diff --git a/hooks/scripts/inject-okr-context.mjs b/hooks/scripts/inject-okr-context.mjs
index faeb3fe..f97e771 100644
--- a/hooks/scripts/inject-okr-context.mjs
+++ b/hooks/scripts/inject-okr-context.mjs
@@ -2,10 +2,12 @@
 
 // inject-okr-context.mjs
 // Event: UserPromptSubmit
-// Purpose: Inject OKR organization context from .claude/okr.local.md and .claude/okr/ tree.
-// Zero npm dependencies. Target execution: <50ms.
+// Purpose: Inject the core OKR organization context from .claude/okr.local.md
+// (or the home org profile) plus ONE pointer to the second-brain index.md.
+// Cycle/history/context retrieval is on-demand via the okr-second-brain-search
+// skill — no longer pre-injected here. Zero npm dependencies. Target: <50ms.
 
-import { readFileSync, existsSync, readdirSync } from 'node:fs';
+import { readFileSync, existsSync } from 'node:fs';
 import { join } from 'node:path';
 import { homedir } from 'node:os';
 import { parseFrontmatter } from '../../lib/frontmatter.mjs';
@@ -45,8 +47,9 @@ if (rawPrompt) {
 // Hybrid org-profile resolution (most-specific-wins): project-local overrides
 // the machine-global home profile. The home path is the Fase 3 migration target;
 // this read is forward-compatible and stays inert until that file exists.
-// NOTE: only the org PROFILE resolves to home. The cycle/work tree scan
-// (okrDir, below) stays cwd-bound -- syklus data is always project-local.
+// NOTE: only the org PROFILE resolves to home. Cycle/work data stays cwd-bound
+// and is no longer pre-injected -- it is retrieved on-demand via the
+// okr-second-brain-search skill.
 const configPath = existsSync(projectConfigPath)
   ? projectConfigPath
   : (existsSync(homeConfigPath) ? homeConfigPath : null);
@@ -84,105 +87,23 @@ try {
   if (trygghet) parts.push(`Psykologisk trygghet: ${trygghet}`);
   if (linear) parts.push('Linear: aktivert');
 
-  // Scan .claude/okr/ directory tree (cap at 50 files)
-  const okrDir = join(cwd, '.claude', 'okr');
-  const dirParts = [];
-  let totalFiles = 0;
-
-  if (existsSync(okrDir)) {
-    try {
-      const topEntries = readdirSync(okrDir, { withFileTypes: true });
-      for (const entry of topEntries) {
-        if (!entry.isDirectory()) continue;
-        if (totalFiles >= 50) break;
-        try {
-          const subEntries = readdirSync(join(okrDir, entry.name), { withFileTypes: true });
-          const mdFiles = [];
-          const subDirs = [];
-          for (const sub of subEntries) {
-            if (totalFiles >= 50) break;
-            if (sub.isFile() && sub.name.endsWith('.md')) {
-              mdFiles.push(sub.name);
-              totalFiles++;
-            } else if (sub.isDirectory()) {
-              subDirs.push(sub.name);
-            }
-          }
-          // Enumerate nested subdirectories (e.g. syklus/T1-2026/)
-          for (const sd of subDirs) {
-            if (totalFiles >= 50) break;
-            try {
-              const nested = readdirSync(join(okrDir, entry.name, sd), { withFileTypes: true });
-              const nestedMd = [];
-              for (const n of nested) {
-                if (totalFiles >= 50) break;
-                if (n.isFile() && n.name.endsWith('.md')) {
-                  nestedMd.push(n.name);
-                  totalFiles++;
-                }
-              }
-              if (nestedMd.length > 0) {
-                dirParts.push(`${entry.name}/${sd}/ (${nestedMd.length} fil${nestedMd.length > 1 ? 'er' : ''}: ${nestedMd.join(', ')})`);
-              }
-            } catch { /* skip unreadable nested dirs */ }
-          }
-          if (mdFiles.length > 0) {
-            dirParts.push(`${entry.name}/ (${mdFiles.length} fil${mdFiles.length > 1 ? 'er' : ''}: ${mdFiles.join(', ')})`);
-          }
-        } catch { /* skip unreadable dirs */ }
-      }
-    } catch { /* .claude/okr/ scan failed — continue without */ }
-  }
-
-  // Scan historikk/ for archived cycle count
-  const histDir = join(okrDir, 'historikk');
-  const archivedCycles = [];
-  if (existsSync(histDir)) {
-    try {
-      const histEntries = readdirSync(histDir, { withFileTypes: true });
-      for (const entry of histEntries) {
-        if (entry.isDirectory()) {
-          archivedCycles.push(entry.name);
-        }
-      }
-    } catch { /* skip */ }
-  }
-
-  // List active cycle files
-  const cycleId = syklus;
-  const cycleParts = [];
-  if (cycleId) {
-    const cyclePath = join(okrDir, 'syklus', cycleId);
-    if (existsSync(cyclePath)) {
-      try {
-        const cycleEntries = readdirSync(cyclePath, { withFileTypes: true });
-        for (const e of cycleEntries) {
-          if (e.isFile() && e.name.endsWith('.md')) {
-            cycleParts.push(e.name);
-          }
-        }
-      } catch { /* skip */ }
-    }
-  }
-
-  // Build rich systemMessage
+  // Base context line from the core profile fields only. The directory-tree
+  // enumeration that used to live here (the :92-191 MOVE block) is removed:
+  // retrieval is now on-demand via the okr-second-brain-search skill, not
+  // pre-injected. The payload is therefore independent of file count. (SC5)
   let msg = `OKR-kontekst (fra .claude/okr.local.md): ${parts.join(', ')}.`;
 
