Blog publication task for PR #1084

Source: #1084
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Why 338 specs looked broken when only 218 were

DRAFT — Merged PR; unpublished blog draft

PR: #1084

Head SHA: a41600ad7f921412e64a47e3c4185b7dcc487743

This file is an unpublished artifact, not an instruction to an agent.

Merged PR; unpublished blog draft. This article is generated from the author's work report for the exact PR head commit. Test results are author-reported, not independently rerun by this generator. Merge status is not proof of deployment or runtime correctness.

Work report

The Spec Explorer called 338 specs broken. With the js/ts value-layer fix vendored from t27, the manifest reports 218, and 71 specs that emit a real but incomplete artifact are counted apart as partial instead of being called either whole or broken.

What changed

• t27-corpus.mjs derives partialBackends and notEmitted from the compiler's own targets.js.notEmitted field rather than regexing __NOT_EMITTED__ back out of the emitted code.
• A spec whose backends all emit, but where one of them omitted declarations, is now health warn and tagged issue/backend-partial instead of counting as fully working.
• notEmitted across backends is combined with a maximum, not a sum: one declaration refused by both js and ts is one missing declaration, not two.
• onboarding.t27 gained HEALTH_FAIL_UNPARSED and HEALTH_PARTIAL, both derived from the manifest by onboarding-from-spec.mjs so neither number can be typed by hand.
• A prose sentence asserting a count that nothing checked was replaced by an explanation of the class plus a constant the manifest verifies.
• Regenerated the vendored compiler wasm, manifest.json, shared-core.json, universe-atlas.json, agents.t27 and llms.txt against the new corpus of 1419 specs.

Context and reasoning

The health chip on app.t27.ai counted 338 broken specs, and that number turned out to describe how the js and ts backends reported failure rather than how many files were damaged.

A declarations-only backend has a third possible answer: an artifact that is real but incomplete, printing every declaration it can and naming in __NOT_EMITTED__ each one it could not.

Per-backend omission counts are combined with a maximum rather than a sum, because a single declaration refused by both js and ts is one missing declaration and not two of them.

The five compiled backends receive null for that field rather than zero, so a catalog reading the manifest can tell no such question apart from no omissions at all.

Every printed constant is derived from the manifest, so a corpus that grows by five specs in the middle of landing cannot leave a stale hand-typed number behind it.

Reported verification

• [passed] Command: npm run check:onboarding. Result: reports the generated documents are up to date. Evidence: iterated sync, regenerate, sync until the printed constants stopped moving at corpus size 1419
• [passed] Command: npm run check:spec-catalog. Result: the compiler is pinned at the new content hash. Evidence: prints compiler pinned at ?v=bb39b9a5ca412a26, derived by t27-wasm-tag from the new wasm bytes
• [passed] Command: node apps/website/scripts/t27-corpus.mjs. Result: manifest health counts 1017 ok, 184 warn and 218 fail. Evidence: the same corpus read 976 ok, 100 warn and 338 fail before the vendored compiler changed
• [passed] Command: cargo test --bin t27c (upstream gHashTag/t27, branch fix/js-ts-value-layer). Result: 1736 tests passed with none failing. Evidence: 1736 passed, 0 failed, 2 ignored; the artifact vendored here is built from that branch

Limits and open questions

• The 218 specs still counted broken produce no AST at all, so no backend can serve them; that parser work is deliberately not in this change.
• These health numbers only move on the live site once the upstream t27 compiler change lands and the wasm vendored here is rebuilt from it.
• Seven specs parse and then lose exactly one backend, six verilog_hir and one verilog, and this branch does not examine them.
• Test results are reported from local runs on this machine and are not independently rerun by the report generator.

Receipts

• gHashTag/trinity PR #1084
• Reported head commit a41600ad7f92
• Merge commit 5afa6a1085ad

Topic tags

#t27 #SpecExplorer #compiler #codegen