Write and edit in GOV.UK / GDS house style — plain English, active voice, front-loaded content, sentence case, and no bold or italics for emphasis. Use when writing or editing reports, research write-ups, guidance, documentation, summaries, or any prose where clarity and accessibility matter.
Commit Jujutsu working-copy changes, push an existing Jujutsu bookmark, or commit and push when explicitly requested. Use when the user asks to "jj commit", "commit with jj", "jj push", "push with jj", "jj commit and push", or wants a fast Jujutsu commit/push workflow.
Add release-please automation to a repository that uses GitHub Actions for releases or package publishing. Use when Codex needs to inspect an existing repo, install a release-please workflow, add the required manifest/config files, preserve any existing publish workflow, add a Release flow section to CONTRIBUTING.md explaining how releases work, and then tell the user which GitHub secrets and settings to add manually after the code changes are complete.
Manages Jujutsu workspaces for isolated task execution, rebases, conflict resolution, and cleanup. Use when the user asks to create or switch workspaces, isolate dirty working copies, rebase onto main or another revision, resolve jj workspace conflicts, or clean up temporary workspaces.
Extract Mermaid diagrams from Markdown documents or raw Mermaid files and render them to PNG or SVG. Use when a task involves fenced ```mermaid blocks, Mermaid architecture diagrams in docs, or reliable image export where browser and Mermaid CLI configuration can be fragile.