible, because a scenario the historian genuinely fails is a valid repeatable baseline and stability under transformation is what the product pairs measure. The new tier-invalid reason gets its own operator message rather than falling through to the disagreement text, which would have sent someone hunting for nondeterminism when nothing was ever measured.
The rest of the stack merged to main while this branch was open, and main had independently fixed the two runner problems this branch's review rounds addressed. Main's versions are kept, because they are the more complete of the two: - The deadline reserve is a configured `roleBudgetMs`, computed in the script from the corpus's declared historian runs, plus a preflight that refuses a `--deadline-minutes` no larger than one role. That is a real upper bound and it fails fast, where this branch had inferred the reserve from observed role time. - The control tier already rejects ERROR runs as `control-error` and also skips derivatives after an ERROR baseline, which this branch did not do. So `live.ts`, `report.ts`, `run-metamorphic-eval.ts`, and the historian runner are taken from main unchanged, and this branch keeps only the CI wiring that is actually its subject: the standalone metamorphic contracts job, the `live-metamorphic` lane, and that lane's concurrency fix. Reconciling `live.test.ts` against main's runner, all cases where the test encoded a contract main has since changed on purpose: - A baseline is memoized per base scenario and shared across its pairs, so its artifact directory is keyed on the base id. - Canary coordinates name the transform that produced the run, and only the derivative ran one, so every other role reports null coordinates. - The deadline report and the completed report are both published to the progress sink, so each run emits one more progress event than before. - Inline fixture transforms need `preservesTurnText`, which decides whether admission verifies `turnMap` against the transcript. The partial-report paths in these tests were hardcoded as `report.partial.json`. The partial is now derived by appending rather than substituting, so those literals pointed at a path the code never touches: one test could no longer reach the refusal it names, and two assertions were passing vacuously. They now derive the path with `partialReportPath`, and the refusal test was confirmed to fail when the guard it covers is removed.
Main advanced again while the previous merge was in flight. The only conflict was the append-only beads interaction log, resolved as the union of both sides with no record dropped or invented. The metamorphic gates and the live lane's concurrency fix are unchanged.
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Inline comments:
In @.github/workflows/historian-eval.yml:
- Around line 55-57: Replace the historian-eval concurrency-only queuing around
the concurrency group with a durable queue or explicit dispatch policy that
records every superseded invocation while preserving serialized execution.
Ensure repeated manual dispatches and overlapping triggers cannot silently drop
live-evaluation runs or reports, and update the workflow’s existing handling
without changing unrelated jobs.
Apply the same fix in `@packages/e2e-tests/src/metamorphic-eval/live.test.ts`
around lines 93 - 97.
Apply the same fix in @.github/workflows/ci.yml around lines 557 - 559.
In `@packages/e2e-tests/scripts/run-test-selection.ts`:
- Line 274: Update the mode-selection conflict handling around selectionConflict
so repeated --mode arguments with different values, such as ts and rust, are
rejected instead of allowing the later value to overwrite the earlier one;
preserve valid repeated identical modes and the existing unit-selection conflict
behavior.
Apply the same fix in @.github/workflows/ci.yml at line 554.
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The unit-selection branch already rejected a second, different selection, but the `--mode` branch only treated a preceding unit selection as a conflict. A second `--mode` with a different value fell through and overwrote the first, so `--mode ts --mode rust` ran the rust selection instead of failing the exact-one-selection check. Confirmed from the CLI: it reported "Running 38 selected test files in 2 phase(s)" rather than rejecting. The conflict test now mirrors the unit branch, so a differing value conflicts while a repeated identical one still passes. `parseArgs` is exported to cover the selection grammar directly, alongside the other helpers this test file already imports from the script.
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| --scenarios "$SELECT_PATH" \ | ||
| --scenario "${METAMORPHIC_SCENARIO:-hse-webhook-docs-injection}" \ | ||
| --transform "${METAMORPHIC_TRANSFORM:-paraphrase-irrelevant}" \ | ||
| --deadline-minutes 290 \ |
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When a role starts near this 290-minute deadline, the 300-minute step can still kill it before the report is written. Fresh evidence after the earlier deadline fix is that liveRoleBudgetMs reserves only expectedHistorianRuns * historianWaitBudgetMs; for the default scenario that is 24 minutes, while its two probes can each make two sendPrompt attempts with a 180-second timeout, adding up to 12 unreserved minutes. A role admitted around script minute 266 can therefore run until minute 302, even before accounting for the CLI preamble whose time is excluded because deadlineAtMs is initialized afterward. Include probe/preamble headroom in the configured deadline or role budget so the archive step reliably receives the final report.
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Confirmed, and it is worse than you measured. Fixed in 73946a4.
