A comprehensive 3GPP telecommunications skill that turns Claude into a senior telecom consultant — covering everything from GSM (1992) through 6G (Release 21).
This skill gives Claude deep, standards-grounded expertise across the full 3GPP ecosystem:
- All generations: 2G/GSM, 3G/UMTS, 4G/LTE, 5G NR, 5G-Advanced, 6G
- All releases: Phase 1 through Release 21, with detailed feature breakdowns
- Protocol stacks: PHY, MAC, RLC, PDCP, SDAP, RRC, NAS — with LTE vs NR differences
- Core network: EPC to 5GC/SBA evolution, all network functions (AMF, SMF, UPF, etc.)
- Deployment: Network planning, spectrum strategy, migration paths (NSA/SA options), O-RAN
- Security: Authentication (EPS-AKA, 5G-AKA), SUPI/SUCI, IMSI catcher analysis
- Practical consulting: Link budgets, cell planning, troubleshooting, interoperability
Deep protocol questions:
"Walk me through how a UE scans for and selects the best cell, from power-on to RRC Connected."
PHY layer precision:
"What sequence is used for PSS in 5G NR?" — correctly answers m-sequence (not Zadoff-Chu, which is a common AI hallucination)
Cross-generation comparisons:
"Explain the differences between LTE and 5G NR RRC state machines. What is RRC_INACTIVE?"
Security analysis:
"How does 5G's SUPI/SUCI mechanism protect against IMSI catchers? What vulnerabilities remain?"
Deployment planning:
"We're migrating from LTE/EPC to 5G on a budget. Walk me through the NSA vs SA options."
- Download
3gpp-expert.skillfrom Releases - Open it — Claude will prompt you to install
Copy the 3gpp-expert/ folder (containing SKILL.md and references/) into your Claude skills directory:
~/.claude/skills/3gpp-expert/
├── SKILL.md
└── references/
├── releases.md
├── phy-layer.md
└── working-groups.md
| File | Purpose |
|---|---|
SKILL.md |
Main skill instructions — 7 knowledge domains, critical PHY facts, response patterns, when to web search |
references/releases.md |
Detailed release-by-release reference (Phase 1 → Rel-21) with spec series table |
references/phy-layer.md |
NEW — PHY layer deep-dive: synchronization signals per RAT (PSS/SSS sequences), physical channels, reference signals, RACH preambles, channel mapping |
references/working-groups.md |
NEW — Full RAN/SA/CT Working Group structure with owned specs and typical topics |
3gpp-expert.skill |
Pre-packaged installable file |
| Era | Releases | Key Technologies |
|---|---|---|
| 2G | Phase 1 – Rel-98 | GSM, GPRS, EDGE |
| 3G | Rel-99 – Rel-7 | UMTS, WCDMA, HSPA, HSPA+ |
| 4G | Rel-8 – Rel-14 | LTE, LTE-A, LTE-A Pro, NB-IoT, C-V2X |
| 5G | Rel-15 – Rel-17 | NR, 5GC/SBA, NTN, RedCap, Sidelink |
| 5G-Adv | Rel-18 – Rel-19 | AI/ML, XR, Ambient IoT, MIMO evolution |
| 6G | Rel-20 – Rel-21 | Sub-THz, ISAC, AI-native, digital twins |
Covers TS 21–38 series with go-to specs for architecture (TS 23.501), NR radio (TS 38.xxx), NAS (TS 24.501), security (TS 33.501), and more.
Contributions are welcome! If you spot an inaccuracy, want to add coverage for a specific topic, or have suggestions:
- Open an issue describing the improvement
- Fork the repo and submit a PR
- Make sure any spec references are accurate and cite the correct TS/TR numbers
If you find this skill useful, consider supporting its development:
- GitHub Sponsors
- Star this repo to help others find it
MIT License — see LICENSE for details.
Built by @lugasia