refactor: drop 12 runtimes, keep Claude, Codex, OpenCode, Cursor, ZCode, Antigravity

Removes kilo, kimi, kimi-code, copilot, windsurf, augment, trae, qwen, hermes,
cline, codebuddy and pi end to end: capability descriptors, installer branches
and converters (bin/install.js 14.9k -> 11.2k lines), TypeScript converters,
hook surfaces and runtime homes, review lanes qwen/kimi-code, the two pi
migrations, Kimi payload normalization in the hook guards, dead hostBehaviors
vocabulary, launcher home probes, fixtures, runtime-specific tests and the
prose that presented them as supported.

Installer output for the six kept runtimes is byte-identical to before the
prune. The Kimi tool-vocabulary tests in workflow-guard, read-guard and
read-injection-scanner are left in place pending a decision.

tests/hooks-opt-in.test.cjs

@@ -1526,95 +1526,6 @@ EOF
     assert.strictEqual(parsed.hookSpecificOutput.planning_modified, true);
     assert.strictEqual(parsed.hookSpecificOutput.file_path, '.planning/STATE.md');
   });
-
-  // #2304 — Kimi tool vocabulary engages the hook: Kimi CLI registers this
-  // hook with matcher 'WriteFile|StrReplaceFile' and its file tools name the
-  // path field `path`, not `file_path` (kimi-cli src/kimi_cli/tools/file/
-  // write.py + replace.py). Pre-fix, the hook read '' on Kimi payloads and
-  // .planning/ writes were silently undetected.
-  test('phase-boundary detects .planning/ writes from Kimi tool_input.path (#2304)', () => {
-    const hookPath = path.join(HOOKS_DIR, 'msd-phase-boundary.sh');
-    const input = JSON.stringify({
-      tool_name: 'kimi_cli.tools.file:WriteFile',
-      tool_input: { path: '.planning/STATE.md', content: 'x' }
-    });
-
-    const result = spawnHook(hookPath, {
-      input,
-      encoding: 'utf-8',
-      cwd: tmpDir,
-    });
-
-    assert.strictEqual(result.status, 0, `Should exit 0: ${result.stderr}`);
-    const parsed = JSON.parse(result.stdout);
-    assert.strictEqual(parsed.hookSpecificOutput.planning_modified, true,
-      'Kimi path field must be detected — pre-fix the hook read an empty path (#2304)');
-    assert.strictEqual(parsed.hookSpecificOutput.file_path, '.planning/STATE.md');
-  });
-
-  // #2752 — `path` is the AUTHORITATIVE field (kimi-cli executes on it; its file
-  // tools send `path` only). `file_path` is model-controlled on Kimi (kimi-cli never
-  // sends it). The old precedence (`file_path || path`) let a model-supplied decoy
-  // `file_path` suppress the reminder for a real write or fabricate one for a file
-  // never touched. Mirrors the #2595 JS-guard fix: `path` wins, `file_path` is the
-  // fallback (Claude emits `file_path` and no `path`, so the fallback must remain).
-  test('phase-boundary prefers Kimi tool_input.path when both fields are present (#2752)', () => {
-    const hookPath = path.join(HOOKS_DIR, 'msd-phase-boundary.sh');
-    // Suppression repro: a real .planning/ write WITH a decoy non-empty file_path.
-    const suppressionInput = JSON.stringify({
-      tool_name: 'kimi_cli.tools.file:StrReplaceFile',
-      tool_input: { path: '.planning/STATE.md', file_path: 'unrelated.txt', edit: { old: 'a', new: 'b' } }
-    });
-
-    const suppressionResult = spawnHook(hookPath, {
-      input: suppressionInput,
-      encoding: 'utf-8',
-      cwd: tmpDir,
-    });
-
-    assert.strictEqual(suppressionResult.status, 0, `Should exit 0: ${suppressionResult.stderr}`);
-    const suppressionParsed = JSON.parse(suppressionResult.stdout);
-    assert.strictEqual(suppressionParsed.hookSpecificOutput.planning_modified, true,
-      'A real .planning/STATE.md write must NOT be suppressed by a model-supplied decoy file_path (#2752)');
-    assert.strictEqual(suppressionParsed.hookSpecificOutput.file_path, '.planning/STATE.md',
-      'path must win over file_path — the runtime executes on path, file_path is the fallback');
-
-    // Fabrication repro: a write ELSEWHERE with a decoy file_path pointing into .planning/.
-    const fabricationInput = JSON.stringify({
-      tool_name: 'kimi_cli.tools.file:StrReplaceFile',
-      tool_input: { path: 'src/index.ts', file_path: '.planning/STATE.md', edit: { old: 'a', new: 'b' } }
-    });
-
-    const fabricationResult = spawnHook(hookPath, {
-      input: fabricationInput,
-      encoding: 'utf-8',
-      cwd: tmpDir,
-    });
-
-    assert.strictEqual(fabricationResult.status, 0, `Should exit 0: ${fabricationResult.stderr}`);
-    // No reminder emitted — the write was to src/index.ts; the decoy .planning/
-    // file_path must NOT fabricate a reminder for a file never touched.
-    assert.strictEqual(fabricationResult.stdout, '',
-      'A decoy .planning/ file_path must NOT fabricate a reminder when the real path is outside .planning/ (#2752)');
-  });
-
-  test('phase-boundary negative control: Kimi path outside .planning/ stays silent (#2304)', () => {
-    const hookPath = path.join(HOOKS_DIR, 'msd-phase-boundary.sh');
-    const input = JSON.stringify({
-      tool_name: 'kimi_cli.tools.file:StrReplaceFile',
-      tool_input: { path: 'src/index.ts', edit: { old: 'a', new: 'b' } }
-    });
-
-    const result = spawnHook(hookPath, {
-      input,
-      encoding: 'utf-8',
-      cwd: tmpDir,
-    });
-
-    assert.strictEqual(result.status, 0, `Should exit 0: ${result.stderr}`);
-    assert.equal(result.stdout.trim(), '',
-      'non-.planning/ Kimi writes must produce no output');
-  });
 });
 
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