Verified each term against the code rather than the description:
- Probe
sendPromptpasses notimeoutMs(runner.tsprobe ask), so it takes the harness default —harness.tshadoptions.timeoutMs ?? 180_000. Correct. - Two attempts per probe:
driveProbecallsaskProbe, and on a null envelope calls it again behindPROBE_PROMPT_REASK_PREFIX, abortingprobe-envelope-malformedon the second. So 2 probes x 2 asks x 180s = 12 minutes. Correct.
The term you did not count: after the probe loop, driveProbes waits for historian quiescence with timeoutMs: historianWaitMs ?? historianWaitBudgetMs(mode) — another full 12 minutes, also unreserved. So for the default scenario the true per-role bound is 24 (runs) + 12 (probes) + 12 (quiescence) = 48 minutes against 24 reserved, not 36. A role admitted at the reserve boundary (minute 266) could run to 314, not 302.
Fix follows your recommendation — put it in the role budget:
- New
liveRoleWallClockBudgetMs(scenario, mode)inrunner.ts, beside the waits it composes, returningdeclaredRuns * historianWait + probes * MAX_PROBE_ATTEMPTS * DEFAULT_PROMPT_TIMEOUT_MS + historianWait. liveRoleBudgetMsnow delegates to it per scenario and takes the max across the selection. Measured: 24 -> 48 minutes forhse-webhook-docs-injection.- Both constants are now named at the sites that enforce them —
DEFAULT_PROMPT_TIMEOUT_MSis exported from the harness instead of copied,MAX_PROBE_ATTEMPTSrecords the ask-then-re-ask ladder — so the budget cannot drift from the timeouts it is budgeting for.
On the preamble: with a 48-minute reserve the last role must start by minute 242 and finishes by 290, so the 300-minute step keeps 10 minutes for the pre-deadline preamble (corpus load, selection, opencode --version, commit resolution — the lint and mutation batteries are separate workflow steps with their own clocks). I left --deadline-minutes 290 alone rather than also lowering it; if you think 10 minutes is thin for that preamble I am happy to take it down, but I did not want to change two bounds for one problem.
One test consequence worth flagging: budgets every declared historian run in a role asserted budget(2 runs) === 2 * budget(1 run). That proportionality is precisely what was wrong — the probe and quiescence terms are per-role, not per-run — so it now asserts the marginal property instead, that one more declared run adds exactly one historian wait. Added a test pinning all three terms, and confirmed it fails when the budget is reduced to runs only.
| - name: Metamorphic eval unit contracts | ||
| run: bun run test:metamorphic-unit |
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On every PR, this command reruns the complete metamorphic suite that historian-eval-contracts already executes: historianEvalUnitFiles() still includes src/metamorphic-eval/**/*.test.ts, and that job invokes it through test:historian-eval-unit. The new dedicated job therefore duplicates all of these tests, increases runner usage and historian-job duration, and makes the historian status fail for metamorphic-only regressions despite the comments describing this lane as the deliberate separate-job exception. Remove the metamorphic glob from the historian selection (and update its classification assertion) so this new job is the single owner.
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You are right, and this undercut the whole point of the job I added. Fixed in 73946a4.
Verified before changing anything: historianEvalUnitFiles() globbed both src/historian-eval/**/*.test.ts and src/metamorphic-eval/**/*.test.ts, and all 5 metamorphic files appeared in the historian selection — 100% overlap, so test:historian-eval-unit ran the entire metamorphic suite and the dedicated job ran it again. Both consequences you name were real: doubled runner time per PR, and a metamorphic-only regression failing the historian status, which flatly contradicts the comments I wrote about that job being the single owner.
Removed the metamorphic glob from the historian selection. assertSrcTestsClassified already claimed those files separately through metamorphicEvalUnitFiles, so nothing became unclassified — verified by calling it directly. Measured after: historian 495 -> 300 tests, metamorphic 196, overlap 0.
On the classification assertion you flagged: runs the metamorphic lane in the historian gate, not the host-mode suites did fail, as expected, since it asserted the coupling I removed. Its actual intent — per its own comment, stop these drifting into standaloneUnitFiles where no unit selection would pick them up, which is silent non-enforcement — is unchanged, so I kept that protection and retargeted the ownership half: the files must be claimed by metamorphicEvalUnitFiles, must not appear in historianEvalUnitFiles (the duplication you found), and must still be absent from every host-mode suite. Confirmed it fails if the glob is put back.
Worth noting the two findings interact in your favour: with the suites split, the metamorphic job is now the only thing running those 196 tests, so the historian job got faster rather than the total getting slower.
