v0.8.0

• httpc (breaking): chttp is renamed httpc. A tool changes its import and calls httpc.New where it called chttp.New; nothing else changes
• httpd: add the package, the HTTP server under a tool's routes: it listens, answers a health check, and on stop lets requests under way finish. mcp/server and prometheus/metrics serve through it, with nothing changed for a tool
• text: add the package, small helpers for wording more than one tool needs: a description's first sentence or first line, and the article a word takes
• mcp/registry: the page size a call asked for, where the next page starts, and how long a call asked to wait, which four MCP servers each kept a copy of
• prometheus/metrics (breaking): pmetrics moves here, beside the other Prometheus pieces. A tool changes its import and calls metrics.New where it called pmetrics.New; nothing else changes
• prometheus/metrics: a tool lists its readings in one place and writes them with the package's writer, in place of its own copy of both. A reading given twice is left off rather than spoiling the page
• prometheus/metrics (fix): a page with one reading that cannot be written is printed without that reading, where it printed nothing at all
• prometheus/metricstest: add the package, the checks a tool's tests make of its metrics page: against a saved copy, against Prometheus's naming rules, and of a running tool's page
• prometheus/poller: add the package. It asks what a tool reports on, on schedules of the tool's own, and keeps the last good answers, so the page is served from memory; one slow or missing target holds up no other. Every tool reads its --intervals setting the same way
• prometheus/exporter: add the package, a tool's print and serve commands in two calls