diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72019bd6b..90abb0716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,18 +36,9 @@
 
 - Director timeline seeks cross the dateline along the short longitude arc.
 
-- Map state updates stop delivering to subscribers removed during the same notification.
+- Recent Imagery continues past malformed records in full catalog pages, respects the requested record limit, and reports results as truncated when that limit drops valid records.
 
-- Director assets cancelled during the final stream read are discarded with reader cleanup.
-
-- Analyst queries preserve useful rows when an upstream timestamp is outside the supported date range.
-
-- Fire detections with missing or impossible positions are skipped while genuine zero coordinates remain valid.
-
-- Frequently reused terrain batches retain their cached heights ahead of unused cells.
-
-- Recent Imagery’s exported `setBox` and `searchHls` reject missing, blank or
-  boolean programmatic box edges instead of interpreting them as zero coordinates.
+- Regional articles retain unknown publication times when compact source dates do not identify a real calendar instant.
 
 - Treat explicitly current, complete empty vessel coverage as a successful update,
   clearing obsolete contacts while retaining stale or incomplete snapshots.
diff --git a/docs/CURRENT-STATE.md b/docs/CURRENT-STATE.md
index c12f81684..c72cb93e3 100644
--- a/docs/CURRENT-STATE.md
+++ b/docs/CURRENT-STATE.md
@@ -101,6 +101,10 @@ lists at 25 rows by default. Voice offers the same queries next to its app
 actions: the session lists them, and the browser runs them through the same
 catalog, loaded on first use. See [tools and the MCP server](TOOLS.md).
 
+Catalog calls check their cancellation signal immediately before executing a
+tool. Already-cancelled queries do not start; cancellation after execution starts
+continues to follow the existing tool and caller behavior.
+
 ## Cyber HUD — September 30, 2026
 
 Display > HUD > Layout includes Cyber, also available through the HUD voice
@@ -1090,6 +1094,9 @@ collapse can still be undone.
 
 ## Surface keyboard lifecycle
 
+Surface Tab cycling excludes controls with a negative tabindex, native disabled
+state or inert ancestry; ordinary visible enabled controls retain their order.
+
 `ui/surfaces` owns the capture-phase keyboard listener, Tab cycling and return
 focus shared by the first-run launcher and Provider Settings. Each caller
 activates it while open and deactivates it on dismissal; destruction releases
@@ -1173,7 +1180,9 @@ stalled downloads are cancelled. Development and preview use the same handler.
 Overpass query validation, geometry simplification, disk caching and upstream
 transport now have separate modules; military-installation search reuses that
 transport. Regional briefing combines separate place, news and weather sources,
-while weather effects uses only the weather source. Existing process-scoped
+while weather effects uses only the weather source.
+GDELT compact dates that do not name a real calendar instant keep the article
+with an unknown publication time. Existing process-scoped
 caches, rate limits, stale fallbacks and route ordering are preserved.
 
 Local voice has separate HUD-summary, debug-log and Realtime-token handlers,
@@ -1202,6 +1211,11 @@ a browser key. Preview is for local build verification, not a production server.
 
 ## CCTV and radio provider modules
 
+CCTV direction text resolves travel tokens first, then intercardinals, then
+bare cardinals when enabled. Only conflicting headings within the highest
+matching tier remain unknown; street quadrants and lower-tier words do not
+cancel an explicit travel heading.
+
 CCTV catalog acquisition, source normalization and frame/media delivery now live
 in separate modules. Each CCTV factory owns its catalog and health state; its
 `sourceRoot` option resolves relative source files against the application root.
@@ -1222,6 +1236,10 @@ The browser layers and their rendering remain in their existing modules.
 
 ## Terrain height cache bound
 
+The terrain proxy parser rejects finite longitudes outside [-180, 180] and
+latitudes outside [-90, 90] for every client before upstream resolution. One
+out-of-range point rejects the whole batch; inclusive WGS84 bounds remain valid.
+
 The client terrain-height resolver's in-memory cache is bounded at 20 000
 entries (`DEFAULT_MAX_CACHE_ENTRIES`, overridable per instance through
 `createTerrainHeights({ maxCacheEntries })`). Coordinate rounding makes repeated
@@ -1459,7 +1477,7 @@ accessible name remains "Don't show this again". Control behavior is unchanged.
 
 ## FIRMS source status
 
-FIRMS ingestion and adaptation require explicit finite coordinates within WGS84 ranges; genuine zero coordinates remain valid and admitted detection indices stay sequential.
+The FIRMS CSV parser rejects impossible acquisition calendar dates before the proxy filters records to the trailing 24 hours, while retaining valid UTC acquisition times.
 
