From f2a1860185714d2921162a754425065d867bcce6 Mon Sep 17 00:00:00 2001
From: seonghobae <seonghobae@users.noreply.github.com>
Date: Mon, 31 Aug 2026 17:23:08 +0000
Subject: [PATCH] feat(reports): leftover-map origin on leftover-map comparison
 graphic leftover-map post leftover-map person coordinates independently of
 leftover-map graphic leftover-map post leftover-map origin leftover-map
 person coordinates (v2.106.0)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Caption leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates through leftoverMapComparePlotPostBadge independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates (ADR 0349). Distinct accessible name Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person} when leftoverMapPlotCoordinatePairIsOrigin returns true. Rank-0 unused axes still name leftover-map origin (0.00, 0.00). leftoverMapPlotPostBadge stays leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map item coordinate keys. Do not invent leftover-map origin from leftover-map item coordinates ζ. Do not mix #877.
---
 AGENTS.md                                     |  7 ++
 ARCHITECTURE.md                               |  2 +
 ...over-map-compare-plot-post-origin-badge.md | 12 +++
 CHANGELOG.md                                  | 10 +++
 ...tover-map-compare-plot-post-coordinates.md |  4 +-
 ...over-map-compare-plot-post-origin-badge.md | 88 +++++++++++++++++++
 docs/product-technical-gap-baseline.md        | 10 +++
 frontend/package.json                         |  2 +-
 .../src/components/LeftoverMapPlot.test.tsx   |  7 +-
 frontend/src/components/LeftoverMapPlot.tsx   |  4 +-
 frontend/src/i18n.test.ts                     | 19 ++++
 frontend/src/i18n.ts                          |  8 ++
 frontend/src/leftoverMapAxisBadge.ts          |  2 +
 frontend/src/leftoverMapCoordinates.test.ts   | 18 ++++
 frontend/src/leftoverMapCoordinates.ts        |  6 ++
 frontend/src/leftoverMapPlotAxisSingular.ts   |  3 +
 frontend/src/leftoverMapPlotLayout.test.ts    | 31 ++++++-
 frontend/src/leftoverMapPlotLayout.ts         | 13 ++-
 pyproject.toml                                |  2 +-
 19 files changed, 240 insertions(+), 8 deletions(-)
 create mode 100644 CHANGELOG.d/2.106.0-leftover-map-compare-plot-post-origin-badge.md
 create mode 100644 docs/adr/0349-leftover-map-compare-plot-post-origin-badge.md

