diff --git a/context-runtime-profile.mjs b/context-runtime-profile.mjs
new file mode 100644
index 0000000..3b8aa83
--- /dev/null
+++ b/context-runtime-profile.mjs
@@ -0,0 +1,134 @@
+import { buildHeadroomRunObservation, resolveHeadroomMode } from './memind-headroom-policy.mjs';
+import {
+  buildContextBudgetResolvedEvent,
+  planContextBudget,
+  resolveContextBudgetMode,
+} from './context-budget.mjs';
+import { resolveMcpCompactMode } from './mcp-result-compactor.mjs';
+import {
+  buildRecallFusionResolvedEvent,
+  fuseRecallCandidates,
+  resolveRecallFusionMode,
+} from './recall-fusion.mjs';
+import { resolveZvecWorkspaceMode } from './memind-zvec-workspace.mjs';
+
+/** Recommended local shadow profile (observe-only, no behavior change). */
+export const CONTEXT_RUNTIME_SHADOW_ENV = Object.freeze({
+  MEMIND_HEADROOM_MODE: 'shadow',
+  MEMIND_CONTEXT_BUDGET_MODE: 'shadow',
+  MEMIND_RECALL_FUSION_MODE: 'shadow',
+  MEMIND_MCP_COMPACT_MODE: 'shadow',
+  MEMIND_ZVEC_WORKSPACE_MODE: 'shadow',
+});
+
+export function describeContextRuntimeProfile(env = process.env) {
+  return {
+    headroom: resolveHeadroomMode(env),
+    contextBudget: resolveContextBudgetMode(env),
+    recallFusion: resolveRecallFusionMode(env),
+    mcpCompact: resolveMcpCompactMode(env),
+    zvecWorkspace: resolveZvecWorkspaceMode(env),
+  };
+}
+
+export function isContextRuntimeShadowProfile(env = process.env) {
+  const profile = describeContextRuntimeProfile(env);
+  return Object.values(profile).every((mode) => mode === 'off' || mode === 'shadow');
+}
+
+export function isAnyContextRuntimeObservabilityEnabled(env = process.env) {
+  const profile = describeContextRuntimeProfile(env);
+  return Object.values(profile).some((mode) => mode !== 'off');
+}
+
+/**
+ * Offline simulation of gateway shadow events (no LLM / no DB).
+ * Mirrors agent-run-gateway appendEvent payloads for local evidence review.
+ */
+export function simulateContextRuntimeShadowEvents({
+  skillId = 'web',
+  userMessage = {
+    role: 'user',
+    content: [{ type: 'text', text: '帮我查一下 Memind context runtime 设计' }],
+    metadata: { displayText: '帮我查一下 Memind context runtime 设计' },
+  },
+  routing = {
+    route: 'agent_orchestration',
+    suggestedSkill: 'web',
+    reason: 'offline-shadow-simulation',
+  },
+  memoryContext = {
+    mode: 'shadow',
+    injectionEnabled: true,
+    memories: [
+      { label: '偏好', text: '用户偏好：喜欢简洁回答' },
+      { label: '偏好副本', text: '用户偏好：喜欢简洁回答' },
+      { label: '项目', text: '正在推进 Context Runtime 融合' },
+    ],
+  },
+  env = { ...CONTEXT_RUNTIME_SHADOW_ENV },
+} = {}) {
+  const events = {};
+  const resolvedSkill = routing?.suggestedSkill ?? routing?.suggested_skill ?? skillId;
+
+  if (resolveHeadroomMode(env) !== 'off') {
+    events.headroom_context_observed = buildHeadroomRunObservation({
+      skillId: resolvedSkill,
+      env,
+    });
+  }
+
+  if (resolveRecallFusionMode(env) !== 'off') {
+    const fusion = fuseRecallCandidates({
+      personalMemories: memoryContext?.memories ?? [],
+      episodicMemories: [],
+      temporalItems: [],
+      query: userMessage.metadata?.displayText ?? 'context runtime',
+      limit: 3,
+      env,
+    });
+    events.recall_fusion_resolved = buildRecallFusionResolvedEvent(fusion);
+  }
+
+  if (resolveContextBudgetMode(env) !== 'off') {
+    const displayText = userMessage.metadata?.displayText
+      ?? userMessage.content?.find?.((item) => item?.type === 'text')?.text
+      ?? '';
