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diff --git a/stacks/crdop/docs/LICENSE-USAGE.md b/stacks/crdop/docs/LICENSE-USAGE.md new file mode 100644 index 0000000..84ad5ff --- /dev/null +++ b/stacks/crdop/docs/LICENSE-USAGE.md @@ -0,0 +1,116 @@ +# CRDOP license and usage rights + +**CRDOP** (MAX25-SoftModem) is **free software** under the **GNU General Public License version 3** (GPL-3.0-or-later). + +License files: + +| File | Scope | +|------|-------| +| [stacks/crdop/LICENSE](../LICENSE) | CRDOP subproject | +| [LICENSE](../../../LICENSE) | MainAX25-Stack repository root | + +--- + +## Summary (not legal advice) + +GPLv3 grants everyone — **private individuals and commercial entities** — the right to: + +| Right | Meaning | +|-------|---------| +| **Use** | Run CRDOP for any purpose (personal, club, business, government) | +| **Study** | Read and learn from source code | +| **Modify** | Change code to suit your needs | +| **Distribute** | Share originals or modified versions | +| **Commercial use** | Sell services, products, or support built on CRDOP | + +**Copyleft obligation:** When you **distribute** CRDOP (or a combined work based on it), you must: + +1. Provide **corresponding source** (or a written offer valid ≥ 3 years). +2. License derivatives under **GPLv3** (or later, per "or later" clause). +3. Preserve copyright notices and license text. +4. Document changes if you modify files. +5. Pass through patent retaliation and anti-tivoization terms as GPLv3 requires. + +**No warranty:** Software is provided **AS IS** — no implied fitness for a particular purpose. + +--- + +## Private use + +| Scenario | Obligation | +|----------|------------| +| Run CRDOP on your own computer | None beyond GPLv3 acceptance | +| Modify for personal use only | No distribution → no source-offer obligation | +| Internal company use (no binary redistribution) | Same as private — no copyleft trigger until you distribute | + +--- + +## Commercial use + +| Scenario | Obligation | +|----------|------------| +| Sell pre-built PCs with CRDOP installed | Provide source (or written offer) to recipients | +| Ship hardware interface **with** CRDOP binaries | GPL applies to distributed software; hardware schematics you create separately may use another license if they are not a derivative of the GPL code | +| SaaS / hosted service (no binary to users) | AGPL would impose network copyleft — **CRDOP is GPL, not AGPL**; consult counsel for your deployment model | +| OEM integration in a product | Ensure GPL compliance for all distributed GPL components; document how users obtain source | + +**Practical path:** Include `LICENSE`, offer source at your support URL or ship `stacks/crdop/` tree, and state "based on CRDOP (GPLv3)". + +--- + +## Combined works (MAX25-Stack) + +MAX25-Stack bundles CRDOP with daemon, terminal, and plugins. Distribution of the **combined stack** triggers GPLv3 obligations for the GPL-licensed portions. Other components may carry their own licenses — check root `LICENSE` and per-directory notices. + +| Component | Typical license | +|-----------|-----------------| +| `stacks/crdop/` | GPL-3.0-or-later | +| MAX25 daemon / terminal | GPL-3.0-or-later (repository default) | + +--- + +## What you may not do + +| Restriction | Reason | +|-------------|--------| +| Relicense CRDOP under proprietary terms | GPLv3 copyleft | +| Remove copyright / license notices | GPLv3 §4 | +| Imply warranty or liability from authors | GPLv3 §15–16 | +| Distribute without source (when distributing binaries) | GPLv3 §6 | + +Patent suits against GPL users can terminate your license (GPLv3 §8). + +--- + +## ARDOP-plugin (separate) + +**ARDOP-plugin** is an optional MAX25-Stack registry entry — **not** part of the CRDOP GPLv3 tree. + +| Item | Policy | +|------|--------| +| CRDOP coupling | **None** — third-party ARDOP host software | +| Registry | [plugins/external/ardop/README.md](../../../plugins/external/ardop/README.md) | + +CRDOP GPLv3 obligations apply to **CRDOP code**, not to operator ARDOP host software. + +--- + +## Contributor grants + +By contributing to `stacks/crdop/`, you agree that contributions are licensed under **GPL-3.0-or-later**, consistent with the repository [CONTRIBUTING.md](../../../CONTRIBUTING.md). + +--- + +## Full license text + +- Online: <https://www.gnu.org/licenses/gpl-3.0.html> +- In tree: [stacks/crdop/LICENSE](../LICENSE) · [LICENSE](../../../LICENSE) + +--- + +## Related + +| Doc | Topic | +|-----|--------| +| [docs/CRDOP.md](../../../docs/CRDOP.md) | Project rule §5 License | +| [INDEX.md](INDEX.md) | Documentation index | |