-  if (dirParts.length > 0) {
-    msg += `\nTilgjengelige kontekstfiler: ${dirParts.join('; ')}.`;
-  }
+  // Resolve ONE pointer to the second-brain index.md, reusing most-specific-wins
+  // (project bundle preferred, else home bundle). Project root is cwd-bound
+  // (.claude/okr/); the home bundle root is ~/.claude/okr/org/ (two-root model).
+  const projectIndex = join(cwd, '.claude', 'okr', 'index.md');
+  const homeIndex = join(homedir(), '.claude', 'okr', 'org', 'index.md');
+  const indexPath = existsSync(projectIndex)
+    ? projectIndex
+    : (existsSync(homeIndex) ? homeIndex : null);
 
-  if (cycleParts.length > 0) {
-    msg += `\nAktive OKR-filer i syklus ${cycleId}: ${cycleParts.join(', ')}.`;
-  }
-
-  if (archivedCycles.length > 0) {
-    msg += `\nArkiverte sykluser (${archivedCycles.length}): ${archivedCycles.sort().join(', ')}.`;
-    msg += ' Bruk /okr:analyse for trendanalyse.';
-  }
-
-  if (dirParts.length > 0 || cycleParts.length > 0) {
-    msg += '\nBruk disse filene automatisk nar relevant — ikke be brukeren om a lime inn innhold som allerede finnes.';
+  if (indexPath) {
+    msg += `\nPersonlig OKF-kontekst finnes - sok wikien (skill: okr-second-brain-search) eller se ${indexPath}.`;
   }
 
