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 modiqo/skillspec --skill skillspec_backedgit clone --depth 1 https://github.com/modiqo/skillspecWrote 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/modiqo/skillspec/skillspec_backed)<a href="https://agentmods.dev/skills/modiqo/skillspec/skillspec_backed"><img src="https://agentmods.dev/badge/skills/modiqo/skillspec/skillspec_backed/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/modiqo/skillspec/skillspec_backed"><img src="https://agentmods.dev/badge/skills/modiqo/skillspec/skillspec_backed.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 | $0.00052 | $0.00436 |
| Opus 5 | $0.00026 | $0.00218 |
| Sonnet 5 | $0.00010 | $0.00087 |
| Haiku 4.5 | $0.00005 | $0.00044 |
Grade C, and why
demo-browser-research scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://skillspec.sh/install.sh | sh Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://skillspec.sh/install.sh | sh What it actually says
browser research
Demonstrates how a prose browser skill becomes a tested SkillSpec behavior contract.
Use the directory that contains this loaded SKILL.md as <skill_dir>.
The SkillSpec contract is <skill_dir>/skill.spec.yml; do not assume the user's current working directory contains the spec.
Start the SkillSpec guide with the user's task:
skillspec run-loop <skill_dir>/skill.spec.yml --input '<user task>' --trace-dir "${PWD}/.skillspec/traces" --guide agent
Resume an existing guided run:
skillspec run-loop <skill_dir>/skill.spec.yml --resume <run_dir> --guide agent
Follow the printed current gate. The selected route, matched rules, forbids, allowed commands, open requirements, resume command, and end proof from the CLI guide are authoritative.
Use skillspec query and skillspec refs only for handles named by the guide. Do not read the full spec unless the guide, a blocker, or the user asks for it.
Before the final response, follow the guide's end anchor: record final-response evidence, run the printed skillspec trace align ... --summary command as the completion summary source, and report result, evidence, alignment summary, token usage, selected route, and run directory.
If the skillspec CLI is not installed, report that this skill requires SkillSpec and ask the user to install it before continuing:
curl -fsSL https://skillspec.sh/install.sh | sh
# or, with Rust installed:
cargo install skillspec
If the user declines or installation is impossible, read <skill_dir>/skill.spec.yml directly and manually follow the same route, rule, phase, dependency, forbid, proof, and completion contract. Report that CLI guidance was unavailable and alignment proof is partial.
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.
- 9d ago First seen · 36 lines · 52 tokens per session scan C 8bda4e2124f3
demo-browser-research is a skill published in the GitHub repository modiqo/skillspec (740 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 52 tokens to every session and 436 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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