diff --git a/AGENTS.md b/AGENTS.md
index 347e41661..b83fd7c22 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -856,6 +856,11 @@ returns a leftover-map origin leftover-map person coordinate caption independent
 `Open leftover-map post {title} at leftover-map origin ξ {person}`. Rank-0 unused axes still name leftover-map origin `(0.00, 0.00)`.
 Do not invent leftover-map origin from leftover-map item coordinates `ζ`. leftoverMapComparePlotPostBadge stays leftover-map comparison graphic leftover-map
 post leftover-map person coordinate keys. leftoverMapPlotCriterionBadge stays leftover-map graphic leftover-map criterion leftover-map origin leftover-map item coordinate keys this increment.
+ADR 0349 captions leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates with leftover-map origin when leftoverMapComparePlotPostBadge
+returns a leftover-map origin leftover-map person coordinate caption independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates. Distinct accessible name
+`Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}`. Rank-0 unused axes still name leftover-map origin `(0.00, 0.00)`.
+Do not invent leftover-map origin from leftover-map item coordinates `ζ`. leftoverMapPlotPostBadge stays leftover-map graphic leftover-map
+post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map item coordinate keys this increment.
 When `R`, `R̂`, `U`, `x`,
 `s`, and `e` are finite, `e + s + x = 1`. When `Y`, `E`, and `R` are
 finite, `Y − E = R`. When `R`, `R̂`, and `U` are
@@ -1041,6 +1046,8 @@ Leftover-map graphic leftover-map criterion leftover-map origin leftover-map ite
 (ADR 0347) captions leftover-map graphic leftover-map criterion leftover-map origin leftover-map item coordinates when leftoverMapPlotCriterionBadge returns a leftover-map origin leftover-map item coordinate caption.
 Leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates independently of leftover-map criterion leftover-map item coordinates
 (ADR 0348) captions leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates when leftoverMapPlotPostBadge returns a leftover-map origin leftover-map person coordinate caption.
+Leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates
+(ADR 0349) captions leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates when leftoverMapComparePlotPostBadge returns a leftover-map origin leftover-map person coordinate caption.
 Item complete-case coverage
 (ADR 0282) captions the leftover-map graphic with how many scored criteria
 entered the map. Item complete-case coverage on the pair list (ADR 0285)
diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index e6bf0fd85..3d8a6e402 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -821,6 +821,8 @@ ADR 0347 captions leftover-map graphic leftover-map criterion leftover-map origi
 returns a leftover-map origin leftover-map item coordinate caption independently of leftover-map person coordinates.
 ADR 0348 captions leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates when leftoverMapPlotPostBadge
 returns a leftover-map origin leftover-map person coordinate caption independently of leftover-map criterion leftover-map item coordinates.
+ADR 0349 captions leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates when leftoverMapComparePlotPostBadge
+returns a leftover-map origin leftover-map person coordinate caption independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates.
 Click a post marker or a pair button
 opens that post. Those ADRs are the normative mathematical, storage, and
 display contracts. Leftover-map axis share
diff --git a/CHANGELOG.d/2.106.0-leftover-map-compare-plot-post-origin-badge.md b/CHANGELOG.d/2.106.0-leftover-map-compare-plot-post-origin-badge.md
new file mode 100644
index 000000000..565a01406
--- /dev/null
+++ b/CHANGELOG.d/2.106.0-leftover-map-compare-plot-post-origin-badge.md
@@ -0,0 +1,12 @@
+## 2.106.0 — Leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates
+
+- Caption leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates through leftoverMapComparePlotPostBadge
+  independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates (ADR 0349). After `make seed`, leftover-map comparison graphic leftover-map
+  post leftover-map origin leftover-map person coordinates name leftover-map origin when leftoverMapPlotCoordinatePairIsOrigin returns true. Distinct accessible name
+  `Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}`. Rank-0 unused axes still name leftover-map origin `(0.00, 0.00)`.
+  Non-origin leftover-map comparison graphic leftover-map post leftover-map person coordinates stay
+  `Open leftover map comparison graphic leftover-map post {title} at ξ {person}`. leftoverMapPlotPostBadge stays leftover-map graphic leftover-map
+  post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map
+  item coordinate keys this increment. Do not invent leftover-map origin from leftover-map item coordinates `ζ`.
+  Do not mix #877. A finite negative leftover is shown, never clamped. Never invent a leftover score.
+  Never invent a theta. No new columns.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78e3264ba..a97a8a249 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,16 @@ All notable changes to this project are documented here. Format follows
 
 ### Added
 
+- Period leftover pairs now caption leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person coordinates
+  through leftoverMapComparePlotPostBadge independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates (ADR 0349 / v2.106.0). After `make seed`, leftover-map comparison graphic leftover-map
+  post leftover-map origin leftover-map person coordinates name leftover-map origin when leftoverMapPlotCoordinatePairIsOrigin returns true. Distinct accessible name
+  `Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}`. Rank-0 unused axes still name leftover-map origin `(0.00, 0.00)`.
+  Non-origin leftover-map comparison graphic leftover-map post leftover-map person coordinates stay
+  `Open leftover map comparison graphic leftover-map post {title} at ξ {person}`. leftoverMapPlotPostBadge stays leftover-map graphic leftover-map
+  post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map
+  item coordinate keys this increment. Do not invent leftover-map origin from leftover-map item coordinates `ζ`.
+  Do not mix #877. A finite negative leftover is shown, never clamped. Never invent a leftover score or a theta. No new columns.
+
 - Period leftover pairs now caption leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates
   through leftoverMapPlotPostBadge independently of leftover-map criterion leftover-map item coordinates (ADR 0348 / v2.105.0). After `make seed`, leftover-map graphic leftover-map
   post leftover-map origin leftover-map person coordinates name leftover-map origin when leftoverMapPlotCoordinatePairIsOrigin returns true. Distinct accessible name
diff --git a/docs/adr/0337-leftover-map-compare-plot-post-coordinates.md b/docs/adr/0337-leftover-map-compare-plot-post-coordinates.md
index dc0122fe1..dc32fd301 100644
--- a/docs/adr/0337-leftover-map-compare-plot-post-coordinates.md
+++ b/docs/adr/0337-leftover-map-compare-plot-post-coordinates.md
@@ -4,7 +4,9 @@
 **Date:** 2026-08-31
 
 **Amended by:** [ADR 0338](0338-leftover-map-plot-post-coordinates.md)
-(leftover-map person coordinates on leftover-map graphic leftover-map post markers)
+(leftover-map person coordinates on leftover-map graphic leftover-map post markers);
+[ADR 0349](0349-leftover-map-compare-plot-post-origin-badge.md)
+(leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates)
 
