fix(bin): restore prototype's deleted anti-patterns and two routing triggers

ADR-0020's stated anti-goal is satisfying the size gate by deleting content rather
than relocating it. prototype's logic.md lost three anti-patterns, including
"Don't generalise" — the one with a distinct failure mode, a throwaway growing
abstractions for hypothetical futures, and the one the logic branch is most exposed
to. It survived nowhere in the repo.

The deletion bought nothing measurable: references/ sits outside the body FAIL,
outside the 600-word suggestion and outside the Vale gate, and prototype's body is
483 words. 4011d14 restored the byte-identical defect in the sibling ui.md with
exactly that reasoning in its message and left this file alone. Restored verbatim
from main.

improve-codebase-architecture had dropped "refactoring" from its description
entirely, so "find refactoring opportunities in this repo" had no lexical match,
while spending characters on a boundary against tdd — which cannot plausibly steal
an architecture request. retrofit.md names that exact failure: an invented boundary
costs characters and buys no routing accuracy.

write-docs had dropped all four literal trigger phrasings, leaving them only in the
body and a `when:` field, neither visible to the router at routing time. Its
boundary also sent PRDs to grill-with-docs, which has no PRD flow, and the body
repeated that at two more places. Per #123 nothing in the corpus produces a PRD, so
no target was invented — the boundary is now honest about the ADR case only.

Two READMEs added by this branch contradicted the SKILL.md they document: triage's
label resolution, and grill-with-docs' fifth during-session behaviour. Unconditional
reference pointers in tdd and improve-codebase-architecture are now conditional; the
files stay at the skill root, which is #122's scope.

Refs: #114, #122, #123
ADR: 0020

plugins/bin/skills/improve-codebase-architecture/SKILL.md

@@ -1,10 +1,11 @@
 ---
 name: improve-codebase-architecture
 description: >
-  Use when the user wants a codebase's architecture improved — deepening
-  opportunities that turn shallow modules into deep ones, informed by
-  `CONTEXT.md` and `docs/adr/`. Not debugging a failure -> `diagnose`. Not
-  test-first feature work -> `tdd`.
+  Use when the user wants to improve architecture, find refactoring
+  opportunities, consolidate tightly-coupled modules, or make a codebase more
+  testable and AI-navigable — deepening opportunities that turn shallow modules
+  into deep ones, informed by `CONTEXT.md` and `docs/adr/`. Not debugging a
+  failure -> `diagnose`.
 ---
 
 # Improve Codebase Architecture
@@ -13,7 +14,7 @@ Surface architectural friction and propose **deepening opportunities** — refac
 
 ## Glossary
 
-Use these terms exactly in every suggestion. Consistent language is the point — don't drift into "component," "service," "API," or "boundary." Full definitions in [LANGUAGE.md](LANGUAGE.md).
+Use these terms exactly in every suggestion. Consistent language is the point — don't drift into "component," "service," "API," or "boundary."
 
 - **Module** — anything with an interface and an implementation (function, class, package, slice).
 - **Interface** — everything a caller must know to use the module: types, invariants, error modes, ordering, config. Not just the type signature.
@@ -24,12 +25,14 @@ Use these terms exactly in every suggestion. Consistent language is the point
 - **Leverage** — what callers get from depth.
 - **Locality** — what maintainers get from depth: change, bugs, knowledge concentrated in one place.
 
-Key principles (see [LANGUAGE.md](LANGUAGE.md) for the full list):
+Key principles:
 
 - **Deletion test**: imagine deleting the module. If complexity vanishes, it was a pass-through. If complexity reappears across N callers, it was earning its keep.
 - **The interface is the test surface.**
 - **One adapter = hypothetical seam. Two adapters = real seam.**
 
+If a term or principle above is ambiguous in the case in front of you, or you need the definitions and the principles the two lists leave out, read `LANGUAGE.md`.
+
 This skill is _informed_ by the project's domain model. The domain language gives names to good seams; ADRs record decisions the skill should not re-litigate.
 
 ## Process
@@ -57,7 +60,7 @@ Present a numbered list of deepening opportunities. For each candidate:
 - **Solution** — plain English description of what would change
 - **Benefits** — explained in terms of locality and leverage, and also in how tests would improve
 
-**Use CONTEXT.md vocabulary for the domain, and [LANGUAGE.md](LANGUAGE.md) vocabulary for the architecture.** If `CONTEXT.md` defines "Order," talk about "the Order intake module" — not "the FooBarHandler," and not "the Order service."
+**Use CONTEXT.md vocabulary for the domain, and the architecture glossary above for the architecture.** If `CONTEXT.md` defines "Order," talk about "the Order intake module" — not "the FooBarHandler," and not "the Order service."
 
 **ADR conflicts**: if a candidate contradicts an existing ADR, only surface it when the friction is real enough to warrant revisiting the ADR. Mark it clearly (e.g. _"contradicts ADR-0007 — but worth reopening because…"_). Don't list every theoretical refactor an ADR forbids.
 
@@ -72,4 +75,4 @@ Side effects happen inline as decisions crystallize:
 - **Naming a deepened module after a concept not in `CONTEXT.md`?** Add the term to `CONTEXT.md` — same discipline as `grill-with-docs`, in the format `grill-with-docs`'s `CONTEXT-FORMAT.md` defines. Create the file lazily if it doesn't exist.
 - **Sharpening a fuzzy term during the conversation?** Update `CONTEXT.md` right there.
 - **User rejects the candidate with a load-bearing reason?** Offer an ADR, framed as: _"Want me to record this as an ADR so future architecture reviews don't re-suggest it?"_ Only offer when the reason would actually be needed by a future explorer to avoid re-suggesting the same thing — skip ephemeral reasons ("not worth it right now") and self-evident ones. See `grill-with-docs`'s `ADR-FORMAT.md`.
-- **Want to explore alternative interfaces for the deepened module?** See [INTERFACE-DESIGN.md](INTERFACE-DESIGN.md).
+- **Want to explore alternative interfaces for the deepened module?** Read `INTERFACE-DESIGN.md`.