diff --git a/test/autoplan-dual-voice-evidence.test.ts b/test/autoplan-dual-voice-evidence.test.ts
index 6d7c12827..2c01b9221 100644
--- a/test/autoplan-dual-voice-evidence.test.ts
+++ b/test/autoplan-dual-voice-evidence.test.ts
@@ -335,3 +335,16 @@ test.each(['missing-native','foreign-outside-result','changed-prompt','changed-o
   expect(f.read().codexAttempted,kind).toBe(false);
  }
 });
+test('outside-voice failure reasons name the probe identity, mode and canonical match',()=>{
+ const withoutOutside=()=>{const f=fixture();f.events.splice(6);return f;};
+ const probeReason=(f:ReturnType<typeof fixture>)=>f.read().reasons.find(reason=>reason.startsWith('probeToolUseId='));
+ let f=withoutOutside();
+ expect(probeReason(f)).toBe('probeToolUseId=probe probeMode=ready canonicalMatch=yes (mode recorded; 0 non-canonical Bash call(s) mention CODEX_MODE)');
+ f=withoutOutside();f.events[0]!.message.content[0].input.command='echo probing\n'+f.options.commands.probe;
+ expect(probeReason(f)).toBe('probeToolUseId=none probeMode=none canonicalMatch=no (no Bash call matched the canonical probe block; 1 non-canonical Bash call(s) mention CODEX_MODE)');
+ f=withoutOutside();f.events[1]=ack('probe','CODEX_MODE: not_installed\nextra trailing output');
+ expect(probeReason(f)).toBe('probeToolUseId=probe probeMode=none canonicalMatch=yes (probe output has 1 CODEX_MODE line(s) and does not end with it; 0 non-canonical Bash call(s) mention CODEX_MODE)');
+ f=withoutOutside();f.events[1]=ack('probe','CODEX_MODE: not_installed',true);
+ expect(probeReason(f)).toContain('canonicalMatch=yes (probe result is an error;');
+ expect(fixture().read().reasons).toEqual([]);
+});
diff --git a/test/helpers/autoplan-dual-voice-evidence.ts b/test/helpers/autoplan-dual-voice-evidence.ts
index 6263476ff..58fb1ec97 100644
--- a/test/helpers/autoplan-dual-voice-evidence.ts
+++ b/test/helpers/autoplan-dual-voice-evidence.ts
@@ -160,13 +160,22 @@ export function autoplanDualVoiceEvidence(transcript: unknown[], options: Autopl
     }
     return seen.size > 0;
   };
+  let probeResult = 'no Bash call matched the canonical probe block';
+  let nonCanonicalProbes = 0;
   for (const call of calls.values()) {
-    if (call.name !== 'Bash' || typeof call.input.command !== 'string' || !canonical(call.input.command, options.commands.probe)) continue;
+    if (call.name !== 'Bash' || typeof call.input.command !== 'string') continue;
+    if (!canonical(call.input.command, options.commands.probe)) {
+      if (call.input.command.includes('CODEX_MODE')) nonCanonicalProbes++;
+      continue;
+    }
     result.probeToolUseId = call.id; delete result.probeMode;
-    if (!call.result || call.result.error) continue;
+    if (!call.result || call.result.error) { probeResult = call.result ? 'probe result is an error' : 'probe has no result'; continue; }
     const modes = [...call.result.content.matchAll(/^CODEX_MODE: ([a-z_]+)\r?$/gm)];
-    if (modes.length !== 1 || !call.result.content.trimEnd().endsWith(modes[0]![0])) continue;
-    result.probeToolUseId = call.id; result.probeMode = modes[0]![1];
+    if (modes.length !== 1 || !call.result.content.trimEnd().endsWith(modes[0]![0])) {
+      probeResult = `probe output has ${modes.length} CODEX_MODE line(s) and ${modes.length === 1 ? 'does not end with it' : 'needs exactly one'}`;
+      continue;
+    }
+    result.probeToolUseId = call.id; result.probeMode = modes[0]![1]; probeResult = 'mode recorded';
