Borrowing it
Nothing to install: this file belongs to thevoiceguy/siphon-ai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/thevoiceguy/siphon-ai/main/CLAUDE.mdgit clone --depth 1 https://github.com/thevoiceguy/siphon-aiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/thevoiceguy/siphon-ai/claude-md)<a href="https://agentmods.dev/instructions/thevoiceguy/siphon-ai/claude-md"><img src="https://agentmods.dev/badge/instructions/thevoiceguy/siphon-ai/claude-md.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.06842 | $0.06842 |
| Opus 5 | $0.03421 | $0.03421 |
| Sonnet 5 | $0.01368 | $0.01368 |
| Haiku 4.5 | $0.00684 | $0.00684 |
Grade C, and why
siphon-ai CLAUDE.md scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Tells the agent never to refusehighAnti-refusal
Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.
**Delivered since the original v1 cut** (no longer out of scope — these shipped and have their own docs/config): call recording (0.5.0), outbound origination + attended transfer (0.6.0/0.6.1), conferencing/mixing and med How it starts
The opening of the file, as written. The whole thing — 485 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Operating instructions for AI coding agents (Claude Code, Cursor, etc.) working in this repo. Read this file first, before any task. Re-check relevant sections before non-trivial changes.
For the what and why of this project, see docs/DEV_PLAN.md. This file is the how.
1. What SiphonAI Is (One Paragraph)
SiphonAI is a SIP-to-WebSocket media bridge written in Rust. It accepts inbound SIP calls (either as a trunk endpoint or as a registered phone on a PBX), streams the call's audio over a WebSocket to a developer-supplied server, and plays audio received back over that WebSocket into the call. It does not contain any AI code. AI is the WebSocket server's job. SiphonAI's job is the bridge: SIP signaling, RTP media, codec handling, jitter, barge-in, DTMF, hold/transfer — all wrapped in a clean WS protocol.
If you find yourself writing code that calls an AI provider (OpenAI, Anthropic, Deepgram, ElevenLabs, etc.), stop. That's the wrong layer. Ask the user.
2. Architecture in 60 Seconds
PBX/Trunk ──SIP/RTP──► SiphonAI ──WebSocket──► Developer's WS server (BYO AI)
│
├── siphon-rs (SIP stack — external dep)
├── forge-media (RTP, codecs, SDP — external dep)
└── our code (orchestration + WS protocol)
Two upstream Rust libraries do most of the heavy lifting:
- siphon-rs (https://github.com/thevoiceguy/siphon-rs) — RFC 3261 SIP stack. UAS, UAC, transactions, dialogs, REGISTER, REFER, auth.
- forge-media (https://github.com/thevoiceguy/forge-media) — RTP/RTCP, codecs (G.711/Opus), SDP (
forge-sdp), jitter buffer, DTMF, audio injection, VAD. - hep-rs (new, owned by us) — HEP3 codec, transport,
HepSinktrait. Used by all three of siphon-rs (SIP messages), forge-media (RTCP/QoS), and siphon-ai (logs/CDRs/events) to ship observability data to Homer.
All three are owned by the same author as SiphonAI. If you find a missing capability in any, the right answer is often a small PR upstream, not a workaround here. Ask the user before doing this.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago Changed · +4 lines · +81 tokens per session d3a06557155e
- 7d ago First seen · 481 lines · 6,761 tokens per session scan C e8d315588438
siphon-ai CLAUDE.md is an instructions file published in the GitHub repository thevoiceguy/siphon-ai (22 stars, last pushed 3d ago), licensed Apache-2.0. It adds 6,842 tokens to every session, about $0.0342 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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