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.
npx skills add CALLE-AI/awesome-phone-call-agents --skill ground-truth-gategit clone --depth 1 https://github.com/CALLE-AI/awesome-phone-call-agentsWrote 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/skills/calle-ai/awesome-phone-call-agents/ground-truth-gate)<a href="https://agentmods.dev/skills/calle-ai/awesome-phone-call-agents/ground-truth-gate"><img src="https://agentmods.dev/badge/skills/calle-ai/awesome-phone-call-agents/ground-truth-gate/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/skills/calle-ai/awesome-phone-call-agents/ground-truth-gate"><img src="https://agentmods.dev/badge/skills/calle-ai/awesome-phone-call-agents/ground-truth-gate.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 | $0.00091 | $0.03101 |
| Opus 5.5 | $0.00036 | $0.01240 |
| Sonnet 5.5 | $0.00018 | $0.00620 |
| Haiku 4.5 | $0.00009 | $0.00310 |
Grade A, and why
ground-truth-gate 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.
How it starts
The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ground Truth Gate
Overview
Some facts are not on the web. They live in one human's head, behind a phone number: whether the part is on the shelf at this branch, whether the unit is still available at the advertised price, whether the slot is really open today.
An agent asked for such a fact has three options, and the first two both fail the user. It can assert from stale text, which produces a confident wrong answer. It can hedge and tell the user to go call, which hands the work straight back. The third option is to gate the claim: answer provisionally now, place one disclosed call to the party that actually knows, and correct the record when the call lands.
Core principle: absence of evidence is never evidence. A claim is released as fact only on positive evidence from an authoritative source, and only when the abstention gate agrees.
When To Use
- The agent is about to state a physical-world fact its sources cannot currently support, and it has not yet decided whether calling is justified.
- The evidence is stale, or its scope does not match the question asked. Text saying an item is "in stock at Northgate Appliance" does not answer "in stock at the Bellevue branch today".
- A wrong assertion is expensive and asymmetric: a wasted trip, a wired deposit, a missed deadline.
- The authoritative party is known and reachable by phone, and the user asked for the answer.
When Not To Use
- The decision to call is already made. Use
verify-by-phone, which owns disclosed verification calls and the calibrated abstention this skill defers to. - The fact is cheap to be wrong about, or a real API answers it authoritatively. Both are
discloseoransweroutcomes here, not calls. - No authoritative phone contact was supplied by the user. Guessing a number is a blocker, never a default.
- The user has not asked for the answer. This skill never places a call to satisfy the agent's own curiosity.
- The question is time-critical to someone's safety. An emergency is not a claim to triage.
What ships with it
11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/sample-claim.json 547 B
- assets/sample-result.json 232 B
- references/calle-api.md 5.4 KB
- references/composition.md 6.4 KB
- references/examples.md 7.4 KB
- references/safety.md 5.9 KB
- scripts/demo_card.py 3.9 KB runs code
- scripts/gate.py 37 KB runs code
- scripts/mock_calle.py 9.3 KB runs code
- scripts/place_call.py 20 KB runs code
- scripts/self_test.py 24 KB runs code
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 · 170 lines · 91 tokens per session scan A 53c5ccb107eb
ground-truth-gate is a skill published in the GitHub repository CALLE-AI/awesome-phone-call-agents (109 stars, last pushed yesterday), licensed MIT. It adds 91 tokens to every session and 3,101 once invoked, about $0.0004 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 2026-09-15.
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