 The FIRMS proxy records source success after appending its rows. If aggregation
 throws, that source reports failure without a contradictory success entry.
@@ -4128,7 +4146,8 @@ when its own signal aborts.
 Configured endpoints have per-instance cooldowns for 406/429, honoring
 Retry-After; absent delays back off from 30 seconds to five minutes. Empty
 `elements` is a valid answer. Existing byte, query, concurrency and cache caps
-remain. Consumer capability misses never schedule automatic retries.
+remain. Malformed capability-probe responses remain unknown and are retried after the existing 30-second backoff; valid configured decisions remain memoized.
+Consumer capability misses never schedule automatic retries.
 
 Operator-configured Overpass area and focus-footprint queries use body-level
 `out geom` (with `center` for focus), preserving relation member outlines.
@@ -4540,6 +4559,8 @@ are omitted rather than framing the wrong part of the globe.
 
 ### Recent Imagery (September 2026)
 
+CMR pagination counts raw rows when checking page completion and the record budget. A catalog is truncated when upstream hits exceed the rows examined or the record cap drops valid granules from the last page; discarded malformed rows do not imply unseen imagery.
+
 Programmatic boxes passed to the exported `setBox` and `searchHls` operations
 reject missing, blank or boolean edges instead of interpreting them as zero
 coordinates. Valid finite numeric edges remain accepted; the app’s drag tool,
diff --git a/src/annotations/annotationEngine.test.mjs b/src/annotations/annotationEngine.test.mjs
index d821106e0..5f39a077a 100644
--- a/src/annotations/annotationEngine.test.mjs
+++ b/src/annotations/annotationEngine.test.mjs
@@ -313,7 +313,9 @@ test('retry: a plain HTTP 500 still exhausts the existing 8s/25s transient ladde
   t.mock.timers.enable({ apis: ['setTimeout', 'Date'], now: 100_000 });
   globalThis.window = { setTimeout: globalThis.setTimeout, clearTimeout: globalThis.clearTimeout };
   const requestTimes = [];
-  globalThis.fetch = async () => {
+  globalThis.fetch = async (url) => {
+    if (String(url).endsWith('/status'))
+      return Response.json({ configured: true });
     requestTimes.push(Date.now());
     return httpFailure(500);
   };
diff --git a/src/data/ambiguous-camera-direction.test.mjs b/src/data/ambiguous-camera-direction.test.mjs
new file mode 100644
index 000000000..b5996d7a7
--- /dev/null
+++ b/src/data/ambiguous-camera-direction.test.mjs
@@ -0,0 +1,30 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { directionToHeading } from './directionText.js';
+test('conflicting facing directions cannot manufacture one heading', () => {
+  for (const bare of [false, true]) {
+    for (const value of ['NB / SB', 'EASTBOUND WESTBOUND', 'NE SW'])
+      assert.ok(Number.isNaN(directionToHeading(value, bare)), value);
+    assert.equal(directionToHeading('NB northbound', bare), 0);
+    assert.equal(directionToHeading('IH-35 SOUTHBOUND AT 15TH', bare), 180);
+  }
+  assert.ok(Number.isNaN(directionToHeading('North / East', true)));
+  assert.equal(directionToHeading('West / SR-24', true), 270);
+});
+
+test('travel tokens retain precedence over quadrant streets and bare words', () => {
+  for (const [text, heading] of [
+    ['I-5 NB at NE 45th St', 0],
+    ['SR 520 EB at NE 148th', 90],
+    ['US 13 SB @ SW Front St', 180],
+  ]) {
+    for (const bare of [false, true])
+      assert.equal(directionToHeading(text, bare), heading);
+  }
+  assert.equal(
+    directionToHeading('Hwy 401 east of Keele St - Westbound', true),
+    270,
+  );