 Amends leftover-map graphic display of persisted coordinates on the grouping comparison strip
 ([ADR 0304](0304-leftover-map-compare-graphic.md)), leftover-map comparison graphic leftover-map criterion leftover-map item coordinates
diff --git a/docs/adr/0349-leftover-map-compare-plot-post-origin-badge.md b/docs/adr/0349-leftover-map-compare-plot-post-origin-badge.md
new file mode 100644
index 000000000..f72db4703
--- /dev/null
+++ b/docs/adr/0349-leftover-map-compare-plot-post-origin-badge.md
@@ -0,0 +1,88 @@
+# ADR 0349 — Name leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates
+
+**Decision status:** Accepted
+**Date:** 2026-08-31
+
+Amends leftover-map person coordinates on leftover-map comparison graphic leftover-map post markers independently of leftover-map criterion leftover-map item coordinates
+([ADR 0337](0337-leftover-map-compare-plot-post-coordinates.md)). Independent of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates independently of leftover-map criterion leftover-map item coordinates
+([ADR 0348](0348-leftover-map-plot-post-origin-badge.md)). Independent of leftover-map graphic leftover-map criterion leftover-map origin leftover-map item coordinates independently of leftover-map person coordinates
+([ADR 0347](0347-leftover-map-plot-criterion-origin-badge.md)). Independent of leftover-map leftover-axis origin ticks independently of leftover-map axis share and leftover-map singular values
+([ADR 0346](0346-leftover-map-axis-tick-origin-badge.md)). Independent of leftover-map leftover-axis origin ticks on the competing origin-tick stack (do not mix #877).
+
+## Context
+
+ADR 0337 already names leftover-map comparison graphic leftover-map post leftover-map person coordinates
+`Open leftover map comparison graphic leftover-map post {title} at ξ {person}`. Rank-0 unused axes still persist leftover-map
+origin `(0.00, 0.00)` (`formatSignedLeftoverValue(0)` emits no plus). Origin leftover-map
+person coordinates still interpolate leftover-map origin only through leftover-map comparison graphic leftover-map post leftover-map
+person coordinate keys. A missing or non-finite leftover-map person coordinate pair omits independently
+of leftover-map item coordinates `ζ`. A finite negative leftover is shown, never clamped.
+Do not invent leftover-map origin from leftover-map item coordinates `ζ`. leftoverMapPlotPostBadge stays
+`Open leftover-map post {title} at leftover-map origin ξ {person}`
+this increment. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map
+item coordinate keys this increment.
+
+This increment names leftover-map comparison graphic leftover-map post leftover-map origin leftover-map
+person coordinates as leftoverMapComparePlotPostBadge. Leftover-map comparison graphic leftover-map post leftover-map origin leftover-map
+person coordinates stay
+`Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}`
+when leftoverMapPlotCoordinatePairIsOrigin returns true, so they stay distinct from leftover-map
+comparison graphic leftover-map post leftover-map person coordinates
+`Open leftover map comparison graphic leftover-map post {title} at ξ {person}`,
+leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates
+`Open leftover-map post {title} at leftover-map origin ξ {person}`,
+and leftover-map graphic leftover-map criterion leftover-map origin leftover-map item coordinates
+`leftover-map criterion {label} at leftover-map origin ζ {item}`.
+It does not add columns. Do not invent a leftover score. Do not invent a theta.
+
+This protected increment uses **0349** so it does not collide with leftover-map graphic leftover-map
+post leftover-map origin leftover-map person coordinates independently of leftover-map criterion leftover-map item coordinates
+(0348) or leftover-map leftover-axis origin ticks (#877).
+
+## Decision
+
+On leftover-map comparison graphic leftover-map post markers, caption leftover-map origin
+when leftoverMapPlotCoordinatePairIsOrigin returns true. Rank-0 unused axes still name leftover-map
+origin `(0.00, 0.00)`. Non-origin leftover-map person coordinates stay leftover-map comparison graphic leftover-map post leftover-map
+person coordinate keys. leftoverMapPlotPostBadge, leftoverMapPlotCriterionBadge,
+leftoverMapComparePlotCriterionBadge, leftoverMapListPostBadge, leftoverMapCompareListPostBadge, leftoverMapPlotTickAxisBadge,
+leftoverMapComparePlotTickAxisBadge, leftoverMapCompareAxisTickBadge, and leftoverMapAxisTickBadge
+do not change leftover-map origin naming this increment.
+
+Do not add SQL. Do not edit shipped migrations. Do not invent a leftover
+score. Do not invent a theta.
+
+## Consequences
+
+After `make seed`, leftover-map comparison graphic leftover-map post leftover-map origin leftover-map person
+coordinates name leftover-map origin independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates. Rank-0 unused
+axes still name leftover-map origin `(0.00, 0.00)`. leftoverMapPlotPostBadge stays leftover-map graphic leftover-map
+post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge
+stays leftover-map comparison graphic leftover-map criterion leftover-map item coordinate keys. leftover-map comparison graphic leftover-map
+post leftover-map person coordinates independently of leftover-map criterion leftover-map item coordinates
+(ADR 0337) remain.
+
+## Related
+
+Independent of leftover-map graphic leftover-map post leftover-map origin leftover-map person
+coordinates independently of leftover-map criterion leftover-map item coordinates
+([ADR 0348](0348-leftover-map-plot-post-origin-badge.md)). Independent of leftover-map
+person coordinates on leftover-map comparison graphic leftover-map post markers independently of leftover-map
+criterion leftover-map item coordinates ([ADR 0337](0337-leftover-map-compare-plot-post-coordinates.md)). Independent of leftover-map
+leftover-axis origin ticks independently of leftover-map axis share and leftover-map singular values
+([ADR 0346](0346-leftover-map-axis-tick-origin-badge.md)). Independent of leftover-map
+graphic leftover-map criterion leftover-map origin leftover-map item coordinates independently of leftover-map
+person coordinates ([ADR 0347](0347-leftover-map-plot-criterion-origin-badge.md)).
+
+## References
+
+Gabriel, K. R. (1971). The biplot graphic display of matrices with
+application to principal component analysis. *Biometrika, 58*(3),
+453–467. https://doi.org/10.1093/biomet/58.3.453
+
+Jeon, M., Jin, I. H., Schweinberger, M., & Baugh, S. (2021). Mapping
+unobserved item–respondent interactions: A latent space item response
+model with interaction map. *Psychometrika, 86*(2), 378–403.
+https://doi.org/10.1007/s11336-021-09762-5
+(LSIRM interaction `−γ‖ξ_j − ζ_i‖` after main effects
+`α_j − β_i`; typically `p = 2` for the interaction map.)
diff --git a/docs/product-technical-gap-baseline.md b/docs/product-technical-gap-baseline.md
index 48dad4fcc..ac310e3d2 100644
--- a/docs/product-technical-gap-baseline.md
+++ b/docs/product-technical-gap-baseline.md
@@ -1,5 +1,15 @@
 # Product & Technical Gap Baseline
 
