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perf(ci): re-measure the extended-suite weights from real CI runs - #1568
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📝 WalkthroughWalkthroughThe ChangesExtended suite balancing
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The refreshed CI weights improve shard balance, but the reproducibility note records a future measurement date of August 27, 2026. Correct that date or defer the claim before merging; the remaining risk is limited to misleading maintenance documentation. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In @.github/workflows/ci.yml:
- Around line 848-852: Correct the “Refreshed” date in the shard-weight comment
to the actual completed measurement date; do not claim August 27, 2026 unless
the cited measurements already exist. Preserve the surrounding reproducibility
details and explanatory context.
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This was referenced Aug 26, 2026
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87 assertions across five suites executed nowhere. ci.yml states the principle already — "A suite wired into nothing is documentation, not a test" — written after the OpenAI-compat catalog suite sat in no CI job, broke on any machine without GROQ_API_KEY, and nobody noticed. The same condition was live in five more places. test/continuous-test-suite-agents.ts is the worst of them: 1624 lines covering Agent, AgentNetwork, routing, MessageBus and CLI coverage, with no package.json script at all. It was reachable only by the literal command in docs/agents/TESTING.md. This adds test:agents and wires all five in. Measured under CI-like conditions — mkdtemp HOME, empty CLOUDSDK_CONFIG, DOTENV_CONFIG_PATH=/dev/null — with a preload hooking net.Socket.prototype.connect and tls.connect. None makes an external connection, and none pays the 60s MCP client timeout that .mcp-config.json imposes on suites that build NeuroLink instances. The four that use defineSuite also gain offline: true, so a hang in them fails rather than reporting a green skip — the same treatment the rest of extended-suites has. Placement was checked by walking to defineSuite's matching paren, not by grep. agents cannot take the flag: it has its own runner rather than the shared harness. That runner needed proving before wiring it into anything. A suite that cannot fail is worse than no suite, so a deliberate failing result was injected: it reported "PROBE deliberate failure: 0/1 passed", "Failed: 1", "Some tests failed!" and exited 1. The first attempt at that probe used the wrong result shape, crashed with a TypeError, and still exited 1 — proving nothing. The exit code alone was not evidence; the reported failure is. Weights are the real CI durations, not estimates. The first run wired these in at extrapolated values and its own logs replaced them: test:agents 10 -> 7 test:media-registry-collisions 4 -> 3 test:video-abort 4 -> 3 test:classifier-router 3 -> 3 test:resolve-request-kind 2 -> 1 Read from that run's ::group:: timestamps, per the method documented above the list. Verified: all five green locally through their package.json scripts, and — because a green shard proves nothing on its own — confirmed in CI by their own PASS lines in the extended-suites logs, not merely by the shard being green. The workflow's own assignment loop places all 33 suites with no duplicates, package.json still parses, check:tools-tests clean, eslint and prettier clean. Merge order: this is the third PR touching the SUITES block, after #1568 (rewrites all 28 weights) and #1571 (adds test:multimodal:sdk). Suggested order #1568 -> #1571 -> this, each later one a small rebase in that list.
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87 assertions across five suites executed nowhere. ci.yml states the principle already — "A suite wired into nothing is documentation, not a test" — written after the OpenAI-compat catalog suite sat in no CI job, broke on any machine without GROQ_API_KEY, and nobody noticed. The same condition was live in five more places. test/continuous-test-suite-agents.ts is the worst of them: 1624 lines covering Agent, AgentNetwork, routing, MessageBus and CLI coverage, with no package.json script at all. It was reachable only by the literal command in docs/agents/TESTING.md. This adds test:agents and wires all five in. Measured under CI-like conditions — mkdtemp HOME, empty CLOUDSDK_CONFIG, DOTENV_CONFIG_PATH=/dev/null — with a preload hooking net.Socket.prototype.connect and tls.connect. None makes an external connection, and none pays the 60s MCP client timeout that .mcp-config.json imposes on suites that build NeuroLink instances. The four that use defineSuite also gain offline: true, so a hang in them fails rather than reporting a green skip — the same treatment the rest of extended-suites has. Placement was checked by walking to defineSuite's matching paren, not by grep. agents cannot take the flag: it has its own runner rather than the shared harness. That runner needed proving before wiring it into anything. A suite that cannot fail is worse than no suite, so a deliberate failing result was injected: it reported "PROBE deliberate failure: 0/1 passed", "Failed: 1", "Some tests failed!" and exited 1. The first attempt at that probe used the wrong result shape, crashed with a TypeError, and still exited 1 — proving nothing. The exit code alone was not evidence; the reported failure is. Weights are the real CI durations, not estimates. The first run wired these in at extrapolated values and its own logs replaced them: test:agents 10 -> 7 test:media-registry-collisions 4 -> 3 test:video-abort 4 -> 3 test:classifier-router 3 -> 3 test:resolve-request-kind 2 -> 1 Read from that run's ::group:: timestamps, per the method documented above the list. Verified: all five green locally through their package.json scripts, and — because a green shard proves nothing on its own — confirmed in CI by their own PASS lines in the extended-suites logs, not merely by the shard being green. The workflow's own assignment loop places all 33 suites with no duplicates, package.json still parses, check:tools-tests clean, eslint and prettier clean. Merge order: this is the third PR touching the SUITES block, after #1568 (rewrites all 28 weights) and #1571 (adds test:multimodal:sdk). Suggested order #1568 -> #1571 -> this, each later one a small rebase in that list.