+  assert.equal(directionToHeading('NE near West St', true), 45);
+  assert.ok(Number.isNaN(directionToHeading('NB SB near NE St', true)));
+});
diff --git a/src/data/directionText.js b/src/data/directionText.js
index 78f1be0df..eb78065d2 100644
--- a/src/data/directionText.js
+++ b/src/data/directionText.js
@@ -28,22 +28,34 @@ export function directionToHeading(value, allowBare = false) {
     .trim()
     .toUpperCase();
   if (!text) return NaN;
-  // Explicit travel/intercardinal forms — safe on free-form text (a street
-  // name almost never contains "NORTHBOUND" or a lone "NB" token).
-  if (/\bNORTHBOUND\b|\bNB\b/.test(text)) return 0;
-  if (/\bSOUTHBOUND\b|\bSB\b/.test(text)) return 180;
-  if (/\bEASTBOUND\b|\bEB\b/.test(text)) return 90;
-  if (/\bWESTBOUND\b|\bWB\b/.test(text)) return 270;
-  if (/\bNORTHEAST\b|\bNE\b/.test(text)) return 45;
-  if (/\bNORTHWEST\b|\bNW\b/.test(text)) return 315;
-  if (/\bSOUTHEAST\b|\bSE\b/.test(text)) return 135;
-  if (/\bSOUTHWEST\b|\bSW\b/.test(text)) return 225;
-  // Bare cardinals — dedicated direction fields only.
-  if (allowBare) {
-    if (/\bNORTH\b/.test(text)) return 0;
-    if (/\bSOUTH\b/.test(text)) return 180;
-    if (/\bEAST\b/.test(text)) return 90;
-    if (/\bWEST\b/.test(text)) return 270;
+  const tiers = [
+    [
+      [/\bNORTHBOUND\b|\bNB\b/, 0],
+      [/\bSOUTHBOUND\b|\bSB\b/, 180],
+      [/\bEASTBOUND\b|\bEB\b/, 90],
+      [/\bWESTBOUND\b|\bWB\b/, 270],
+    ],
+    [
+      [/\bNORTHEAST\b|\bNE\b/, 45],
+      [/\bNORTHWEST\b|\bNW\b/, 315],
+      [/\bSOUTHEAST\b|\bSE\b/, 135],
+      [/\bSOUTHWEST\b|\bSW\b/, 225],
+    ],
+  ];
+  if (allowBare)
+    tiers.push([
+      [/\bNORTH\b/, 0],
+      [/\bSOUTH\b/, 180],
+      [/\bEAST\b/, 90],
+      [/\bWEST\b/, 270],
+    ]);
+  for (const forms of tiers) {
+    const headings = new Set();
+    for (const [pattern, heading] of forms) {
+      if (pattern.test(text)) headings.add(heading);
+    }
+    if (headings.size)
+      return headings.size === 1 ? headings.values().next().value : NaN;
   }
   return NaN;
 }
diff --git a/src/data/firms-calendar-validity.test.mjs b/src/data/firms-calendar-validity.test.mjs
new file mode 100644
index 000000000..1ccaf7435
--- /dev/null
+++ b/src/data/firms-calendar-validity.test.mjs
@@ -0,0 +1,23 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { acquisitionMsUtc } from './firmsCsv.js';
+test('FIRMS acquisition dates cannot roll into a different calendar day', () => {
+  for (const [date, time] of [
+    ['2026-02-30', '1200'],
+    ['2026-04-31', '1200'],
+    ['2026-13-01', '1200'],
+    ['2026-07-16junk', '1200'],
+    ['2026-07-16', '2400'],
+    ['2026-07-16', '1260'],
+    ['2026-07-16', null],
+    ['2026-07-16', ''],
+  ]) {
+    assert.ok(Number.isNaN(acquisitionMsUtc(date, time)), `${date}:${time}`);
+  }
+  for (const [date, time, expected] of [
+    ['2024-02-29', '45', Date.UTC(2024, 1, 29, 0, 45)],
+    ['2026-07-16', '0', Date.UTC(2026, 6, 16)],
+  ]) {
+    assert.equal(acquisitionMsUtc(date, time), expected);
+  }
+});
diff --git a/src/data/firmsCsv.js b/src/data/firmsCsv.js
index aafeac50b..368ef4f73 100644
--- a/src/data/firmsCsv.js
+++ b/src/data/firmsCsv.js
@@ -163,7 +163,13 @@ export function acquisitionMsUtc(acqDate, acqTime) {
     minutes > 59
   )
     return NaN;
-  return Date.UTC(year, month - 1, day, hours, minutes);
+  const ms = Date.UTC(year, month - 1, day, hours, minutes);
+  const parsed = new Date(ms);
+  return parsed.getUTCFullYear() === year &&
+    parsed.getUTCMonth() === month - 1 &&
+    parsed.getUTCDate() === day
+    ? ms
+    : NaN;
 }
 
