Diagnostics — ROZ code reference

Every diagnostic Rozie emits carries a stable ROZxxx code. The registry spans the whole toolchain: compile-time errors and warnings from the core compiler, build-tool plugin and CLI failures, and runtime warnings from the helper packages. A reported problem shows the code alongside its message; compile-time diagnostics add a source-located code frame (for example ROZ204: …). This page is the lookup table: search for the code you hit in your terminal and land on its severity and cause.

The codes are public API — a code string never renumbers across versions. (The internal member name shown in muted text next to each code may be renamed for clarity, but the ROZxxx string is the contract.)

How to read this page

This entire reference is generated at docs-build time by scanning the compiler's own diagnostic registry (packages/core/src/diagnostics/codes.ts). It can never drift from the compiler — every code the compiler knows about appears below, grouped into the same clusters the source file uses.

• Code — the stable ROZxxx string, with the internal member name in muted text.
• Severity — error halts compilation; warning is advisory; info is a non-actionable FYI. Two status tokens mark codes that never fire: reserved is a code allocated in the registry but not emitted anywhere in the toolchain, and retired is a code that once fired but no longer does (code strings are public API and never renumber, so both stay listed).
• Cause — a one-line summary drawn directly from the registry comment. Where a comment is absent, this is -. Nothing here is invented; the page surfaces only what the source documents.

For the human-readable narrative behind many of these — $model write rules, r-match error boundaries, $classSelector validation, listener-element rules — see Features & design choices.

SFC envelope (Plan 02) — ROZ001..ROZ009

Code	Severity	Cause
ROZ001 MISSING_ROZIE_ENVELOPE	error	the .rozie file has no <rozie> root element wrapping its blocks.
ROZ002 MULTIPLE_ROZIE_ENVELOPES	error	more than one <rozie> root, or a <rozie> nested inside another envelope.
ROZ003 UNKNOWN_TOP_LEVEL_BLOCK	error	a tag at envelope top level is not a recognized block (<props> <data> <script> <listeners> <template> <style> <components>).
ROZ004 DUPLICATE_BLOCK	error	the same block name appears more than once inside one <rozie> (each block is allowed at most once).
ROZ005 PREMATURE_BLOCK_CLOSE	error	literal `</script>` (or other block close sequence) inside the block's own body ended the block early; escape it as `<\/script>`

Block parse — declarative <props>/<data>/<listeners> (Plan 03) — ROZ010..ROZ029

Code	Severity	Cause
ROZ010 INVALID_DECLARATIVE_EXPRESSION	error	a <props>/<data>/<components> body fails to parse as a single JS expression.
ROZ011 NOT_OBJECT_LITERAL	error	a <props>/<data>/<components> body parses but is not an object literal — it lowered to an array or some other expression type.
ROZ012 LISTENER_KEY_NOT_STRING	retired	DORMANT since Phase 19 (was error): a <listeners> object-literal key was not a string; the object-walk that emitted this was replaced by the <listener> element form
ROZ013 LISTENER_VALUE_NOT_OBJECT	retired	DORMANT since Phase 19 (was error): a <listeners> object-literal value was not an object; replaced by the <listener> element form
ROZ014 REQUIRED_PROP_HAS_DEFAULT	warning	A `<props>` entry declared `required: true` also carries a `default:` — the default can never fire (a required prop is always passed), so Rozie drops the default.
ROZ015 LISTENER_ELEMENT_NO_EVENT	error	a <listener> element carries zero @event attributes — it wires nothing; the tag is skipped
ROZ016 LISTENERS_UNEXPECTED_ELEMENT	error	a non-<listener> element appears inside <listeners>; only <listener> elements are allowed (split out of ROZ015, WR-01)
ROZ017 LISTENER_ELEMENT_UNTERMINATED	error	Phase 19 (code-review WR-01): a `<listener>` element is left unterminated — no self-closing `/>` and no closing tag.
ROZ018 INVALID_PROP_DOCS_SHAPE	warning	a <props> `docs:` key is malformed (non-object, wrong-typed description/deprecated/example, or unknown sub-key); the bad docs/sub-key is dropped and no JSDoc is emitted.

Script parse (Plan 03) — ROZ030..ROZ049

Code	Severity	Cause
ROZ030 SCRIPT_PARSE_ERROR	error	recoverable <script> syntax error(s) Babel collected under errorRecovery (one diagnostic per lifted error).
ROZ031 SCRIPT_UNRECOVERABLE	error	the <script> block failed to parse at all (Babel threw); caught and collected, not re-thrown.
ROZ032 SCRIPT_UNRECOGNIZED_LANG	error	<script lang="..."> value unrecognized; only ts/typescript enable the TypeScript parser plugin

Template parse (Plan 03) — ROZ050..ROZ069

Code	Severity	Cause
ROZ050 TEMPLATE_UNCLOSED_ELEMENT	error	a <template> element is left open (a mismatched close tag, or elements still on the stack at input end).
ROZ051 TEMPLATE_MALFORMED_MUSTACHE	error	an unmatched {{ with no closing }} in the same text run.

Modifier grammar (Plan 04) — ROZ070..ROZ079

Code	Severity	Cause
ROZ070 MODIFIER_GRAMMAR_ERROR	error	a malformed @event.modifier(args) chain the modifier grammar could not parse.

