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 jxoesneon/Ciel --skill json_yaml_toml_parsergit clone --depth 1 https://github.com/jxoesneon/CielWrote 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/jxoesneon/ciel/json_yaml_toml_parser)<a href="https://agentmods.dev/skills/jxoesneon/ciel/json_yaml_toml_parser"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/json_yaml_toml_parser/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/jxoesneon/ciel/json_yaml_toml_parser"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/json_yaml_toml_parser.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 | $0.00025 | $0.00296 |
| Opus 5 | $0.00013 | $0.00148 |
| Sonnet 5 | $0.00005 | $0.00059 |
| Haiku 4.5 | $0.00003 | $0.00030 |
Grade A, and why
json_yaml_toml_parser 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
json_yaml_toml_parser
Structured config parsers.
Operations
cfg.read(path)— detects format by extension.cfg.write(path, obj, format?)— preserves comments for YAML/TOML where possible.cfg.validate(obj, schema)— JSON Schema.cfg.transform(path, patch)— path-based updates; preserves shape.cfg.merge(a, b, strategy=deep|shallow).
I/O Contract
io_contract:
input: { op, path_or_obj, args }
output: { obj_or_ok }
idempotent: for_same_inputs
side_effects: ["fs?"]
Safety
- Schema validation before write when a schema is available.
- Refuses to write if the result would be malformed.
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 · 39 lines · 25 tokens per session scan A 69325f824311
json_yaml_toml_parser is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed yesterday), licensed Apache-2.0. It adds 25 tokens to every session and 296 once invoked, about $0.0001 per session on Opus 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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