9c2927bff4
* test(#4733): pin the cap, unknown-file weight, and isolation rules Failing-first coverage for the three defects that let a Windows conformance chunk be killed at the 600s per-chunk backstop with zero failing tests. The previous boundary rows were VACUOUS: they asserted literal arithmetic (21 * 18122 <= 400000) that cannot fail, and in doing so masked a shipped win32 cap of 23 -- a value that violates the very inequality they claimed to pin. These rows constrain defaultMaxFilesPerChunk itself, from both sides, so the shipped value is a derived maximum rather than a magic number. A second vacuous row was caught by review and removed: it recomputed the isolated set from the function under test using the identical predicate, so it was empty by construction. It is replaced by an exact deepEqual against the expected basenames, a cross-platform identity row, dynamism rows in both directions, an inclusive boundary triplet, and invalid-threshold throw rows. The cross-platform identity row is the regression guard for a threshold that was briefly anchored to the per-platform file-COUNT cap; it fails if isolation ever becomes platform-dependent again. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#4733): derive the win32 cap, isolation bar, and unknown weight A Windows conformance chunk was killed at the 600000ms per-chunk backstop with no test having failed, taking next red. Three compounding defects. The win32 cap of 40 permitted 40 * 18122 = 724880ms against a 600000ms backstop -- 121% of it -- so two rounds of budget-tuning could not hold. The cap is now derived: 22 is the largest value satisfying cap * 18122 <= 400000. The budget is 400000, not the raw backstop, because the chunk that died summed to only ~348328ms of per-file time -- a per-chunk overhead gap of at least 1.72x that no per-file table models. A file absent from the timings table was priced at medianWeight. The table is skewed 18.8x, so an unknown weighed 0.0533 -- 19x cheaper than average, and measured 17.5x under its real cost. Unknowns are now priced at the mean. ISOLATED_HEAVY_FILES was a static Set, stale by construction. Isolation is now derived from an absolute ms bar (0.3 * 400000 = 120000ms) converted to weight units via the live table's mean, so a file that gets heavy is isolated automatically instead of waiting for someone to edit a list. Review caught that an earlier cut anchored that bar to the per-platform file-COUNT cap -- a category error, count vs weight, which silently returned seven of the historical eight files to the shared pool on linux/darwin. Since macOS runs the full matrix only after merge, that would have planted a red next no PR could catch. The bar is absolute and platform-independent. Also from review: isolation no longer requires unit-suite membership, so fragment-single-edit-propagation.install.test.cjs -- 575000ms, 96% of the backstop in one file -- is eligible; partitionIsolatedFiles throws on a non-finite or non-positive threshold instead of silently isolating nothing; and stale per-shard figures no test pinned are removed rather than recomputed. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * chore(#4733): backfill changeset pr number --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Changeset Fragments
This directory holds per-PR CHANGELOG fragments. Every PR with user-facing changes drops one (or more) <random-name>.md files here describing its CHANGELOG entry. Fragments are consolidated into the top-level CHANGELOG.md at release time.
Why
Two PRs that both edit the ### Fixed block of CHANGELOG.md always conflict on merge — git can't pick a serialization order without human input. Two PRs that each add a fresh .changeset/<unique-name>.md never conflict because they don't share lines.
See #2975 for the full rationale.
Adding a fragment
node scripts/changeset/new.cjs \
--type Fixed \
--pr 1234 \
--body "fix the thing — explain the user-visible change in one sentence"
This writes .changeset/<adjective>-<noun>-<noun>.md with frontmatter and a body. Three random words → concurrent PRs don't collide.
Format
---
type: Fixed
pr: 1234
---
**`/gsd-foo` no longer drops trailing slashes** — explain the user-visible change.
Allowed type: values follow Keep a Changelog: Added, Changed, Deprecated, Removed, Fixed, Security.
Opting out
PRs that legitimately have no user-facing impact can add the no-changelog label. CI honors it. When unsure, add the fragment.
At release time
Promotion is automatic. The release workflow's finalize job runs:
node scripts/changeset/cli.cjs render --version vX.Y.Z --date YYYY-MM-DD --allow-empty
This reads every fragment, groups bullets by type:, replaces ## [Unreleased] with a new ## [vX.Y.Z] - YYYY-MM-DD block, opens a fresh ## [Unreleased] above, and deletes consumed fragments. The --allow-empty flag ensures a no-change release still gets a dated heading (with a _No notable changes._ placeholder). A subsequent verify step confirms the promotion landed correctly. Maintainers do not run this by hand.
Archived fragments
.changeset/archived/ holds fragments for already-shipped releases (≤ 1.3.1), retained for provenance. Their content was hand-curated into the dated ## [1.x.y] sections of CHANGELOG.md during the #690 backfill — they were never consumed by render. All changeset tooling enumerates .changeset/ non-recursively, so archived fragments are never picked up or rendered. Do not move them back to the top level.