design(decisions): mono type signal — icon + label, accent bar removed (1a)

Commit 2/6 of the Quiet Ledger series (Concept A, anatomy 1a).

- AttentionQueueRow: delete the left tone accent bar; source icon now
  renders in text-muted-foreground (inherited from the label span).
  Type identity reads through icon shape + text label alone.
- lib/attention: delete attentionTone/attentionToneStyle/TONE_STYLE —
  repo-wide grep found exactly one consumer (this row), so the five-tone
  sky/violet/rose/amber/neutral map goes rather than lingering unused.
- Tone unit tests deleted with the map they asserted (5 tests); the
  sourceMeta label/icon coverage still pins type identity per kind.
- DECISION-SHEET entry records the delete-vs-scope judgment call.

Verified: token gates 3/3 CLEAN, typecheck green, ui vitest 2532/2532.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

doc/design/DECISION-SHEET.md

@@ -39,6 +39,10 @@ Every open question from TOKEN-AUDIT.md §8 + batch logs and COMPONENT-INVENTORY
 | C10 | FeatureGate wrapper pattern (3 near-identical gates) | Nice-to-have shared primitive; backlog, not a run | APPROVED — backlog nice-to-have, not a run |
 | C11 | Sidebar agents section: hand-rolled rows (own spacing/icon colors, palette-blue liveness dot) instead of `SidebarNavItem`; only section that is collapsible | Run 3 item: unify rows onto `SidebarNavItem`, settle collapsibility policy across sections, liveness dot → canonical status blue. Wholesale shadcn Sidebar adoption REJECTED for now (app already has equivalent machinery incl. icon-rail height trick; highest-regression chrome) — re-evaluate as a dedicated item after Run 3 only if its behaviors (kbd shortcut, persisted state, mobile sheet) are wanted | DONE (Run 3, Jul 7) — agent rows render via `SidebarNavItem` (new additive props: `iconNode`, `active`, `dense`, `trailing`, `liveAccessory`); all live dots (agents + nav rows, rail + expanded) now use `--status-agent-running` (#2563eb, was palette blue-500 #3b82f6 — small hue-darkening delta, per-C11 mandate; "N live" text keeps its palette classes for Run 4). **Collapsibility policy** (superseded Jul 8 by user review): EVERY labeled section (Work, Company, Projects, Agents) is collapsible, default-open, session-scoped state — one affordance everywhere. "See all agents" stays a plain muted Link on purpose (must not adopt active-route highlighting). 48 sidebar vitest assertions pass unchanged. |
 
+## Decisions-page type signal → mono icon + label, accent bar removed (PAP-315 / PAP-313 anatomy 1a, Jul 14 2026)
+
+The five-tone type→color system (sky/violet/rose/amber/neutral accent bar + tinted source icon) is retired from the Decisions feed: the left accent bar is deleted and the source icon renders in `text-muted-foreground`, so a row's type reads through icon shape + text label alone and color is freed up for severity (Critical `destructive`, per 2a) and CTAs. Judgment call in the same commit: `attentionTone`/`attentionToneStyle`/`TONE_STYLE` (lib/attention.ts) were deleted rather than kept as an unused map — a repo-wide grep found exactly one consumer (AttentionQueueRow itself), so no other surface loses the palette and no debt remains; the tone unit tests went with them (type identity is still covered by the `sourceMeta` label/icon tests).
+
 ## Decisions-page severity badges → outline, red = Critical only (PAP-314 / PAP-313 anatomy 2a, Jul 14 2026)
 
 Severity on the Decisions feed now renders as an *outline* badge — Critical on the `destructive` tokens (`border-destructive/60 text-destructive`; manual AA check: 4.76:1 light / 4.69:1 dark vs `--card`, WCAG 2.1 small-text pass with no dark override), High as a neutral outline (`border-border text-muted-foreground`), Medium/Low no badge (unchanged). Red is reserved for Critical alone so it reads as an alarm, not decoration. Judgment call in the same commit: the exported `severityStyle`/`SEVERITY_STYLE` map (filled red/orange/yellow/blue accents + dots) was deleted rather than retokenized — it had zero component consumers (only its own unit test) and its filled-accent model is exactly what the plan retires; severity keys a badge, never card color (invariant test preserved).