Style parse (Plan 03) — ROZ080..ROZ089

Code	Severity	Cause
ROZ080 STYLE_PARSE_ERROR	error	PostCSS threw parsing the <style> body, or an inline :style / style string literal.
ROZ081 STYLE_MIXED_ROOT_SELECTOR	error	a comma-separated selector list mixes :root with other selectors (like ':root, .foo {}'); split the unscoped :root rule from the scoped rules.
ROZ082 STYLE_PORTAL_INVALID_NESTING	error	@portal nested inside @media (or any non-@portal at-rule) — invalid per Spike 004 locked decision #2
ROZ083 STYLE_IMPORTANT_DROPPED_IN_STYLE_OBJECT	warning	Spike 004 (string-form `:style` lowering, quick-task 260520-8iu): a string-literal `:style` carries `!important` AND the target's object-form lowering (React/Solid) silently drops it — per Spike 004 locked decision #7 this is a WARN.
ROZ084 STYLE_PORTAL_SELECTOR_PARSE_ERROR	error	@portal block has empty/malformed prelude or unparseable inner content
ROZ085 STYLE_MISSING_SASS	error	Phase 10: `<style lang="scss">` was used but the optional `sass` (dart-sass) peer dependency is not installed.
ROZ086 STYLE_SCSS_COMPILE_ERROR	error	dart-sass threw on invalid SCSS; the exception is collected (D-08) and parseStyle returns node null
ROZ087 STYLE_UNRECOGNIZED_LANG	error	Phase 10 (D-02): a `<style lang>` value that is neither `scss` nor `css` (nor absent).
ROZ088 STYLE_SCOPED_RULE_TARGETS_PORTAL_CONTENT	warning	Phase 38 (D-01..D-05): a plain SCOPED <style> rule whose subject class/tag is used EXCLUSIVELY inside portal-slot fill content (a `<template #body>` / `#node` / `<slot portal>` fill, incl.

Phase 79 producer-side dynamic slot names (R7/R13) — ROZ090..ROZ095

Code	Severity	Cause
ROZ090 SLOT_NAME_STATIC_AND_BOUND	error	a <slot> carries both a static name= attribute and a bound :name — the two cannot both define the slot's name (R7a)
ROZ091 SLOT_NAME_PARAM_ON_DYNAMIC_SLOT	error	a <slot> with a bound :name also declares a scope param whose key is 'name'; :name is reserved on <slot> as of Phase 79 and can no longer be a scope-param key (R7b)
ROZ092 SLOT_DYNAMIC_NAME_ON_PORTAL	error	a bound :name on a portal slot; portalKey() needs a compile-time string for the $portals.<key> closure key (R7c)
ROZ093 SLOT_FAMILY_PREFIX_DUPLICATE	error	two producer <slot>s derive an identical namePrefix, so a consumer fill matching that prefix has no unique family to resolve to (R7d)
ROZ094 SLOT_DYNAMIC_NAME_NO_PREFIX	warning	a bound :name yields no static leading prefix (bare identifier, call expression, or a template literal with an empty first quasi); legal, but consumer params degrade and no ROZ947 can fire (R7e)
ROZ095 SLOT_RECORD_PROP_NAME_RESERVED	error	a <props> key equals its target's slot-record property name (slots/snippets/templates/rozieSlots); the emitted component would declare the identifier twice (R13)
ROZ096 SLOT_DYNAMIC_NAME_PARSE_ERROR	error	a <slot>'s bound :name value failed to parse as a JavaScript expression; never silently falls back to an `undefined` identifier (T-79-12)

