HTML

Recipe

1. Resolve ARTIFACT_DIR inside the provided HTML state root, or expanded ~/.html otherwise: revise a named artifact in place, or create a three-random-word lowercase slug for new work.
2. Write only ARTIFACT_DIR/index.html as a complete self-contained, source-faithful, responsive interface with semantic structure and accessible controls unless the user names another entry file.
3. Start a long-lived static server for ARTIFACT_DIR on 127.0.0.1 using a free non-common port.
4. Verify the exact http://127.0.0.1:<PORT>/index.html with files inside the task run, retrying from step 3 on another port if binding or fetching fails, and keep the verified server alive through handoff.
5. Reply with exactly HTML file: <absolute entry-file path> then HTML: [Open locally](<verified /index.html URL>); if serving cannot be verified, omit the link and give the path plus one concise reason.

Details

• Run python3 -m http.server "$PORT" --bind 127.0.0.1 --directory "$ARTIFACT_DIR" as the foreground command of a long-running tool session; do not background or detach it from a shell that will exit.