+    const budgetPlan = planContextBudget({
+      userTask: displayText,
+      skillPrompt: `[skill:${resolvedSkill}] 使用 web 搜索补充事实`,
+      memories: memoryContext?.injectionEnabled ? memoryContext.memories : [],
+      temporalText: '最近一周无日程冲突',
+      harnessEntries: [{ title: 'TKMind 用户偏好画像', content: '用户偏好：喜欢简洁回答' }],
+    }, { env });
+    events.context_budget_resolved = buildContextBudgetResolvedEvent(budgetPlan);
+  }
+
+  return {
+    profile: describeContextRuntimeProfile(env),
+    events,
+  };
+}
+
+export function validateContextRuntimeShadowEvents(simulation) {
+  const issues = [];
+  const { profile, events } = simulation ?? {};
+  if (!profile || !events) {
+    return { ok: false, issues: ['simulation missing profile or events'] };
+  }
+
+  if (profile.headroom !== 'off' && !events.headroom_context_observed) {
+    issues.push('headroom mode enabled but headroom_context_observed missing');
+  }
+  if (profile.contextBudget !== 'off' && !events.context_budget_resolved) {
+    issues.push('context budget mode enabled but context_budget_resolved missing');
+  }
+  if (profile.recallFusion !== 'off' && !events.recall_fusion_resolved) {
+    issues.push('recall fusion mode enabled but recall_fusion_resolved missing');
+  }
+  if (events.context_budget_resolved?.mode === 'shadow' && !events.context_budget_resolved?.duplicateCount) {
+    issues.push('expected shadow budget simulation to report duplicate fingerprints');
+  }
+
+  return { ok: issues.length === 0, issues };
+}
diff --git a/context-runtime-profile.test.mjs b/context-runtime-profile.test.mjs
new file mode 100644
index 0000000..94102cc
--- /dev/null
+++ b/context-runtime-profile.test.mjs
@@ -0,0 +1,45 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  CONTEXT_RUNTIME_SHADOW_ENV,
+  describeContextRuntimeProfile,
+  isContextRuntimeShadowProfile,
+  simulateContextRuntimeShadowEvents,
+  validateContextRuntimeShadowEvents,
+} from './context-runtime-profile.mjs';
+
+test('describeContextRuntimeProfile defaults to off', () => {
+  const profile = describeContextRuntimeProfile({});
+  assert.equal(profile.headroom, 'off');
+  assert.equal(profile.contextBudget, 'off');
+  assert.equal(profile.recallFusion, 'off');
+});
+
+test('isContextRuntimeShadowProfile accepts all-shadow bundle', () => {
+  assert.equal(isContextRuntimeShadowProfile(CONTEXT_RUNTIME_SHADOW_ENV), true);
+  assert.equal(isContextRuntimeShadowProfile({
+    ...CONTEXT_RUNTIME_SHADOW_ENV,
+    MEMIND_HEADROOM_MODE: 'active',
+  }), false);
+});
+
+test('simulateContextRuntimeShadowEvents emits gateway-shaped payloads', () => {
+  const simulation = simulateContextRuntimeShadowEvents();
+  assert.ok(simulation.events.headroom_context_observed);
+  assert.ok(simulation.events.context_budget_resolved);
+  assert.ok(simulation.events.recall_fusion_resolved);
+  assert.equal(simulation.events.headroom_context_observed.mode, 'shadow');
+  assert.equal(simulation.events.context_budget_resolved.mode, 'shadow');
+  const validation = validateContextRuntimeShadowEvents(simulation);
+  assert.equal(validation.ok, true, validation.issues?.join('; '));
+});
+
+test('simulateContextRuntimeShadowEvents respects off modes', () => {
+  const simulation = simulateContextRuntimeShadowEvents({
+    env: { MEMIND_HEADROOM_MODE: 'off', MEMIND_CONTEXT_BUDGET_MODE: 'off', MEMIND_RECALL_FUSION_MODE: 'off' },
+  });
+  assert.equal(simulation.events.headroom_context_observed, undefined);
+  assert.equal(simulation.events.context_budget_resolved, undefined);