 /**
diff --git a/src/data/regional-calendar-evidence.test.mjs b/src/data/regional-calendar-evidence.test.mjs
new file mode 100644
index 000000000..a442a9feb
--- /dev/null
+++ b/src/data/regional-calendar-evidence.test.mjs
@@ -0,0 +1,43 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { normalizeRegionalArticles } from './regionalModel.js';
+test('compact source dates must denote an actual calendar instant', () => {
+  for (const date of [
+    '20260230T120000Z',
+    '20260431T120000Z',
+    '20261301T120000Z',
+    '20260716T240000Z',
+    '20260716T126000Z',
+    '20260716T120060Z',
+  ]) {
+    const [article] = normalizeRegionalArticles({
+      articles: [
+        {
+          title: 'Fixture',
+          url: 'https://fixture.example/news',
+          seendate: date,
+        },
+      ],
+    });
+    assert.equal(article.publishedAt, null, date);
+    assert.equal(article.title, 'Fixture');
+  }
+  for (const [input, expected] of [
+    ['20240229T004500Z', '2024-02-29T00:45:00Z'],
+    ['20260716T000000Z', '2026-07-16T00:00:00Z'],
+    ['2026-07-16T12:00:00Z', '2026-07-16T12:00:00.000Z'],
+  ]) {
+    assert.equal(
+      normalizeRegionalArticles({
+        articles: [
+          {
+            title: 'Fixture',
+            url: 'https://fixture.example/news',
+            seendate: input,
+          },
+        ],
+      })[0].publishedAt,
+      expected,
+    );
+  }
+});
diff --git a/src/data/regionalModel.js b/src/data/regionalModel.js
index 3a6d79f14..fca473994 100644
--- a/src/data/regionalModel.js
+++ b/src/data/regionalModel.js
@@ -67,11 +67,20 @@ export function normalizeRegionalArticles(payload, limit = MAX_ARTICLES) {
     seen.add(signature);
     const rawDate = cleanText(row?.seendate, 32);
     const compactDate = /^(\d{8})T(\d{6})Z$/.exec(rawDate);
-    const publishedAt = compactDate
+    const candidateDate = compactDate
       ? `${compactDate[1].slice(0, 4)}-${compactDate[1].slice(4, 6)}-${compactDate[1].slice(6, 8)}T${compactDate[2].slice(0, 2)}:${compactDate[2].slice(2, 4)}:${compactDate[2].slice(4, 6)}Z`
-      : Number.isNaN(Date.parse(rawDate))
-        ? null
-        : new Date(rawDate).toISOString();
+      : rawDate;
+    const parsedMs = Date.parse(candidateDate);
+    const validDate =
+      Number.isFinite(parsedMs) &&
+      (!compactDate ||
+        new Date(parsedMs).toISOString().slice(0, 19) ===
+          candidateDate.slice(0, 19));
+    const publishedAt = validDate
+      ? compactDate
+        ? candidateDate
+        : new Date(parsedMs).toISOString()
+      : null;
     articles.push({
       title,
       url,
diff --git a/src/data/terrainHeightsProxy.js b/src/data/terrainHeightsProxy.js
index bfb058693..9134f9ec6 100644
--- a/src/data/terrainHeightsProxy.js
+++ b/src/data/terrainHeightsProxy.js
@@ -35,7 +35,13 @@ export function parseTerrainPoints(raw) {
     if (parts.length !== 2) return null;
     const lon = Number(parts[0]);
     const lat = Number(parts[1]);
-    if (!Number.isFinite(lon) || !Number.isFinite(lat)) return null;
+    if (
+      !Number.isFinite(lon) ||
+      !Number.isFinite(lat) ||
+      Math.abs(lon) > 180 ||
+      Math.abs(lat) > 90
+    )
+      return null;
     points.push([lon, lat]);
   }
   return points;
diff --git a/src/data/terrainHeightsProxy.test.mjs b/src/data/terrainHeightsProxy.test.mjs
index f6b53de9a..50e45b732 100644
--- a/src/data/terrainHeightsProxy.test.mjs
+++ b/src/data/terrainHeightsProxy.test.mjs
@@ -3,6 +3,7 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import {
+  parseTerrainPoints,
   fetchTerrainChunkWithRetry,
   resolveTerrainHeightRequest,
   terrainPointKey,
@@ -227,3 +228,13 @@ test('malformed height objects remain refresh failures, not absent readings', as
     assert.equal(response.cacheChanged, false);
   }
 });
+
+test('terrain parser rejects out-of-range WGS84 points and accepts inclusive bounds', () => {
+  for (const value of ['181,0', '-181,0', '0,91', '0,-91', '1,2;0,91'])
+    assert.equal(parseTerrainPoints(value), null, value);
+  assert.deepEqual(parseTerrainPoints('-180,-90;180,90;0,0'), [
+    [-180, -90],
+    [180, 90],
+    [0, 0],
+  ]);
+});
diff --git a/src/layers/recentImagery/catalog.js b/src/layers/recentImagery/catalog.js
index 96b314690..14964b1d2 100644
--- a/src/layers/recentImagery/catalog.js
+++ b/src/layers/recentImagery/catalog.js
@@ -27,7 +27,8 @@ const CMR_SEARCH_AFTER = 'CMR-Search-After';
 /**
  * Read one product's granules across CMR pages, sending back each response's
  * `CMR-Search-After` cursor until a short page, a missing cursor or the
- * record cap ends the walk. `truncated` is measured against CMR's `hits`.
+ * record cap ends the walk. `truncated` means CMR's `hits` exceed the rows
+ * read, or the cap dropped valid granules from the last page read.
  * @param {{ product: string, url: string, fetchImpl: typeof fetch, signal?: AbortSignal, maxRecords?: number }} request
  * @returns {Promise<{ granules: Array<object>, truncated: boolean }>}
  */
@@ -40,6 +41,8 @@ export async function fetchCmrPages({
 }) {
   const granules = [];
   let hits = 0;
+  let readCount = 0;
+  let capped = 0;
   let cursor = null;
   for (;;) {
     const init = { signal };
@@ -47,19 +50,27 @@ export async function fetchCmrPages({
     const response = await fetchImpl(url, init);
     if (!response?.ok)
       throw new Error(`HTTP ${response?.status ?? 'error'} from CMR`);
-    const page = parseCmrUmm(await response.json(), product);
-    granules.push(...page.granules);
+    const json = await response.json();
+    const rawCount = Array.isArray(json?.items) ? json.items.length : 0;
+    const page = parseCmrUmm(json, product);
+    readCount += rawCount;
+    const admitted = page.granules.slice(
+      0,
+      Math.max(0, maxRecords - granules.length),
+    );
+    granules.push(...admitted);
+    capped += page.granules.length - admitted.length;
     hits = Math.max(hits, page.hits);
     cursor = response.headers?.get?.(CMR_SEARCH_AFTER) ?? null;
     if (
       !cursor ||
-      page.granules.length < CMR_PAGE_SIZE ||
-      granules.length >= maxRecords ||
-      granules.length >= hits
+      rawCount < CMR_PAGE_SIZE ||
+      readCount >= maxRecords ||
+      readCount >= hits
     )
       break;
   }
-  return { granules, truncated: hits > granules.length };
+  return { granules, truncated: hits > readCount || capped > 0 };
 }
 