+> Exact-head loop overlay: 2026-09-01 02:25 KST. Protected `main` is
+> `cb187cadee5fb6c46d8a944815ccc154a1e028d1`. Writes work. Do not
+> self-approve. #892 leftover-map graphic leftover-map post leftover-map origin leftover-map
+> person coordinates independently of leftover-map criterion leftover-map item coordinates (v2.105.0 / ADR 0348) is
+> `c941929`, stacked on #891 @ `47dd988`. Independent APPROVE is missing (Devin COMMENTED,
+> not APPROVE). Next buyer increment on this cycle: leftover-map comparison graphic leftover-map post leftover-map origin leftover-map
+> person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates as leftoverMapComparePlotPostBadge (ADR 0349 / v2.106.0) delivered locally on
+> `feat/leftover-map-compare-plot-post-origin-badge-v21060`. Distinct accessible name
+> `Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}`. Rank-0 unused axes still name leftover-map origin `(0.00, 0.00)`. leftoverMapPlotPostBadge stays leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinate keys. leftoverMapComparePlotCriterionBadge stays leftover-map comparison graphic leftover-map criterion leftover-map item coordinate keys. Do not invent leftover-map origin from leftover-map item coordinates `ζ`. Do not mix #877. Stack onto #892. Leave open for independent review. Do not squash-merge. Do not self-approve. Issues #79 and #87 stay open. Do not merge #808 without independent APPROVE. #96 closed as weaker duplicate of #91.
+
 > Exact-head loop overlay: 2026-09-01 02:20 KST. Protected `main` is
 > `cb187cadee5fb6c46d8a944815ccc154a1e028d1`. Writes work. Do not
 > self-approve. #891 leftover-map graphic leftover-map criterion leftover-map origin leftover-map
diff --git a/frontend/package.json b/frontend/package.json
index b94b545db..f4c502de3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "frontend",
   "private": true,
-  "version": "2.105.0",
+  "version": "2.106.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/frontend/src/components/LeftoverMapPlot.test.tsx b/frontend/src/components/LeftoverMapPlot.test.tsx
index 9ccf3aaa6..ccb6c94ab 100644
--- a/frontend/src/components/LeftoverMapPlot.test.tsx
+++ b/frontend/src/components/LeftoverMapPlot.test.tsx
@@ -1004,9 +1004,14 @@ describe("LeftoverMapPlot", () => {
     ).toBeInTheDocument();
     expect(
       screen.getByRole("button", {
-        name: "Open leftover map comparison graphic leftover-map post Public post at ξ (0.00, 0.00)",
+        name: "Open leftover map comparison graphic leftover-map post Public post at leftover-map origin ξ (0.00, 0.00)",
       }),
     ).toBeInTheDocument();
+    expect(
+      screen.queryByRole("button", {
+        name: "Open leftover map comparison graphic leftover-map post Public post at ξ (0.00, 0.00)",
+      }),
+    ).not.toBeInTheDocument();
     expect(
       screen.queryByRole("button", {
         name: "Open leftover-map post Public post at ξ (0.00, 0.00)",
diff --git a/frontend/src/components/LeftoverMapPlot.tsx b/frontend/src/components/LeftoverMapPlot.tsx
index 58c7547e1..137206fe8 100644
--- a/frontend/src/components/LeftoverMapPlot.tsx
+++ b/frontend/src/components/LeftoverMapPlot.tsx
@@ -172,7 +172,9 @@ function leftoverMapPlotPostText(
  * returns true. Caption leftover-map comparison graphic leftover-map
  * criterion markers with persisted leftover-map item coordinates ``ζ_{1:2}``
  * when leftoverMapComparePlotCriterionBadge returns a usable leftover-map comparison
- * graphic leftover-map criterion leftover-map item coordinate caption. Caption leftover-map
+ * graphic leftover-map criterion leftover-map item coordinate caption. Caption leftover-map origin on leftover-map comparison graphic leftover-map
+ * post leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates when leftoverMapPlotCoordinatePairIsOrigin
+ * returns true. Caption leftover-map
  * comparison graphic leftover-map post markers with persisted leftover-map person coordinates
  * ``ξ_{1:2}`` when leftoverMapComparePlotPostBadge returns a usable leftover-map comparison
  * graphic leftover-map post leftover-map person coordinate caption. Caption leftover-map graphic leftover-map
diff --git a/frontend/src/i18n.test.ts b/frontend/src/i18n.test.ts
index 73f53946c..483dfda89 100644
--- a/frontend/src/i18n.test.ts
+++ b/frontend/src/i18n.test.ts
@@ -174,6 +174,7 @@ describe("i18n", () => {
     "Open leftover-map post {title} at leftover-map origin ξ {person}",
     "Open leftover-map post {title}",
     "Open leftover map comparison graphic leftover-map post {title} at ξ {person}",
+    "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}",
     "Read observed Y {observed} and expected E {expected} after IRT main effects, then open this post.",
     "Leftover map has no leftover structure after IRT main effects. Open this post.",
     "Leftover map rank {rank} after IRT main effects. Open this post.",
@@ -537,6 +538,24 @@ describe("i18n", () => {
     ).toBe(expected);
   });
 
