feat(reports): leftover-map coordinate ticks (v2.27.0)

AGENTS.md

@@ -273,7 +273,7 @@ stops startup instead of leaving a healthy-looking partial schema, and
 application code must not compensate for a missing table.
 
 Period leftover pairs (ADR 0017 / 0018 / 0048 / 0049 / 0119 / 0158 / 0162 /
-0163 / 0164 / 0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269) are computed in `lineageweave/leftover_pairs.py` from the
+0163 / 0164 / 0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269 / 0270) are computed in `lineageweave/leftover_pairs.py` from the
 residual after a real GRM/GPCM score, never invented. Distances are
 Euclidean on the two-dimensional Gabriel leftover map; missing cells stay
 out of the factorization. Closest and farthest post–criterion pairs
@@ -294,7 +294,11 @@ buttons; omit the plot when coordinates are missing; click a post
 marker to open that post. ADR 0269 captions those leftover-map axes
 with persisted leftover-map axis share `σ_k² / Σ_j σ_j²` when finite,
 including rank-0 zero-share axes; a missing or non-finite share omits
-that axis badge and keeps the existing leftover-map axis text. When `R`, `R̂`, `U`, `x`,
+that axis badge and keeps the existing leftover-map axis text. ADR 0270
+ticks leftover-map axes at the origin and at each unique finite
+persisted `ξ` / `ζ` coordinate so the pair-row badge matches the
+plot; rank-0 unused axes name only `0` and do not invent drawing-scale
+ticks. When `R`, `R̂`, `U`, `x`,
 `s`, and `e` are finite, `e + s + x = 1`. When coordinates,
 reconstruction, and distance are finite, `R̂ = ξ · ζ` and
 `d = ‖ξ − ζ‖`. The pairs sit above the member

ARCHITECTURE.md

@@ -637,14 +637,16 @@ information at the group's mean θ (Lord, 1980 max-info CAT). Rankings
 persist to `report_item_information`. After those IRT main effects,
 residual SVD leftover pairs on two Gabriel axes (Jeon et al., 2021;
 ADR 0017 / 0048 / 0049 / 0119 / 0148 / 0158 / 0162 / 0163 / 0164 / 0168 /
-0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269) persist to `report_leftover_pair` with signed residual `R`,
+0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269 / 0270) persist to `report_leftover_pair` with signed residual `R`,
 observed `Y`, expected `E[Y|θ, item]`, full leftover-map rank, unexplained
 leftover, ADR 0201 reconstruction evidence, ADR 0185 cross-share evidence,
 ADR 0233 unexplained leftover share `s`, ADR 0266 explained leftover
 share `e`, and ADR 0267 leftover-map coordinates `ξ_{1:2}` / `ζ_{1:2}`.
 ADR 0268 draws those persisted coordinates as the leftover-map graphic
 display above the pair buttons. ADR 0269 captions leftover-map axes 1
-and 2 with persisted leftover-map axis share. Click a post marker or a pair button
+and 2 with persisted leftover-map axis share. ADR 0270 ticks those
+leftover-map axes at persisted `ξ` / `ζ` coordinates so the pair-row
+badge matches the plot. 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
 (Gabriel inertia of residual SVD axes 1 and 2; ADR 0148) persists to

CHANGELOG.d/2.27.0-leftover-map-coordinate-ticks.md

@@ -0,0 +1,11 @@
+## 2.27.0 — Leftover-map coordinate ticks on the graphic display
+
+- Caption leftover-map graphic-display axes with persisted leftover-map
+  coordinate ticks (ADR 0270). After `make seed`, closest and farthest
+  leftover pairs sit above the member list with the Gabriel biplot of
+  already-named coordinates, leftover-map axis share when finite, and
+  axis ticks that match `ξ (x, y) ζ (x, y)` on the pair row; click a
+  post marker or a pair button opens that post. Origin is always named
+  `0`. Rank-0 unused axes do not invent `−1` / `+1` drawing-scale
+  ticks. Never invent a leftover score. Never invent a theta. No new
+  columns.