   process.stdout.write(JSON.stringify({ systemMessage: msg }));
diff --git a/tests/inject-core-cap.test.mjs b/tests/inject-core-cap.test.mjs
new file mode 100644
index 0000000..c84e98e
--- /dev/null
+++ b/tests/inject-core-cap.test.mjs
@@ -0,0 +1,138 @@
+// inject-core-cap.test.mjs
+// Verifiserer hook-splitten (SC5): inject-okr-context emitterer kun kjerne-
+// kontekst + EN resolvert index.md-peker, ALDRI tre-enumerering. Beviser:
+//   (a) byte-cap < 512; (b) payload uavhengig av filantall (lite vs stort tre);
+//   (c) ingen konsept-filnavn lekker; (d) home-only -> home-bundle-sti i peker;
+//   (e) ingen '#'.
+// Spawner hooken som subprosess m/ kontrollert cwd + HOME. Zero npm deps.
+// Monster: tests/inject-okr-context.test.mjs + tre-bygger-helper.
+
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { execFileSync } from 'node:child_process';
+import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const HOOK = join(
+  dirname(fileURLToPath(import.meta.url)),
+  '..',
+  'hooks',
+  'scripts',
+  'inject-okr-context.mjs',
+);
+
+const OKR_PROMPT = JSON.stringify({ prompt: 'hjelp meg skrive OKR' });
+
+function makeProjectConfig(work, navn = 'CapTestOrg') {
+  const p = join(work, '.claude');
+  mkdirSync(p, { recursive: true });
+  writeFileSync(
+    join(p, 'okr.local.md'),
+    `---\nnavn: "${navn}"\ngjeldende: "T1-2026"\nsektor: "transport"\n---\n`,
+  );
+}
+
+// Idempotent paa index.md, additiv paa konsept-filer (0..count-1). Distinkte
+// filnavn (konseptfil-N) for lekkasje-testen.
+function makeProjectTree(work, count) {
+  const lvl = join(work, '.claude', 'okr', 'strategisk-kontekst');
+  mkdirSync(lvl, { recursive: true });
+  writeFileSync(
+    join(work, '.claude', 'okr', 'index.md'),
+    '# OKR-rot\n\nokf_version: kb-layout-2026-06\n',
+  );
+  for (let i = 0; i < count; i++) {
+    writeFileSync(join(lvl, `konseptfil-${i}.md`), `---\ntype: OKR\n---\n# K${i}\n`);
+  }
+}
+
+function makeHomeBundle(home, navn = 'HomeCapOrg') {
+  const org = join(home, '.claude', 'okr', 'org');
+  mkdirSync(org, { recursive: true });
+  writeFileSync(join(org, 'profil.md'), `---\nnavn: "${navn}"\n---\n`);
+  writeFileSync(join(org, 'index.md'), '# Org-rot\n\nokf_version: kb-layout-2026-06\n');
+}
+
+function runHook(cwd, home, input = OKR_PROMPT) {
+  return execFileSync('node', [HOOK], {
+    cwd,
+    env: { ...process.env, HOME: home },
+    input,
+    encoding: 'utf8',
+  });
+}
+
+function systemMessage(out) {
+  return JSON.parse(out).systemMessage;
+}
+
+function withDirs(fn) {
+  const home = mkdtempSync(join(tmpdir(), 'okrhome-'));
+  const work = mkdtempSync(join(tmpdir(), 'okrwork-'));
+  try {
+    fn(home, work);
+  } finally {
+    rmSync(home, { recursive: true, force: true });
+    rmSync(work, { recursive: true, force: true });
+  }
+}
+
+// (a) byte-cap < 512
+test('cap: systemMessage < 512 byte (utf8) selv med 50 konsept-filer', () => {
+  withDirs((home, work) => {
+    makeProjectConfig(work);
+    makeProjectTree(work, 50);
+    const msg = systemMessage(runHook(work, home));
+    const bytes = Buffer.byteLength(msg, 'utf8');
+    assert.ok(bytes < 512, `payload skal vaere < 512 B, var ${bytes}`);
+  });
+});
+
+// (b) invariant: lite (index+3) vs stort (index+50) tre -> byte-identisk payload.
+// SAMME work-dir i begge maalinger -> peker-stien er konstant; eneste variabel
+// er filantallet, som splitten skal gjore irrelevant.
+test('invariant: payload byte-identisk for lite og stort tre (ingen enumerering)', () => {
+  withDirs((home, work) => {
+    makeProjectConfig(work);
+    makeProjectTree(work, 3);
+    const small = systemMessage(runHook(work, home));
+    makeProjectTree(work, 50);
+    const large = systemMessage(runHook(work, home));
+    assert.equal(small, large, 'filantall skal ikke paavirke payload');
+  });
+});
+
+// (c) ingen konsept-filnavn enumerert
+test('ingen lekkasje: konsept-filnavn opptrer ikke i payload; peker bruker index.md', () => {
+  withDirs((home, work) => {
+    makeProjectConfig(work);
+    makeProjectTree(work, 5);
+    const msg = systemMessage(runHook(work, home));
+    assert.doesNotMatch(msg, /konseptfil-/, 'konsept-filnavn skal ikke enumereres');
+    assert.match(msg, /index\.md/, 'peker skal referere index.md');
+  });
+});
+
+// (d) home-only -> home-bundle index.md i peker
+test('home-only: peker bruker home-bundle index.md (~/.claude/okr/org/index.md)', () => {
+  withDirs((home, work) => {
+    makeHomeBundle(home); // tomt prosjekt, kun home
+    const msg = systemMessage(runHook(work, home));
+    assert.match(msg, /HomeCapOrg/, 'org leses fra home-profil');
+    assert.match(msg, /okr-second-brain-search/, 'peker nevner skillen');
+    const expected = join(home, '.claude', 'okr', 'org', 'index.md');
+    assert.ok(msg.includes(expected), `peker skal inneholde home-index-sti: ${expected}`);
+  });
+});
+
+// (e) ingen '#'
+test('ingen "#" i payload (peker + sti ASCII-rent)', () => {
+  withDirs((home, work) => {
+    makeProjectConfig(work);
+    makeProjectTree(work, 3);
+    const msg = systemMessage(runHook(work, home));
+    assert.doesNotMatch(msg, /#/, 'payload skal ikke inneholde "#"');
+  });
+});