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… failing one and test:background-commands. All four have package.json scripts. None was named by any workflow, so 93 assertions executed nowhere — the same condition ci.yml already describes in its own words, "A suite wired into nothing is documentation, not a test", recurring within hours of the last round of it being fixed. Measured credential-free under a preload hooking net.Socket.prototype.connect and tls.connect, mkdtemp HOME, empty CLOUDSDK_CONFIG, DOTENV_CONFIG_PATH set to /dev/null. Three of them paid the MCP client timeout that the repo's tracked .mcp-config.json imposes on any suite building NeuroLink instances, and on one of them that was not merely slow: agent-delegation 356s, 18 passed / 1 FAILED, eleven 60s MCP timeouts agent-tasks 68s, 23 passed, one artifact-banking 68s, 16 passed, one background-commands 13s, 35 passed, none The delegation failure read as a real defect — "a finished worker must show as ready without being collected" — and is not one. That case asserts on task-lifecycle timing, and eleven sixty-second stalls moved the worker's state transition outside the window it checks. With NEUROLINK_SKIP_MCP set the same suite is 41s and 19/19. That is worth stating plainly, because C3 characterised this tax as making a suite slow enough to be killed by an outer bound. It also makes timing-sensitive suites report false failures, which is the more expensive half: a slow suite gets investigated, a failing one gets blamed on the code under test. So the three that build instances now set NEUROLINK_SKIP_MCP, as test:proxy and test:multimodal:sdk already do. background-commands does not need it — it never triggered the load — and it is the only one of the four that reaches no external host at all, so it is also the only one that gets offline: true. The other three still contact aiplatform/oauth2.googleapis.com (and api.openai.com, for delegation), where a timeout can legitimately be an upstream rather than a hang, so they are deliberately left unflagged — the same distinction applied to auth, dynamic, credentials and provider-descriptors when that flag was rolled out. Weights are 1.9x the local timings, the ratio measured for test:tts:unit, and are estimates to be replaced from the first real run via the log-timestamp method documented above the list. Verified: all four green through their package.json scripts with zero MCP timeouts, the workflow's own assignment loop places all 32 suites with no duplicates, offline-flag placement checked by walking to defineSuite's matching paren, eslint 0 errors, check:tools-tests clean, prettier clean. Merge order: fourth PR touching the SUITES block, after #1568, #1571 and
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… failing one and test:background-commands. All four have package.json scripts. None was named by any workflow, so 93 assertions executed nowhere — the same condition ci.yml already describes in its own words, "A suite wired into nothing is documentation, not a test", recurring within hours of the last round of it being fixed. Measured credential-free under a preload hooking net.Socket.prototype.connect and tls.connect, mkdtemp HOME, empty CLOUDSDK_CONFIG, DOTENV_CONFIG_PATH set to /dev/null. Three of them paid the MCP client timeout that the repo's tracked .mcp-config.json imposes on any suite building NeuroLink instances, and on one of them that was not merely slow: agent-delegation 356s, 18 passed / 1 FAILED, eleven 60s MCP timeouts agent-tasks 68s, 23 passed, one artifact-banking 68s, 16 passed, one background-commands 13s, 35 passed, none The delegation failure read as a real defect — "a finished worker must show as ready without being collected" — and is not one. That case asserts on task-lifecycle timing, and eleven sixty-second stalls moved the worker's state transition outside the window it checks. With NEUROLINK_SKIP_MCP set the same suite is 41s and 19/19. That is worth stating plainly, because C3 characterised this tax as making a suite slow enough to be killed by an outer bound. It also makes timing-sensitive suites report false failures, which is the more expensive half: a slow suite gets investigated, a failing one gets blamed on the code under test. So the three that build instances now set NEUROLINK_SKIP_MCP, as test:proxy and test:multimodal:sdk already do. background-commands does not need it — it never triggered the load — and it is the only one of the four that reaches no external host at all, so it is also the only one that gets offline: true. The other three still contact aiplatform/oauth2.googleapis.com (and api.openai.com, for delegation), where a timeout can legitimately be an upstream rather than a hang, so they are deliberately left unflagged — the same distinction applied to auth, dynamic, credentials and provider-descriptors when that flag was rolled out. Weights are 1.9x the local timings, the ratio measured for test:tts:unit, and are estimates to be replaced from the first real run via the log-timestamp method documented above the list. Verified: all four green through their package.json scripts with zero MCP timeouts, the workflow's own assignment loop places all 32 suites with no duplicates, offline-flag placement checked by walking to defineSuite's matching paren, eslint 0 errors, check:tools-tests clean, prettier clean. Merge order: fourth PR touching the SUITES block, after #1568, #1571 and