Reserve the probe phase and the post-probe quiescence wait, not only the declared historian runs. `liveRoleBudgetMs` counted `expectedHistorianRuns * historianWaitBudgetMs`, which is 24 minutes for the default scenario, but a role also spends two further phases the runner itself waits on: every probe may be asked twice and each ask is a `sendPrompt` left at the harness default of 180 seconds, and `driveProbes` then waits for quiescence bounded by another full per-run historian budget. The real bound for that scenario is 48 minutes, so the reserve under-counted by half and a role admitted just inside the 290-minute deadline could run past the 300-minute step timeout and be killed before writing the final report. The bound now lives in `liveRoleWallClockBudgetMs`, beside the waits it composes, and the two magic numbers it needs are named at the sites that enforce them: `DEFAULT_PROMPT_TIMEOUT_MS` is exported from the harness rather than copied, and `MAX_PROBE_ATTEMPTS` records the ask-then-re-ask ladder. With a 48-minute reserve the last role must start by minute 242 and finishes by 290, leaving the step's remaining 10 minutes for the preamble that runs before the deadline clock starts. The existing budget test asserted the reserve was proportional to the run count. That is exactly the assumption being corrected, since the probe and quiescence terms are per-role, so it now asserts the marginal relationship instead: one more declared run adds exactly one historian wait. Separately, give the metamorphic suite a single owner. `historianEvalUnitFiles` globbed `src/metamorphic-eval/**` as well, so `test:historian-eval-unit` ran the entire metamorphic suite and the new dedicated job ran all of it again. Every metamorphic test executed twice per PR, and a metamorphic-only regression failed the historian status too, which contradicts that job being the separate-lane exception. The glob is removed; `assertSrcTestsClassified` already claims those files through `metamorphicEvalUnitFiles`, so nothing is left unclassified, and the ownership test now pins that they appear in exactly one unit selection. Historian drops from 495 to 300 tests and metamorphic holds at 196.
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| const historianWait = historianWaitBudgetMs(mode); | ||
| const declaredRuns = scenario.trigger.expectedHistorianRuns * historianWait; | ||
| const probePhase = scenario.probes.length * MAX_PROBE_ATTEMPTS * DEFAULT_PROMPT_TIMEOUT_MS; | ||
| return declaredRuns + probePhase + historianWait; |
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Fresh evidence after the earlier reserve fix is that this still is not an upper bound for one role: it counts probe prompts but omits every sendPrompt in driveTranscript and the two trigger turns in each driveHistorianRun. Every scenario performs at least ten transcript turns, and each omitted call uses the same 180-second default timeout, so a role admitted using this reserve can legitimately consume over 30 additional minutes; in the 290-minute script inside the 300-minute workflow step, that can still kill the process before the final report is published. Add these prompt ceilings (and the per-run trigger prompts) to the role budget.
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Right again on all three counts, and this is the third round on the same defect, so I stopped adding terms. Fixed in 1b59948.
Verified your facts: scriptedTurn calls harness.sendPrompt with promptOptions that never carries timeoutMs, so every transcript turn takes the 180s default; driveTranscript sends filler + authored + post-epilogue padding turns; driveHistorianRun sends two (spike + kick) per declared run. For hse-webhook-docs-injection that is 7 filler + 3 authored + 10 padding + 4 trigger + 4 probe asks = 28 prompts, so the real bound is 120 minutes, not the 48 I reserved last round and not the 24 before that.
Rather than add a fourth phase term I changed the shape, because the enumeration is what kept failing — transcript turns, then probe re-asks, then triggers, each missed in turn, each silently shrinking the reserve:
liveRolePromptCount(scenario)derives every prompt a role sends from the scenario.fillerCount()andpaddingTurnCount()were private methods reading only the scenario, so they are now exported pure functions (fillerTurnCountFor,paddingTurnCountFor) and the runner calls those — one definition instead of a copy that drifts.liveRoleWallClockBudgetMs= promptCount xDEFAULT_PROMPT_TIMEOUT_MS+ one completion wait per run + the post-probe quiescence wait.
A derived count can still drift when someone adds a prompt, so I added the guard that was missing all along: sends no more prompts than the role budget counts runs a real scripted scenario, counts TestHarness.prototype.sendPrompt calls, and asserts the count is within budget — and not wildly under it, so the reserve stays usable rather than passing by being absurdly loose. Confirmed it fails when the transcript term is removed, i.e. it catches precisely the omission that started this thread.
Numbers after: corpus-max role budget 126 minutes, so --deadline-minutes 290 still clears the preflight and the last role must begin by minute 164. Worth being explicit that this makes the reserve conservative — it sums timeout ceilings, and a healthy role finishes far inside it — so on a slow day the lane may decline a final role while budget remains. I would rather leave budget unused than lose the report, which is the trade the deadline exists to make.
