docs: #113 closed (attribution + fix) + #112 residual resolved in ISSUES.md

#113 moved to Recently closed: the phantom staircase was the Holtburg
meeting hall (AAB3, not A9B3) interior stair cells drawn unclipped from
outside - the PView shell clip was routed but never GL-enabled (927fd8f).
Misplaced-cell hypothesis refuted with dat evidence. #112 residual
paragraph updated: retail straddle gate live-binary verified + ported
(414c3de); at-doorway demote is retail-faithful, deep gaps now keep-curr.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/ISSUES.md

@@ -3749,61 +3749,75 @@ adjacent-claim shape self-heals, dat-tested) then retail keep-curr. Poisoned
 saves stay covered at the snap (#107/#111 AdjustPosition). P1 retail-golden
 gates explicitly green (11/11).
 
-**RESIDUAL (documented by
+**RESIDUAL RESOLVED 2026-06-10 (`414c3de`, live-binary oracle):** retail's
-`Issue112MembershipTests.A9B3CottageGap_..._DocumentsResidual`):** at the
+gate read straight from the running 2013 client (cdb attach,
-doorway-region gap itself, the NORMAL outdoor-candidate path still demotes
+`CEnvCell::find_transit_cells` @ 0052c820 — BN pseudo-C had invented
-(the BFS reaches the exterior portal → outdoor cells enter the array). Open
+portal_side tests in this branch): outdoor cells are admitted IFF a path
-oracle read: retail's `add_all_outside_cells` gate in
+sphere STRADDLES an exterior portal's polygon plane,
-`CEnvCell::find_transit_cells` (pc:317499 region) — sphere-proximity to the
+`|dist| < radius + F_EPSILON(0.0002)`. Ported as the straddle gate on the
-exterior portal polygon vs mere graph reachability. If proximity-gated, the
+membership PICK's outdoor branch; the collision cell SET keeps the A6.P5
-at-door demote disappears and the DocumentsResidual assert flips to keep-curr.
+topology widening until #99/A6.P4 (outdoor-registered doors must stay
-Re-promotion at doorway cells works (retail-identical), so the demote now
+findable from indoors). Consequences: (a) the at-doorway gap demote is
-self-heals walking in — no stranding. Live gate pending: user re-walks the
+RETAIL-FAITHFUL (gap point 0.23 m from 0x104's door plane < 0.48 m foot
-A9B3 cottage; expect interior to stay rendered (brief doorway flicker at most).
+radius → retail straddles + demotes + self-heals inward) — test renamed
-The missing OBJECT collision in that cottage = #99 data point (A6.P4 debt).
+`...DemotesRetailFaithfully`, expectation unchanged; (b) deep-interior
-Scan data: standing-now → [0x103]; flip-a → []; flip-b → [0x100].
+containment gaps in ANY house now keep-curr like retail instead of demoting
+(new pins: `A9B3Cottage_GapBeyondStraddleDistance_KeepsCurrCell` +
+`FindTransitCellsSphere_ExitPortalStraddleGate_MatchesRetail`). Live gate
+pending: user re-walks the A9B3 cottage; expect interior to stay rendered
+(brief doorway flicker at most). The missing OBJECT collision in that
+cottage = #99 data point (A6.P4 debt). Scan data: standing-now → [0x103];
+flip-a → []; flip-b → [0x100].
 