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 graphic-display axes
+  with persisted leftover-map coordinate ticks (ADR 0270 / v2.27.0).
+  After `make seed`, closest and farthest leftover pairs sit above the
+  member list with the Gabriel biplot of already-named coordinates,
+  leftover-map axis share when finite, and axis ticks that match
+  `ξ (x, y) ζ (x, y)` on the pair row; click a post marker or a pair
+  button opens that post. Origin is always named `0`. Rank-0 unused
+  axes do not invent `−1` / `+1` drawing-scale ticks. Never invent a
+  leftover score or a theta. No new columns.
+
 - Period leftover pairs now caption leftover-map graphic-display axes
   with persisted leftover-map axis share `σ_k² / Σ_j σ_j²` (ADR 0269 /
   v2.26.0). After `make seed`, closest and farthest leftover pairs sit

CLAUDE.md

@@ -49,7 +49,7 @@ cutoff. Global Ask optional `knowledge_cutoff` uses the same cover
 
 Create/start endpoint rules (ADR 0017 / 0021), tie-vs-miss similarity
 (ADR 0026), R&R catalog ids (ADR 0019 / 0027), leftover pairs
-(ADR 0048–0164 / 0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269), occupational construct catalog search
+(ADR 0048–0164 / 0182 / 0185 / 0201 / 0233 / 0266 / 0267 / 0268 / 0269 / 0270), occupational construct catalog search
 (ADR 0257), the text-channel embedding swap and cosine
 clamp (ADR 0190), per-edge channel-score persistence (ADR 0195),
 token-backed status notices (ADR 0220),

docs/adr/0048-persist-lsirm-leftover-pairs.md

@@ -12,7 +12,8 @@
 [ADR 0266](0266-leftover-map-explained-share.md) (explained leftover share e);
 [ADR 0267](0267-leftover-map-coordinates.md) (leftover-map coordinates ξ, ζ);
 [ADR 0268](0268-leftover-map-graphic-display.md) (leftover-map graphic display);
-[ADR 0269](0269-leftover-map-axis-share-plot.md) (leftover-map axis share on the graphic display)
+[ADR 0269](0269-leftover-map-axis-share-plot.md) (leftover-map axis share on the graphic display);
+[ADR 0270](0270-leftover-map-coordinate-ticks.md) (leftover-map coordinate ticks)
 
 ## Context
 
@@ -69,7 +70,8 @@ reconstruction `R̂ = ξ · ζ` and distance `d = ‖ξ − ζ‖` stay auditabl
 from the pair row. ADR 0268 draws those persisted coordinates as the
 leftover-map graphic display; it adds no columns. ADR 0269 captions
 those leftover-map axes with persisted leftover-map axis share; it
-adds no columns.
+adds no columns. ADR 0270 ticks leftover-map axes at persisted `ξ` /
+`ζ` coordinates; it adds no columns.
 
 Cascade the rows with `report_period_score`. A leftover post must
 also be a `report_member_score` row, and the leftover criterion

docs/adr/0049-leftover-pair-report-ui.md

@@ -13,7 +13,8 @@
 [ADR 0266](0266-leftover-map-explained-share.md) (explained leftover share e);
 [ADR 0267](0267-leftover-map-coordinates.md) (leftover-map coordinates ξ, ζ);
 [ADR 0268](0268-leftover-map-graphic-display.md) (leftover-map graphic display);
-[ADR 0269](0269-leftover-map-axis-share-plot.md) (leftover-map axis share on the graphic display)
+[ADR 0269](0269-leftover-map-axis-share-plot.md) (leftover-map axis share on the graphic display);
+[ADR 0270](0270-leftover-map-coordinate-ticks.md) (leftover-map coordinate ticks)
 
 ## Context
 
@@ -39,7 +40,8 @@ leftover-map cross share next to distance when finite. When four finite
 coordinates exist, the leftover-map graphic display of those positions
 sits above the pair buttons (ADR 0268); click a post marker to open
 that post. Leftover-map axis share captions those leftover-map axes
-when finite (ADR 0269). The pair renders every available finite measurement.
+when finite (ADR 0269). Leftover-map axis ticks name persisted `ξ` /
+`ζ` coordinates (ADR 0270). The pair renders every available finite measurement.
 The next action uses the first available value in the priority below; no
 amendment hides another badge, rank 0
 explicitly names no leftover structure, and unexplained leftover names
@@ -66,6 +68,10 @@ Leftover-map coordinate naming is
 [ADR 0267](0267-leftover-map-coordinates.md).
 Leftover-map graphic display is
 [ADR 0268](0268-leftover-map-graphic-display.md).
+Leftover-map axis share on the graphic display is
+[ADR 0269](0269-leftover-map-axis-share-plot.md).
+Leftover-map coordinate ticks are
+[ADR 0270](0270-leftover-map-coordinate-ticks.md).
 