Three review rounds each found the same defect in a different place: the reserve omitted the transcript turns, then the probe re-asks, then the two trigger turns per historian run. Every prompt the runner sends carries only the harness default of 180 seconds, so each omission silently shrank the reserve, and a role admitted against it overran the workflow step timeout and lost the final report. Adding a fourth phase term would leave the same shape in place, so the count is now derived rather than enumerated. `liveRolePromptCount(scenario)` returns every prompt a role sends: the harness filler turns, the authored transcript, the post-epilogue padding, two trigger turns per declared run, and up to two asks per probe. The two turn counts were private methods that read only the scenario, so they are now the exported pure functions `fillerTurnCountFor` and `paddingTurnCountFor` and the runner calls those, leaving one definition rather than a copy that can drift. `liveRoleWallClockBudgetMs` is then the prompt count times the prompt ceiling, plus one completion wait per run and the post-probe quiescence wait. For the default scenario that is 28 prompts and 120 minutes, against 24 originally reserved and 48 after the previous round. The corpus maximum is 126 minutes, so a 290-minute deadline still clears the preflight and the last role must begin by minute 164. A derived count can still drift if a new prompt is added, so `sends no more prompts than the role budget counts` pins it against a real scripted run by counting `sendPrompt` calls. It also asserts the count is not wildly loose, so the reserve stays usable. Verified it fails when the transcript term is removed, which is the exact omission that started this. The budget tests move with the formula: the marginal cost of one declared run is now its two trigger prompts plus one completion wait, and the phase test becomes a check that all three prompt classes are counted.
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| --scenarios "$SELECT_PATH" \ | ||
| --scenario "${METAMORPHIC_SCENARIO:-hse-webhook-docs-injection}" \ | ||
| --transform "${METAMORPHIC_TRANSFORM:-paraphrase-irrelevant}" \ | ||
| --deadline-minutes 290 \ |
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Fresh evidence after the prompt-budget fix is that main still creates deadlineAtMs only after prepareLivePreamble, while this new workflow allows only ten minutes between the 290-minute script deadline and the step's 300-minute timeout. If the synchronous corpus admission and plugin rebuild take more than ten minutes, the role gate can still admit work against a clock extending beyond the step timeout; GitHub then kills the process mid-role before the canonical final report is written, leaving only incomplete partial evidence after paid calls. Start the deadline before the preamble or reduce this value by a bounded preamble allowance.
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Correct, and this is the gap I flagged in my own reply two rounds ago rather than closed. Fixed in 6a943b8 by your first option — start the deadline before the preamble.
Confirmed the ordering: deadlineAtMs was Date.now() + deadlineMinutes * 60_000 evaluated at the runLiveAndWriteReport call, which sits after prepareLiveOutputPaths, loadCorpus, selectInputs, and prepareLivePreamble. So the clock started after opencode --version and commit resolution, and a slow preamble shifted the whole deadline later. The reserve kept a role inside the deadline, but the deadline itself could end past the step bound — which is the failure you describe, and it makes the workflow's 290 < 300 comment claim something the code did not guarantee.
The deadline is now anchored at the first statement in main, so the preamble is inside the 290 rather than beside it and the nesting holds by construction. I chose that over reducing 290 by an allowance because an allowance is another number to keep true — the same enumeration problem as the role budget, one level up.
Also corrected the workflow comment, which described only the reserve; it now states both properties the bound rests on (process-start anchoring, and reserving a role's full prompt cost).
One honesty note: this is not unit-tested. main reads the clock directly and prepareLivePreamble needs a resolvable opencode, so driving it from a test would mean adding a clock seam for this one assertion. I put the anchor as the first statement in the function so a later reordering is visible at the top rather than buried, but I am not claiming a test protects it. If you would rather I thread an injectable clock through main to pin it, say so and I will.
`deadlineAtMs` was computed at the `runLiveAndWriteReport` call, so everything before it fell outside the budget: the output preflight, corpus load, selection, and `prepareLivePreamble`, which resolves `opencode --version` and the commit. A slow preamble shifted the whole deadline later, so the workflow's `deadline 290 < step 300` nesting no longer implied the run finished before the step was killed — the reserve kept a role inside the deadline, but the deadline itself could end past the step bound, and the process died mid-role after paid calls with only partial evidence on disk. The deadline is now anchored at the first statement in `main`, so the preamble sits inside it and the nesting holds by construction rather than by assuming the preamble fits in the ten minutes between the two bounds. Not unit-tested: `main` reads the clock directly and `prepareLivePreamble` needs a resolvable `opencode`, so there is no seam to drive it from a test without inventing one for this alone. The anchor is the first statement in the function for that reason, where a later reordering is visible.
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Summary
The metamorphic lane is now runnable from the CLI, enforced on pull requests without credentials, and available as a scheduled or manual live evaluation. This completes the four-PR stack.
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