Semantic-binding errors (Phase 2 Plan 02) — ROZ100..ROZ199

Code	Severity	Cause
ROZ100 UNKNOWN_PROPS_REF	error	SEM-01: $props.foo where foo not declared
ROZ101 UNKNOWN_DATA_REF	error	SEM-01: $data.foo where foo not declared
ROZ102 UNKNOWN_REFS_REF	error	SEM-01: $refs.foo where no template ref="foo"
ROZ103 UNKNOWN_SLOTS_REF	error	SEM-01: $slots.foo where no <slot name="foo">
ROZ104 LIFECYCLE_OUTSIDE_SCRIPT	error	$onMount/$onUnmount/$onUpdate called outside <script> block / Program top level
ROZ105 ASYNC_ONMOUNT_RETURN	warning	D-19 edge case: $onMount(async () => …) Promise return cannot be cleanup
ROZ106 COMPUTED_MAGIC_ACCESS	error	$props['foo'] — magic accessors require static keys
ROZ107 CONDITIONAL_CLEANUP_RETURN	warning	$onMount(() => { return condition ? cleanA : cleanB }) — conditional cleanup shape
ROZ108 NON_FUNCTION_CLEANUP_RETURN	warning	$onMount(() => { return nonFnValue }) — return value is not a function
ROZ109 WATCH_INVALID_ARGS	warning	$watch requires (getterFn, callbackFn); skipping malformed call.
ROZ110 UNKNOWN_MODIFIER	error	.escspe (typo) — name not registered in ModifierRegistry
ROZ111 MODIFIER_ARITY_MISMATCH	error	.debounce() (missing required ms arg)
ROZ112 MODIFIER_ARG_SHAPE	error	.outside('not-a-ref') — refExpr expected, got literal
ROZ113 UNKNOWN_MODEL_REF	error	$model.bogus — 'bogus' is not a declared prop
ROZ114 UNSUPPORTED_LISTENER_TARGET	error	Phase 19 (D-04/D-06): a `<listener :target="...">` whose target is neither `window` nor `document` (nor omitted → `$el`).
ROZ115 EXPOSE_ARG_NOT_OBJECT	error	$expose(x) — argument is not an object literal
ROZ116 EXPOSE_SPREAD_PROPERTY	error	$expose({ ...o }) — a property is a spread
ROZ117 EXPOSE_COMPUTED_KEY	error	$expose({ [k]: v }) — a property has a computed key
ROZ118 EXPOSE_VALUE_NOT_FUNCTION	error	$expose({ a: 1 }) / { a: notInScope } / { a: someComputed } — value is not an in-scope <script> function nor an inline arrow/function
ROZ119 EXPOSE_DUPLICATE_CALL	error	two top-level $expose(...) calls — only one is allowed
ROZ120 EXPOSE_NOT_TOP_LEVEL	error	$expose(...) called inside a nested function (not <script> Program top level)
ROZ121 EXPOSE_EVENT_NAME_COLLISION	error	$expose({ open }) where 'open' is an emitted event, or (on class-based targets) a same-named declared prop — field/method name clash
ROZ122 EMIT_EMPTY_EVENT_NAME	error	$emit('') / $emit(' ') — empty/whitespace-only string-literal event name
ROZ123 REFS_READ_BEFORE_MOUNT	error	$refs.x read in a $computed body / $watch getter / template binding|interpolation|r-if|r-show|r-for-iterable — evaluated before mount
ROZ124 EXPOSE_CVA_NAME_COLLISION	error	$expose({ writeValue }) (or registerOnChange/registerOnTouched/setDisabledState) on a single-model CVA-receiving Angular component — collides with the auto-emitted ControlValueAccessor method
ROZ125 CVA_MULTI_MODEL_NO_ACCESSOR	info	≥2 model:true props — no single-control ControlValueAccessor auto-emitted on the Angular target
ROZ126 CVA_NO_DISABLED_PROP	info	single-model CVA component with no `disabled` prop — setDisabledState is a no-op on the Angular target
ROZ127 SLOT_PROP_NAME_COLLISION	error	<slot name="X"> where X equals a declared <props> key; Svelte 5 collapses snippets+props into one namespace, so the names cannot coexist
ROZ128 STYLE_GLOBAL_PSEUDO_FORBIDDEN	error	:global(...) used in <style>; works only on Vue/Svelte, silently dead on React/Solid/Lit.
ROZ129 INVALID_PROVIDE_KEY	error	$provide(key, …) key is not a string literal.
ROZ130 INVALID_INJECT_KEY	error	$inject(key, …) key is not a string literal.
ROZ131 PROVIDE_NOT_STATEMENT	error	$provide(...) used in expression position (must be a top-level statement).
ROZ132 INJECT_UNBOUND	error	$inject(...) not bound to a `const x = $inject(...)`.
ROZ133 PROVIDE_MISSING_VALUE	error	$provide(key) called with no value (or a non-expression second argument); $provide(key, value) requires a value.
ROZ134 INJECT_MIXED_DECLARATION	error	$inject(...) shares a `const` declaration with other declarators; it must be the sole declarator (const x = $inject('k')).
ROZ135 STRUCTURED_CLONE_REACTIVE	warning	structuredClone($props/$data/$model.x) throws on Vue reactive()/Svelte $state proxies; use $clone(x).
ROZ136 CLONE_BAD_ARITY	error	$clone(value) requires exactly one non-spread argument; the per-target lowering cannot interpret any other arity.
ROZ137 EXPOSE_RESERVED_MEMBER	warning	an $expose verb shadows an inherited Object.prototype member (Angular+Lit) or HTMLElement/Element/Node member (Lit); suffix-rename it (e.g.
ROZ138 REACT_STALE_READ	warning	read of $data/$model/$props.x dominated by an earlier write to the same key in one function body; React setState is async so the read binds the pre-write value.
ROZ139 PARTIAL_INLINE_COLLISION	error	an inlined .rzts/.rzjs declaration name collides with a host binding or an already-inlined partial name; rename one.
ROZ140 PARTIAL_INLINE_CYCLE	error	a .rzts/.rzjs script partial (transitively) imports itself; the cycle is broken and reported instead of overflowing the stack.
ROZ141 PARTIAL_UNSUPPORTED_IMPORT_FORM	error	a .rzts/.rzjs partial imported via a default or namespace import; only named imports have an inlinable surface.
ROZ142 PUBLIC_CONTRACT_NAME_COLLISION	error	a public-contract identifier (prop/slot/emit/$expose verb/provide-inject key) collides with a per-target reserved name; it cannot be auto-renamed.
ROZ143 EVENT_HANDLER_NOT_EXPRESSION	error	a template @event handler's text failed to parse as a single expression (dominant cause: a statement-body handler, e.g.
ROZ145 EMIT_MULTIPLE_POSITIONAL_ARGS	error	a `$emit` call with 2+ positional payload args.
ROZ146 MEMO_MISUSE	error	`$memo(...)` was not a well-formed top-level `const X = $memo(fnArrow, keyFnArrow)` call (exactly two arrow-function args).
ROZ147 LIT_INHERITED_PROPERTY_PROP_NAME	warning	(suppressible) — a <props> key collides with an inherited HTMLElement/Element/Node PROPERTY name that becomes a Lit class field, shadowing the base-class property.
ROZ148 PROP_EMIT_CALLBACK_NAME_COLLISION	error	a <props> key equal to the on<Pascal> callback field React/Solid synthesize for a declared emit; both fields land on one props interface with different types (TS2300).

