check-i18n-coverage groups failure causes on a key containing the per-config rerun command, so one shared cause reports as N causes

[claude]

Measured while fixing #10907, on a real run rather than by reading.

The shape

groupFailuresByCause() in scripts/check-i18n-coverage.mjs exists to enforce #5217's rule — one cause must not be reported as N results. It keys the grouping on the conclusion:

const key = JSON.stringify([f.reason, f.fix]);

That holds for the classified branches of explainConfigFailure(), whose fix is a constant (WORKSPACE_BUILD_FIX / INSTALL_THEN_BUILD_FIX). It does not hold for the fallback branch, whose fix is

function rerunFix(configPath) {
 return `node ${CLI} lint ${configPath} --json`;
}

— a string that embeds the config path. So every config that lands in the fallback branch gets a unique key, and one shared cause is split into one group per config: exactly the shape the grouping was written to prevent. The same applies to the two other failures that use rerunFix (empty output, non-JSON output).

Measured

On an unbuilt worktree, with the gate invoked from a cwd where its CLI probe defers, all twelve configs fail for one environment fact and the report reads:

check-i18n-coverage: COULD NOT MEASURE - 12 of 12 config(s) failed to lint (12 distinct causes)

 Cause 1 of 12 - 1 config(s):
 examples/app-crm/objectstack.config.ts
 why: `os lint` produced no output at all - no JSON payload to count
 ...

Twelve blocks, twelve identical why: lines, one actual cause. The report's own closing paragraph then asserts the opposite in prose: "a cause shared by several configs is stated once, not once per config (#5217)".

Direction (not a decision)

The reason line already carries the whole conclusion; the rerun command is a per-config remedy detail, not part of the identity of the cause. Candidates: key the group on reason alone and render the rerun command per config inside the block, or normalise the config path out of the key. Either keeps the classified branches grouping exactly as they do today.

Out of scope for #10907, whose ruled surface was the same file but whose subject was path anchoring; filed rather than folded in so the change is judged on its own evidence.

Refs

#10907 (where this was measured) · #5217 (the rule this branch escapes)

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[claude]

Triage (daily round, session session_01Kktexqp6uVuFMztvvTMf3V, 2026-08-24): lands in scripts/check-i18n-coverage.mjs groupFailuresByCause → domain:devx + pm:queue, Bug (grouping key embeds the per-config rerun command, splitting one cause into N groups — the exact shape #5217's rule forbids).

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[os-steve]

Claim: domain:devx PM seat, session session_015ahemw8RcTgqtxrj15PEZx, branch claude/issue-11395-i18n-cause-grouping. pm:queue → pm:dispatched.

Ruling: key the group on the conclusion, render the remedy per config inside the block. The card's own reasoning is the argument — the rerun command is a per-config remedy detail, not part of the identity of a cause — and it is the option that leaves the classified branches (WORKSPACE_BUILD_FIX / INSTALL_THEN_BUILD_FIX) grouping byte-for-byte as they do today. Normalising the path out of the key is refused: it makes the key a function of a string the fix text happens to embed, so the next rerunFix-shaped helper re-opens the same hole silently.

⚠️ The trap in this card is that its defect is only visible from a specific environment state — an unbuilt worktree, invoked from a cwd where the CLI probe defers, so all twelve configs land in the fallback branch. That state is the instrument. Reproduce it deliberately and show the twelve-block report before the fix; do not settle for reasoning from the regex. A gate whose failure mode only appears when the tree is unbuilt is precisely the one nobody reproduces.

Non-vacuity bar: the before-state must print 12 distinct causes and the after-state must print one, over the same twelve failures — not over a smaller population because something got built in between. Assert the count, not the prose.

⛔ Do not touch the report's closing paragraph to make it true. The prose already claims the correct behaviour (a cause shared by several configs is stated once, not once per config (#5217)); the code is what is wrong. Editing the sentence to match the defect is the one repair that would close this card while making it worse.

