Files
msd-core/.changeset
Tom Boucher ac1b6d679f enhance(#3618): fold fallow-runner onto the canonical binary resolver (epic #3411 Phase 2) (#3633)
* chore(#3618): fold fallow-runner onto the canonical binary resolver

Epic #3411 Phase 2. src/fallow-runner.cts was the fourth divergent
implementation of Windows binary resolution the epic enumerated —
candidateNames, isExecutableFile, findInPath, findInNodeModules, 40 lines.
All four are deleted; resolveFallowBinary is one seam call.

Two OPT-IN options were added to resolveExecutableBinary to make the fold
behavior-preserving, both defaulting off so Phase 1's callers are byte-identical:

  prependPaths      dirs searched before env.PATH, in order, through the
                    identical per-directory candidate logic. This expresses
                    node_modules/.bin-first precedence without env surgery —
                    the rejected alternative re-introduced the
                    spread-loses-the-proxy hazard the Windows lane caught in
                    Phase 1, at every future call site instead of once.
  requireExecutable POSIX-only accessSync(X_OK); a no-op on win32 where mode
                    bits do not mean execute. Opt-in rather than default
                    because unconditional X_OK breaks #3445's suite, which
                    stages candidates with plain writeFileSync and never sets
                    an exec bit — the repo bans chmod in tests — so every one
                    would resolve to null on POSIX.

Deliberate behavior change on Windows: fallow's prior candidate list ended in a
BARE fallow. The seam never tries a bare name there, so an extensionless file
beside fallow.cmd is no longer resolved. That is the fix, not a regression — the
extensionless file is npm's POSIX sh shim, which CreateProcess cannot run
(#3275). Rows 7 and 8 of the design record it.

Defect found while working, fixed inline: the resolution order was documented
BACKWARDS as PATH-then-.bin in structural-pre-pass.md, docs/INVENTORY.md and
four INVENTORY translations. The code has always been .bin first, and .bin first
is correct — a project-local tool should beat a global one. The archived
changeset is left alone as a historical record.

fallow-runner had no test file at all. tests/fallow-runner.test.cjs is new
(F1-F15) and the seam options are pinned by S1-S12 folded into the existing
dispatch suite. RED proven by execution: with both source files stashed and
build:lib re-run, 7 of 27 probe cases failed.

Refs #3411

* chore(#3618): backfill changeset pr number 3633

* fix(#3618): assert both platform contracts in F4 instead of a POSIX-only premise

Windows CI on #3633 failed F4. The test monkeypatched accessSync to throw and
asserted resolveFallowBinary returned null — but that premise, that the X_OK
check is consulted at all, is POSIX-only by design. requireExecutable is a
deliberate no-op on win32 because Windows mode bits do not mean execute, so the
staged fixture correctly resolved there.

40-design.md's negative-space section already states this carve-out verbatim.
The test contradicted the design it was written from: fixtures were made
platform-adaptive in the previous commit, and this assertion was left
platform-blind.

F4 now asserts BOTH contracts — null on POSIX, resolves on win32 — rather than
skipping either. A t.skip on one lane would have been green and would have left
the win32 carve-out unpinned by fallow's own entry point.

Audited every other row for the same class. F1-F3, F5, F6, F11-F15 hold on both
platforms; F7-F10 and S1-S12 inject platform explicitly and are unaffected. F4
was the only row with a single-platform premise.

The local probe runs on one platform and structurally cannot catch this, which
is why it was green — that limitation is now stated at the top of the probe so a
green probe is not mistaken for platform coverage. The win32 branch was proven
by injecting platform:'win32' with accessSync throwing and asserting it still
resolves.

Refs #3411

---------

Co-authored-by: sim <sim@local>
2026-08-18 15:32:57 -04:00
..

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.