+  assert.equal(simulation.events.recall_fusion_resolved, undefined);
+});
diff --git a/docs/context-runtime-local-dev.md b/docs/context-runtime-local-dev.md
new file mode 100644
index 0000000..f4372a8
--- /dev/null
+++ b/docs/context-runtime-local-dev.md
@@ -0,0 +1,92 @@
+# Context Runtime 本地离线开发
+
+> 不调用 LLM、不跑 phase3 live smoke。用户自测见文末清单。
+
+## 一键离线验证
+
+```bash
+node scripts/run-context-runtime-offline.mjs
+node scripts/run-goosed-v149-phase3-offline.mjs   # 含 v1.49 单测 + manifest drift
+```
+
+通过时应分别输出 **`CONTEXT_RUNTIME_OFFLINE_OK`** 与 **`GOOSE_V149_PHASE3_OFFLINE_OK`**。
+
+## 推荐 shadow 配置（仅观测，不改行为）
+
+写入 `.env.local`（或临时 export）：
+
+```bash
+MEMIND_HEADROOM_MODE=shadow
+MEMIND_CONTEXT_BUDGET_MODE=shadow
+MEMIND_RECALL_FUSION_MODE=shadow
+MEMIND_MCP_COMPACT_MODE=shadow
+MEMIND_ZVEC_WORKSPACE_MODE=shadow
+HEADROOM_OUTPUT_SHAPER=0
+```
+
+Bundle 常量见 `context-runtime-profile.mjs` → `CONTEXT_RUNTIME_SHADOW_ENV`。
+
+## 离线事件形状预览
+
+不启动 Portal 也可查看 gateway 将 emit 的 shadow 事件：
+
+```bash
+node -e "
+import { simulateContextRuntimeShadowEvents } from './context-runtime-profile.mjs';
+console.log(JSON.stringify(simulateContextRuntimeShadowEvents(), null, 2));
+"
+```
+
+期望事件类型：
+
+| event_type | 含义 |
+|---|---|
+| `headroom_context_observed` | headroom 路由/eligible 观测 |
+| `context_budget_resolved` | 注入预算 dedupe/drop 计划 |
+| `recall_fusion_resolved` | 多路 recall 融合统计 |
+
+## 组件探针（可选）
+
+```bash
+# headroom proxy 已起且 MEMIND_HEADROOM_MODE!=off
+node scripts/check-headroom-proxy-local.mjs
+
+# .zvec-grep 已 index
+node scripts/check-zvec-workspace-local.mjs
+
+# MCP compactor shadow/active 逻辑
+node scripts/check-mcp-compactor-local.mjs
+```
+
+## 用户自测清单（有 LLM 配额时）
+
+1. 确认 **未设置** `GOOSE_V149_ALLOW_REAL_LLM=1` 除非你明确要跑 live smoke
+2. 应用 shadow env，**重启 Portal**（`pnpm dev`）
+3. 发起 **一轮**普通 agent 对话（非 page-e2e）
+4. 查 DB 事件：
+
+```sql
+SELECT event_type, data_json, created_at
+FROM h5_agent_run_events
+WHERE run_id = '<run_id>'
+  AND event_type IN (
+    'headroom_context_observed',
+    'context_budget_resolved',
+    'recall_fusion_resolved'
+  )
+ORDER BY created_at;
+```
+
+5. 确认 `mode=shadow` 且 **聊天行为与 off 时一致**
+6. 若要 active 晋升：逐项改 `shadow` → `active`，每次只改一个开关
+
+## 禁止项
+
+- Agent **不得**自动设置 `GOOSE_V149_ALLOW_REAL_LLM=1` 或循环跑 phase2/phase3
+- **禁止** `headroom wrap` / `headroom learn` / `HEADROOM_OUTPUT_SHAPER=1`
+- 页面生成 / Page Data 轮次首期 **排除** headroom active
+
+## 相关文档
+
+- [context-runtime-harness-fusion-plan.md](./context-runtime-harness-fusion-plan.md)
+- [goose-v149-real-llm-gate.md](./goose-v149-real-llm-gate.md)
diff --git a/docs/goose-v149-canary.env.example b/docs/goose-v149-canary.env.example
index 64ec03c..491b71b 100644
--- a/docs/goose-v149-canary.env.example
+++ b/docs/goose-v149-canary.env.example
@@ -56,3 +56,10 @@ MEMORY_CANDIDATE_ENABLED=0
 # MEMIND_MCP_COMPACT_BUDGET_CHARS=4000
 # MEMIND_MCP_COMPACT_TTL_SECONDS=3600
 # MEMIND_RUNTIME_REDIS_URL=redis://127.0.0.1:6379/0
+
+# Context Runtime shadow observe-only bundle (see docs/context-runtime-local-dev.md)
+# MEMIND_HEADROOM_MODE=shadow
+# MEMIND_CONTEXT_BUDGET_MODE=shadow
+# MEMIND_RECALL_FUSION_MODE=shadow
+# MEMIND_MCP_COMPACT_MODE=shadow
+# MEMIND_ZVEC_WORKSPACE_MODE=shadow
diff --git a/scripts/run-context-runtime-offline.mjs b/scripts/run-context-runtime-offline.mjs
new file mode 100644
index 0000000..6adf16f
--- /dev/null
+++ b/scripts/run-context-runtime-offline.mjs
@@ -0,0 +1,125 @@
+#!/usr/bin/env node
+/**
+ * Context Runtime offline gate: unit tests + local probes, no LLM.