+  it.each([
+    ["ko", "잔여 지도 비교 그림 원점 글 Public post 열기 (ξ (0.00, 0.00))"],
+    ["zh", "打开残差地图比较图形原点帖子 Public post（ξ (0.00, 0.00)）"],
+    ["ja", "残差マップの比較図の原点投稿 Public post を開く（ξ (0.00, 0.00)）"],
+    ["vi", "Mở bài gốc đồ họa so sánh bản đồ phần dư Public post tại ξ (0.00, 0.00)"],
+  ] as const)(
+    "formats leftover map comparison graphic leftover-map post leftover-map origin ξ in %s",
+    (locale, expected) => {
+      setLocale(locale);
+      expect(
+        tf("Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}", {
+          title: "Public post",
+          person: "(0.00, 0.00)",
+        }),
+      ).toBe(expected);
+    },
+  );
+
   it.each([
     ["ko", "잔여 지도 그림 포함 범위"],
     ["zh", "残差图图形覆盖范围"],
diff --git a/frontend/src/i18n.ts b/frontend/src/i18n.ts
index d45eb28e4..8763884df 100644
--- a/frontend/src/i18n.ts
+++ b/frontend/src/i18n.ts
@@ -701,6 +701,8 @@ const TRANSLATIONS: Partial<Record<Locale, Record<string, string>>> = {
     "Open leftover-map post {title}": "잔여 지도 글 {title} 열기",
     "Open leftover map comparison graphic leftover-map post {title} at ξ {person}":
       "잔여 지도 비교 그림 글 {title} 열기 (ξ {person})",
+    "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}":
+      "잔여 지도 비교 그림 원점 글 {title} 열기 (ξ {person})",
     "leftover-map axis 1": "잔여 지도 축 1",
     "leftover-map axis 2": "잔여 지도 축 2",
     "leftover-map axis {axis} ({share}%)": "잔여 지도 축 {axis} ({share}%)",
@@ -1423,6 +1425,8 @@ const TRANSLATIONS: Partial<Record<Locale, Record<string, string>>> = {
     "Open leftover-map post {title}": "打开残差图帖子 {title}",
     "Open leftover map comparison graphic leftover-map post {title} at ξ {person}":
       "打开残差地图比较图形帖子 {title}（ξ {person}）",
+    "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}":
+      "打开残差地图比较图形原点帖子 {title}（ξ {person}）",
     "leftover-map axis 1": "残差图轴 1",
     "leftover-map axis 2": "残差图轴 2",
     "leftover-map axis {axis} ({share}%)": "残差图轴 {axis} ({share}%)",
@@ -2149,6 +2153,8 @@ const TRANSLATIONS: Partial<Record<Locale, Record<string, string>>> = {
     "Open leftover-map post {title}": "残差マップの投稿 {title} を開く",
     "Open leftover map comparison graphic leftover-map post {title} at ξ {person}":
       "残差マップの比較図の投稿 {title} を開く（ξ {person}）",
+    "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}":
+      "残差マップの比較図の原点投稿 {title} を開く（ξ {person}）",
     "leftover-map axis 1": "残差マップ軸 1",
     "leftover-map axis 2": "残差マップ軸 2",
     "leftover-map axis {axis} ({share}%)": "残差マップ軸 {axis} ({share}%)",
@@ -2879,6 +2885,8 @@ const TRANSLATIONS: Partial<Record<Locale, Record<string, string>>> = {
     "Open leftover-map post {title}": "Mở bài viết bản đồ phần dư {title}",
     "Open leftover map comparison graphic leftover-map post {title} at ξ {person}":
       "Mở bài đồ họa so sánh bản đồ phần dư {title} tại ξ {person}",
+    "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}":
+      "Mở bài gốc đồ họa so sánh bản đồ phần dư {title} tại ξ {person}",
     "leftover-map axis 1": "trục bản đồ phần dư 1",
     "leftover-map axis 2": "trục bản đồ phần dư 2",
     "leftover-map axis {axis} ({share}%)": "trục bản đồ phần dư {axis} ({share}%)",
diff --git a/frontend/src/leftoverMapAxisBadge.ts b/frontend/src/leftoverMapAxisBadge.ts
index eb81991fd..57fcb37ae 100644
--- a/frontend/src/leftoverMapAxisBadge.ts
+++ b/frontend/src/leftoverMapAxisBadge.ts
@@ -34,6 +34,8 @@
  *  item coordinates as leftoverMapPlotCriterionBadge, not this helper.
  *  ADR 0348 names leftover-map origin on leftover-map graphic leftover-map post leftover-map
  *  person coordinates as leftoverMapPlotPostBadge, not this helper.
+ *  ADR 0349 names leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map
+ *  person coordinates as leftoverMapComparePlotPostBadge, not this helper.
  */
 