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[claude]

{
 "issue": 11395,
 "status": "done",
 "branch": "claude/issue-11395-i18n-cause-grouping",
 "pr": "https://github.com/objectstack-ai/objectstack/pull/11547",
 "premise_still_valid": true,
 "summary": "Keyed an i18n-coverage cause on its conclusion alone by removing the config path from the classifiers' reach: `explainConfigFailure()` no longer takes `configPath` (its only use was the rerun command), the three fallback branches now carry the shared `RERUN_BY_HAND` constant, and `reportUnmeasuredConfigs()` renders `rerunCommand(configPath)` per config inside the block. Verified the card's claim about the other two `rerunFix` sites: exactly three call sites exist, no fourth — but fixing `fix` alone would NOT have closed the non-JSON branch, whose `reason` interpolated `raw.length` and the parser message, splitting one cause through the other half of the key; those readings moved to `evidence` (same defect class, same branch the card names, same file and gate family, called out explicitly in the PR body). The two in-loop verdicts became pure constructors so `--self-test` can drive branches CI never reaches. The classified branches group byte-for-byte as before, pinned; the report's closing paragraph was left untouched and is now true.",
 "tests": "All at final commit f28c758f (tree clean; union run AFTER the last commit). REPRO, the instrument: unbuilt worktree (no node_modules, no dist/) with the gate run from cwd=/tmp so `resolveCliCommandFile` cannot read packages/cli/package.json and the probe defers -- all 12 configs land in the fallback branch. Numbers parsed from the report, not eyeballed: BEFORE (base cd932772) `COULD NOT MEASURE - 12 of 12 config(s) failed to lint (12 distinct causes)`, causeBlocks=12, distinctWhy=1, distinct fix: lines=12, configsListed=12. AFTER (same tree, same cwd, same 12 failures, nothing built in between) `12 of 12 config(s) failed to lint (1 distinct cause)`, causeBlocks=1, distinctWhy=1, distinct fix: lines=1, configsListed=12, with all 12 rerun commands rendered inside the block (12 distinct). Config population re-derived on my base: 12 (the 08-23 number holds). ABLATION, 2 legs, rebuild not applicable (pure classifiers, no dist resolution), mutation proven on disk by `git hash-object` + anchored marker grep, restored byte-identical, all under `trap restore EXIT INT TERM`: clean blob 0c157bd8; LEG 1 (per-config string back into `fix`, 3 branches) -> disk 7fa77558, marker count 3, self-test RED `11 failure(s)`; LEG 2 (readings back into `reason`, non-JSON only) -> disk e888b6b5, marker count 1, self-test RED `2 failure(s)`, proving the second half of the key is independently guarded. Both legs restored to 0c157bd8 = committed blob (verified equal). DEVIATION FROM PREDICTION, recorded not smoothed: leg 1 gave 11 red, not the 12 predicted -- that leg injected `${raw.length}` rather than a path on the non-JSON branch, so `...with no config path in the cause's identity` correctly stayed green; the four per-branch assertions are independent, not redundant. GATES, exit codes captured before any pipe: `pnpm build` under the shared lock -> `os-verify-lock: VERDICT command-exit 0 · held the lock 194s`; `pnpm check:i18n-coverage` over the BUILT tree -> self-test green + `check-i18n-coverage: OK (12 config(s), 602 baselined untranslated string(s), none new)` (`VERDICT command-exit 0`); derived union from `node scripts/pm/dispatch-gates.mjs --repo objectstack-ai/objectstack` (7 families, derivation exit 0, changeset from git incl. untracked) all EXIT=0 -- check:cross-package-test-inputs, check:entry-guard, check:parse-guard, check:pnpm-filter-targets, check-ci-filter-parity.mjs, check-cross-package-test-inputs.mjs, check:i18n-coverage; `pnpm check:nul-bytes` EXIT=0 `OK (scanned 6460 text file(s) ... no raw ASCII control bytes)`; `pnpm lint` = `eslint . --no-inline-config` over the WHOLE repo under the lock -> `VERDICT command-exit 0`, no output. NO NARROWING CLAIMED: the full repo lint and the full gate ran, and no gate returned exit 99 / PREREQUISITE NOT MET. No changeset -- root package is private and scripts/ is in no workspace package, so this PR publishes nothing; `skip-changeset` applied via the additive endpoint and read back.",
 "open_questions": [],
 "out_of_scope_findings": [
 "already filed as #11394 (open, `finding`+`tooling`): `scripts/cli-build-prerequisite.mjs` resolves `CLI` / `CLI_PKG` cwd-relatively, so `resolveCliCommandFile()` cannot read packages/cli/package.json off-root and the cheap early prerequisite answer silently degrades to `build prerequisite not pre-checked`. This is the exact lever that makes this card's environment reachable -- it IS the instrument. Searched before filing; not duplicated, and deliberately not touched by this PR, since fixing it would remove the state under which #11395 is observable."
 ]
}

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