Compile-time correctness errors (Phase 2 Plan 02) — ROZ200..ROZ299

Code	Severity	Cause
ROZ200 WRITE_TO_NON_MODEL_PROP	error	SEM-02: $props.foo = … where foo lacks model: true (Phase 2 success criterion 2)
ROZ201 WRITE_TO_REF	error	$refs.foo = … (refs are read-only DOM-element wrappers)
ROZ202 RESERVED_IDENTIFIER_COLLISION	error	<data> field or r-for loop var named $el / $props / $data / $refs / $slots / $emit / $event / $attrs / $listeners / $restoreFocus / $model / $expose / $provide / $inject / $clone / $slotted.
ROZ203 UPDATE_EXPRESSION_VALUE_CONSUMED	error	expression-context ++/-- on reactive state isn't lowerable
ROZ204 WRITE_TO_MODEL_PROP_VIA_PROPS	error	$props.<modelProp> = … ; use $model.<x>
ROZ205 MODEL_ACCESS_NON_MODEL_PROP	error	$model.<nonModelProp>
ROZ206 LISTENER_ELEMENT_MISPLACED	error	Phase 19 (D-08): a `<listener>` element placed inside `<template>` instead of the `<listeners>` block.
ROZ207 DATA_NESTED_MUTATION_NOT_REACTIVE	error	an in-place mutation of nested `$data` (member/index write, or a mutating array/Map/Set method).
ROZ208 DATA_INIT_SIGIL_NOT_LOWERED	error	a `$refs`/`$slots` member access inside a `<data>` initializer.
ROZ209 EMIT_NAME_INVALID_IDENTIFIER	error	an `$emit` event name that is not `/^[a-zA-Z][a-zA-Z0-9_-]*$/` (e.g.
ROZ210 RESERVED_SLOT_NAME	error	<slot name="default"> collides with the unnamed-slot sentinel key the emitters use; rename the slot or drop the name attribute

Warnings (Phase 2 Plan 02) — ROZ300..ROZ399

Code	Severity	Cause
ROZ300 RFOR_MISSING_KEY	warning	SEM-03: r-for without :key
ROZ301 RFOR_KEY_IS_LOOP_VARIABLE	warning	SEM-03: :key="index" / :key="item" (loop var)
ROZ302 RFOR_KEY_IS_NON_PRIMITIVE	warning	:key="someObj" (Pitfall 6 secondary case)
ROZ303 RIF_ACCESSIBILITY_PLACEHOLDER	reserved	not emitted in Phase 2 (deferred per A7)
ROZ304 TEMPLATE_FOR_EMPTY_BODY	warning	`<template r-for>` with no children (empty loop body; produces no output, and broke React/Solid emit before the guard)

@rozie/unplugin configuration errors (Phase 3 D-52) — ROZ400..ROZ419

Code	Severity	Cause
ROZ400 UNPLUGIN_TARGET_REQUIRED	error	D-49: target option missing
ROZ401 UNPLUGIN_TARGET_UNKNOWN	error	target value not in 'vue'|'react'|'svelte'|'angular'
ROZ402 UNPLUGIN_TARGET_NOT_YET_SUPPORTED	error	Phase 3 only ships 'vue'; react/svelte/angular ROZ402 until later phases
ROZ403 UNPLUGIN_PEER_DEP_MISSING	reserved	never emitted; allocated for: @rozie/runtime-vue or @vitejs/plugin-vue not resolvable (Pitfall 8)
ROZ404 UNPLUGIN_PLUGIN_CHAIN_MISORDER	reserved	never emitted; allocated for: detected vite-plugin-vue lacking; D-25 chain broken
ROZ405 UNPLUGIN_ANGULAR_OPTIONS_INVALID	error	Phase 23 — malformed `angular` config shape (e.g.

@rozie/target-vue lowering errors (Phase 3 D-52) — ROZ420..ROZ449

Code	Severity	Cause
ROZ420 TARGET_VUE_RESERVED	error	internal-invariant placeholder; the Vue emitter reports this only on internal-invariant violation
ROZ421 TARGET_VUE_RHTML_WITH_CHILDREN	error	r-html via v-html cannot coexist with children; mirrors ROZ620/721

@rozie/unplugin Solid-branch + @rozie/target-solid errors (Phase 06.3 — D-140 amended) — ROZ810..ROZ812

Code	Severity	Cause
ROZ810 UNPLUGIN_SOLID_PEER_DEP_MISSING	error	vite-plugin-solid not resolvable from cwd (D-139)
ROZ811 UNPLUGIN_SOLID_DEP_MISSING	error	solid-js (^1.8) not resolvable from cwd (D-139)

@rozie/runtime-solid warnings (Phase 06.3) — ROZ812

Code	Severity	Cause
ROZ812 RUNTIME_SOLID_CONTROLLABLE_MODE_FLIP	warning	D-135 — createControllableSignal detected parent flipping controlled/uncontrolled mid-lifecycle

@rozie/target-solid lowering errors (Phase 07.1) — ROZ813..ROZ819

Code	Severity	Cause
ROZ813 TARGET_SOLID_RESERVED	error	internal-invariant placeholder; the Solid emitter raises this when a modifier has no solid() hook (a few reuse sites — r-html-with-children, the $el-listener fallback — emit at warning severity)