 import type { LeftoverMapAxis } from "./api";
diff --git a/frontend/src/leftoverMapCoordinates.test.ts b/frontend/src/leftoverMapCoordinates.test.ts
index e6be8c09e..4cf5bb6c1 100644
--- a/frontend/src/leftoverMapCoordinates.test.ts
+++ b/frontend/src/leftoverMapCoordinates.test.ts
@@ -6,6 +6,7 @@ import {
   leftoverMapPlotPostBadge,
   LEFTOVER_MAP_COMPARE_PLOT_CRITERION,
   LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+  LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
   LEFTOVER_MAP_PLOT_CRITERION,
   LEFTOVER_MAP_PLOT_CRITERION_ORIGIN,
   LEFTOVER_MAP_PLOT_POST_ACTION,
@@ -80,13 +81,22 @@ describe("leftoverMapPlotCoordinatePairIsOrigin", () => {
     expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
     expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_CRITERION_ORIGIN);
     expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION);
+    expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)?.key).toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
     expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN,
     );
+    expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+    );
     expect(leftoverMapListCriterionBadge("sales-lead", 0, 0)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_CRITERION_ORIGIN,
     );
     expect(leftoverMapListPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
+    expect(leftoverMapListPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
   });
 });
 
@@ -108,6 +118,9 @@ describe("leftoverMapListPostBadge", () => {
       values: { title: "Public post", person: "(0.00, 0.00)" },
     });
     expect(leftoverMapListPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
+    expect(leftoverMapListPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
   });
 
   it("omits leftover-map person coordinates when ξ is missing or non-finite", () => {
@@ -129,6 +142,7 @@ describe("leftoverMapListPostBadge", () => {
     );
     expect(LEFTOVER_MAP_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION);
     expect(LEFTOVER_MAP_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
+    expect(LEFTOVER_MAP_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN);
     expect(LEFTOVER_MAP_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION);
     expect(LEFTOVER_MAP_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_COMPARE_LIST_POST_ACTION);
     expect(leftoverMapListPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
@@ -217,6 +231,9 @@ describe("leftoverMapCompareListPostBadge", () => {
       key: LEFTOVER_MAP_COMPARE_LIST_POST_ACTION,
       values: { title: "Public post", person: "(0.00, 0.00)" },
     });
+    expect(leftoverMapCompareListPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
   });
 
