chore: clear dead test and allowlist leftovers of dropped runtimes

tests/runtime-converters.test.cjs

@@ -341,7 +341,7 @@ describe('neutralizeAgentReferences', () => {
   test('uses different instruction file per runtime', () => {
     const input = 'Read CLAUDE.md for instructions.';
     assert.ok(neutralizeAgentReferences(input, 'GEMINI.md').includes('GEMINI.md'));
-    assert.ok(neutralizeAgentReferences(input, 'copilot-instructions.md').includes('copilot-instructions.md'));
+    assert.ok(neutralizeAgentReferences(input, 'OTHER-INSTRUCTIONS.md').includes('OTHER-INSTRUCTIONS.md'));
     assert.ok(neutralizeAgentReferences(input, 'AGENTS.md').includes('AGENTS.md'));
   });
 
@@ -564,7 +564,7 @@ describe('feat-1173: stageAgentsForRuntimeWithConverter', () => {
     const calls = [];
     const converter = (content) => {
       calls.push(content);
-      return content.replace('~/.claude/', '~/.copilot/');
+      return content.replace('~/.claude/', '~/.opencode/');
     };
 
     const resolvedProfile = { name: 'full', skills: '*', agents: new Set() };
@@ -574,11 +574,11 @@ describe('feat-1173: stageAgentsForRuntimeWithConverter', () => {
     const stagedFiles = fs.readdirSync(stagedDir).sort();
     assert.deepStrictEqual(stagedFiles, ['msd-executor.md', 'msd-planner.md']);
 
-    // Converter replaced ~/.claude/ with ~/.copilot/ in all staged files
+    // Converter replaced ~/.claude/ with ~/.opencode/ in all staged files
     for (const file of stagedFiles) {
       const content = fs.readFileSync(path.join(stagedDir, file), 'utf8');
       assert.ok(!content.includes('~/.claude/'), `${file}: converter must have replaced ~/.claude/`);
-      assert.ok(content.includes('~/.copilot/'), `${file}: converter must have injected ~/.copilot/`);
+      assert.ok(content.includes('~/.opencode/'), `${file}: converter must have injected ~/.opencode/`);
     }
   });
 
@@ -1894,7 +1894,7 @@ test('manager.md and autonomous.md no longer contain old "not claude" background
  *   description: [BETA] Offload plan phase to Claude Code's ultraplan…
  *
  * YAML 1.2 treats a leading `[` as the start of a flow sequence, so any
- * downstream parser (gh-copilot, JetBrains' kit, etc.) fails with
+ * downstream parser (JetBrains' kit, etc.) fails with
  * "Unexpected scalar at node end". The Antigravity
  * skill+agent converters in `bin/install.js` re-emit the description
  * unquoted; the Claude variant `yamlQuote(...)`s it. Bring the others