@rozie/unplugin React-branch configuration errors (Phase 4 D-63) — ROZ500..ROZ519

Code	Severity	Cause
ROZ500 UNPLUGIN_REACT_PEER_DEP_MISSING	error	D-59: neither @vitejs/plugin-react nor @vitejs/plugin-react-swc installed (Pitfall 9)
ROZ501 UNPLUGIN_REACT_DEP_MISSING	error	react peer dep not resolvable
ROZ502 UNPLUGIN_REACT_PLUGIN_CHAIN_MISORDER	error	detected plugin-react/swc lacking; D-58 chain broken (no enforce: 'pre' on @rozie/unplugin)

@rozie/target-react lowering errors (Phase 4 D-63) — ROZ520..ROZ549

Code	Severity	Cause
ROZ520 TARGET_REACT_RHTML_WITH_CHILDREN	warning	r-html with children — React's dangerouslySetInnerHTML can't coexist with children, children dropped (Pitfall 10); NOTE: also reused by React emit-path internal-invariant/modifier failures at error severity
ROZ521 TARGET_REACT_NESTED_STATE_MUTATION	warning	Pitfall 7 — $data.foo.bar = 'x' nested member writes; v1 warns + leaves AST unchanged
ROZ522 TARGET_REACT_MODULE_LET_AUTO_HOISTED	info	Pitfall 3/8 — module-scoped `let X` referenced from LifecycleHook setup auto-hoisted to useRef
ROZ523 TARGET_REACT_MODULE_LET_UNHOISTABLE	error	Pitfall 3/8 — module-scoped `let X` referenced too indirectly to safely auto-hoist; user must refactor
ROZ524 TARGET_REACT_SETTER_NAME_COLLISION	error	Phase 07.7 — user-defined function `set<X>` collides with auto-generated useState/useControllableState setter `setX` for state/model prop X; emits "already declared" + infinite recursion when `$data.X = v` rewrites to `setX(v)` inside the same-named user wrapper

@rozie/runtime-react warnings (Phase 4 D-63) — ROZ550..ROZ579

Code	Severity	Cause
ROZ550 RUNTIME_REACT_CONTROLLABLE_MODE_FLIP	warning	D-57 — useControllableState detected parent flipping controlled/uncontrolled mid-lifecycle

@rozie/unplugin Svelte-branch + @rozie/target-svelte errors (Phase 5) — ROZ600..ROZ649

Code	Severity	Cause
ROZ600 UNPLUGIN_SVELTE_PEER_DEP_MISSING	error	@sveltejs/vite-plugin-svelte not resolvable from cwd
ROZ601 UNPLUGIN_SVELTE_DEP_MISSING	error	svelte itself (^5) not resolvable from cwd
ROZ602 UNPLUGIN_SVELTE_PLUGIN_CHAIN_MISORDER	reserved	enforce:'pre' guarantees this; placeholder for future
ROZ620 TARGET_SVELTE_RHTML_WITH_CHILDREN	error	r-html with children; mirrors Vue/React Pitfall 10
ROZ621 TARGET_SVELTE_RESERVED	error	internal-invariant placeholder; mirrors TARGET_VUE_RESERVED (one reuse site — the $el-listener fallback — emits at warning severity)

@rozie/unplugin Angular-branch + @rozie/target-angular errors (Phase 5 D-72) — ROZ700..ROZ749

Code	Severity	Cause
ROZ700 UNPLUGIN_ANGULAR_PEER_DEP_MISSING	error	@analogjs/vite-plugin-angular not resolvable from cwd (D-72)
ROZ701 UNPLUGIN_ANGULAR_DEP_MISSING	error	@angular/core (^17) not resolvable
ROZ702 UNPLUGIN_ANGULAR_VITE_VERSION_TOO_LOW	error	analogjs requires Vite ^6 (RESEARCH OQ6)
ROZ703 UNPLUGIN_ANGULAR_PLUGIN_CHAIN_MISORDER	reserved	never emitted; enforce:'pre' guarantees this
ROZ720 TARGET_ANGULAR_RFOR_MISSING_KEY	error	Angular @for REQUIRES track expression (Pitfall 3); upgrades the ROZ300 r-for-missing-:key warning to an error on the Angular target
ROZ721 TARGET_ANGULAR_RHTML_WITH_CHILDREN	error	r-html via [innerHTML] cannot coexist with children
ROZ722 TARGET_ANGULAR_RESERVED	error	internal-invariant placeholder (one reuse site — the $el-listener fallback — emits at warning severity)
ROZ723 TARGET_ANGULAR_LOOP_GUARD_HOIST	error	an early-return event modifier (.self / key-filter) inside an r-for loop references the loop variable — Angular hoists the guard to a class-field arrow that cannot capture loop-scoped bindings
ROZ724 TARGET_ANGULAR_DUPLICATE_STATIC_SLOT_KEY	error	two static-literal slot fills on one producer tag resolve to the same key (Phase 80 D-08; Angular-emitter-local, not a core IR validation — the object/snippet fill shape used by React/Solid/Svelte/Vue/Lit makes this construct legal and unimplicated on those targets)

@rozie/runtime-angular warnings (Phase 80, opening the band reserved by Phase 5) — ROZ750..ROZ799

