simbad-catalog

simbad-catalog is a skill for Claude Code, Codex from agentlas-ai/agentlas-desktop. It costs 29 tokens per session (330 once invoked), scanned A, original, Apache-2.0.

A safe search workflow for SIMBAD, an astronomical object database, using a sky position and radius to return a fixed set of object and measurement fields.

In plain words
What is it for?
It helps find nearby catalogued astronomical objects and retain the request, response, and normalized-data records for later analysis.
Why use it?
It avoids treating a cone search as a complete survey, replacing missing measurements with zero, or inventing uncertainty values that were not returned.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps find nearby catalogued astronomical objects and retain the request, response, and normalized-data records for later analysis.

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Install with agentmods
npx agentmods add skills/agentlas-ai/agentlas-desktop/simbad-catalog
Install

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.

Any agent
npx skills add agentlas-ai/agentlas-desktop --skill simbad-catalog
Clone the repo
git clone --depth 1 https://github.com/agentlas-ai/agentlas-desktop

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for simbad-catalog

README.md
[![agentmods](https://agentmods.dev/badge/skills/agentlas-ai/agentlas-desktop/simbad-catalog/github.svg)](https://agentmods.dev/skills/agentlas-ai/agentlas-desktop/simbad-catalog)
Your own site
<a href="https://agentmods.dev/skills/agentlas-ai/agentlas-desktop/simbad-catalog"><img src="https://agentmods.dev/badge/skills/agentlas-ai/agentlas-desktop/simbad-catalog/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.

agentmods 80×15 button for simbad-catalog

Your own site · 80×15
<a href="https://agentmods.dev/skills/agentlas-ai/agentlas-desktop/simbad-catalog"><img src="https://agentmods.dev/badge/skills/agentlas-ai/agentlas-desktop/simbad-catalog.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 330 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.00330
Opus 5.5 $0.00012 $0.00132
Sonnet 5.5 $0.00006 $0.00066
Haiku 4.5 $0.00003 $0.00033

Measured 1mo ago against content hash 0a5bb4399c1e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

simbad-catalog 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.

plugins/agentlas-astronomy/skills/simbad-catalog/SKILL.md · 19 lines

What it actually says

  1. Convert the requested center to ICRS decimal degrees before calling the tool. Right ascension must be in [0, 360), declination in [-90, 90], and radius in [0.001, 10] degrees.
  2. Choose limit <= 500 and one response format. JSON is the default; CSV and TSV exist to prove replay-equivalent normalization.
  3. Call search_simbad_catalog. Do not write arbitrary ADQL or follow provider links.
  4. Treat spectralType, parallaxMas, proper motions, radial velocity, and redshift as nullable measurements. Never replace a missing value with zero.
  5. Preserve stableObjectId, provenance.sourceAuthority, provenance.request.requestSha256, provenance.response.rawSha256, and normalizedSha256 with downstream analysis.
  6. State that SIMBAD is an object database and that cone results are not a complete survey catalogue.
  7. The fixed ten-column search projection does not include uncertainty columns. Do not invent them; retrieve a separately evidenced measurement projection before using the astrometric-kinematics workflow.

Verification

Verify the returned schema is agentlas.astronomy.simbad-catalog/v1, the reported object count matches the rows, all coordinates remain within their physical bounds, and all three hashes are 64 lowercase hexadecimal characters.

Changes

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.

  1. 1mo ago First seen · 19 lines · 29 tokens per session scan A 0a5bb4399c1e

Subscribe to this mod's changes

simbad-catalog is a skill published in the GitHub repository agentlas-ai/agentlas-desktop (6 stars, last pushed yesterday), licensed Apache-2.0. It adds 29 tokens to every session and 330 once invoked, about $0.0001 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 2026-09-04.

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