v0.21.0

Dev builds, so a fix is tried on a real project before it ships, and the gate
fixes that trial on jig-site turned up.

Added

• Dev builds. A version carrying -dev (0.21.0-dev.1) is a local build
  of a fix, tried on a real project before it is released. npm has no such
  version, so its skill, its commands and its Stop hook run the jig on PATH
  rather than npx jig-ui@<version>; a hook that could not run would let every
  agent stop unchecked. scripts/pack-dev.mjs packs one. Installing a release
  afterwards puts the npx hook back in place of the dev one.

Fixed

• The Stop hook refreshes only the probes it judges. It re-rendered every
  critiqued page on every stop, so a link added to jig-site's header left sixty
  probe files changed on pages no one was working on, and three sessions
  committed them. A page's probes are refreshed when its own critique or tweak
  runs.
• A mockup is checked before it goes to the owner. The pause for approval
  skipped the drawing check, so on jig-site two mockup sessions put a drawing
  the check refused to the owner, reported the gate's blocks as "waiting on
  owner review", and the owner approved a drawing the gate then refused make
  for.
• A region label may say its name with spaces. "on this page" now labels the
  spec's on-this-page; hyphens, underscores and spaces compare as one.
• A comment after a size is a comment. phone: # judged at 360px over a
  full composition was refused as a one-line size.
• A critique's report names every finding its verdict files hold. jig-site's
  Guide critique held seven and listed six; make reads the report. Checked
  where the project keeps a REPORT.md beside the verdicts.
• A session cannot change Jig's mode file. A jig-site make round narrowed
  --size-rail in mode.editorial.css to make three columns fit; update
  owns that file, and a project's own values go in its brand file or stylesheet.
• A decide amendment answers for its own reason. Like a tweak's, only the
  **Why…:** paragraphs it adds must quote the owner; three jig-site amendments
  had to relabel an earlier round's reason before the gate let them stop.
• A finding is fixed only where the source it cited changed. verdicts
  told jig-site's fourth home critique that seven findings were fixed; four had
  flipped because its readers read the same unchanged lines differently. A
  finding judged ok is now fixed when a line it cited (file:line) changed, or
  its file when it cited no line, or any source when it cited nothing. The rest
  are reported as judged ok though the lines they cited did not change: a
  different reading, or a fix made where the finding did not point.
• The gate asks for the verdict lock to be committed. It writes
  verdicts.lock when a critique or tweak stops, after the agent has committed,
  so every such session on jig-site left it behind. When the verdicts are
  committed and the lock is not, it stops the session once to commit it.
• A tweak's decision quotes the owner's recorded words. A jig-site tweak
  shown a screenshot wrote an exception to E-51 "given directly by the owner
  … by reference rather than words". A tweak's new **Why:** now meets
  decide's rule (the owner's words in quotation marks, not given, or
  **Why (inferred):**), and its quotations must be in tweak.json's change.
  A reason decide wrote earlier is not the tweak's to answer for.
• spec, mockup and critique write under .jig/ only. On jig-site a
  critique swapped the rule its page demonstrates to get past a block, then
  re-judged the page it had changed, and a mockup session wrote the site's
  stylesheet. The gate stops either.
• An approved drawing changed afterwards goes back to pending. The session
  that recorded a jig-site approval then redrew frames and moved a switch.
• Quoted tool output is not the page's copy. The probe's em-dash scan skips
  <pre>, <code>, <samp> and <kbd>, as it skips quotations: jig-site's
  home page quotes jig check's real output, whose wording has one. Probe
  version 9.
• A drawing's size frames are the class frame, not any class containing
  it. jig-site's home drawing captioned its rule specimens spec-frame, and
  the gate split every size frame at each one and reported regions missing.