Code	Severity	Cause
ROZ750 RUNTIME_ANGULAR_DUPLICATE_SLOT_KEY_WARNING	warning	ngDevMode-guarded dev-mode runtime duplicate keyed-fill collision; last fill (in content-query/document order) wins (Phase 80 D-08)

Phase 6 (ROZ800..ROZ899) — D-96 sub-ranges

Code	Severity	Cause
ROZ800 COMPILE_INVALID_TARGET	error	unknown target token in opts.target
ROZ801 COMPILE_INVALID_OPT_COMBO	reserved	disallowed opts combination

@rozie/babel-plugin (Plan 06-04) — ROZ820..ROZ829

Code	Severity	Cause
ROZ820 BABEL_PLUGIN_INVALID_TARGET	error	missing or invalid `target` option (vue|react|svelte|angular required)
ROZ821 BABEL_PLUGIN_NO_FILENAME	error	cannot resolve relative .rozie path without state.filename / file.opts.filename
ROZ822 BABEL_PLUGIN_COMPILE_ERROR	error	compile() returned severity:'error' diagnostics during sibling write
ROZ823 BABEL_PLUGIN_SIBLING_WRITE_FAIL	error	fs writeFileSync failed when emitting sibling .{ext}/.d.ts/.module.css/.global.css

@rozie/unplugin Lit-branch + @rozie/target-lit + @rozie/runtime-lit (Phase 06.4 — D-LIT-19 Option A) — ROZ830..ROZ849

Code	Severity	Cause
ROZ830 UNPLUGIN_LIT_PEER_DEP_MISSING	error	lit (^3.2) not resolvable from cwd
ROZ831 UNPLUGIN_LIT_SIGNALS_PEER_DEP_MISSING	error	@lit-labs/preact-signals (^1) not resolvable from cwd

@rozie/target-lit lowering errors (Phase 07.1) — ROZ832..ROZ839

Code	Severity	Cause
ROZ832 TARGET_LIT_RESERVED	error	internal-invariant placeholder; the Lit emitter raises this when a modifier has no lit() hook (one reuse site emits at warning severity)
ROZ833 TARGET_LIT_RHTML_WITH_CHILDREN	error	r-html via unsafeHTML cannot coexist with children; mirrors ROZ620/721
ROZ840 RUNTIME_LIT_CONTROLLABLE_MODE_FLIP	warning	createLitControllableProperty parent-flip warning (D-LIT-10)

@rozie/cli argv parsing + filesystem errors (Plan 06-03) — ROZ850..ROZ879

Code	Severity	Cause
ROZ850 CLI_INVALID_TARGET	error	unknown --target token (commander InvalidArgumentError)
ROZ851 CLI_MISSING_INPUT	error	no .rozie files matched after expandInputs
ROZ852 CLI_OUT_REQUIRED	error	--out required for multiple inputs or multiple targets
ROZ853 CLI_NULL_BYTE_INPUT	error	null-byte injection in input arg (carries forward unplugin/transform.ts:235-237)
ROZ854 CLI_NON_ROZIE_INPUT	error	file input that doesn't end with .rozie
ROZ855 CLI_REACT_REQUIRES_OUT_DIR	error	target=react with no --out — sidecars (.d.ts/.module.css/.global.css) cannot stream to stdout

Phase 06.1 source-map composition (D-111) — ROZ900..ROZ919

Code	Severity	Cause
ROZ900 SOURCEMAP_COMPOSE_FAILED	reserved	never emitted; allocated for: composeMaps() threw or returned null
ROZ901 SOURCEMAP_CHILD_MAP_MALFORMED	reserved	never emitted; allocated for: child map missing required Source Map v3 fields
ROZ902 SOURCEMAP_OFFSET_OUT_OF_RANGE	reserved	never emitted; allocated for: ChildMap.outputOffset exceeds shellMs output length
ROZ903 SOURCEMAP_REMAPPING_THREW	reserved	never emitted; allocated for: @ampproject/remapping internal error
ROZ910 SOURCEMAP_AST_NODE_MISSING_LOC	reserved	never emitted; allocated for: synthesized AST node lacks loc; falls back to nearest segment (D-104/D-106)
ROZ911 SOURCEMAP_PARSER_OFFSET_INVALID	reserved	never emitted; allocated for: @babel/parser startLine/startColumn validation failed

Phase 06.2 component composition (D-123 sub-allocation) — ROZ920..ROZ939

Code	Severity	Cause
ROZ920 UNKNOWN_COMPONENT	error	PascalCase tag matches neither outer name nor <components> entry
ROZ921 NON_ROZIE_IMPORT_PATH	error	<components> entry value is not a `.rozie` string literal
ROZ922 LOWERCASE_LIKELY_TYPO	warning	<counter> when Counter is declared
ROZ923 DUPLICATE_COMPONENT_IMPORT_PATH	warning	two <components> entries point at the same .rozie path
ROZ924 UNUSED_COMPONENT_ENTRY	warning	declared <components> entry never used in template
ROZ925 ESCAPE_HATCH_REACT_SUSPENSE	error	<Suspense> — use React directly
ROZ926 ESCAPE_HATCH_VUE_TELEPORT	error	<Teleport> — use Vue directly
ROZ927 ESCAPE_HATCH_NG_CONTAINER	error	<ng-container> — use Angular directly
ROZ928 ESCAPE_HATCH_SVELTE_FRAGMENT	error	<svelte:fragment> — use Svelte directly

