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ProblemMap/GlobalFixMap/Cloud_Serverless/secrets_rotation.md
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ProblemMap/GlobalFixMap/Cloud_Serverless/secrets_rotation.md
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# Secrets Rotation and Key Fencing for Zero Downtime
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A practical runbook to rotate API keys, signing secrets, and JWKS without breaking RAG pipelines or agent flows. Implements dual-accept windows, kid tagging, cache fences, and rollback so rotations are invisible to users and stable under load.
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## When to use this page
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* Incoming 401/403 spikes during deploys or scale-out.
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* Webhook verification fails after a provider rotates its signing secret.
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* Mixed keys across regions or functions after a partial rollout.
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* Long-lived workers holding stale secrets in memory.
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* SOC or policy requires periodic rotation with audit.
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## Open these first
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* Boot ordering and safe deploy windows: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md)
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* Avoid state loops during changeover: [Deployment Deadlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md)
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* First-call crashes after release: [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)
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* Lock tool schemas and reduce header bloat: [Prompt Injection](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)
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* Trace and prove what snippet was used: [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md) · Contract payloads: [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
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* Live probes and rollback drills: [Live Monitoring for RAG](https://github.com/onestardao/WFGY/blob/main/ProblemMap/ops/live_monitoring_rag.md) · [Debug Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/ops/debug_playbook.md)
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## Acceptance targets
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* Zero user-visible errors during the rotation window. No p95 increase.
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* 0 auth failures in synthetic probes across all regions and paths.
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* Old secret fully revoked within the planned TTL and verified by logs.
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* For RAG: no citation loss and ΔS(question, retrieved) ≤ 0.45 on the probe set after rotation.
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---
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## The two-keys-live pattern
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Always rotate with two keys in play: the current key used for signing and a next key accepted for verification. Tag every credential with a key id so validation does not guess.
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**Key rules**
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1. Always include a stable kid on every token or signature.
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2. Verify against `active_kids = {current, next}`. Sign with `current` only.
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3. Flip in one step by promoting `next → current` when error rate is flat.
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4. Revoke the old key after caches drain and long jobs finish.
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**Minimal KV schema**
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```json
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{
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"secrets_epoch": "2025-08-27T12:00:00Z",
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"active": { "kid": "k_2025_08a", "secret_ref": "sm://wfgyp/prod/k_2025_08a" },
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"next": { "kid": "k_2025_09a", "secret_ref": "sm://wfgyp/prod/k_2025_09a" },
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"accept_kids": ["k_2025_08a", "k_2025_09a"],
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"revoke_after_s": 259200,
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"notes": "roll weekly; accept_kids must be length 2 max"
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}
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```
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**HTTP header examples**
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```
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Authorization: Bearer <access_token_with_kid>
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X-Key-Id: k_2025_08a
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```
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For JOSE tokens, put `kid` in the header. For HMAC signatures, include `X-Key-Id`.
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---
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## Zero-downtime rotation timeline
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**T-24h**
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* Create `next` in your secret manager.
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* Update `accept_kids = {current, next}`.
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* Push config to all regions and functions. Do not sign with next yet.
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**T-0**
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* Start signing with `current`. Keep accepting both.
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* Warm all regions. Run probes for 10 minutes.
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* Flip signer to `next` when probes are flat.
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**T+1h to T+72h**
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* Keep accepting both while streams drain and long jobs finish.
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* Watch auth errors by `kid`.
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* After TTL, remove `current` from `accept_kids` and revoke it in the secret manager.
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**Rollback**
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* If errors rise after the flip, restore signer to the previous `current`. Leave accept set unchanged.
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---
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## Long-lived workers and caches
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* Serverless functions may cache secrets in memory. Read secrets on each invocation or attach an `If-Modified-Since` check with a short TTL.
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* Edge and CDN caches can pin config. Add `secrets_epoch` to cache keys or use a config version header.
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* For JWKS, publish both public keys and set short cache-control. Clients must refresh on `kid` miss.
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Open: [Edge Cache Invalidation](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Cloud_Serverless/edge_cache_invalidation.md)
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---
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## Webhook secret rotation
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* Accept two signatures. Verify first with `kid` if provided. If not, attempt both only inside the rotation window.
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* Return a 2xx with a deprecation header to prompt senders to upgrade keys.
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* Log the `kid` used for every valid request and alert when legacy `kid` drops below a threshold.
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---
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## Third-party provider keys
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* Inject provider API keys from a secret manager at request time. Never bake into build artifacts.
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* Keep a per-provider `accept_kids` and test with small traffic shadow before promoting.
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* If a provider rotates without `kid`, schedule a short freeze window and fall back to a secondary provider if available.
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Related ops: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md) · [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)
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---
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## Observability you must add
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* Counters of 401/403 by `route`, `region`, and `kid`.
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* Ratio of requests verified by current vs next.
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* Time to first successful verification with `next` in each region.
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* Number of long-lived executions running past the flip time.
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* JWKS cache hit and miss per `kid`.
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---
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## CI policy to prevent unsafe rotations
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Fail the build when any of the following is true:
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1. `accept_kids` does not contain exactly two values.
