diff --git a/scanner/github.ts b/scanner/github.ts
index 68622f0..f9e65f6 100644
--- a/scanner/github.ts
+++ b/scanner/github.ts
@@ -329,6 +329,7 @@ export async function fetchAllComments(needAllComments: IssueOrPr[], needEarlyCo
 }
 
 const Repository = z.object({
+  nameWithOwner: z.string(),
   labels: z.object({
     totalCount: z.number(),
     nodes: z.array(z.object({
@@ -346,6 +347,7 @@ export async function getRepo(org, repo): Promise<Repository> {
   const result = RepositoryQueryResult.parse(await octokit.graphql(
     gql(`query ($owner: String!, $repoName: String!) {
       repository(owner: $owner, name: $repoName) {
+        nameWithOwner
         labels(first: 100, query: "Priority") {
           totalCount
           nodes {
diff --git a/scanner/main.ts b/scanner/main.ts
index 56d99bd..51fb550 100644
--- a/scanner/main.ts
+++ b/scanner/main.ts
@@ -59,7 +59,7 @@ async function analyzeRepo(org: string, repoName: string, globalStats: GlobalSta
         author: issue.author?.login,
         createdAt: issue.createdAt,
         sloTimeUsed: Temporal.Duration.from({ seconds: 0 }),
-        whichSlo: whichSlo(issue),
+        whichSlo: whichSlo(repo.nameWithOwner, issue),
         onAgendaFor: countAgendaTime(issue, now),
         labels: issue.labels.nodes.map(label => label.name),
         stats: {
diff --git a/scanner/per-repo.ts b/scanner/per-repo.ts
new file mode 100644
index 0000000..eba9780
--- /dev/null
+++ b/scanner/per-repo.ts
@@ -0,0 +1,18 @@
+import { IssueOrPr } from "./github.js";
+
+const triagePredicates: Record<`${string}/${string}`, (issue: Pick<IssueOrPr, 'labels'>) => boolean> = {
+    'w3c/csswg-drafts': function (issue: Pick<IssueOrPr, 'labels'>) {
+        return issue.labels.nodes.length > 0;
+    },
+};
+
+// True if this repository has configured a custom function to say whether an issue is triaged
+// without an SLO, instead of the common `Priority: Eventually` label.
+export function hasTriagePredicate(repoNameWithOwner: string) {
+    return repoNameWithOwner in triagePredicates;
+}
+
+// True if this issue should be considered triaged without an SLO.
+export function isTriaged(repoNameWithOwner: string, issue: Pick<IssueOrPr, 'labels'>): boolean {
+    return triagePredicates[repoNameWithOwner]?.(issue);
+}
diff --git a/scanner/slo.ts b/scanner/slo.ts
index b62df26..a426f50 100644
--- a/scanner/slo.ts
+++ b/scanner/slo.ts
@@ -2,6 +2,7 @@ import { Temporal } from "@js-temporal/polyfill";
 import { SloType } from '@lib/repo-summaries.js';
 import assert from "node:assert";
 import type { IssueOrPr, Repository } from "./github.js";
+import { hasTriagePredicate, isTriaged } from "./per-repo.js";
 
 const PRIORITY_URGENT = "priority: urgent";
 const PRIORITY_SOON = "priority: soon";
@@ -12,19 +13,21 @@ export function NeedsReporterFeedback(label: string) {
   return label.toLowerCase() === NEEDS_REPORTER_FEEDBACK;
 }
 
-/** Returns whether `repo` has enough labels to mark bugs as triaged.
+/** Returns whether `repo` has enough labels or configuration to mark bugs as triaged.
  *
  * Because different repositories will adopt different subsets of the labels this tool recognizes,
  * we should only look for the smallest subset that indicates the repo isn't relying on the triage
  * heuristics. For now, that's just the `Priority: Eventually` label.
+ *
+ * It's also possible to define a custom isTriaged predicate for each repository.
  */
-export function hasLabels(repo: Pick<Repository, 'labels'>): boolean {
-  return repo.labels.nodes.some(labelNode => labelNode.name === PRIORITY_EVENTUALLY);
+export function hasLabels(repo: Pick<Repository, 'nameWithOwner' | 'labels'>): boolean {
+  return hasTriagePredicate(repo.nameWithOwner) || repo.labels.nodes.some(labelNode => labelNode.name === PRIORITY_EVENTUALLY);
 }
 
-export function whichSlo(issue: Pick<IssueOrPr, 'labels' | 'isDraft'>): SloType {
+export function whichSlo(repoNameWithOwner: string, issue: Pick<IssueOrPr, 'labels' | 'isDraft'>): SloType {
   const labels: string[] = issue.labels.nodes.map(label => label.name.toLowerCase());
-  if (issue.isDraft || labels.includes(PRIORITY_EVENTUALLY) || labels.includes(NEEDS_REPORTER_FEEDBACK)) {
+  if (issue.isDraft || labels.includes(NEEDS_REPORTER_FEEDBACK)) {
     return "none";
   }
   if (labels.includes(PRIORITY_URGENT)) {
@@ -33,6 +36,9 @@ export function whichSlo(issue: Pick<IssueOrPr, 'labels' | 'isDraft'>): SloType
   if (labels.includes(PRIORITY_SOON)) {
     return "soon";
   }
+  if (labels.includes(PRIORITY_EVENTUALLY) || isTriaged(repoNameWithOwner, issue)) {
+    return "none";
+  }
   return "triage";
 }