PLAN.md gains a "Phase 3 as built" section covering the decisions the plan had
left open, and §2.2, §2.2.1 and §7.0 are brought in line with what shipped:
* The engine is fully native. §2.2.1 wrote rung 1 as "apply verbatim with
git apply", but §1 chose the release tarball so there would be no git on the
shard host, and rung 2 needs a native applier anyway. Rung 1 keeps its
stronger verdict and shares rung 2's write path. On the real files this is
not academic — the shipped patches are CRLF and two of their three targets
are LF, so git apply refuses patches the installer places correctly.
* §7.0 documents `patch_tier` in the overlay manifest. Which patches form one
unit, which companion follows which, whether a core rebuild is needed and
what declining costs are not derivable from a diff, so the release declares
them and adding a patch regenerates metadata rather than an installer.
* §2.2 gains the pre-image cache and the widened patch cache, and §2.2.1 gains
the second, per-feature level of the all-or-nothing rule.
INSTALL.md's illustrated tier output is replaced with the real thing, the
status banner now says `install` is complete, §3's path tables list
patches/originals/, and Appendix A2 names the line-ending trap that makes
git apply refuse a patch whose region is visibly untouched.
Refs: RunicGateway/installer#6, RunicGateway/servuo-plugins#10
Co-Authored-By: Claude <noreply@anthropic.com>
