v0.8.0

Added

• [params.hero] fuseSubtitle, which joins the name and the subtitle into a
  single <h1> — "Robin Vale — Studio" — and drops the .hero__role line under
  it. That pair is not new: head.html has always built it for the <title>
  tag, with the same em dash. What was new was that the page never showed it, so
  a theme whose browser tab read "Robin Vale — Studio" had a heading that read
  only "Robin Vale", and the h1 an answer engine or a search result quotes was
  the half without the role in it. The role line is dropped rather than kept
  beside the fused heading, because it renders that same subtitle and two copies
  of one string is not a layout.

  Only an explicit true turns it on. It reads through params-bool.html, so
  that is the same rule enable follows in sections.html rather than a second
  spelling of it: an absent key is off and a non-boolean warns instead of being
  guessed at. The switch also tests the subtitle before it stands, because the
  failure it can otherwise produce is a heading ending in a dash with nothing
  after it — and an absent subtitle is nil, which printf "%v" renders as the
  string <nil>, so the obvious guard is the one that lets it through. CI
  asserts both directions of the switch, the missing-subtitle case, the explicit
  false, and that a fused headline holds exactly one copy of the subtitle.

  The subtitle itself is guarded now that it reaches the <h1>. It is read in
  three places — the fused heading, the role line and the terminal's data-role
  — from one params-scalar.html call, so a table written there is warned about
  and dropped rather than printing map[a:1] into the element a search result
  quotes and typing it into the terminal besides.

• [params.hero] tagline, one short line under the headline for what a
  visitor should know before scrolling — where you are, what you are open to. It
  works with either headline shape and emits no element at all when unset, so a
  site that does not set it gets no empty <div> where the line would be. It
  goes through params-scalar.html like every other value that reaches the page
  as text: a table written here warns and is dropped instead of aborting a build
  over one short line.

Changed

• [params.hero] intro can now be removed, by writing it as "". It was
  read through default, which fires on an empty string, so an empty intro
  rendered the theme's "hi, my name is" and there was no way to drop the line at
  all. That was survivable while the h1 held a name; it stopped being survivable
  next to a fused headline, where "hi, my name is" introduces a name and a job
  title, which is not what anyone is called. isset separates the two states
  default cannot — absent still gets the theme's string, written-and-empty now
  emits no element rather than an empty one. Same shape latestPosts uses to
  keep a configured 0 from reading as unset. An intro written as a table warns
  and drops the line, the same way params-scalar.html treats every other value
  that reaches the page as text — it does not fall back to the theme's string,
  which is what an absent key means.

Fixed

• A site with no [params.hero] subtitle no longer renders an empty role
  line. .hero__role was emitted unconditionally, so a site that never set a
  subtitle shipped <div class="hero__role">&gt; </div> — an orphan chevron
  under the name, with 18px of margin below it holding space for a line that had
  nothing in it. It was easy to miss while it was one configuration nobody was
  steered toward; fuseSubtitle gave that state a second way in, since a site
  that fuses without a subtitle falls back to exactly this shape, and "the name
  alone" has to mean the name alone. CI pins both routes into it.

• The hero's bio no longer sits flush against a fused headline. .hero h1
  carries 8px of bottom margin, which was only ever half of a gap the .hero__role
  line finished with 18 more. Fused with no tagline under it — the shortest
  configuration the README documents — nothing was left to finish it, and the bio
  landed 8px under a 46px display heading. .hero h1 + .hero__bio restores the
  26px of whitespace both other shapes leave there; the adjacent sibling matches
  only when nothing rendered in between, which is precisely that case.

Full changelog: v0.7.1...v0.8.0