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CASDA-MCP: Skill for Cursor

.cursor/skills/casda-safe-archive-access/SKILL.md

casda-safe-archive-access is a skill for Cursor from jbwod/CASDA-MCP. It costs 51 tokens per session (600 once invoked), scanned A, original, BSD-3-Clause.

Safety instructions for using the CASDA astronomy data archive through its MCP server.

In plain words
What is it for?
Searching and inspecting CASDA data, validating advanced queries, checking access status, and handling staging or downloads only when enabled.
Why use it?
They reduce the risk of selecting incorrect products, inventing archive URLs, or performing blocked downloads and administrative actions.

Skill for Cursor

Written for Cursor: installed under .cursor/.

This is jbwod/CASDA-MCP's own configuration. It tells Cursor how to work on CASDA-MCP itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CASDA-MCP configures →

not rated 0repo 1mo ago A scan 51 tokens original BSD-3-Clause
View source ↗ jbwod/CASDA-MCP
Reuse

Borrowing it

Nothing to install: this file belongs to jbwod/CASDA-MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/jbwod/CASDA-MCP/master/.cursor/skills/casda-safe-archive-access/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/jbwod/CASDA-MCP

Made for: Cursor.

Wrote this? Show the measurements

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README.md
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Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 600 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 $0.00051 $0.00600
Opus 5 $0.00026 $0.00300
Sonnet 5 $0.00010 $0.00120
Haiku 4.5 $0.00005 $0.00060

Measured 10d ago against content hash 3a6213614688, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

casda-safe-archive-access 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 10d 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.

.cursor/skills/casda-safe-archive-access/SKILL.md · 29 lines

How it starts

The opening of the file, as written. The whole thing — 29 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CASDA safe archive access

Rules

  1. Use only the registered CASDA MCP tools and resources. Do not invent raw TAP/SODA URLs, shell commands, or filesystem browsing tools.
  2. Resolve astronomical names to ICRS coordinates outside this MCP (or use an exact CASDA source_name). This server does not resolve names.
  3. Search and inspect before selecting explicit product identifiers. Never stage or download from guessed IDs.
  4. Staging and downloads are disabled by default. Treat STAGING_DISABLED / DOWNLOADS_DISABLED as configuration, not archive failures.
  5. Advanced ADQL (casda_tap_query / casda_submit_tap_query) requires CASDA_ENABLE_ADVANCED_ADQL=true. Treat ADVANCED_ADQL_DISABLED as configuration. Prefer allowlisted discovery tools when they suffice; validate with casda_validate_adql first.
  6. Read every tool response's structured error (via protocol isError) and provenance. Do not claim access CASDA has not confirmed (access_state, authorisation_state).
  7. Do not scrape or automate Data Access Portal legal-acceptance, administrative, or interactive UI flows. Use casda_get_dap_navigation for deep links and structured unsupported_actions. Never auto-accept licences, assign roles, deposit Level 7 data, release observations, mint DOIs, or launch CARTA.
  8. Discovery tools are available: VOSI/TAP_SCHEMA, SIA/SCS/SSA, projects/collections, casda_list_events, casda_resolve_collection_doi (public citation read), and staging via casda_stage_products / casda_stage_pawsey / cutout / spectrum when enabled. Pawsey responses include human-gate warnings.
  9. Prefer prompts such as find-and-inspect-products, query-tables, run-adql, query-catalogue, make-cutout, stage-and-download, dap-navigate, and build-reproducible-selection. Read casda://skills/{skill_name} and casda://dap/navigation when needed.

Units and identifiers

  • Coordinates: ICRS degrees (ra_deg in [0, 360), dec_deg in [-90, 90]).
  • Frequencies: hertz (ObsCore search); SODA BAND uses wavelength in metres.
  • Dates: ISO 8601 overlapping observation windows.
  • Product IDs: exact CASDA obs_publisher_did values returned by search or get tools.

Read the full file on GitHub · 29 lines

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. 10d ago First seen · 29 lines · 51 tokens per session scan A 3a6213614688

Subscribe to this mod's changes

casda-safe-archive-access is a skill published in the GitHub repository jbwod/CASDA-MCP (0 stars, last pushed 1mo ago), licensed BSD-3-Clause. It adds 51 tokens to every session and 600 once invoked, about $0.0003 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.

Scientificcasdamcp-server
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