ADR-0007 (rent the trunk) + ADR-0008 (FOB/green-zone doctrine) propagation
into the narrative docs that orient contributors + readers. No code changes.
README:
- Wedge bullet 2: 'one secure auditable boundary' now lists media + local
reflexes + spend + tap + audit (was: trunk termination + media + spend).
Adds the honest caveat that PSTN media inside the boundary is the on-prem
*graduation* (ADR-0007), not a day-one claim.
- 'Is / isn't': 'isn't a TDM/PSTN-hardware PBX — *and not a SIP stack.*'
No first-party SIP (ADR-0007). PSTN reach is rented transport.
- Memory-safety pillar: 'rutster parses no SIP at all' — entire first-party
wire surface is WebRTC/RTP/SRTP + WebSocket tap/ingress, all memory-safe
Rust. The carrier-SIP interop tail lives outside the trust boundary.
- Spearhead step 5: 'Add a real phone number via rented transport' (was:
'Replace WebRTC ingress with a real PSTN trunk call'). Re-aims at the
AI-telephony frontier; no first-party SIP stack.
- References: 0007 supersedes 0003 in the highlighted ADR list.
ARCHITECTURE:
- New 'FOB and the green zone' section after the fused-vertical framing —
names the build-vs-reuse doctrine with the FOB member list + green-zone
member list, and restates memory-safety precisely ('FOB is 100%
memory-safe Rust; the green zone is trusted OSS kept outside the
boundary — not an over-claim that every byte is Rust').
- 'Inside the boundary': 'Carrier trunk — rented transport, not first-party'
replaces 'Trunk SIP termination — Rust-native.' PSTN audio arrives as
a media-leg ingress from a rented CPaaS raw-media fork or an out-of-tree
SBC for on-prem sovereignty.
- Biggest technical risk: 'No longer the SIP stack — because rutster no
longer builds one.' Retires ADR-0003's named schedule risk; redirects
to 'the reflex loop itself' (turn-taking, VAD-driven barge-in, jitter,
pacing) — which is also the differentiator.
PORT_PLAN:
- Design rule 4: 'rent it, don't own it' replaces ADR-0003's 'Rust-native
trunk SIP, no SBC shield.' ADR-0007 restores the rule's original instinct.
- SIP signaling (trunk) row: disposition flipped to 🔌 Rented / out-of-tree.
- Outbound registration row: disposition flipped to 🔌 Rented / out-of-tree
(handled by the rented transport or out-of-tree SBC; rutster parses no SIP).
- Spend/abuse engine row: 'co-located with call origination + the tap inside
the boundary' (was: 'co-located with trunk termination'). rutster mediates
both the provider call-control API and the brain tap — the brain never
holds the wire.
- Spearhead step 5: 'Add a real phone number via rented transport.'
- Open decisions: SIP line updated to 'Re-decided — ADR-0007.'
AGENTS.md:
- ADR list: adds 0007 and 0008 with annotations; marks 0003 as superseded
by 0007.
- Key decisions to respect: prepends the FOB/green-zone doctrine as the
*the* build-vs-reuse rule. 'When in doubt, default to green zone — the
FOB earns its members, it doesn't collect them. This is why the trunk is
rented (ADR-0007) and Valkey reused (ADR-0005), not rebuilt. Don't pull
green-zone plumbing into the core.'
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.
Record the SIP edge decision and align the docs:
- docs/adr/0001-sip-strategy.md: layered strategy (own Rust parser, rent the
interop tail via a Kamailio + rtpengine SBC, grow native core behind the shield);
pjproject FFI explicitly rejected for breaking the memory-safety thesis at the
most exposed seam.
- PORT_PLAN §1 + open decisions: SIP row updated to the decided strategy.
- ARCHITECTURE: "biggest technical risk" now points at ADR-0001.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C2bfD7MkqEdfnMXxXBu456
Establish rutster — a memory-safe, API-first, security-first telephony
platform; spiritual successor to Asterisk for the WebRTC/microservices era.
- README: project framing, design pillars, open decisions
- docs/ARCHITECTURE.md: three-plane (control/media/app) model
- docs/PORT_PLAN.md: every Asterisk subsystem mapped to a disposition
(core / WASM-plugin / service / edge-FFI / dropped / replaced) with rationale
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C2bfD7MkqEdfnMXxXBu456
