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/ashishpatill/tell-proofWrote 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/ashishpatill/tell-proof/tell-schema-contracts)<a href="https://agentmods.dev/rules/ashishpatill/tell-proof/tell-schema-contracts"><img src="https://agentmods.dev/badge/rules/ashishpatill/tell-proof/tell-schema-contracts/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/ashishpatill/tell-proof/tell-schema-contracts"><img src="https://agentmods.dev/badge/rules/ashishpatill/tell-proof/tell-schema-contracts.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 | $0.00000 | $0.00199 |
| Opus 5 | $0.00000 | $0.00100 |
| Sonnet 5 | $0.00000 | $0.00040 |
| Haiku 4.5 | $0.00000 | $0.00020 |
Grade A, and why
tell-schema-contracts 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 8d 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
Schema contract rules
@tell/schemais the single source of truth for cross-package data shapes.- Edit schemas before changing capture, detectors, taste, redesign, MCP, or web API code.
- Export inferred TS types from zod; consumers import types, never duplicate shapes.
- Parse at every boundary: MCP tools, API routes, file reads, model JSON responses.
- Schema changes are a merge gate — freeze before parallel subagent work.
- Prefer additive changes; breaking renames require updating all packages in one pass.
Core types
CapturePayload, DesignFingerprint, Finding, TasteVerdict, ArtDirection, RedesignProposal, TellReport
DoD
pnpm -F @tell/schema buildpasses- Downstream packages typecheck without loose
anyat boundaries
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.
- 8d ago First seen · 24 lines · 0 tokens per session scan A 81ebeaecec15
tell-schema-contracts is a cursor rule published in the GitHub repository ashishpatill/tell-proof (1 stars, last pushed 13d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 199 tokens. 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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