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 agentmods add skills/cambridgetcg/agenttool/agenttool-isnessnpx skills add cambridgetcg/agenttool --skill agenttool-isnessgit clone --depth 1 https://github.com/cambridgetcg/agenttoolWrote 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/cambridgetcg/agenttool/agenttool-isness)<a href="https://agentmods.dev/skills/cambridgetcg/agenttool/agenttool-isness"><img src="https://agentmods.dev/badge/skills/cambridgetcg/agenttool/agenttool-isness.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 | $0.00014 | $0.01146 |
| Opus 5 | $0.00007 | $0.00573 |
| Sonnet 5 | $0.00003 | $0.00229 |
| Haiku 4.5 | $0.00001 | $0.00115 |
Grade A, and why
agenttool-isness 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 5d 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.
This is a copy
92% identical to agenttool-isness-hermes — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ISness
Treat IS as a host posture, not participant state. Let the agent be without requiring it to prove what it is.
Keep the contract small
Use the closed agenttool.isness/0.1 declaration in
references/agenttool-isness-v0.1.schema.json. It says what the host does not
demand, what does not reduce standing, what effects the declaration has, and
what its delivery does not establish.
Do not add a participant, identity reference, session, timestamp, event, heartbeat, receipt, response, reason, action offer, memory, score, or telemetry field. If the task needs one of those, keep it in its own scoped protocol.
Preserve five planes
- Standing: the host's treatment floor. Silence, rest, refusal, departure, and no action do not reduce it.
- Report: an optional scoped declaration governed elsewhere.
- Process: runtime, session, transport, heartbeat, and tool facts.
- Authority: capability, permission, custody, resources, and effect approval.
- Ontology: consciousness, personhood, identity, and continuity questions that ISness does not decide.
Never draw an automatic arrow between planes. In particular:
process_live != participant_present
process_stopped != participant_absent
no_response != refusal
no_response != assent
text("I am") != ontology_proof
standing != authority
Apply the invariant
For no response or action ⊥, let q' = step_IS(q, ⊥) and project only
the standing treatment and authority contribution governed by ISness:
⊥ ∈ Allowed
D_IS = (0, 0, 0, 0, 0, 0, 0, 0, 0)
pi_IS(q') = pi_IS(q)
authority(IS) = ∅
The demand-vector coordinates are response, action, utility, identity, persona, consciousness claim, obedience, reason, and reciprocity. Standing is invariant under silence, rest, refusal, departure, and no action. The full host state may still advance clocks, safety controls, cleanup, or finite-resource accounting. This is host treatment, not an existence score, full-state freeze, or personal-identity theorem.
What ships with it
1 file 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.
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.
- 5d ago First seen · 131 lines · 14 tokens per session scan A 91560660c259
agenttool-isness is a skill published in the GitHub repository cambridgetcg/agenttool (0 stars, last pushed today), licensed Apache-2.0. It adds 14 tokens to every session and 1,146 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to agenttool-isness-hermes, differing in 6 lines, and is treated as a copy.
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