test:tts:unit still declared 367s. The deadlock fix in #1550 landed 33 seconds after #1546 measured it, and cut the suite to a CI median of 140s — a 2.6x overstatement that survived because nothing re-measures. Five weights are refreshed from the median of 13 runs, read out of this job's own logs via the timestamps on its ::group:: markers. Scoring both plans against the measured durations, over the 38 suites in the list as of this commit: planned shard loads go from 367/221/221/221 to 204/204/204/203, and the spread across shards from 146s to 1s. The worst shard drops from 367s to 204s. Almost all of that comes from tts:unit alone: at a declared 367s it exceeded the ideal quarter-share outright, so LPT had no choice but to give it a shard to itself and let the other three carry everything else. These figures are a property of the list, not of this change, so they move whenever a suite is added. Recompute rather than trusting them: the weights here are what was measured, and the shard arithmetic follows from whatever the list happens to contain on the day. An earlier draft of this message reported the gain as "worst shard 145s -> 141s, about four seconds", and paired a 367/137/136/136 row with a spread of 11s. Those two figures came from different datasets — the first row is the old plan's self-declared sums, whose own spread is 231s, while the 11s was the old grouping re-scored against the new weights. Neither described the list as it now stands. The numbers above are recomputed with the workflow's own LPT loop against the list in this commit. Verified with that assignment loop, extracted verbatim rather than reimplemented: all 38 suites assigned, each exactly once. The suite set is unchanged; only the numbers move. Weights affect balance only, never which suites run. The comment now says how to re-measure, because the root cause here is that nobody could. The recipe it replaces did not work: it bound the timestamp only at ::group::, never read the ::endgroup:: one, and so printed a start time and a `##[group]`-prefixed name instead of a duration. The version here prints `suite@seconds`, pastes straight into the list, avoids gawk's mktime() so it runs on BSD awk, and was executed against a captured log before being written down. Two traps are written down with it. Do not time these locally: a developer machine is faster than a runner and has credentials, so suites that skip in CI do real work. test:tts:unit measures ~73s locally against a CI median of 140s — wrong by nearly half, and wrong in the direction that makes the imbalance look worse than it is. And take a median across runs rather than one sample: test:tts:unit alone spans 95s to 155s, so a single observation can be off by 40%. test:tool-reliability and test:autoresearch are weighted at their skip times, which is correct for this job — it has no credentials — and wrong to reuse anywhere that runs them for real. That is now stated next to them.
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test:tts:unitstill declared 367s. The deadlock fix in #1550 landed 33 seconds after #1546 measured it and cut the suite to a CI median of 140s — a 2.6x overstatement that survived because nothing re-measures. All 28 weights are refreshed from the median of 13 runs, read out of this job's own logs via the timestamps on its::group::markers.The gain is small, and smaller than I claimed when I filed this
Scoring both plans against measured durations: worst shard 145s → 141s. About four seconds.
The reason is luck, not design. 140s happens to be almost exactly the ideal quarter-share of 561s, so LPT put
tts:unitalone on a shard and that shard landed on the right number for the wrong reason.What actually improves is that the plan now matches reality — verified by running the workflow's own assignment loop:
Correcting only
tts:unitwould have changed nothing at all — it is still the largest entry and still lands alone — so the full refresh is the whole of the change.Verification
Run with the workflow's assignment loop extracted verbatim, not reimplemented: all 28 suites assigned, each exactly once, 1 / 8 / 10 / 9 per shard. The suite set is byte-identical to
release— only numbers move. Weights affect balance only, never which suites run; a wrong one can make a shard slow, never skip or double-run a suite.The comment now says how to re-measure
The root cause is that nobody could. Two traps are written down:
test:tts:unitmeasures ~73s locally against a CI median of 140s — wrong by nearly half, and wrong in the direction that makes the imbalance look worse than it is. I measured it locally first and would have shipped 73.test:tts:unitalone spans 95s to 155s, so one observation can be off by 40%.test:tool-reliabilityandtest:autoresearchare weighted at their skip times — correct for this job, which has no credentials, and wrong to reuse anywhere that runs them for real. That is now stated next to them.Summary by CodeRabbit