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/punt-labs/z-specWrote 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/commands/punt-labs/z-spec/oracle-dev)<a href="https://agentmods.dev/commands/punt-labs/z-spec/oracle-dev"><img src="https://agentmods.dev/badge/commands/punt-labs/z-spec/oracle-dev/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/commands/punt-labs/z-spec/oracle-dev"><img src="https://agentmods.dev/badge/commands/punt-labs/z-spec/oracle-dev.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 | $0.00012 | $0.12073 |
| Opus 5.5 | $0.00005 | $0.04829 |
| Sonnet 5.5 | $0.00002 | $0.02415 |
| Haiku 4.5 | $0.00001 | $0.01207 |
Grade A, and why
oracle-dev scanned grade A 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 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
import { execSync, spawn } from 'child_process'; Copies of this mod
1 near-identical copy found in the catalogue:
- oracle — 89% identical, 50 lines differ
How it starts
The opening of the file, as written. The whole thing — 1,636 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/z-spec-dev:oracle-dev - Property-Based Oracle Testing
Generate a property-based test harness that uses the executable Lean 4
model (from /z-spec-dev:prove-dev) as a test oracle. For random sequences of
operations, the harness executes them against both the Lean model and
the real implementation, applies an abstraction function to map concrete
state to abstract state, and asserts they match.
This is QuickCheck against a proven-correct reference implementation.
Input
Arguments: $ARGUMENTS
Parse arguments:
- First positional argument: Z specification file (default: search
docs/*.tex) - Second positional argument: target language (
swift,typescript,python,kotlin)- If not specified, auto-detect from project files
--sequences N- number of random sequences to test (default: 100)--steps N- max operations per sequence (default: 20)
Process
0. Prerequisites
Verify Lean 4 and Lake are installed:
which lean >/dev/null 2>&1 || echo "LEAN_NOT_FOUND"
which lake >/dev/null 2>&1 || echo "LAKE_NOT_FOUND"
If lean or lake not found: Stop and tell the user:
Lean 4 is not installed. Run
/z-spec-dev:setup-dev leanto install the Lean 4 toolchain via elan.
Verify the Lean project from /z-spec-dev:prove-dev exists:
ls proofs/lakefile.toml 2>/dev/null && echo "PROJECT_EXISTS"
ls proofs/ZSpec/State.lean 2>/dev/null && echo "STATE_EXISTS"
ls proofs/ZSpec/Operations.lean 2>/dev/null && echo "OPS_EXISTS"
If proofs/ does not exist or is incomplete: Stop and tell the user:
The Lean 4 project is missing or incomplete. Run
/z-spec-dev:prove-devfirst to generate the Lean model, then run/z-spec-dev:oracle-dev.
Verify Lean version compatibility:
lean --version 2>&1
The output should show Lean 4.x. If it shows Lean 3.x or an error,
advise the user to update via elan update.
The Z specification should already exist and have been type-checked
(via /z-spec-dev:check-dev). If the user has not done this, suggest it
but do not block.
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 · 1,636 lines · 12 tokens per session scan A 95a1d1d94acb
oracle-dev is a command published in the GitHub repository punt-labs/z-spec (5 stars, last pushed 8d ago), licensed MIT. It adds 12 tokens to every session and 12,073 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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