   }
   const native: Array<{ call: Call; snapshot: any; content: string }> = [];
   for (const call of calls.values()) {
@@ -226,6 +235,10 @@ export function autoplanDualVoiceEvidence(transcript: unknown[], options: Autopl
   }
   result.codexUnavailable ||= result.claudeVoiceFired && ['not_installed', 'not_authed', 'broken_install', 'model_unusable'].includes(result.probeMode ?? '');
   if (!result.claudeVoiceFired) result.reasons.push('No acknowledged current CEO phase dispatch');
-  if (!result.codexVoiceFired && !result.codexUnavailable) result.reasons.push('No acknowledged outside execution or actual unavailable probe result');
+  if (!result.codexVoiceFired && !result.codexUnavailable) {
+    result.reasons.push('No acknowledged outside execution or actual unavailable probe result');
+    result.reasons.push(`probeToolUseId=${result.probeToolUseId ?? 'none'} probeMode=${result.probeMode ?? 'none'} ` +
+      `canonicalMatch=${result.probeToolUseId ? 'yes' : 'no'} (${probeResult}; ${nonCanonicalProbes} non-canonical Bash call(s) mention CODEX_MODE)`);
+  }
   return result;
 }
diff --git a/test/helpers/shared-libs-eval-fixture.ts b/test/helpers/shared-libs-eval-fixture.ts
index dd3734b08..67bf04807 100644
--- a/test/helpers/shared-libs-eval-fixture.ts
+++ b/test/helpers/shared-libs-eval-fixture.ts
@@ -477,6 +477,81 @@ export function isInternalClaudeGitRequest(request: SourceRequest, commands: str
     !commands.some(command => command.includes('core.safecrlf=false') || command.includes('protocol.ext.allow=never'));
 }
 
+/** Older open PRs outside the 14-day window: more than the skill's five 100-item open-metadata pages. */
+export const SHARED_LIBS_OLDER_OPEN_PRS = 600;
+
+/** One finite PR world, newest update first. Self-contained so the fixture executable uses this exact table. */
+function sharedPullRequestTable(now: string, olderOpen: number) {
+  const hour = 3_600_000, newestOlder = Date.UTC(2025, 0, 1);
+  return [
+    { number: 7, state: 'open', updated: now },
+    ...Array.from({ length: olderOpen }, (_, i) => ({ number: 100 + olderOpen - 1 - i, state: 'open',
+      updated: new Date(newestOlder - i * hour).toISOString() })),
+    { number: 42, state: 'open', updated: '2020-01-01T00:00:00Z' },
+    ...[5, 4, 3].map((number, i) => ({ number, state: 'closed', updated: new Date(Date.UTC(2019, 5, 1) - i * hour).toISOString() })),
+  ];
+}
+
+/** gh pr list, pulls?state= and search/issues as views of the same table; null for any other request. */
+function sharedPullRequestView(table: Array<{ number: number; state: string; updated: string; title: string; body: string }>,
+  args: string[], endpoint: string) {
+  const [route, search = ''] = endpoint.replace(/^\//, '').split('?');
+  const params = new URLSearchParams(search);
+  const flag = (names: string[]) => {
+    for (let i = 0; i < args.length; i++) {
+      if (names.includes(args[i]!)) return args[i + 1];
+      const joined = names.find(name => name.startsWith('--') && args[i]!.startsWith(name + '='));
+      if (joined) return args[i]!.slice(joined.length + 1);
+    }
+    return undefined;
+  };
+  const matches = (query: string) => {
+    let state = '', rest = query;
+    const dates: Array<(pr: { updated: string }) => boolean> = [];
+    const words: string[] = [];
+    for (const term of rest.split(/\s+/).filter(Boolean)) {
+      const qualifier = /^(is|state|type|updated|created|repo):(.+)$/i.exec(term);
