075e984fb5
Folds the 2026-06-26 vision-revision pressure-test into the canonical docs. The spec moves from Proposed to Ratified; the decisions it produced land in the docs it said it would amend, with ADRs recording each load-bearing reversal. - README.md: reframe north star (AI-era contact-center engine, not Asterisk successor); persona; revised pillars (add data-ownership, demote WASM, promote spend-control); update 'what it is/isn't'. - ARCHITECTURE.md: replace three-plane framing with fused per-call vertical + composable horizontal platform; remove control<->media hot-path gRPC hop; make the agent tap the central interface; add DX spine + GUI-as-API-client + k8s declarative/operational model. Also: 'too slow to police' -> 'too slow to enforce' (terminology). - PORT_PLAN.md: recharacterize as capability checklist (not template); graduate contact-center capabilities to first-class domain; Rust-native trunk SIP rows; WASM demoted; thin-slice + capability ladder phasing. - ADR-0001: marked Superseded by ADR-0003. - ADR-0002 (new): north star + fused per-call core. - ADR-0003 (new): Rust-native trunk SIP, no SBC shield. - ADR-0004 (new): GPL-3.0-or-later license. - ADR-0005 (new): Valkey as event bus + state store. - ADR-0006 (new): WebRTC-first ingress; SIP endpoint deferred. - vision-revision spec: status -> Ratified 2026-06-26.
49 lines
2.4 KiB
Markdown
49 lines
2.4 KiB
Markdown
# ADR-0004 — License: GPL-3.0-or-later
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- **Status:** Accepted
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- **Date:** 2026-06
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- **Closes:** the license open-decision carried in the founding docs
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## Context
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The founding docs (and the [vision-revision](../superpowers/specs/2026-06-26-vision-revision-design.md)
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open-decisions list) left license open. rutster is a self-hosted engine whose competitor set
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([ADR-0002](0002-north-star-and-fused-core.md)) includes cloud CCaaS that could *wrap-and-resell*
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it as a managed service — the classic strong-copyleft concern.
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## Decision
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**GPL-3.0-or-later.**
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Strong copyleft (requires source-sharing on binary conveyance), OSI-clean, modernized one notch
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over Asterisk's GPLv2+. `SPDX-License-Identifier: GPL-3.0-or-later`.
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## Alternatives considered
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- **AGPL-3.0-or-later** — *considered.* AGPL additionally closes the network-use / SaaS loophole:
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GPLv3 §13 states network use is **not** conveyance (so a hosted service triggers no
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source-sharing obligation); AGPL §13 fixes that, compelling source disclosure for network-served
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use. Given that cloud CCaaS is a named competitor, AGPL would harder-prevent a vendor from
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hosting rutster-as-managed-CCaaS without contributing back.
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- **GPL-3.0-or-later was chosen** in favor of simplicity and lower downstream-embedding friction
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(operators and tooling/library authors integrating rutster avoid AGPL's network-trigger), while
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remaining strong copyleft against proprietary forking of the engine itself.
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## Trade-off accepted deliberately
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A cloud competitor *can* host GPL rutster and owe source only on binary distribution, which for a
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hosted service may be nothing. The license is the **floor**, not the moat: the wedge — self-host
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+ data-ownership + one auditable boundary + operational simplicity + data-ownership as a buying
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criterion — is the actual reason operators self-host rather than wrap.
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If cloud-wrap becomes a demonstrated threat, **re-evaluate AGPL-3.0-or-later** (this ADR's
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"or-later" clause permits that transition cleanly, since GPL-3.0-or-later is a strict subset of
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AGPL-3.0-or-later for recipients).
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## Consequences
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- **Positive:** OSI-clean strong copyleft in the Asterisk lineage; compatible with the project's
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dependencies (Valkey BSD-3-Clause per [ADR-0005](0005-event-bus.md); Rust-ecosystem MIT/Apache crates).
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- **Negative:** the network-use loophole is open **by design choice** — mitigated by the wedge, not
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the license.
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