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2026-05-01feat(core): reject root composer.json that requires its own namensfisis
Mirrors Composer\Package\Loader\RootPackageLoader::load(): if the root package's "name" appears as a key in its own "require" or "require-dev" map, fail loudly before reaching the resolver. Without this, Mozart would silently let the request hit Packagist (which has no entry for the root's vendor/name) and report a misleading "could not be found" error. Wired into install::execute (when a lock file is present) and update::execute (the no-lock fallback path). Carries the same wording as Composer's RuntimeException so a future EXPECT-OUTPUT comparison will match. Also extends the installer test harness: when a fixture sets EXPECT-EXCEPTION but no EXPECT-EXIT-CODE, assert that Mozart exits non-zero. Full exception-class matching remains a follow-up (see .ken/test_design.md §7.2). Closes the gap exercised by the install-self-from-root installer fixture. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01feat(install): verify platform requirements before install_from_locknsfisis
Mirrors Composer's platform-requirements check during Installer::doInstall(): merge platform requires from the lock's platform/platform-dev fields with the root composer.json require/require-dev (composer.json wins on duplicate keys), then verify them against the detected runtime platform. If any are missing or unsatisfied, print the standard "Your lock file does not contain a compatible set of packages" message followed by Problem 1..N entries and exit with DEPENDENCY_RESOLUTION_FAILED (2) instead of silently proceeding to "Nothing to install" with exit 0. Closes the gap exercised by the outdated-lock-file-with-new-platform-reqs-fails installer fixture. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01feat(install): verify lock file satisfies composer.json requiresnsfisis
Mirrors Composer's Installer::doInstall() check: before installing from an existing composer.lock, walk every root require (and require-dev in dev mode) and confirm the lock contains a satisfying package. If any are missing or fail the constraint, print the standard bullet-list diagnostic and exit with LOCK_FILE_INVALID (4) instead of blindly attempting to install and failing later with a misleading "no dist or source information" error. Closes the gap exercised by the outdated-lock-file-fails-install installer fixture. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01feat(registry): accept v1 (bare array) installed.jsonnsfisis
Composer's FilesystemRepository::initialize branches on isset($data['packages']) — object form is v2, bare array is v1 — and treats dev-package-names/dev as optional. Mirror that in InstalledPackages::read so Mozart consumes shared .test fixtures (which use v1) without harness preprocessing, and so installs over v1-era vendor directories keep working. Drop the v1→v2 wrapper that was added to mozart-test-harness for the same reason. Removes #[ignore] from update_to_empty_from_locked (2/187 green). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01fix(core): default missing composer.json "name" to __root__nsfisis
Composer's RootPackageLoader assigns the root name "__root__" when composer.json omits the "name" field. Mozart was failing deserialization in that case, blocking any installer fixture with a nameless root manifest. Apply the same serde default and unignore update-to-empty-from-blank as the first green entry on the .test scoreboard.
2026-05-01test(test-harness): enumerate Composer installer .test fixturesnsfisis
Add per-fixture #[test] entries (187 total) via a small declarative macro that reads files directly from the composer submodule. For now each test only asserts the file parses; execution and EXPECT-* checks will be layered on as the harness gains comparison helpers.
2026-02-22fix(test): correct install command expectation when no lock file presentnsfisis
The install command succeeds with a warning when no lock file exists, rather than failing with a suggestion to run update.
2026-02-21test(cli): add end-to-end integration tests for CLI commandsnsfisis
Add 23 integration tests using assert_cmd and predicates covering about, validate, show, licenses, install, config, init, and dump-autoload commands with shared test helpers and fixture projects. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>