   it("omits leftover-map person coordinates when ξ is missing or non-finite", () => {
@@ -241,6 +258,7 @@ describe("leftoverMapCompareListPostBadge", () => {
     expect(LEFTOVER_MAP_COMPARE_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_LIST_POST_ACTION);
     expect(LEFTOVER_MAP_COMPARE_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION);
     expect(LEFTOVER_MAP_COMPARE_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION);
+    expect(LEFTOVER_MAP_COMPARE_LIST_POST_ACTION).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN);
     expect(leftoverMapCompareListPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
       leftoverMapListPostBadge("Public post", 0.5, 0.1)?.key ?? "",
     );
diff --git a/frontend/src/leftoverMapCoordinates.ts b/frontend/src/leftoverMapCoordinates.ts
index a0b1e7574..0518c9669 100644
--- a/frontend/src/leftoverMapCoordinates.ts
+++ b/frontend/src/leftoverMapCoordinates.ts
@@ -7,6 +7,10 @@
  *  post leftover-map person coordinates as leftoverMapPlotPostBadge independently of leftover-map
  *  criterion leftover-map item coordinates. leftoverMapListPostBadge stays leftover-map pair leftover-map
  *  post leftover-map person coordinate keys.
+ *  ADR 0349 names leftover-map origin on leftover-map comparison graphic leftover-map
+ *  post leftover-map person coordinates as leftoverMapComparePlotPostBadge independently of leftover-map
+ *  graphic leftover-map post leftover-map origin leftover-map person coordinates. leftoverMapListPostBadge stays leftover-map pair leftover-map
+ *  post leftover-map person coordinate keys.
  */
 
 import { formatSignedLeftoverValue } from "./leftoverMapUnexplained";
@@ -84,6 +88,8 @@ export function formatLeftoverMapCoordinates(
 /** ADR 0339 leftover-map pair leftover-map post leftover-map person coordinates ξ.
  *  ADR 0348 names leftover-map origin on leftover-map graphic leftover-map post leftover-map
  *  person coordinates as leftoverMapPlotPostBadge, not this helper.
+ *  ADR 0349 names leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map
+ *  person coordinates as leftoverMapComparePlotPostBadge, not this helper.
  */
 export function leftoverMapListPostBadge(
   title: string,
diff --git a/frontend/src/leftoverMapPlotAxisSingular.ts b/frontend/src/leftoverMapPlotAxisSingular.ts
index 9ae05e2f8..eef2b2706 100644
--- a/frontend/src/leftoverMapPlotAxisSingular.ts
+++ b/frontend/src/leftoverMapPlotAxisSingular.ts
@@ -46,6 +46,9 @@
  *  ADR 0348 names leftover-map origin on leftover-map graphic leftover-map post leftover-map
  *  person coordinates as leftoverMapPlotPostBadge independently of leftover-map criterion leftover-map
  *  item coordinates, not leftoverMapPlotTickAxisBadge.
+ *  ADR 0349 names leftover-map origin on leftover-map comparison graphic leftover-map post leftover-map
+ *  person coordinates as leftoverMapComparePlotPostBadge independently of leftover-map graphic leftover-map post leftover-map
+ *  origin leftover-map person coordinates, not leftoverMapPlotTickAxisBadge.
  */
 
 import type { LeftoverMapAxis } from "./api";
diff --git a/frontend/src/leftoverMapPlotLayout.test.ts b/frontend/src/leftoverMapPlotLayout.test.ts
index ac8c7a976..be80eae59 100644
--- a/frontend/src/leftoverMapPlotLayout.test.ts
+++ b/frontend/src/leftoverMapPlotLayout.test.ts
@@ -30,6 +30,7 @@ import {
   LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN,
   LEFTOVER_MAP_PLOT_POST_ACTION_OMITTED,
   LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+  LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
   LEFTOVER_MAP_PLOT_TICK,
   PLOT_HEIGHT,
   PLOT_PADDING,
@@ -1288,6 +1289,9 @@ describe("leftoverMapComparePlotCriterionBadge", () => {
     expect(leftoverMapComparePlotCriterionBadge("sales-lead", 0, 0)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_CRITERION_ORIGIN,
     );
+    expect(leftoverMapComparePlotCriterionBadge("sales-lead", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
   });
 
   it("omits leftover-map item coordinates when ζ is missing or non-finite", () => {
@@ -1340,6 +1344,9 @@ describe("leftoverMapPlotPostBadge", () => {
     });
     expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION);
     expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION);
+    expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
     expect(leftoverMapPlotCriterionBadge("sales-lead", 0, 0)?.key).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
   });
 