 After `make seed`, closest and farthest leftover pairs sit above the
 member list. Click a pair to open that post with the leftover

docs/adr/0267-leftover-map-coordinates.md

@@ -4,15 +4,19 @@
 **Date:** 2026-08-28
 
 **Amended by:** [ADR 0268](0268-leftover-map-graphic-display.md)
-(leftover-map graphic display)
+(leftover-map graphic display);
+[ADR 0270](0270-leftover-map-coordinate-ticks.md)
+(leftover-map coordinate ticks)
 
 Amends [ADR 0048](0048-persist-lsirm-leftover-pairs.md),
 [ADR 0049](0049-leftover-pair-report-ui.md), and
 [ADR 0201](0201-leftover-map-reconstruction.md). Builds on ADR 0201's
 leftover-map reconstruction. Coordinate publication is independent of the
 explained leftover share ([ADR 0266](0266-leftover-map-explained-share.md)),
-and leftover-map unexplained leftover share
-([ADR 0233](0233-leftover-map-unexplained-share.md)).
+leftover-map unexplained leftover share
+([ADR 0233](0233-leftover-map-unexplained-share.md)), and leftover-map
+axis share on the graphic display
+([ADR 0269](0269-leftover-map-axis-share-plot.md)).
 
 ## Context
 
@@ -104,8 +108,8 @@ leftover-map distance, leftover-map rank, leftover-map inner product,
 leftover-map cosine, leftover-map length, leftover-map reconstruction,
 leftover-map unexplained leftover, leftover-map cross share,
 leftover-map unexplained leftover share, leftover-map explained
-leftover share, leftover-map graphic display, and leftover-map axis
-share on the graphic display.
+leftover share, leftover-map graphic display, leftover-map axis
+share on the graphic display, and leftover-map coordinate ticks.
 
 ## References
 

docs/adr/0268-leftover-map-graphic-display.md

@@ -4,7 +4,9 @@
 **Date:** 2026-08-28
 
 **Amended by:** [ADR 0269](0269-leftover-map-axis-share-plot.md)
-(leftover-map axis share on the graphic display)
+(leftover-map axis share on the graphic display);
+[ADR 0270](0270-leftover-map-coordinate-ticks.md)
+(leftover-map coordinate ticks)
 
 Amends [ADR 0049](0049-leftover-pair-report-ui.md) and
 [ADR 0267](0267-leftover-map-coordinates.md). Independent of leftover-map
@@ -77,7 +79,8 @@ After `make seed`, closest and farthest leftover pairs sit above the
 member list with the leftover-map graphic display of persisted `ξ`
 and `ζ`; click a post marker or a pair button opens that post.
 Hidden posts stay hidden. Leftover-map axis share captions those
-leftover-map axes when finite (ADR 0269). When coordinates, reconstruction, and
+leftover-map axes when finite (ADR 0269). Leftover-map axis ticks name
+persisted `ξ` / `ζ` coordinates (ADR 0270). When coordinates, reconstruction, and
 distance are all finite, `R̂ = ξ_{1:2} · ζ_{1:2}` and
 `d = ‖ξ_{1:2} − ζ_{1:2}‖` remain the same identities already
 persisted by ADR 0267.
@@ -92,8 +95,8 @@ leftover-map distance, leftover-map rank, leftover-map inner product,
 leftover-map cosine, leftover-map length, leftover-map reconstruction,
 leftover-map unexplained leftover, leftover-map cross share,
 leftover-map unexplained leftover share, leftover-map explained
-leftover share, leftover-map coordinate persistence, and leftover-map
-axis share on the graphic display.
+leftover share, leftover-map coordinate persistence, leftover-map
+axis share on the graphic display, and leftover-map coordinate ticks.
 