ui/src/components/AttentionQueueRow.tsx

@@ -21,7 +21,6 @@ import {
   attentionDetailImages,
   attentionDetailLine,
   attentionImageUrl,
-  attentionToneStyle,
   isInlineResolvable,
   severityBadge,
   sourceMeta,
@@ -107,7 +106,6 @@ export const AttentionQueueRow = memo(function AttentionQueueRow({
   selected = false,
 }: AttentionQueueRowProps) {
   const meta = sourceMeta(item.sourceKind);
-  const tone = attentionToneStyle(item);
   const sevBadge = severityBadge(item.severity);
   const Icon = meta.icon;
   const isHidden = variant === "hidden";
@@ -161,9 +159,6 @@ export const AttentionQueueRow = memo(function AttentionQueueRow({
       data-attention-source={item.sourceKind}
       data-attention-severity={item.severity}
     >
-      {/* Type accent bar (canonical color map — never severity). */}
-      <span className={cn("absolute inset-y-0 left-0 w-1", tone.accent)} aria-hidden />
-
       <div className="flex items-start gap-2 py-3 pl-4 pr-3">
         {/* Expand affordance / spacer gutter — keeps headlines aligned across the list. */}
         {expandable ? (
@@ -188,7 +183,7 @@ export const AttentionQueueRow = memo(function AttentionQueueRow({
           <div className="flex items-start justify-between gap-2">
             <div className="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1">
               <span className="inline-flex items-center gap-1 text-xs font-medium text-muted-foreground">
-                <Icon className={cn("h-3.5 w-3.5", tone.icon)} />
+                <Icon className="h-3.5 w-3.5" />
                 {meta.label}
               </span>
               {sevBadge && (

ui/src/lib/attention.test.ts

@@ -6,8 +6,6 @@ import {
   attentionBadgeCount,
   attentionDateBucket,
   attentionDetailLine,
-  attentionTone,
-  attentionToneStyle,
   buildAttentionFilterOptions,
   countActiveAttentionFilters,
   defaultAttentionFilterState,
@@ -131,57 +129,6 @@ describe("sourceMeta", () => {
 
 });
 
-describe("attentionTone + attentionToneStyle (canonical color map §4)", () => {
-  it("colors plan approvals violet regardless of source kind", () => {
-    const fromApproval = buildItem({
-      sourceKind: "approval",
-      detail: { kind: "plan_approval", issueTitle: "I", planTitle: "P", summaryExcerpt: null, images: [] },
-    });
-    const fromInteraction = buildItem({
-      sourceKind: "issue_thread_interaction",
-      detail: { kind: "plan_approval", issueTitle: "I", planTitle: "P", summaryExcerpt: null, images: [] },
-    });
-    expect(attentionTone(fromApproval)).toBe("violet");
-    expect(attentionTone(fromInteraction)).toBe("violet");
-    expect(attentionToneStyle(fromApproval).accent).toContain("violet");
-  });
-
-  it("colors confirmations / questions / verdicts in the sky family", () => {
-    expect(attentionTone(buildItem({ sourceKind: "approval" }))).toBe("sky");
-    expect(attentionTone(buildItem({ sourceKind: "issue_thread_interaction" }))).toBe("sky");
-    expect(
-      attentionTone(
-        buildItem({
-          sourceKind: "issue_thread_interaction",
-          detail: { kind: "questions", questionCount: 2, firstQuestionText: "?", images: [] },
-        }),
-      ),
-    ).toBe("sky");
-  });
-
-  it("colors failures rose and blocked/recovery/budget amber", () => {
-    expect(attentionTone(buildItem({ sourceKind: "failed_run" }))).toBe("rose");
-    expect(attentionTone(buildItem({ sourceKind: "agent_error_alert" }))).toBe("rose");
-    expect(attentionTone(buildItem({ sourceKind: "blocker_attention" }))).toBe("amber");
-    expect(attentionTone(buildItem({ sourceKind: "recovery_action" }))).toBe("amber");
-    expect(attentionTone(buildItem({ sourceKind: "budget_alert" }))).toBe("amber");
-  });
-
-  it("colors join requests neutral", () => {
-    expect(attentionTone(buildItem({ sourceKind: "join_request" }))).toBe("neutral");
-  });
-
-  it("gives every tone a distinct accent and never keys color off severity", () => {
-    const rose = buildItem({ sourceKind: "failed_run", severity: "low" });
-    const amber = buildItem({ sourceKind: "budget_alert", severity: "critical" });
-    // Same-source rows with opposite severities share one accent (color ≠ severity).
-    expect(attentionToneStyle(buildItem({ sourceKind: "failed_run", severity: "critical" })).accent).toBe(
-      attentionToneStyle(rose).accent,
-    );
-    expect(attentionToneStyle(rose).accent).not.toBe(attentionToneStyle(amber).accent);
-  });
-});
-
 describe("severityBadge (anatomy 2a — outline badges, red = Critical only)", () => {
   it("only surfaces a badge for Critical/High", () => {
     expect(severityBadge("critical")?.label).toBe("Critical");

