fix: bump pymdown-extensions for pygments 2.20.0 compat

[eric-tramel]

Summary

Fix to regain capability to run make serve-docs-locally.

• Pygments 2.20.0 (released 2026-03-29, security fix) introduced stricter handling of filename=None in HtmlFormatter, causing mkdocs build to crash on code reference pages (e.g., code_reference/analysis.md).
• pymdown-extensions 10.21.2 (also released 2026-03-29) fixes the incompatibility by coercing None to "" before passing to pygments.
• The lockfile previously pinned pymdown-extensions at 10.21. Since it is a transitive dependency (from mkdocs-material and mkdocstrings), this PR adds an explicit "pymdown-extensions>=10.21.2" lower-bound constraint to the docs dependency group to ensure the fix is always resolved.

[greptile-apps]

Greptile Summary

This PR is a targeted dependency maintenance fix: it adds an explicit pymdown-extensions>=10.21.2,<11 lower-bound to the docs dependency group in pyproject.toml and updates the lockfile accordingly, bumping the resolved version from 10.21 → 10.21.2.

• The motivation is sound: pygments 2.20.0 introduced stricter filename handling in HtmlFormatter, causing mkdocs build to crash. pymdown-extensions 10.21.2 fixes this by coercing None to "" before the call.
• Because pymdown-extensions was previously only a transitive dependency (pulled in by mkdocs-material and mkdocstrings), pinning it explicitly in the docs group is the correct approach to guarantee the floor version.
• The version range >=10.21.2,<11 follows the same major-version-capped pattern used for all other docs dependencies in this file.
• The lockfile update is consistent: revision bumped, docs group entries updated, and the new PyPI wheel/sdist URLs with correct SHA256 hashes are recorded.

Confidence Score: 5/5

Safe to merge — a well-scoped dependency bump with no logic changes and a consistent lockfile update.

No code logic changes; only a dependency version floor is raised from 10.21 to 10.21.2 and the lockfile is updated accordingly. The constraint follows established conventions in the file, the upper bound is properly set, and the PR description clearly justifies the change.

No files require special attention.

Important Files Changed

Filename	Overview
pyproject.toml	Adds explicit pymdown-extensions>=10.21.2,<11 lower-bound to the docs dependency group to ensure the pygments 2.20.0 compatibility fix is resolved; version range is well-bounded.
uv.lock	Lockfile updated consistently: revision bumped 2→3, pymdown-extensions added to docs group entries, version pinned to 10.21.2 with correct PyPI URLs and SHA256 hashes.

Sequence Diagram

sequenceDiagram
    participant uv as uv resolve
    participant pyproject as pyproject.toml
    participant mkdocs_material as mkdocs-material
    participant pymdown as pymdown-extensions
    participant pygments as pygments 2.20.0

    uv->>pyproject: read docs dependency group
    pyproject-->>uv: pymdown-extensions>=10.21.2,<11 (explicit)
    uv->>mkdocs_material: resolve transitive deps
    mkdocs_material-->>pymdown: requires pymdown-extensions
    uv->>pymdown: satisfies >=10.21.2 → resolves 10.21.2
    pymdown->>pygments: calls HtmlFormatter with filename=""
    pygments-->>pymdown: renders syntax-highlighted code blocks
    pymdown-->>mkdocs_material: markdown extensions processed
    Note over pymdown,pygments: 10.21.2 coerces None to "" before passing to pygments, fixing the crash

Loading

_{Reviews (4): Last reviewed commit: "Merge branch 'main' into fix/bump-pymdow..." | Re-trigger Greptile}