 ## References
 

docs/adr/0269-leftover-map-axis-share-plot.md

@@ -9,6 +9,8 @@ explained leftover share ([ADR 0266](0266-leftover-map-explained-share.md)),
 leftover-map unexplained leftover share ([ADR 0233](0233-leftover-map-unexplained-share.md)),
 leftover-map reconstruction ([ADR 0201](0201-leftover-map-reconstruction.md)),
 and leftover-map coordinates ([ADR 0267](0267-leftover-map-coordinates.md)).
+Independent of leftover-map coordinate ticks
+([ADR 0270](0270-leftover-map-coordinate-ticks.md)).
 
 ## Context
 
@@ -78,8 +80,8 @@ strip, two-axis leftover-map distance, leftover-map rank, leftover-map
 inner product, leftover-map cosine, leftover-map length, leftover-map
 reconstruction, leftover-map unexplained leftover, leftover-map cross
 share, leftover-map unexplained leftover share, leftover-map explained
-leftover share, leftover-map coordinate persistence, and leftover-map
-graphic display.
+leftover share, leftover-map coordinate persistence, leftover-map
+graphic display, and leftover-map coordinate ticks.
 
 ## References
 

docs/adr/0270-leftover-map-coordinate-ticks.md

@@ -0,0 +1,106 @@
+# ADR 0270 — Name leftover-map coordinates as graphic-display axis ticks
+
+**Decision status:** Accepted
+**Date:** 2026-08-29
+
+Amends [ADR 0268](0268-leftover-map-graphic-display.md) and
+[ADR 0267](0267-leftover-map-coordinates.md). Independent of leftover-map
+axis share on the graphic display
+([ADR 0269](0269-leftover-map-axis-share-plot.md)), leftover-map
+explained leftover share ([ADR 0266](0266-leftover-map-explained-share.md)),
+leftover-map unexplained leftover share
+([ADR 0233](0233-leftover-map-unexplained-share.md)), leftover-map
+reconstruction ([ADR 0201](0201-leftover-map-reconstruction.md)), and
+leftover-map axis share persistence ([ADR 0148](0148-leftover-map-axis-share.md)).
+
+## Context
+
+ADR 0267 already persists two-axis Gabriel person coordinates
+`ξ_{1:2}` and item coordinates `ζ_{1:2}` on leftover pair rows so
+`R̂ = ξ_{1:2} · ζ_{1:2}` and `d = ‖ξ_{1:2} − ζ_{1:2}‖` stay
+auditable. ADR 0268 already draws those positions. ADR 0269 captions
+leftover-map axes with persisted Gabriel inertia share. The plot still
+has no coordinate scale, so a buyer who reads `ξ (x, y) ζ (x, y)` on
+the pair row cannot match those numbers to leftover-map location.
+Hiding ticks lets leftover residual `R`, leftover-map distance `d`, or
+reconstruction `R̂` be read as leftover-map location even after the
+coordinates themselves are named and plotted.
+
+This increment names leftover-map graphic-display axes with persisted
+coordinate ticks. It does not add columns. It does not persist
+leftover-map inner product, cosine, or length. It does not land Post
+quality on the leftover criterion. Leftover-map distance stays
+two-axis Euclidean. Do not invent a leftover score. Do not invent a
+theta.
+
+The dashboard stack already used neighbouring leftover facts under
+other numbers. This protected increment uses **0270** so it does not
+collide with leftover-map axis share on the graphic display (0269),
+leftover-map graphic display (0268), leftover-map coordinates (0267 /
+migration 0245), leftover-map explained leftover share (0266 /
+migration 0244), leftover-map unexplained leftover share (0233 /
+migration 0233), leftover-map reconstruction (0201 / migration 0206),
+leftover-map cross share (0185), leftover residual disclosure,
+leftover observed `Y` / expected `E`, leftover-map rank, two-axis
+leftover-map distance, leftover coverage, leftover-map axis share
+persistence (0148), leftover interaction-map persistence, occupational
+construct catalog search (0265), or the dashboard stacks.
+
+## Decision
+
+On the leftover-map graphic display, tick leftover-map axis 1 and
+leftover-map axis 2 at the origin and at each unique finite persisted
+`ξ` / `ζ` coordinate projected onto that axis. Tick labels use the
+same signed leftover-map coordinate formatter as the pair-row badge.
+The origin is always named `0` because it is the rank-0 unused-axis
+location, not a leftover score. Duplicate coordinates share one tick.
+A rank-0 origin cell names only `0`; the unit drawing window used to
+keep that origin visible is drawing scale and must not sprout `−1` or
+`+1` ticks. Do not invent evenly spaced ticks that no persisted
+coordinate occupies. Click a post marker to open that post. Criterion
+markers are not post buttons. The grouping comparison strip
+(ADR 0149) stays on its reduced leftover payload and does not gain
+these ticks.
+
+Do not add SQL. Do not edit shipped migrations. Do not persist inner
+product, cosine, or length as separate columns. Do not invent a
+leftover score. Do not invent a theta.
+
+## Consequences
+
+After `make seed`, closest and farthest leftover pairs sit above the
+member list with the leftover-map graphic display of persisted `ξ`
+and `ζ`, leftover-map axes name persisted Gabriel inertia share when
+finite, and leftover-map axis ticks name the same coordinates shown
+on the pair row; click a post marker or a pair button opens that
+post. Hidden posts stay hidden. Rank-0 unused axes still plot at the
+origin and still name zero leftover-map axis share with a `0` tick.
+When coordinates, reconstruction, and distance are all finite,
+`R̂ = ξ_{1:2} · ζ_{1:2}` and `d = ‖ξ_{1:2} − ζ_{1:2}‖` remain the
+same identities already persisted by ADR 0267.
+
+## Related
+
+Independent of leftover interaction-map persistence, leftover-criterion
+evaluation landing, leftover residual disclosure, leftover observed
+`Y` / expected `E`, leftover-map complete-case coverage, leftover-map
+axis share persistence, leftover pairs on the grouping comparison
+strip, two-axis leftover-map distance, leftover-map rank, leftover-map
+inner product, leftover-map cosine, leftover-map length, leftover-map
+reconstruction, leftover-map unexplained leftover, leftover-map cross
+share, leftover-map unexplained leftover share, leftover-map explained
+leftover share, leftover-map coordinate persistence, leftover-map
+graphic display, and leftover-map axis share on the graphic display.
+
+## 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.)