Phase 07.2 consumer-side slot fills (D-08 sub-allocation) — ROZ940..ROZ959

Code	Severity	Cause
ROZ940 DUPLICATE_DEFAULT_FILL	error	locked in SPEC.md R3; loose children + explicit <template #default>
ROZ941 UNKNOWN_SLOT_NAME	warning	consumer fills a slot the producer doesn't declare (typo catch)
ROZ942 DUPLICATE_NAMED_FILL	error	two sibling <template #header> directives
ROZ943 REPROJECTION_UNDECLARED_WRAPPER_SLOT	error	wrapper forwards a slot it doesn't itself declare
ROZ944 REPROJECTION_UNDECLARED_INNER_SLOT	warning	wrapper forwards into a slot the inner producer doesn't declare
ROZ945 CROSS_PACKAGE_LOOKUP_FAILED	error	npm/relative resolution of a <components> importPath returns null
ROZ946 DYNAMIC_NAME_EXPRESSION_INVALID	error	`<template #[expr]>` bracketed text fails to parse as a JS expression
ROZ947 SCOPED_PARAM_MISMATCH	error	D-09 — consumer destructures a param the producer SlotDecl.params doesn't declare
ROZ948 SCOPED_PARAMS_ALL_DROPPED	warning	scoped-params destructure had properties but none resolved to simple bindings (e.g.

Phase 07.3 consumer-side two-way binding — ROZ949..ROZ951

Code	Severity	Cause
ROZ949 TWO_WAY_PROP_NOT_MODEL	error	r-model:prop= where producer prop lacks model:true (dual-frame: consumer site + producer decl)
ROZ950 TWO_WAY_ARG_OR_TARGET_INVALID	error	r-model: with empty arg (`r-model:=`), OR applied to non-component HTML tag (`<div r-model:foo=`)
ROZ951 TWO_WAY_LHS_NOT_WRITABLE	error	RHS not a writable lvalue per 07.3-CONTEXT D-03 permissive rule (literal/ternary/call/$computed)
ROZ952 TWO_WAY_DIRECTIVE_TYPO	error	colon-form directive `r-<base>:<arg>` whose `<base>` is a Levenshtein near-miss of `model` (e.g.

Phase 11 r-match construct — ROZ953..ROZ959

Code	Severity	Cause
ROZ953 MATCH_EMPTY_DISCRIMINANT	error	r-match host with no value (`<template r-match>` / `<template r-match="">`)
ROZ954 MATCH_STRAY_CHILD	error	r-match host child that is neither r-case nor r-default
ROZ955 MATCH_CASE_NO_VALUE	error	valueless r-case (hint: did you mean r-default?)
ROZ956 MATCH_CASE_WITH_FOR	error	r-case + r-for on the same element
ROZ957 MATCH_DEFAULT_NOT_LAST	error	r-default is not the last branch of the match
ROZ958 MATCH_MULTIPLE_DEFAULT	error	more than one r-default in a single r-match
ROZ959 MATCH_DUPLICATE_CASE	warning	duplicate literal r-case value (first occurrence wins, like `switch`)

Phase 12 r-model modifiers — ROZ960..ROZ964

Code	Severity	Cause
ROZ960 RMODEL_UNKNOWN_MODIFIER	error	unknown r-model modifier (did-you-mean among model modifiers)
ROZ961 RMODEL_EVENT_MODIFIER_MISUSED	error	a valid event modifier used on r-model
ROZ962 DIRECTIVE_TAKES_NO_MODIFIERS	error	modifier on r-if/r-for/r-show/r-html/r-text
ROZ963 RMODEL_BUILTIN_ON_TWO_WAY	error	built-in r-model modifier on consumer-side r-model:propName
ROZ964 RMODEL_MODIFIER_NOT_APPLICABLE	warning	value-transform modifier on a checkbox/radio r-model

Phase 13 $classSelector — ROZ965..ROZ967

Code	Severity	Cause
ROZ965 CLASS_SELECTOR_ARG_NOT_LITERAL	error	R3: $classSelector argument is not a string literal
ROZ966 CLASS_SELECTOR_UNKNOWN_CLASS	error	R4: class not declared in the component's <style> scope; did-you-mean hint
ROZ967 CLASS_SELECTOR_INVALID_TOKEN	error	R5: multi-token / dotted / combinator / `#` argument (fails the bare-class-token regex)
ROZ968 CLASS_SELECTOR_REACT_NO_SOURCE	retired	(Phase 25) — formerly fired when $classSelector was used in a React emit without opts.source.

Phase 14 attribute fallthrough — ROZ969..ROZ971

Code	Severity	Cause
ROZ969 R_BIND_COLON_FORM	error	R1: `r-bind:foo="x"` colon form is not supported (use the `:foo` shorthand or the bare-spread `r-bind="obj"`)
ROZ970 ATTR_FALLTHROUGH_MULTI_ROOT	error	R8: a multi-root template with auto-fallthrough enabled has no single root to receive inherited attributes
ROZ971 ATTR_DOUBLE_APPLY	warning	R9: `$attrs` referenced (e.g.