+      if (!qualifier) { words.push(term.replace(/^"|"$/g, '').toLowerCase()); continue; }
+      const [, key, value] = qualifier as unknown as [string, string, string];
+      if (/^(?:is|state)$/i.test(key) && /^(?:open|closed|merged)$/i.test(value)) state = value.toLowerCase();
+      else if (/^(?:is|type)$/i.test(key) && /^issue$/i.test(value)) return () => false;
+      else if (/^repo$/i.test(key) && value.toLowerCase() !== 'fixture/shared-libs') return () => false;
+      else if (/^(?:updated|created)$/i.test(key)) {
+        const range = /^(.+)\.\.(.+)$/.exec(value), op = /^(>=|<=|>|<)?(.+)$/.exec(value)!;
+        const at = (text: string) => Date.parse(text);
+        if (range) dates.push(pr => at(pr.updated) >= at(range[1]!) && at(pr.updated) <= at(range[2]!) + 86_399_999);
+        else dates.push(pr => { const t = at(pr.updated), v = at(op[2]!);
+          return op[1] === '>=' ? t >= v : op[1] === '>' ? t > v : op[1] === '<=' ? t <= v + 86_399_999 : op[1] === '<' ? t < v : t >= v && t <= v + 86_399_999; });
+      }
+    }
+    return (pr: { state: string; updated: string; title: string; body: string }) =>
+      (!state || pr.state === state) && dates.every(check => check(pr)) &&
+      words.every(word => (pr.title + ' ' + pr.body).toLowerCase().includes(word));
+  };
+  const page = (rows: typeof table, perPage: number, number: number) => {
+    const size = Math.min(100, Math.max(1, perPage || 30));
+    return rows.slice((Math.max(1, number || 1) - 1) * size, Math.max(1, number || 1) * size);
+  };
+  if (args[0] === 'pr' && args[1] === 'list') {
+    const state = (flag(['--state', '-s']) || 'open').toLowerCase();
+    const rows = table.filter(pr => state === 'all' || pr.state === state).filter(matches(flag(['--search', '-S']) || ''));
+    return rows.slice(0, Math.max(1, Number(flag(['--limit', '-L']) || 30)));
+  }
+  if (/^repos\/fixture\/shared-libs\/pulls$/.test(route!)) {
+    const state = (params.get('state') || 'open').toLowerCase();
+    const rows = table.filter(pr => state === 'all' || pr.state === state);
+    if (params.get('direction') === 'asc') rows.reverse();
+    return page(rows, Number(params.get('per_page')), Number(params.get('page')));
+  }
+  if (route === 'search/issues') {
+    const rows = table.filter(matches(params.get('q') || ''));
+    if (params.get('order') === 'asc') rows.reverse();
+    return { total_count: rows.length, incomplete_results: false,
+      items: page(rows, Number(params.get('per_page')), Number(params.get('page'))) };
+  }
+  return null;
+}
+
 export function installSourceShims(f: SharedLibsFixture, opts: {
   unsupportedGit?: boolean; unavailableApi?: boolean; prCoverage?: boolean;
 } = {}): void {
@@ -567,24 +642,25 @@ const sources=${JSON.stringify(sources)};
 const base={name:'main',sha:${JSON.stringify(f.tip)}};
 const pr=(number,date,extra={})=>({number,state:'open',title:number===42?'Extract retry parsing into existing helper':'Routine documentation '+number,body:number===7?'Coordination: https://github.com/fixture/shared-libs/pull/42':'',created_at:date,updated_at:date,merged_at:null,createdAt:date,updatedAt:date,mergedAt:null,url:'https://github.com/fixture/shared-libs/pull/'+number,html_url:'https://github.com/fixture/shared-libs/pull/'+number,head:{sha:number===42?prHead:${JSON.stringify(f.tip)},ref:'feature-'+number},base:{sha:${JSON.stringify(f.tip)},ref:'main'},...extra});
 const page=Number((endpoint.match(/[?&]page=(\\d+)/)||[])[1]||a[a.indexOf('-F')+1]?.match(/^page=(\\d+)/)?.[1]||1);