 ---
 
-## #113 — Phantom exterior staircase on an A9B3 building (not in retail); suspect misplaced interior cell
-
-**Status:** OPEN
-**Severity:** MEDIUM (visual fidelity; suspect shares a root with the same
-building's containment gap #112 and collision gaps #99)
-**Filed:** 2026-06-10 (late — user side-by-side vs retail)
-**Component:** render / building cells (or dat interpretation)
-
-**Symptom:** an A9B3 building (near the #112 hill cottage; NPCs Aun Kielerea +
-The Sentry nearby, spot ~(183, −111, 116) world) shows a stone-and-wood
-STAIRCASE attached to its exterior wall in acdream; the retail client shows a
-plain wall with a window there (user screenshots, 2026-06-10). The stairs are
-NOT pickable (clicks select only NPCs behind them) ⇒ not a stab/WorldEntity —
-building-shell or interior-cell geometry.
-
-**Hypothesis (would unify three symptoms at this building):** a misplaced
-interior EnvCell — an indoor staircase cell whose world transform puts its
-geometry outside the shell. That would simultaneously explain (a) the phantom
-exterior stairs, (b) the interior containment gap (#112's dead zone = a cell
-volume sitting in the wrong place), and (c) missing collision on objects in
-the house.
-
-**Next steps:** (1) ACViewer oracle — open the same landblock; stairs present
-there ⇒ shared dat-interpretation, absent ⇒ our transform/draw
-(feedback_acviewer_as_oracle). (2) Offline: dump A9B3's LandBlockInfo
-buildings + per-cell Position.Origin/rotation; look for a cell whose
-transformed AABB escapes the building footprint. (3) Identify the building id
-(the landblock's building list near the spot).
-
-**Meta (user, 2026-06-10):** "we should not have to verify all houses like
-this" — agreed; the open systemic debts are A6.P4 per-cell shadows (#99,
-fixes collision everywhere), the #112 residual oracle read, and this transform
-check. If (2) finds a systematic per-building transform error, ONE fix covers
-every affected house.
-
 ---
 
 # Recently closed
 
+## #113 — Phantom exterior staircase (Holtburg meeting hall): PView shell clip was never GL-enabled — [FIXED 2026-06-10 · 927fd8f, user visual gate pending]
+
+**Status:** FIXED (self-gated by screenshot comparison at the original spot —
+phantom gone; formal user visual gate pending)
+**Closed:** 2026-06-10
+**Component:** render (PView shell pass GL state)
+
+**Attribution (dat-evidenced — the filed "A9B3 misplaced interior cell"
+hypothesis is REFUTED):** the building is the Holtburg MEETING HALL — AAB3
+building[0], model `0x010014C3` at AAB3-local (36,84,116), not an A9B3
+building (A9B3 has exactly ONE building, the #112 hill cottage; the user
+stood at the A9B3/AAB3 boundary — `issue112-gate1.log` cell-transit trail —
+and clicked through the hall to the NPC behind it). The hall's interior
+stair cells (0x100..0x106, a ring climbing z 116→124.5 to the deck hatch)
+have geometry COINCIDENT with the shell's west wall (both at local x=29.0).
+
+**Root cause:** retail clips drawn CELL geometry to the accumulated portal
+view (`Render::set_view` :343750 + `planeMask=0xffffffff` per cell polygon
+:427922 → `polyClipFinish`). Our equivalent — `UseShellClipRouting` →
+`mesh_modern.vert` `gl_ClipDistance` — was routed with CORRECT tight clip
+regions (`Issue113MeetingHallFloodTests` proves 4–6 planes, door-aperture
+NDC boxes) but was INERT: `gl_ClipDistance` writes are ignored unless
+`GL_CLIP_DISTANCEi` is enabled, and no caller ever enabled it for the shell
+pass (born inert in `1405dd8`). Flooded interior cells drew WHOLE → the
+interior staircase painted across the exterior wall; unpickable because
+it's cell geometry. 5th instance of
+`feedback_render_self_contained_gl_state`.
+
+**Fix (`927fd8f`):** enable `GL_CLIP_DISTANCE0..7` around exactly the shell
+pass in `RetailPViewRenderer.DrawEnvCellShells` (no early-outs between set
+and restore). Entities/characters stay unclipped (retail's mesh path is
+viewcone-check, not poly-clip — comment scoped). Known remaining
+approximation: slot-0 fallback slices (>8-plane apertures) still draw
+pass-all — the assembler's scissor fallback remains unimplemented (rare;
+pinned 0 such slices at the hall).
+
+**Refuted along the way (evidence in `Issue113PhantomStairsDumpTests`):**
+the unifying misplaced-cell hypothesis — all 17 A9B3 cottage cells share
+one identical dat Position (nothing to misplace); the #112 gap is a real
+20 cm doorway micro-gap, not a displaced volume; missing object collision
+remains #99/A6.P4. A9B3's dat has NO stair geometry anywhere near the spot
+(shell = balcony slabs z119 + turret roof; cells flat 116/118.8).
+
 ## #111 — ACE-mutated indoor restores: transparent interior / wrong placement at login — [DONE 2026-06-10 · 5f1eb7c + 5706e0e + 2735695]
 
 **Status:** DONE (user-gated: clean indoor logins at two different buildings —