This PR removes the unnecessary check for the batteries
`nightly-testing-YYYY-MM-DD` tag that blocks mathlib CI from running.
## Problem
Currently, when fixing mathlib's nightly-testing branch, the workflow
requires BOTH batteries and mathlib to have `nightly-testing-YYYY-MM-DD`
tags before mathlib CI can run on lean4 PRs. This creates a false
dependency:
1. Fix mathlib nightly-testing (including fixing batteries build)
2. Mathlib CI succeeds → creates mathlib tag → advances
`nightly-with-mathlib`
3. But batteries test suite fails → no batteries tag created
4. lean4 PR can't run mathlib CI because batteries tag doesn't exist
5. Bot suggests rebasing onto `nightly-with-mathlib`, but this doesn't
help
## Solution
Remove the batteries tag check because:
- Mathlib CI already depends on batteries (builds it as a dependency)
- If batteries is broken, mathlib CI will detect it
- The batteries testing branch creation already has fallback logic
(falls back to `nightly-testing` branch if tag doesn't exist)
This allows mathlib CI to run as soon as mathlib is ready, which is the
actual blocker.
See discussion at
https://leanprover.zulipchat.com/#narrow/channel/428973-nightly-testing/topic/Mathlib.20status.20updates/near/564136025🤖 Prepared with Claude Code
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
This PR adds a CI step that fails if the `src/stdlib_flags.h` file was
modified, to alert PR authors that they most likely wanted to modify
`stage0/src/stdlib_flags.h` instead.
Given its run time of >2hrs, the job is added as a secondary job for
nightly releases and a primary job for full releases. A new check level
for differentiating between nightlies and full releases is added for
this.
(Trying to) reactivate lsan will happen in a follow-up PR.
This PR updates the `pr-title` CI check to enforce that the commit
message does not start with a capital letter followed by a non-capital
letter.
This should ensure that messages do not start with a capitalized word,
but allow messages that start with an acronym.
This PR invalidates the CI cache for the Linux Lake build job by bumping
the version of the CI cache key.
The CI cache is broken due to a change in the output format in build
traces. This will be fixed in #10586, but this should prevent further
breakages of PRs in the meantime.
Bumps
[actions/download-artifact](https://github.com/actions/download-artifact)
from 4 to 5.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/actions/download-artifact/releases">actions/download-artifact's
releases</a>.</em></p>
<blockquote>
<h2>v5.0.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Update README.md by <a
href="https://github.com/nebuk89"><code>@nebuk89</code></a> in <a
href="https://redirect.github.com/actions/download-artifact/pull/407">actions/download-artifact#407</a></li>
<li>BREAKING fix: inconsistent path behavior for single artifact
downloads by ID by <a
href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a
href="https://redirect.github.com/actions/download-artifact/pull/416">actions/download-artifact#416</a></li>
</ul>
<h2>v5.0.0</h2>
<h3>🚨 Breaking Change</h3>
<p>This release fixes an inconsistency in path behavior for single
artifact downloads by ID. <strong>If you're downloading single artifacts
by ID, the output path may change.</strong></p>
<h4>What Changed</h4>
<p>Previously, <strong>single artifact downloads</strong> behaved
differently depending on how you specified the artifact:</p>
<ul>
<li><strong>By name</strong>: <code>name: my-artifact</code> → extracted
to <code>path/</code> (direct)</li>
<li><strong>By ID</strong>: <code>artifact-ids: 12345</code> → extracted
to <code>path/my-artifact/</code> (nested)</li>
</ul>
<p>Now both methods are consistent:</p>
<ul>
<li><strong>By name</strong>: <code>name: my-artifact</code> → extracted
to <code>path/</code> (unchanged)</li>
<li><strong>By ID</strong>: <code>artifact-ids: 12345</code> → extracted
to <code>path/</code> (fixed - now direct)</li>
</ul>
<h4>Migration Guide</h4>
<h5>✅ No Action Needed If:</h5>
<ul>
<li>You download artifacts by <strong>name</strong></li>
<li>You download <strong>multiple</strong> artifacts by ID</li>
<li>You already use <code>merge-multiple: true</code> as a
workaround</li>
</ul>
<h5>⚠️ Action Required If:</h5>
<p>You download <strong>single artifacts by ID</strong> and your
workflows expect the nested directory structure.</p>
<p><strong>Before v5 (nested structure):</strong></p>
<pre lang="yaml"><code>- uses: actions/download-artifact@v4
with:
artifact-ids: 12345
path: dist
# Files were in: dist/my-artifact/
</code></pre>
<blockquote>
<p>Where <code>my-artifact</code> is the name of the artifact you
previously uploaded</p>
</blockquote>
<p><strong>To maintain old behavior (if needed):</strong></p>
<pre lang="yaml"><code></tr></table>
</code></pre>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="634f93cb29"><code>634f93c</code></a>
Merge pull request <a
href="https://redirect.github.com/actions/download-artifact/issues/416">#416</a>
from actions/single-artifact-id-download-path</li>
<li><a
href="b19ff43027"><code>b19ff43</code></a>
refactor: resolve download path correctly in artifact download tests
(mainly ...</li>
<li><a
href="e262cbee4a"><code>e262cbe</code></a>
bundle dist</li>
<li><a
href="bff23f9308"><code>bff23f9</code></a>
update docs</li>
<li><a
href="fff8c148a8"><code>fff8c14</code></a>
fix download path logic when downloading a single artifact by id</li>
<li><a
href="448e3f862a"><code>448e3f8</code></a>
Merge pull request <a
href="https://redirect.github.com/actions/download-artifact/issues/407">#407</a>
from actions/nebuk89-patch-1</li>
<li><a
href="47225c44b3"><code>47225c4</code></a>
Update README.md</li>
<li>See full diff in <a
href="https://github.com/actions/download-artifact/compare/v4...v5">compare
view</a></li>
</ul>
</details>
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this PR reorders the `DiscrTree.Key` constructors to match the order
given in the manually written `DiscrTree.Key.ctorIdx`. This allows us to
use the auto-generated one, and moreover lets this code benefit from
special compiler support for `.ctorIdx`, once that lands.
