Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/webhook-co/webhookWrote 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/rules/webhook-co/webhook/constitution)<a href="https://agentmods.dev/rules/webhook-co/webhook/constitution"><img src="https://agentmods.dev/badge/rules/webhook-co/webhook/constitution/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/webhook-co/webhook/constitution"><img src="https://agentmods.dev/badge/rules/webhook-co/webhook/constitution.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00452 | $0.00452 |
| Opus 5.5 | $0.00181 | $0.00181 |
| Sonnet 5.5 | $0.00090 | $0.00090 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
constitution scanned grade A with 0 findings 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Constitution — non-negotiables
Durable principles for this repository. Design for them from day one; they are not bolt-ons.
- Compliance-by-design. Encryption in transit and at rest; secrets in a KMS; append-only, hash-chained audit log; Postgres RLS tenant isolation; region pinning; PII/PHI scrubbed from logs.
- MCP / AI-native parity. Every capability is reachable identically from CLI / API / web / MCP.
- Private-by-default. Nothing is public, listed, or shared unless explicitly made so.
- Cookieless ingestion on a separate apex. Ingestion and the CLI tunnel live on
wbhk.my: cookieless, no CORS, path-token routing,404for unknown tokens. Never serve ingestion from a primary application subdomain. - Standard-Webhooks-native. Signing/verification follow Standard Webhooks (send and receive). Do not hand-roll signature schemes.
- Open-core boundary. Open core is Apache-2.0; proprietary code is fenced into
ee/. Open-core code must not depend onee/. - Transparent pricing (qualitative). Keep event metering accurate and single-dimension; never add hidden per-step counters. (No prices or cost figures belong in this repo.)
Engineering guardrails (non-negotiable)
- Human-UI-testing hard stop. When a change needs human UI/visual verification you cannot do yourself (rendering, layout, design, interaction, user-facing copy), STOP and explicitly flag it for human testing. Do not mark complete, approve, or merge until a human has verified it.
- Never bypass tests. Never use
git commit/push --no-verify; never add.only/skip/disable tests or lower coverage thresholds to make CI pass. Fix the root cause. CI required checks are mandatory for everyone (including admins) — status checks have no bypass.
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.
- 1mo ago First seen · 33 lines · 452 tokens per session scan A 0ac844893a69
constitution is a cursor rule published in the GitHub repository webhook-co/webhook (0 stars, last pushed 5d ago), licensed Apache-2.0. It adds 452 tokens to every session, about $0.0018 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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