+ */
+import { spawnSync } from 'node:child_process';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import {
+  CONTEXT_RUNTIME_SHADOW_ENV,
+  describeContextRuntimeProfile,
+  simulateContextRuntimeShadowEvents,
+  validateContextRuntimeShadowEvents,
+} from '../context-runtime-profile.mjs';
+import { prepareGooseV149CheckEnv } from './goose-v149-canary.mjs';
+import { checkPassed, classifyCheckResult } from './goose-v149-check-result.mjs';
+
+const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');
+const checkEnv = prepareGooseV149CheckEnv({ ...process.env }, root);
+
+const unitChecks = [
+  {
+    name: 'context-runtime-profile',
+    command: [process.execPath, '--test', 'context-runtime-profile.test.mjs'],
+  },
+  {
+    name: 'context-runtime-modules',
+    command: [
+      process.execPath,
+      '--test',
+      'memind-headroom-policy.test.mjs',
+      'context-budget.test.mjs',
+      'recall-fusion.test.mjs',
+      'mcp-result-compactor.test.mjs',
+      'memind-zvec-workspace.test.mjs',
+    ],
+  },
+];
+
+const scriptChecks = [
+  { name: 'mcp-compactor-local', script: 'check-mcp-compactor-local.mjs' },
+  { name: 'headroom-proxy-local', script: 'check-headroom-proxy-local.mjs', optional: true },
+  { name: 'zvec-workspace-local', script: 'check-zvec-workspace-local.mjs', optional: true },
+];
+
+function runCommand(command) {
+  const [bin, ...args] = command;
+  const result = spawnSync(bin, args, {
+    cwd: root,
+    env: checkEnv,
+    encoding: 'utf8',
+  });
+  return {
+    ok: checkPassed(result),
+    outcome: classifyCheckResult(result),
+    stdout: result.stdout?.trim() ?? '',
+    stderr: result.stderr?.trim() ?? '',
+  };
+}
+
+function runScript(script) {
+  const result = spawnSync(process.execPath, [path.join(root, 'scripts', script)], {
+    cwd: root,
+    env: checkEnv,
+    encoding: 'utf8',
+  });
+  return {
+    ok: checkPassed(result),
+    outcome: classifyCheckResult(result),
+    stdout: result.stdout?.trim() ?? '',
+    stderr: result.stderr?.trim() ?? '',
+  };
+}
+
+function main() {
+  console.log('CONTEXT_RUNTIME_OFFLINE:');
+  console.log(`  profile=${JSON.stringify(describeContextRuntimeProfile(checkEnv))}`);
+  console.log(`  recommended_shadow=${JSON.stringify(CONTEXT_RUNTIME_SHADOW_ENV)}`);
+
+  const simulation = simulateContextRuntimeShadowEvents({ env: { ...CONTEXT_RUNTIME_SHADOW_ENV } });
+  const validation = validateContextRuntimeShadowEvents(simulation);
+  console.log(`  shadow_simulation=${validation.ok ? 'OK' : 'FAIL'}`);
+  if (!validation.ok) {
+    console.error(validation.issues.join('\n'));
+    process.exit(1);
+  }
+  console.log(`  sample_events=${Object.keys(simulation.events).join(',')}`);
+
+  const failures = [];
+
+  for (const check of unitChecks) {
+    const result = runCommand(check.command);
+    console.log(`[context-runtime-offline] ${result.outcome} ${check.name}`);
+    if (!result.ok) {
+      failures.push(check.name);
+      if (result.stderr) console.error(result.stderr);
+    }
+  }
+
+  for (const check of scriptChecks) {
+    const result = runScript(check.script);
+    const skipped = /SKIP:/.test(result.stdout);
+    if (skipped && check.optional) {
+      console.log(`[context-runtime-offline] SKIP ${check.name}`);
+      continue;
+    }
+    console.log(`[context-runtime-offline] ${result.outcome} ${check.name}`);
+    if (!result.ok && !check.optional) {
+      failures.push(check.name);
+      if (result.stderr) console.error(result.stderr);
+    } else if (!result.ok && check.optional) {
+      console.log(`[context-runtime-offline] WARN ${check.name} (optional probe failed)`);
+    }
+  }
+
+  if (failures.length) {
+    console.error(`CONTEXT_RUNTIME_OFFLINE_FAIL: ${failures.join(', ')}`);
+    process.exit(1);
+  }
+
+  console.log('CONTEXT_RUNTIME_OFFLINE_OK');
+  console.log('  self-test: docs/context-runtime-local-dev.md');
+}
+
+main();
diff --git a/scripts/run-goosed-v149-phase3-offline.mjs b/scripts/run-goosed-v149-phase3-offline.mjs
index 6ef8602..bbb0731 100644
--- a/scripts/run-goosed-v149-phase3-offline.mjs
+++ b/scripts/run-goosed-v149-phase3-offline.mjs
@@ -48,15 +48,8 @@ const checks = [
     required: true,
   },
   {
-    name: 'context-runtime-unit',
-    command: [
-      process.execPath,
-      '--test',
-      'memind-headroom-policy.test.mjs',
-      'context-budget.test.mjs',
-      'recall-fusion.test.mjs',
-      'mcp-result-compactor.test.mjs',
-    ],
+    name: 'context-runtime-offline',
+    script: 'run-context-runtime-offline.mjs',
     required: true,
   },
 ];