Define domain display-label constraints

Clarify that review domains may contain internal whitespace, punctuation, case-sensitive text, and non-ASCII characters. Require consumers to preserve and safely encode the complete label instead of relying on lossy slugs, matching the replacement BC-ALAgents consumer.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 77d0a40e-8bf5-40ac-a450-40eb0255db03

agent-consumption.md

@@ -84,7 +84,7 @@ BCQuality is an **additive** knowledge layer. The agent surfaces two kinds of fi
 
 Before a skill emits an agent finding, it validates the candidate against the BCQuality knowledge already loaded for the task: a matching file upgrades the candidate to a knowledge-backed finding (and merges or deduplicates against relevant existing output); a contradicting file suppresses the candidate. Only candidates with no BCQuality coverage become agent findings.
 
-Orchestrators SHOULD render a non-empty `domain` value verbatim and MUST tolerate its absence for reports from older producers. They MAY render knowledge-backed and agent findings differently and MAY apply independent severity floors; `references: []` and the `agent:` id prefix distinguish agent findings, while `from-sub-skill: "agent"` identifies those emitted by the super-skill itself.
+Orchestrators MUST tolerate an absent `domain` in reports from older producers. When it is present, treat it as display text rather than an identifier: preserve the full string and its case, whitespace, punctuation, and non-ASCII characters, escaping only for the target rendering format. Do not tokenize it on spaces or use a lowercased or slugified form as the sole metadata or deduplication key, because distinct labels can collapse to the same slug. Retain the exact string, use a lossless encoding, or use a collision-resistant digest instead. Orchestrators MAY render knowledge-backed and agent findings differently and MAY apply independent severity floors; `references: []` and the `agent:` id prefix distinguish agent findings, while `from-sub-skill: "agent"` identifies those emitted by the super-skill itself.
 
 ## Why this architecture
 

skills/do.md

@@ -190,7 +190,9 @@ The first reference is the **primary** reference: the knowledge file the finding
 
 **`findings[].from-sub-skill`** — optional. Set only by super-skills. The `skill.id` of the sub-skill that produced the finding, or the literal string `"agent"` for an agent finding the super-skill produced from its own cross-cutting reasoning. Absent on findings emitted directly by a leaf skill — including agent findings the leaf emits within its own domain, which appear in the leaf's own report without this field.
 
-**`findings[].domain`** — optional in the shared schema for backward compatibility and for non-review findings. It is a short, human-readable display label for the review domain that produced the finding (for example, `Security`, `Performance`, `Accessibility`). A review leaf skill MUST set it on every finding it emits. A review super-skill MUST preserve it verbatim when rolling a leaf finding into its top-level `findings[]`, including preserving its absence from older producers, and MUST set it to `"Agent"` for agent findings it emits about cross-cutting concerns. Consumers SHOULD render a non-empty value verbatim and MUST tolerate its absence.
+**`findings[].domain`** — optional in the shared schema for backward compatibility and for non-review findings. It is a short, human-readable display label for the review domain that produced the finding (for example, `Security`, `Breaking Changes`, `API & Web Services`). A review leaf skill MUST set it on every finding it emits. The value MUST be a non-empty, single-line string with no leading or trailing whitespace or control characters. Internal whitespace, punctuation, case, and non-ASCII characters are valid and significant.
+
+A review super-skill MUST preserve `domain` verbatim when rolling a leaf finding into its top-level `findings[]`, including preserving its absence from older producers, and MUST set it to `"Agent"` for agent findings it emits about cross-cutting concerns. Consumers MUST tolerate its absence. When rendering a present value, consumers MUST preserve the complete display text, escaping only as required by the output format; they MUST NOT split it on whitespace or restrict it to identifier characters. `domain` is display text, not a stable machine identifier. If a consumer embeds it in metadata or uses it in a deduplication key, it MUST retain the exact string, use a lossless encoding, or use a collision-resistant digest; it MUST NOT rely on lowercasing or lossy slugification as the sole identity.
 
 **`findings[].suggested-code`** — optional in the schema but **expected for mechanical findings**. It is a concrete code-replacement payload for the lines indicated by `location`. When present, the string MUST be a literal replacement for the source lines covered by `location.line` (or `location.range` if set) — i.e., what the file would contain after the fix, with no surrounding diff markers, fences, or commentary. Consumers MAY render it as a one-click suggestion in the delivery surface (for example, a GitHub ```` ```suggestion ```` block).
 
@@ -291,4 +293,3 @@ Conforms to the DO output contract.
 ## How orchestrators consume output
 
 An orchestrator invokes an action skill with an input appropriate to the skill's declared `inputs`, receives the JSON output, and maps findings to its delivery surface (PR comments, build gates, IDE diagnostics). The orchestrator MUST NOT interpret skill-specific fields beyond the schema above. Skills that need richer semantics MUST encode them within the schema (for example, by adding structured `message` text) rather than extending the output shape.
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