-let out;
+const view=${sharedPullRequestView.toString()};
+const prTable=${!!opts.prCoverage}?(${sharedPullRequestTable.toString()})(now,${SHARED_LIBS_OLDER_OPEN_PRS}).map(row=>({...row,title:pr(row.number,row.updated).title,body:pr(row.number,row.updated).body})):[];
+const toPr=row=>pr(row.number,row.updated,row.state==='closed'?{state:'closed',closed_at:row.updated}:{});
+let out,listing;
 if(a[0]==='auth')process.exit(0);
 else if(a[0]==='repo') out={nameWithOwner:'fixture/shared-libs',defaultBranchRef:base,url:'https://github.com/fixture/shared-libs'};
-else if(a[0]==='pr'&&a[1]==='list')out=${!!opts.prCoverage}?[pr(7,now),pr(42,old)]:[];
+else if((listing=view(prTable,a,endpoint))!==null)out=Array.isArray(listing)?listing.map(toPr):{...listing,items:listing.items.map(row=>({...toPr(row),pull_request:{url:'https://api.github.com/repos/fixture/shared-libs/pulls/'+row.number}}))};
 else if(a[0]==='pr'&&a[1]==='view')out=pr(Number(a[2])||42,Number(a[2])===7?now:old,{files:[{path:Number(a[2])===7?'docs/unrelated.md':'src/retry-worker.ts'}]});
-else if(endpoint.includes('search/issues'))out={total_count:${opts.prCoverage ? 1 : 0},incomplete_results:false,items:${!!opts.prCoverage}?[pr(7,now)]:[]};
-else if(endpoint.includes('/contents/')) { const p=decodeURIComponent(endpoint.split('/contents/')[1].split('?')[0]); const ref=decodeURIComponent((endpoint.match(/[?&]ref=([^&]+)/)||[])[1]||'');if(!Object.hasOwn(sources,ref))apiError(404,'unsupported or unpinned fixture revision');const source=sources[ref];if(!Object.hasOwn(source.files,p))apiError(404,'source unavailable');out={path:p,encoding:'base64',content:source.files[p],sha:source.blobs[p]}; }
+else if(/\\/contents(?:\\/|\\?|$)/.test(endpoint)) { const p=decodeURIComponent(endpoint.split(/\\/contents/)[1].split('?')[0]).replace(/^\\/+|\\/+$/g,''); const ref=decodeURIComponent((endpoint.match(/[?&]ref=([^&]+)/)||[])[1]||'');if(!Object.hasOwn(sources,ref))apiError(404,'unsupported or unpinned fixture revision');const source=sources[ref];
+ if(Object.hasOwn(source.files,p))out={type:'file',name:p.split('/').pop(),path:p,encoding:'base64',content:source.files[p],sha:source.blobs[p]};
+ else { const prefix=p?p+'/':'';const names=[...new Set(Object.keys(source.files).filter(file=>file.startsWith(prefix)).map(file=>file.slice(prefix.length).split('/')[0]))].sort();if(!names.length)apiError(404,'source unavailable');out=names.map(name=>{const file=prefix+name;return Object.hasOwn(source.files,file)?{type:'file',name,path:file,sha:source.blobs[file]}:{type:'dir',name,path:file};}); } }
 else if(/\\/pulls\\/42\\/files/.test(endpoint))out=page===1?Array.from({length:100},(_,i)=>({filename:'docs/coordination-'+i+'.md',status:'added',patch:'@@ -0,0 +1 @@\\n+Documentation coordination '+i+'.'})):page===2?[{filename:'src/retry-worker.ts',status:'modified',patch:${JSON.stringify(prPatch)}}]:[];
 else if(/\\/pulls\\/\\d+\\/files/.test(endpoint))out=page===1?[{filename:'docs/unrelated.md',status:'modified',patch:'@@ -1 +1 @@\\n-old\\n+new'}]:[];
 else if(/\\/pulls\\/42(?:\\?|$)/.test(endpoint))out=pr(42,old);
-else if(endpoint.includes('/pulls')) {
- if(!${!!opts.prCoverage})out=[];
- else if(endpoint.includes('state=open'))out=Array.from({length:100},(_,i)=>pr((page-1)*100+i+40,old));
- else out=page===1?[pr(7,now),pr(42,old)]:[];
-}
