A third registry beside CommandRegistry and HookRegistry, per
docs/config-registry-framing.md. Unblocks the per-buffer auto-pair
toggle, the first of the five backlog items the missing config surface
was gating.
Substrate (src/config_registry.rs):
* ConfigRegistry keyed by name with definition order preserved, R42
mandatory descriptions, R50 typo detection, duplicate rejection,
and SourceLocation provenance -- the command/hook vocabulary.
* Closed scalar kinds: boolean, integer, number, string, enum. Owned
Rust values; Lua tables, functions and userdata are never stored.
Integer exactness is checked by value, never math.type, so the
luajit and lua54 builds agree.
* Two scopes. get(name, buf) resolves buffer-local -> global ->
default; get(name) with no buffer resolves the global chain only
and never consults an ambient buffer. Buffer-locals live in a
registry-owned side table purged at after_buffer_removed, beside
the keymap purge already there.
* An override is ALWAYS stored, even when equal to the value it
shadows; only value_epoch and listener dispatch key on effective
change. Without this a buffer pinned to the current value stores
nothing and a later global set flips it -- the pin silently never
existed. equal_valued_local_override_is_still_stored_and_shields_buffer
fails against the naive reading.
Bindings (src/lua_bindings/config.rs):
* define/get/set/set_local/reset/is_set/describe/list/on_change.
Spec tables are read raw, so neither an unknown key nor a
metatable-provided value can smuggle a field in.
* Listeners commit inside the borrow, snapshot, drop the borrow, and
only then re-enter Lua -- verified by holding the borrow and
watching the test panic with "RefCell already borrowed". A raising
listener is logged without blocking later ones or rolling back, and
a depth bound turns an accidental cycle into a pointed error.
Listeners persist until explicitly disposed; there is no Gc path,
matching the rest of the codebase.
* StartupOnly freezes off the existing InitCompleteFlag at write
time, so this arc adds no editor.rs call at all.
Adopters, each defining its own key so SourceLocation names the owning
module: editing.auto-pair (pair.lua, read per-buffer against the typed
edit's SOURCE buffer), editing.trim-on-save (editops.lua),
autosave.interval-ms (autosave.lua). No public function is removed or
deprecated, and both migration wrappers keep their legacy coercion --
trim_on_save("yes") still enables, interval_ms(1500.7) still floors to
1500 -- coercing before handing the strict registry a conforming value.
M-x describe-setting renders into *help*, modeled on describe-command.
Framing revision 3 records four defects implementation found in the
document itself: acceptance 30 and 31 contradicted each other; the
planned builtin/runtime/config.lua had nothing to hold and would have
broken the source-location contract had it held the one helper it might
have; F5 asked define to police a call it cannot see, moved to
set_local; and list() ordering was underspecified.
No protocol change; SUPPORTED stays [6..18]. No wire surface. Zero
changes to src/editor.rs.
Gates: fmt, clippy -D warnings, --lib (1683), --lib --features crdt
(1857), the new config_registry_acceptance (13) plus auto_pair (45),
editops (72), autosave (29) and m9_6 (25), m4 --skip basedpyright
(114), PMACS_REQUIRE_GPU=1 pmacs-gpu (109), the lua54 backend build,
and the full workspace sweep (2795 tests, exit 0). git diff --check
clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Levi Neuwirth
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