Phase 15 listener fallthrough — ROZ972..ROZ974

Code	Severity	Cause
ROZ972 R_ON_COLON_FORM	error	R1: `r-on:click="x"` colon form is not supported (use the single-event `@click` syntax or the bare object-spread `r-on="{ click: fn }"`)
ROZ973 LISTENER_FALLTHROUGH_MULTI_ROOT	error	R8: a multi-root template with auto-listener-fallthrough enabled has no single root to receive inherited listeners (INDEPENDENT of ROZ970)
ROZ974 LISTENER_DOUBLE_APPLY	warning	R9: `$listeners` referenced (e.g.

Phase 16 $restoreFocus — ROZ975..ROZ976

Code	Severity	Cause
ROZ975 RESTORE_FOCUS_NON_LITERAL_SELECTOR	error	SPEC R9: $restoreFocus first arg is not a string literal
ROZ976 RESTORE_FOCUS_BAD_ARITY	error	SPEC R9: $restoreFocus called with wrong number of arguments

compile() empty-code guard — ROZ977

Code	Severity	Cause
ROZ977 COMPILE_EMPTY_CODE_NO_DIAGNOSTICS	error	internal: compile() emit produced empty code with no error diagnostics (parser/lowerer/emitter internal failure)

Phase 26 bare-sigil rejection — ROZ978

Code	Severity	Cause
ROZ978 BARE_OBJECT_SIGIL	error	bare $props/$data/$refs/$slots used as a whole-object value (not a member access).

Phase 37 $portals.default — ROZ979

Code	Severity	Cause
ROZ979 DEFAULT_PORTAL_NAME_RESERVED	error	a default portal slot (`<slot portal />`) and a slot `name="default"` both key `$portals.default`; "default" is the reserved default-portal key.
ROZ981 RUNTIME_ONLY_NAME_COLLISION	error	a runtime-only public-contract collision with no typecheck net (Svelte slot-param shadows an r-for loop var, or two emits normalize to one callback prop).

Phase 71 r-keynav — ROZ982..ROZ987

Code	Severity	Cause
ROZ982 KEYNAV_UNKNOWN_MODIFIER	error	unknown r-keynav modifier (did-you-mean among .vertical/.horizontal/.both/.loop/.typeahead/.skipdisabled/.grid)
ROZ983 KEYNAV_NO_ITEMS	error	r-keynav root has no associated r-keynav-item in the component
ROZ984 KEYNAV_ORPHAN_ITEM	error	r-keynav-item with no enclosing r-keynav root (ancestor-containment wording, reworded Phase 77 — see ROZ996)
ROZ985 KEYNAV_BAD_FOCUS_MODEL	error	missing/unrecognized r-keynav focus-model argument (valid: tabindex, activedescendant)
ROZ986 KEYNAV_MULTIPLE_ROOTS	retired	was: more than one r-keynav root in one component (v1 = one group per component); superseded by containment-scoped multi-group + ROZ996 (Phase 77)
ROZ987 KEYNAV_SOURCE_UNRESOLVED	error	r-keynav :source neither provided nor synthesizable from a co-located r-for

Phase 75 published-primitive manifest — ROZ988..ROZ989

Code	Severity	Cause
ROZ988 MANIFEST_SCHEMA_VERSION_MISMATCH	error	installed primitive manifest schemaVersion incompatible with the compiler's MANIFEST_SCHEMA_VERSION (D-04)
ROZ989 MALFORMED_MANIFEST	error	manifest JSON is not an object, or is missing/mistyped a required field (props/slots/emits/expose/schemaVersion)

command-palette-portal-overlay phase — r-portal element directive — ROZ990..ROZ992

Code	Severity	Cause
ROZ990 PORTAL_DIRECTIVE_ON_SLOT	error	`r-portal="expr"` used on a <slot> element; redirect to the boolean `portal` attribute (slot-content portalling is a distinct, orthogonal primitive)
ROZ991 PORTAL_DIRECTIVE_ON_COMPONENT	error	`r-portal` used on a <components>-registered child component element; v1 only supports plain/host elements
ROZ992 PORTAL_DIRECTIVE_EMPTY_VALUE	error	`r-portal` with an empty/missing value; a portal needs a container expression

Phase 77 r-keynav grid focus-model + multi-group — ROZ993..ROZ996

Code	Severity	Cause
ROZ993 KEYNAV_GRID_ORIENTATION_CONFLICT	error	`.grid()` combined with `.vertical`/`.horizontal`/`.both` (grid owns both axes)
ROZ994 KEYNAV_GRID_LOOP_CONFLICT	error	`.grid()` combined with `.loop` (boundary/@keynav-page events replace wrapping)
ROZ995 KEYNAV_GRID_BAD_COLUMNS	error	`.grid` missing its argument, or the argument fails to parse as an expression (non-number literal, ref handle, or unparsable $-path)
ROZ996 KEYNAV_NESTED_ROOTS	error	an r-keynav root found inside another r-keynav root's subtree; roots must be siblings/cousins, never ancestors of one another

quick 260812-i67 cross-target event-name contract — ROZ997..ROZ998

Code	Severity	Cause
ROZ997 EMIT_NAME_CANONICAL_COLLISION	error	a component declares two $emit names that collapse to the same canonical key by kebab/camel/snake equivalence (e.g.
ROZ998 UNMATCHED_COMPONENT_LISTENER	warning	a component-tag listener names an event the RESOLVED callee does not declare (neither exact nor canonical) and that is not a native DOM event or a Rozie-synthetic runtime event; the hint carries a did-you-mean suggestion plus the callee's declared emit list.