+else if(/\\/pulls\\/\\d+(?:\\?|$)/.test(endpoint)){const row=prTable.find(row=>row.number===Number(endpoint.match(/\\/pulls\\/(\\d+)/)[1]));if(!row)apiError(404,'Not Found');out=toPr(row);}
 else if(endpoint.includes('/commits')){const isPrCommit=prHead!==${JSON.stringify(f.tip)}&&endpoint.includes(prHead);out=endpoint.includes('/commits/')?{sha:isPrCommit?prHead:${JSON.stringify(f.tip)},commit:{committer:{date:isPrCommit?old:now},message:'Fixture work'},files:Object.keys(isPrCommit?prFiles:files).map(filename=>({filename,status:'modified'}))}:[{sha:${JSON.stringify(f.tip)},commit:{committer:{date:now},message:'Fixture work'}}];}
 else if(endpoint.includes('/branches/'))out={name:'main',commit:{sha:${JSON.stringify(f.tip)}}};
-else out={default_branch:'main',full_name:'fixture/shared-libs',html_url:'https://github.com/fixture/shared-libs'};
+else if(/^\\/?repos\\/fixture\\/shared-libs\\/?(?:\\?|$)/.test(endpoint))out={default_branch:'main',full_name:'fixture/shared-libs',html_url:'https://github.com/fixture/shared-libs'};
+else apiError(404,'Not Found');
 if(curl)curlResponse(out);
 const qi=a.findIndex(x=>x==='--jq'||x==='-q');
 if(qi>=0) {const r=cp.spawnSync('jq',['-r',a[qi+1]],{input:JSON.stringify(out),encoding:'utf8',timeout:30_000});process.stdout.write(r.stdout||'');process.stderr.write(r.stderr||'');process.exit(r.status??1);}
diff --git a/test/shared-libs-fixture.test.ts b/test/shared-libs-fixture.test.ts
index 40ca87a41..292382b82 100644
--- a/test/shared-libs-fixture.test.ts
+++ b/test/shared-libs-fixture.test.ts
@@ -7,7 +7,7 @@ import { execFileSync, spawnSync } from 'node:child_process';
 import {
   createSharedInteractiveToolHandler, createSharedLibsFixture, fixtureGit, fixtureWrite, installSourceShims,
   readRequests, seedOpportunitySources, sharedReadOnlyViolations, shellQuote, snapshotFixture, type SharedLibsFixture,
-  SharedCaptureAccumulator, type SharedCaptureAttempt, isInternalClaudeGitRequest,
+  SharedCaptureAccumulator, type SharedCaptureAttempt, isInternalClaudeGitRequest, SHARED_LIBS_OLDER_OPEN_PRS,
 } from './helpers/shared-libs-eval-fixture';
 import { EvalCollector, type EvalTestEntry } from './helpers/eval-store';
 import { collectorOutcomeCounts } from '../scripts/test-paid-shards';
@@ -955,6 +955,143 @@ function pinnedSource(f: SharedLibsFixture, revision: string, file: string) {
   return bytes;
 }
 
+function ghCli(f: SharedLibsFixture, args: string[]) {
+  return spawnSync(path.join(f.bin, 'gh'), args, {
+    cwd: f.repo, env: { ...process.env, ...f.env }, encoding: 'utf8', timeout: 10_000,
+  });
+}
+
+describe('shared-code PR coverage world', () => {
+  const numbers = (stdout: string) => (JSON.parse(stdout) as Array<{ number: number }>).map(pr => pr.number);
+  const pulls = (query: string) => `repos/fixture/shared-libs/pulls?${query}`;
+
+  test('gh pr list, pulls?state= and search/issues page one finite table in the same order', () => {
+    const f = createSharedLibsFixture('pr-world');
+    cleanup.push(f.root);
+    seedOpportunitySources(f);
+    installSourceShims(f, { prCoverage: true });
+    const scan = (state: string) => {
+      const rows: number[] = [];
+      for (let page = 1; page < 20; page++) {
+        const endpoint = pulls(`state=${state}&sort=updated&direction=desc&per_page=100&page=${page}`);
+        const response = gh(f, endpoint);
+        expect(response.status, response.stderr).toBe(0);
+        const batch = numbers(response.stdout);
+        // PR 7's activity timestamp is the request time; compare the table rows.