docs/product-technical-gap-baseline.md

@@ -1,5 +1,26 @@
 # Product & Technical Gap Baseline
 
+> Exact-head loop overlay: 2026-08-29 13:15 KST. Protected `main` is
+> `fc13acaa20adca11968238e398d4aafcf62b6cee` (v2.23.0 leftover-map
+> explained leftover share, #775). Open ready PRs still lack independent
+> APPROVE. #782 leftover-map coordinates + graphic display + axis share
+> (v2.24.0 / v2.25.0 / v2.26.0 / ADR 0267 / ADR 0268 / ADR 0269) is on
+> `4a0afbf4804d9862bba58869db20ccdfb0a0b37e`; Strix fail-closed and no
+> independent APPROVE. Auto-merge squash remains armed on
+> #782/#780/#774/#772/#771/#770. Drafts remain dirty against `main`.
+> #96 stays closed as a weaker duplicate of #91. GitHub writes through
+> `gh`/MCP succeed (comment/create-branch/auto-merge). `git push` HTTPS
+> still fails (empty `X-OAuth-Scopes`). Copilot review is not
+> independent APPROVE. Do not self-approve.
+>
+> Next buyer increment on this cycle: leftover-map coordinate ticks
+> (ADR 0270 / v2.27.0). Tick leftover-map axes at the origin and at each
+> unique finite persisted `ξ` / `ζ` so pair-row `ξ (x, y) ζ (x, y)`
+> matches the graphic. UI-only; no new columns. Rank-0 unused axes name
+> only `0` and do not invent drawing-scale `−1` / `+1` ticks. Do not
+> invent leftover scores. Do not mix into #782; stack onto leftover
+> branch `feat/leftover-map-coordinates-v2240`.
+
 > Exact-head loop overlay: 2026-08-28 19:15 KST. Protected `main` is
 > `fc13acaa20adca11968238e398d4aafcf62b6cee` (v2.23.0 leftover-map
 > explained leftover share, #775). Open ready PRs still lack independent