ui/src/lib/attention.ts

@@ -60,89 +60,6 @@ export function sourceMeta(kind: AttentionSourceKind): SourceMeta {
   return SOURCE_META[kind] ?? { label: kind.replaceAll("_", " "), icon: AlertTriangle };
 }
 
-// ---------------------------------------------------------------------------
-// Canonical type → color map (PAP-13409 §4)
-//
-// The row color is driven by the *kind of decision*, never by severity — one
-// map, sourced from `IssueThreadInteractionCard`'s palette so a plan approval or
-// confirmation reads identically in the queue and on the issue thread:
-//   • confirmations / questions / suggested-tasks / verdicts / reviews → sky
-//   • plan approvals                                                   → violet
-//   • failures (failed run, agent error)                              → rose
-//   • blocked / recovery / budget                                     → amber
-//   • join request                                                    → neutral
-// Severity only ever surfaces as a small Critical/High badge (never the accent).
-// ---------------------------------------------------------------------------
-
-export type AttentionTone = "sky" | "violet" | "rose" | "amber" | "neutral";
-
-export interface AttentionToneStyle {
-  /** Left accent bar background. */
-  accent: string;
-  /** Source-icon tint. */
-  icon: string;
-  /** Chip / badge border+bg+text (matches the interaction card badge palette). */
-  chip: string;
-}
-
-const TONE_STYLE: Record<AttentionTone, AttentionToneStyle> = {
-  sky: {
-    accent: "bg-sky-500",
-    icon: "text-sky-600 dark:text-sky-400",
-    chip: "border-sky-500/60 bg-sky-500/10 text-sky-900 dark:bg-sky-500/15 dark:text-sky-100",
-  },
-  violet: {
-    accent: "bg-violet-500",
-    icon: "text-violet-600 dark:text-violet-400",
-    chip: "border-violet-500/60 bg-violet-500/10 text-violet-900 dark:bg-violet-500/15 dark:text-violet-100",
-  },
-  rose: {
-    accent: "bg-rose-500",
-    icon: "text-rose-600 dark:text-rose-400",
-    chip: "border-rose-500/60 bg-rose-500/10 text-rose-900 dark:bg-rose-500/15 dark:text-rose-100",
-  },
-  amber: {
-    accent: "bg-amber-500",
-    icon: "text-amber-600 dark:text-amber-400",
-    chip: "border-amber-500/60 bg-amber-500/10 text-amber-900 dark:bg-amber-500/15 dark:text-amber-100",
-  },
-  neutral: {
-    accent: "bg-muted-foreground/40",
-    icon: "text-muted-foreground",
-    chip: "border-border/70 bg-muted/50 text-muted-foreground",
-  },
-};
-
-/**
- * Resolve the canonical tone for a row. A plan approval is violet regardless of
- * which surface tagged it (approval flow *or* issue-thread confirmation), so we
- * check the T1 detail discriminant first, then fall back to the source kind.
- */
-export function attentionTone(item: AttentionItem): AttentionTone {
-  if (item.detail?.kind === "plan_approval") return "violet";
-  switch (item.sourceKind) {
-    case "failed_run":
-    case "agent_error_alert":
-      return "rose";
-    case "blocker_attention":
-    case "recovery_action":
-    case "budget_alert":
-      return "amber";
-    case "join_request":
-      return "neutral";
-    case "approval":
-    case "issue_thread_interaction":
-    case "review":
-    case "productivity_review":
-    default:
-      return "sky";
-  }
-}
-
-export function attentionToneStyle(item: AttentionItem): AttentionToneStyle {
-  return TONE_STYLE[attentionTone(item)];
-}
-
 /**
  * Severity is demoted to a small badge — and only when it is genuinely
  * escalated (Critical/High). Medium/Low return `null` so most rows carry no