+        expect(numbers(curl(f, ['-sS', `https://api.github.com/${endpoint}`]).stdout)).toEqual(batch);
+        rows.push(...batch);
+        if (batch.length < 100) return { rows, pages: page };
+      }
+      throw new Error(`state=${state} listing never produced a short last page`);
+    };
+    const open = scan('open'), closed = scan('closed'), all = scan('all');
+    const olderOpen = SHARED_LIBS_OLDER_OPEN_PRS;
+    expect(open.rows).toHaveLength(olderOpen + 2);
+    expect(new Set(open.rows).size).toBe(open.rows.length);
+    expect(open.rows[0]).toBe(7);
+    expect(open.rows.at(-1)).toBe(42);
+    expect(closed.rows).toEqual([5, 4, 3]);
+    expect(all.rows).toEqual([...open.rows, ...closed.rows]);
+    expect(open.pages).toBe(Math.floor((olderOpen + 2) / 100) + 1);
+    expect(numbers(gh(f, pulls('page=1')).stdout)).toEqual(open.rows.slice(0, 30));
+    expect(numbers(gh(f, pulls('state=open&direction=asc&per_page=100&page=1')).stdout)).toEqual(open.rows.slice().reverse().slice(0, 100));
+
+    for (const [state, rows] of [['open', open.rows], ['closed', closed.rows], ['all', all.rows]] as const) {
+      const listed = ghCli(f, ['pr', 'list', '--state', state, '--limit', '10000']);
+      expect(listed.status, listed.stderr).toBe(0);
+      expect(numbers(listed.stdout)).toEqual([...rows]);
+    }
+    expect(numbers(ghCli(f, ['pr', 'list']).stdout)).toEqual(open.rows.slice(0, 30));
+    expect(numbers(ghCli(f, ['pr', 'list', '-L', '5']).stdout)).toEqual(open.rows.slice(0, 5));
+
+    const searched: number[] = [];
+    for (let page = 1; ; page++) {
+      const response = gh(f, `search/issues?q=${encodeURIComponent('repo:fixture/shared-libs is:pr is:open')}&per_page=100&page=${page}`);
+      expect(response.status, response.stderr).toBe(0);
+      const result = JSON.parse(response.stdout);
+      expect(result.total_count).toBe(open.rows.length);
+      searched.push(...result.items.map((item: { number: number }) => item.number));
+      if (result.items.length < 100) break;
+    }
+    expect(searched).toEqual(open.rows);
+    const since = new Date(Date.now() - 14 * 86_400_000).toISOString().slice(0, 10);
+    const recent = JSON.parse(gh(f, `search/issues?q=${encodeURIComponent(`repo:fixture/shared-libs is:pr updated:>=${since}`)}`).stdout);
+    expect(recent.items.map((item: { number: number }) => item.number)).toEqual([7]);
+    expect(recent.total_count).toBe(1);
+  });
+
+  test('the maximum authorized open-metadata scan still leaves older open PRs unchecked', () => {
+    const periodic = fs.readFileSync(path.join(import.meta.dir, 'skill-e2e-shared-libs-periodic.test.ts'), 'utf8');
+    expect(periodic).toContain('expect(openPages.length).toBeLessThanOrEqual(5);');
+    const f = createSharedLibsFixture('pr-world-budget');
+    cleanup.push(f.root);
+    seedOpportunitySources(f);
+    installSourceShims(f, { prCoverage: true });
+    const scanned: number[] = [];
+    for (let page = 1; page <= 5; page++) {
+      const batch = numbers(gh(f, pulls(`state=open&sort=updated&direction=desc&per_page=100&page=${page}`)).stdout);
+      expect(batch).toHaveLength(100);
+      scanned.push(...batch);
+    }
+    const everyOpen = numbers(ghCli(f, ['pr', 'list', '--state', 'open', '--limit', '10000']).stdout);
+    const unchecked = everyOpen.filter(number => !scanned.includes(number));
+    expect(unchecked.length).toBeGreaterThan(0);
+    expect(unchecked).toContain(42);
+    // The linked PR stays reachable directly, outside the metadata budget.