 function finiteOrNull(value) {
diff --git a/src/layers/recentImagery/cmr-raw-page-budget.test.mjs b/src/layers/recentImagery/cmr-raw-page-budget.test.mjs
new file mode 100644
index 000000000..c1709b9b2
--- /dev/null
+++ b/src/layers/recentImagery/cmr-raw-page-budget.test.mjs
@@ -0,0 +1,98 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { fetchCmrPages } from './catalog.js';
+const item = (id) => ({
+  meta: { 'concept-id': id },
+  umm: {
+    TemporalExtent: {
+      RangeDateTime: { BeginningDateTime: '2026-09-18T12:00:00Z' },
+    },
+  },
+});
+test('discarded rows do not turn a full CMR page into a final page', async () => {
+  let calls = 0;
+  const result = await fetchCmrPages({
+    product: 'S30',
+    url: 'fixture',
+    fetchImpl: async () => {
+      calls++;
+      const items =
+        calls === 1
+          ? Array.from({ length: 200 }, (_, i) =>
+              i === 0 ? {} : item(String(i)),
+            )
+          : [item('last')];
+      return Response.json(
+        { hits: 201, items },
+        { headers: { 'CMR-Search-After': `cursor-${calls}` } },
+      );
+    },
+  });
+  assert.equal(calls, 2);
+  assert.equal(result.granules.length, 200);
+  assert.equal(result.granules.at(-1).id, 'last');
+  assert.equal(result.truncated, false);
+});
+test('a non-page-multiple limit never returns more admitted records than its budget', async () => {
+  let calls = 0;
+  const result = await fetchCmrPages({
+    product: 'S30',
+    url: 'fixture',
+    maxRecords: 250,
+    fetchImpl: async () => {
+      calls++;
+      return Response.json(
+        {
+          hits: 1000,
+          items: Array.from({ length: 200 }, (_, i) => item(`${calls}:${i}`)),
+        },
+        { headers: { 'CMR-Search-After': `cursor-${calls}` } },
+      );
+    },
+  });
+  assert.equal(calls, 2);
+  assert.equal(result.granules.length, 250);
+  assert.equal(result.truncated, true);
+});
+test('valid records dropped by the cap mark the result truncated even when every hit was read', async () => {
+  let calls = 0;
+  const result = await fetchCmrPages({
+    product: 'S30',
+    url: 'fixture',
+    maxRecords: 250,
+    fetchImpl: async () => {
+      calls++;
+      return Response.json(
+        {
+          hits: 400,
+          items: Array.from({ length: 200 }, (_, i) => item(`${calls}:${i}`)),
+        },
+        { headers: { 'CMR-Search-After': `cursor-${calls}` } },
+      );
+    },
+  });
+  assert.equal(calls, 2);
+  assert.equal(result.granules.length, 250);
+  assert.equal(result.truncated, true);
+});
+test('malformed rows discarded under the cap leave a fully examined result untruncated', async () => {
+  let calls = 0;
+  const result = await fetchCmrPages({
+    product: 'S30',
+    url: 'fixture',
+    maxRecords: 250,
+    fetchImpl: async () => {
+      calls++;
+      const items = Array.from({ length: 200 }, (_, i) =>
+        calls === 2 && i >= 50 ? {} : item(`${calls}:${i}`),
+      );
+      return Response.json(
+        { hits: 400, items },
+        { headers: { 'CMR-Search-After': `cursor-${calls}` } },
+      );
+    },
+  });
+  assert.equal(calls, 2);
+  assert.equal(result.granules.length, 250);
+  assert.equal(result.truncated, false);
+});
diff --git a/src/layers/recentImagery/source.js b/src/layers/recentImagery/source.js
index 258e8e2e1..9e6749cb7 100644
--- a/src/layers/recentImagery/source.js
+++ b/src/layers/recentImagery/source.js
@@ -1,7 +1,11 @@
 import { searchHls } from './catalog.js';
 import { gibsTemplate, wvsSnapshotUrl } from './model.js';
 