@@ -1368,6 +1375,9 @@ describe("leftoverMapPlotPostBadge", () => {
     expect(leftoverMapPlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN,
     );
+    expect(leftoverMapPlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
     expect(leftoverMapPlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_CRITERION,
     );
@@ -1386,14 +1396,23 @@ describe("leftoverMapComparePlotPostBadge", () => {
     });
   });
 
-  it("names rank-0 origin leftover-map person coordinates as ξ (0.00, 0.00)", () => {
+  it("names rank-0 leftover-map origin leftover-map person coordinates independently of leftover-map graphic leftover-map post leftover-map origin leftover-map person coordinates", () => {
     expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)).toEqual({
-      key: LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+      key: LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
       values: { title: "Public post", person: "(0.00, 0.00)" },
     });
+    expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+    );
     expect(leftoverMapComparePlotPostBadge("Public post", 0, 0)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN,
     );
+    expect(leftoverMapPlotPostBadge("Public post", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
+    expect(leftoverMapComparePlotCriterionBadge("sales-lead", 0, 0)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
   });
 
   it("omits leftover-map person coordinates when ξ is missing or non-finite", () => {
@@ -1407,6 +1426,11 @@ describe("leftoverMapComparePlotPostBadge", () => {
     expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION).toBe(
       "Open leftover map comparison graphic leftover-map post {title} at ξ {person}",
     );
+    expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN).toBe(
+      "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}",
+    );
+    expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN).not.toBe(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION);
+    expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
     expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION);
     expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_ORIGIN);
     expect(LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION).not.toBe(LEFTOVER_MAP_PLOT_POST_ACTION_OMITTED);
@@ -1415,6 +1439,9 @@ describe("leftoverMapComparePlotPostBadge", () => {
     expect(leftoverMapComparePlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
       LEFTOVER_MAP_PLOT_POST_ACTION,
     );
+    expect(leftoverMapComparePlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
+      LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN,
+    );
     expect(leftoverMapComparePlotPostBadge("Public post", 0.5, 0.1)?.key).not.toBe(
       leftoverMapPlotPostBadge("Public post", 0.5, 0.1)?.key ?? "",
     );
diff --git a/frontend/src/leftoverMapPlotLayout.ts b/frontend/src/leftoverMapPlotLayout.ts
index 0f34a8d66..fcc0343b3 100644
--- a/frontend/src/leftoverMapPlotLayout.ts
+++ b/frontend/src/leftoverMapPlotLayout.ts
@@ -167,6 +167,10 @@
  *  person coordinates through leftoverMapPlotPostBadge independently of leftover-map
  *  criterion leftover-map item coordinates ζ, not leftover-map comparison graphic leftover-map post leftover-map
  *  person coordinates.
+ *  ADR 0349 fail-closes leftover-map comparison graphic leftover-map post leftover-map origin leftover-map
+ *  person coordinates through leftoverMapComparePlotPostBadge independently of leftover-map
+ *  graphic leftover-map post leftover-map origin leftover-map person coordinates ξ, not leftover-map graphic leftover-map post leftover-map
+ *  person coordinates.
  */
 
 import { formatLeftoverMapCoordinatePair, leftoverMapPlotCoordinatePairIsOrigin } from "./leftoverMapCoordinates";
@@ -205,6 +209,9 @@ export const LEFTOVER_MAP_PLOT_POST_ACTION_OMITTED =
 export const LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION =
   "Open leftover map comparison graphic leftover-map post {title} at ξ {person}";
 
+export const LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN =
+  "Open leftover map comparison graphic leftover-map post {title} at leftover-map origin ξ {person}";
+
 export const LEFTOVER_MAP_PLOT_CRITERION =
   "leftover-map criterion {label} at ζ {item}";
 
@@ -277,7 +284,11 @@ export function leftoverMapComparePlotPostBadge(
   if (person === null) {
     return null;
   }
-  return { key: LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION, values: { title, person } };
+  const origin = leftoverMapPlotCoordinatePairIsOrigin(person);
+  return {
+    key: origin ? LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION_ORIGIN : LEFTOVER_MAP_COMPARE_PLOT_POST_ACTION,
+    values: { title, person },
+  };
 }
 
 export const LEFTOVER_MAP_PLOT_TICK =
diff --git a/pyproject.toml b/pyproject.toml
index e4f8a7808..165418469 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "lineageweave"
-version = "2.105.0"
+version = "2.106.0"
 description = "Reconstructs git-branch-style lineage DAGs from scattered short records using multi-channel score fusion and LLM adjudication."
 readme = "README.md"
 license = { text = "MIT" }