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2. `next.secret_ref` is missing or unreadable.
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3. `revoke_after_s` is not set or exceeds the policy maximum.
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4. Routes that verify webhooks are not wired to read `X-Key-Id` or JOSE `kid`.
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---
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## Copy-paste verifier for serverless functions
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```txt
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On cold start:
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1. Fetch LIMITS.json and SECRETS.json.
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2. Pin {accept_kids, active.kid} to memory with TTL = 60s.
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3. Expose verify(req):
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- extract kid from header or token header.
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- if kid in accept_kids → choose secret by kid and verify.
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- else refresh secrets and retry once, then fail.
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On each request:
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- If now - secrets_cache_ts > 60s → refresh in the background.
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- Emit metric: {route, region, kid_used, verified=true|false}.
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```
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---
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## Typical failure patterns → exact fix
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* **Only one key accepted during rollout**
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Old workers keep signing while new verifiers reject. Add dual-accept and reduce cache TTL.
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Open: [Deployment Deadlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md)
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* **Webhook fails because sender changed secret before receivers**
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Allow two secrets, prefer `kid` when present. Add retry with jitter and short backoff.
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Open: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md)
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* **Large headers during rotation**
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Multiple auth headers overflow 8–16 KB. Collapse to one `X-Key-Id` and one signature.
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Open: [Prompt Injection](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)
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* **Silent partial revocation**
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Some regions still accept old key due to pinned caches. Force refresh and invalidate edge caches by `secrets_epoch`.
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Open: [Edge Cache Invalidation](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Cloud_Serverless/edge_cache_invalidation.md)
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---
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## Verification checklist
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* Blue-green probe calls succeed with both keys before the flip.
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* After flip, 95 percent of traffic verifies with `next` within 10 minutes.
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* After revoke, zero successful verifications with old `kid`.
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* RAG probe answers remain unchanged and pass ΔS ≤ 0.45.
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---
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### 🔗 Quick-Start Downloads (60 sec)
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| Tool | Link | 3-Step Setup |
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| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------- |
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| **WFGY 1.0 PDF** | [Engine Paper](https://github.com/onestardao/WFGY/blob/main/I_am_not_lizardman/WFGY_All_Principles_Return_to_One_v1.0_PSBigBig_Public.pdf) | 1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + \<your question>” |
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| **TXT OS (plain-text OS)** | [TXTOS.txt](https://github.com/onestardao/WFGY/blob/main/OS/TXTOS.txt) | 1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly |
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---
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### 🧭 Explore More
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| Module | Description | Link |
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| ------------------------ | ---------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
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| WFGY Core | WFGY 2.0 engine is live: full symbolic reasoning architecture and math stack | [View →](https://github.com/onestardao/WFGY/tree/main/core/README.md) |
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| Problem Map 1.0 | Initial 16-mode diagnostic and symbolic fix framework | [View →](https://github.com/onestardao/WFGY/tree/main/ProblemMap/README.md) |
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| Problem Map 2.0 | RAG-focused failure tree, modular fixes, and pipelines | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md) |
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| Semantic Clinic Index | Expanded failure catalog: prompt injection, memory bugs, logic drift | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/SemanticClinicIndex.md) |
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| Semantic Blueprint | Layer-based symbolic reasoning & semantic modulations | [View →](https://github.com/onestardao/WFGY/tree/main/SemanticBlueprint/README.md) |
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| Benchmark vs GPT-5 | Stress test GPT-5 with full WFGY reasoning suite | [View →](https://github.com/onestardao/WFGY/tree/main/benchmarks/benchmark-vs-gpt5/README.md) |
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| 🧙♂️ Starter Village 🏡 | New here? Lost in symbols? Click here and let the wizard guide you through | [Start →](https://github.com/onestardao/WFGY/blob/main/StarterVillage/README.md) |
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---
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> 👑 **Early Stargazers: [See the Hall of Fame](https://github.com/onestardao/WFGY/tree/main/stargazers)** — <img src="https://img.shields.io/github/stars/onestardao/WFGY?style=social" alt="GitHub stars"> ⭐ [WFGY Engine 2.0](https://github.com/onestardao/WFGY/blob/main/core/README.md) is already unlocked. ⭐ Star the repo to help others discover it and unlock more on the [Unlock Board](https://github.com/onestardao/WFGY/blob/main/STAR_UNLOCKS.md).
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<div align="center">
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[](https://github.com/onestardao/WFGY)
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[](https://github.com/onestardao/WFGY/tree/main/OS)
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[](https://github.com/onestardao/WFGY/tree/main/OS/BlahBlahBlah)
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[](https://github.com/onestardao/WFGY/tree/main/OS/BlotBlotBlot)
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[](https://github.com/onestardao/WFGY/tree/main/OS/BlocBlocBloc)
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[](https://github.com/onestardao/WFGY/tree/main/OS/BlurBlurBlur)
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[](https://github.com/onestardao/WFGY/tree/main/OS/BlowBlowBlow)
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</div>
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**Next page to write**: `ProblemMap/GlobalFixMap/Cloud_Serverless/multi_region_routing.md`
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