-/** NASA-compatible imagery acquisition; transport and URL builders are replaceable. */
+/**
+ * NASA-compatible imagery acquisition; transport and URL builders are replaceable.
+ * Thumbnail responses must expose Data-Present: true for image admission, or
+ * false for confirmed empty coverage, including injected getThumbnail sources.
+ */
 export function createRecentImagerySource({
   fetchImpl = (...args) => globalThis.fetch(...args),
   search = searchHls,
diff --git a/src/layers/recentImagery/thumbnail-presence-proof.test.mjs b/src/layers/recentImagery/thumbnail-presence-proof.test.mjs
new file mode 100644
index 000000000..4605079b1
--- /dev/null
+++ b/src/layers/recentImagery/thumbnail-presence-proof.test.mjs
@@ -0,0 +1,30 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { createThumbnailLoader } from './thumbnails.js';
+test('missing or malformed presence evidence cannot prove thumbnail pixels', async () => {
+  for (const header of [null, 'unknown', '', 'true', 'false']) {
+    let decodes = 0;
+    const loader = createThumbnailLoader({
+      requestThumbnail: async () => ({
+        ok: true,
+        headers: { get: (key) => (key === 'Data-Present' ? header : null) },
+        blob: async () => {
+          decodes++;
+          return new Blob(['fixture']);
+        },
+      }),
+      createObjectUrl: () => 'blob:fixture',
+    });
+    loader.request(
+      { key: 'fixture', product: 'S30', day: '2026-09-18' },
+      { west: 0, east: 1, south: 0, north: 1 },
+    );
+    await new Promise((resolve) => setImmediate(resolve));
+    assert.equal(
+      loader.get('fixture').status,
+      header === 'true' ? 'present' : header === 'false' ? 'empty' : 'error',
+    );
+    assert.equal(decodes, header === 'true' ? 1 : 0);
+    loader.destroy();
+  }
+});
diff --git a/src/layers/recentImagery/thumbnails.js b/src/layers/recentImagery/thumbnails.js
index 23fe4dd49..4aaec294b 100644
--- a/src/layers/recentImagery/thumbnails.js
+++ b/src/layers/recentImagery/thumbnails.js
@@ -100,12 +100,12 @@ export function createThumbnailLoader({
         cancelled = true;
       } else if (response?.ok) {
         const present = String(
-          response.headers?.get?.('Data-Present') ?? 'true',
+          response.headers?.get?.('Data-Present') ?? '',
         ).toLowerCase();
         acquisitionTime = response.headers?.get?.('Acquisition-Time') || null;
         if (present === 'false') {
           status = 'empty';
-        } else {
+        } else if (present === 'true') {
           const blob = await response.blob();
           if (controller.signal.aborted) cancelled = true;
           else {
diff --git a/src/proxyErrorResponses.test.mjs b/src/proxyErrorResponses.test.mjs
index 2b45a3b9e..c6a7269ab 100644
--- a/src/proxyErrorResponses.test.mjs
+++ b/src/proxyErrorResponses.test.mjs
@@ -2,6 +2,7 @@ import test from 'node:test';
 import assert from 'node:assert/strict';
 import { readFileSync } from 'node:fs';
 import path from 'node:path';
+import { parseTerrainPoints } from './data/terrainHeightsProxy.js';
 import { readResponseTextCapped, coalesceProxyRequest } from './sources/httpBody.js';
 