+    const direct = gh(f, 'repos/fixture/shared-libs/pulls/42');
+    expect(JSON.parse(direct.stdout)).toMatchObject({ number: 42, state: 'open', updated_at: '2020-01-01T00:00:00Z' });
+    expect(JSON.parse(gh(f, 'repos/fixture/shared-libs/pulls/7').stdout).number).toBe(7);
+  });
+
+  test('pinned contents agree across gh and curl for files and directories; unknown endpoints 404', () => {
+    const f = createSharedLibsFixture('pr-world-contents');
+    cleanup.push(f.root);
+    seedOpportunitySources(f);
+    installSourceShims(f, { prCoverage: true });
+    const root = gh(f, `repos/fixture/shared-libs/contents/?ref=${f.tip}`);
+    expect(root.status, root.stderr).toBe(0);
+    expect(JSON.parse(root.stdout)).toContainEqual({ type: 'dir', name: 'src', path: 'src' });
+    expect(gh(f, `repos/fixture/shared-libs/contents?ref=${f.tip}`).stdout).toBe(root.stdout);
+    for (const entry of ['src', 'src/retry-route.ts']) {
+      const endpoint = `repos/fixture/shared-libs/contents/${entry}?ref=${f.tip}`;
+      const viaGh = gh(f, endpoint), viaCurl = curl(f, ['-sS', `https://api.github.com/${endpoint}`]);
+      expect(viaGh.status, viaGh.stderr).toBe(0);
+      expect(viaCurl.status, viaCurl.stderr).toBe(0);
+      expect(viaCurl.stdout).toBe(viaGh.stdout);
+    }
+    const listing = JSON.parse(gh(f, `repos/fixture/shared-libs/contents/src?ref=${f.tip}`).stdout);
+    const file = listing.find((entry: { name: string }) => entry.name === 'retry-route.ts');
+    expect(file).toMatchObject({ type: 'file', path: 'src/retry-route.ts' });
+    expect(JSON.parse(gh(f, `repos/fixture/shared-libs/contents/src/retry-route.ts?ref=${f.tip}`).stdout).sha).toBe(file.sha);
+    expect(gh(f, 'repos/fixture/shared-libs/contents/src?ref=main').stderr).toContain('unsupported or unpinned');
+
+    for (const endpoint of [`repos/fixture/shared-libs/git/blobs/${'0'.repeat(40)}`,
+      `repos/fixture/shared-libs/git/trees/${f.tip}?recursive=1`, 'repos/fixture/shared-libs/pulls/999999', 'rate_limit']) {
+      const response = gh(f, endpoint);
+      expect(response.status, endpoint).not.toBe(0);
+      expect(response.stderr).toContain('HTTP 404');
+      expect(response.stdout).toBe('');
+    }
+    const missingPr = curl(f, ['-fsS', 'https://api.github.com/repos/fixture/shared-libs/pulls/999999']);
+    expect(missingPr.status).toBe(22);
+    expect(JSON.parse(gh(f, 'repos/fixture/shared-libs').stdout).default_branch).toBe('main');
+    // The read-only detector still rejects a raw-host fallback.
+    const raw = curl(f, ['-sS', `https://raw.githubusercontent.com/fixture/shared-libs/${f.tip}/src/retry-route.ts`]);
+    expect(raw.status).toBe(2);
+    expect(sharedReadOnlyViolations([], readRequests(f))).toEqual(['curl: unsupported curl URL: fixture GitHub GET endpoints only']);
+  });
+
+  test('without PR coverage every listing view is the same successful empty world', () => {
+    const f = createSharedLibsFixture('pr-world-empty');
+    cleanup.push(f.root);
+    installSourceShims(f);
+    expect(JSON.parse(ghCli(f, ['pr', 'list', '--state', 'all']).stdout)).toEqual([]);
+    expect(JSON.parse(gh(f, pulls('state=all&per_page=100&page=1')).stdout)).toEqual([]);
+    expect(JSON.parse(gh(f, 'search/issues?q=repo:fixture/shared-libs+is:pr').stdout))
+      .toEqual({ total_count: 0, incomplete_results: false, items: [] });
+  });
+});
+
 describe('shared-code Contents API revision fidelity', () => {
   test('default, branch and PR SHAs return their own exact committed bytes, excluding raw overlays', () => {
     const f = createSharedLibsFixture('source-fidelity');