 const source = ['local.js', 'common/http.js', 'aircraft/enrichment.js', 'terrain.js', 'space/celestrak.js', 'space/launch-library.js', '../../src/data/spaceProviderRequests.js']
@@ -172,3 +173,18 @@ test('ADSBDB retains validation and missing-aircraft semantics', async () => {
   assert.equal(absent.status, 200);
   assert.deepEqual(JSON.parse(absent.body), { found: false });
 });
+
+for (const preview of [false, true]) {
+  test(`terrain server rejects out-of-range points before upstream resolution in ${preview ? 'preview' : 'development'}`, async () => {
+    let calls = 0;
+    const app = fixture('terrainHeightsProxy', { parseTerrainPoints,
+      resolveTerrainHeightRequest: async () => { calls++; return { status: 200, body: { results: [] } }; },
+    }, preview);
+    for (const points of ['181,0', '-181,0', '0,91', '0,-91', '1,2;0,91']) {
+      assert.equal((await app.request('/?points=' + encodeURIComponent(points))).status, 400);
+    }
+    assert.equal(calls, 0);
+    assert.equal((await app.request('/?points=-180,-90;180,90')).status, 200);
+    assert.equal(calls, 1);
+  });
+}
diff --git a/src/services/boundary-probe-recovery.test.mjs b/src/services/boundary-probe-recovery.test.mjs
new file mode 100644
index 000000000..cc0c47c08
--- /dev/null
+++ b/src/services/boundary-probe-recovery.test.mjs
@@ -0,0 +1,38 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { createApplicationRequestServices } from './requests.js';
+test('unknown capability replies recover after backoff', async (t) => {
+  t.mock.timers.enable({ apis: ['Date'], now: 100_000 });
+  for (const first of [
+    () => Response.json({ wrong: true }),
+    () => new Response('bad', { status: 503 }),
+  ]) {
+    let probes = 0;
+    let queries = 0;
+    const services = createApplicationRequestServices({
+      boundaryProbe: { timeoutMs: 1000, retryMs: 1000 },
+      fetchImpl: async (url) => {
+        if (url.endsWith('/status'))
+          return ++probes === 1
+            ? first()
+            : Response.json({ configured: false });
+        queries++;
+        return Response.json({ elements: [] });
+      },
+    });
+    assert.deepEqual(await services.boundaries.query('fixture'), []);
+    assert.deepEqual(await services.boundaries.query('fixture'), []);
+    assert.equal(probes, 1, 'unknown reply is not re-probed inside backoff');
+    t.mock.timers.tick(1000);
+    assert.equal(
+      (await services.boundaries.query('fixture')).code,
+      'OVERPASS_NOT_CONFIGURED',
+    );
+    assert.equal(
+      (await services.boundaries.query('fixture')).code,
+      'OVERPASS_NOT_CONFIGURED',
+    );
+    assert.equal(probes, 2);
+    assert.equal(queries, 2);
+  }
+});
diff --git a/src/services/requests.js b/src/services/requests.js
index bb0b4cefd..3e3a819eb 100644
--- a/src/services/requests.js
+++ b/src/services/requests.js
@@ -66,9 +66,9 @@ export function createApplicationRequestServices({
       throw new Error(`${label} unavailable (${response.status})`);
     return response.data;
   }
-  // Learn once per page whether the server has an Overpass instance, so an
+  // Remember valid capability decisions for the page, so an
   // unconfigured server is never asked (and never answers with an error).
-  // Discovery is bounded; a failed or timed-out probe is forgotten and not
+  // Discovery is bounded; failed, malformed or timed-out probes are forgotten and not
   // retried for a short backoff, during which queries go to the server as
   // they would against an older server without the probe.
   let boundaryCapability = null;
@@ -79,10 +79,13 @@ export function createApplicationRequestServices({
     boundaryCapability = request(`${urls.boundaries}/status`, {
       signal: AbortSignal.timeout(boundaryProbe.timeoutMs),
     }).then(
-      (response) =>
-        response.ok && typeof response.data?.configured === 'boolean'
-          ? response.data.configured
-          : null, // an older server: fall back to asking per query
+      (response) => {
+        if (response.ok && typeof response.data?.configured === 'boolean')
+          return response.data.configured;
+        boundaryCapability = null;
+        boundaryProbeRetryAt = Date.now() + boundaryProbe.retryMs;
+        return null; // capability unknown: let this query ask the server
+      },
       (error) => {
         boundaryCapability = null;
         if (lifetime?.aborted) throw error;
diff --git a/src/tools/catalog-cancellation.test.mjs b/src/tools/catalog-cancellation.test.mjs
new file mode 100644
index 000000000..0f666b262
--- /dev/null
+++ b/src/tools/catalog-cancellation.test.mjs
@@ -0,0 +1,51 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { composeCatalog, defineTool } from './catalog.js';
+
+for (const intercept of [false, true]) {
+  test(`cancelled query refuses execution${intercept ? ' after an awaited interceptor' : ''}`, async () => {
+    let calls = 0;
+    const controller = new AbortController();
+    const query = defineTool({
+      name: 'fixture_query',
+      kind: 'query',
+      title: 'Fixture',
+      description: 'Offline fixture',
+      inputSchema: { type: 'object' },
+      run: async () => {
+        calls++;
+        return { summary: 'fixture', data: {} };
+      },
+    });
+    const catalog = composeCatalog({
+      tools: [query],
+      interceptors: intercept
+        ? [
+            async (call, next) => {
+              await Promise.resolve();
+              controller.abort();
+              return next(call);
+            },
+          ]
+        : [],
+    });
+    if (!intercept) controller.abort();
+    await assert.rejects(
+      catalog.call('fixture_query', {}, { signal: controller.signal }),
+      { name: 'AbortError' },
+    );
+    assert.equal(calls, 0);
+    const fresh = composeCatalog({ tools: [query] });
+    assert.equal(
+      (
+        await fresh.call(
+          'fixture_query',
+          {},
+          { signal: new AbortController().signal },
+        )
+      ).summary,
+      'fixture',
+    );
+    assert.equal(calls, 1);
+  });
+}
diff --git a/src/tools/catalog.js b/src/tools/catalog.js
index 4d5106b6e..d617a9f28 100644
--- a/src/tools/catalog.js
+++ b/src/tools/catalog.js
@@ -178,6 +178,7 @@ export function composeCatalog({
     return chain({ tool, args, signal, ...(parent ? { parent } : {}) });
   };
   const execute = async ({ tool, args, signal }) => {
+    signal?.throwIfAborted();
     const problems = validateValue(tool.inputSchema, args);
     if (problems.length)
       throw new ToolError('invalid_arguments', problems.join('; '));
diff --git a/src/ui/surface-tab-order.test.mjs b/src/ui/surface-tab-order.test.mjs
new file mode 100644
index 000000000..c3f335407
--- /dev/null
+++ b/src/ui/surface-tab-order.test.mjs
@@ -0,0 +1,57 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { createSurfaceKeyboard } from './surfaceKeyboard.js';
+test('surface cycling never targets deliberately excluded controls', () => {
+  let handler;
+  const documentRef = {
+    activeElement: {},
+    addEventListener: (_, fn) => (handler = fn),
+    removeEventListener() {},
+  };
+  const node = ({
+    attributes = {},
+    fieldsetDisabled = false,
+    inert = false,
+  } = {}) => ({
+    hasAttribute: (name) => Object.hasOwn(attributes, name),
+    getClientRects: () => [{}],
+    getAttribute: (name) => attributes[name] ?? null,
+    matches: (selector) => selector === ':disabled' && fieldsetDisabled,
+    closest: (selector) =>
+      selector === '[inert]' && inert ? { inert: true } : null,
+    focus() {
+      documentRef.activeElement = this;
+    },
+  });
+  const ignored = [
+    node({ attributes: { tabindex: '-1' } }),
+    node({ fieldsetDisabled: true }),
+    node({ inert: true }),
+  ];
+  const first = node({}),
+    last = node({});
+  const controls = [...ignored, first, last];
+  const root = {
+    ownerDocument: documentRef,
+    querySelectorAll: () => controls,
+    contains: (n) => controls.includes(n),
+  };
+  const surface = createSurfaceKeyboard({
+    root,
+    isActive: () => true,
+    onEscape() {},
+  });
+  surface.activate();
+  const press = (shiftKey) =>
+    handler({
+      key: 'Tab',
+      shiftKey,
+      preventDefault() {},
+      stopPropagation() {},
+    });
+  press(false);
+  assert.equal(documentRef.activeElement, first);
+  press(true);
+  assert.equal(documentRef.activeElement, last);
+  surface.destroy();
+});
diff --git a/src/ui/surfaceKeyboard.js b/src/ui/surfaceKeyboard.js
index 38417975a..141e22fa6 100644
--- a/src/ui/surfaceKeyboard.js
+++ b/src/ui/surfaceKeyboard.js
@@ -39,7 +39,11 @@ export function createSurfaceKeyboard({
       ),
     ].filter(
       (node) =>
-        !node.hasAttribute('disabled') && node.getClientRects().length > 0,
+        !node.hasAttribute('disabled') &&
+        !node.matches?.(':disabled') &&
+        !(Number(node.getAttribute?.('tabindex')) < 0) &&
+        !node.closest?.('[inert]') &&
+        node.getClientRects().length > 0,
     );
     if (!order.length) return;
     const first = order[0];