MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Analyze system health, surface patterns, manage improvement suggestions.
Install Observatory
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install juanandresgs/claude-ctrl observatory --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/observatory .claude/skills/observatory && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .claude/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatoryType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install juanandresgs/claude-ctrl observatory --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/observatory .agents/skills/observatory && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .agents/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install juanandresgs/claude-ctrl observatory --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/observatory .cursor/skills/observatory && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .cursor/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/juanandresgs/claude-ctrl.git --path skills/observatory--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install juanandresgs/claude-ctrl observatory --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/observatory .gemini/skills/observatory && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .gemini/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install juanandresgs/claude-ctrl observatoryInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/observatory .github/skills/observatory && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .github/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add juanandresgs/claude-ctrl --skill observatory -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install juanandresgs/claude-ctrl observatory --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juanandresgs/claude-ctrl.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/observatory .opencode/skills/observatory && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "observatory" agent skill from https://github.com/juanandresgs/claude-ctrl/tree/main/skills/observatory into .opencode/skills/observatory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "observatory", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
observatory- GitHub stars
- 193
- Token cost
- ~1.9k tokens
- SKILL.md length
- 692 words
- Files
- 2
- Skills in repo
- 10
- Repo updated
- First seen
- Licence
- None found
At a glance
Analyze system health, surface patterns, manage improvement suggestions.
- Works in 5 steps: Gather Data → Present Findings → Interactive Suggestion Management (run… → …
- Agent Workflows work in your project
- SKILL.md covers Subcommands, Phase 1: Gather Data, Phase 2: Present Findings and Phase 3: Interactive…, plus 4 more sections
- Calls python3 and bash
What it does
Observatory is an agent skill from juanandresgs/claude-ctrl. Analyze system health, surface patterns, manage improvement suggestions. Self-improvement flywheel for the hook/agent/dispatch system.
Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `instructions.md`).
It sits in Agent Workflows. The repository describes itself as: DEPRECATED / UNMAINTAINED — historical reference only. Do not install or rely on this project.
When your agent uses it
- Agent Workflows work in your project
Example prompts
- “/observatory”
Requirements
- Python 3
- Pre-approved tools (allowed-tools): Bash, Read, Write, AskUserQuestion
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Gather Data
- Present Findings
- Interactive Suggestion Management (run and suggest modes only)
- Propose Suggestions from Patterns (run mode only)
- Convergence Check (converge mode)
What it can do on your machine
Read from SKILL.md and the folder at commit dfbdd82. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
BashReadWriteAskUserQuestion
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
python3bash
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Observatory loads about 1.9k tokens when it runs. Until then it costs about 37 tokens; SKILL.md has 692 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Bash, Read, Write, AskUserQuestion
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 692 words (~1,950 tokens).
“Analyze the hook/agent/dispatch system's operational health, surface patterns, and manage the improvement suggestion lifecycle. The observatory is the system's honest self-exam — it tells you what's actually happening, not what should be happening.”
- name
- observatory
- allowed-tools
- Bash, Read, Write, AskUserQuestion
- argument-hint
- [run | status | suggest | converge | report]
- context
- fork
- agent
- general-purpose
Files
SKILL.md and 1 other file in skills/observatory of juanandresgs/claude-ctrl.
- SKILL.md
- instructions.md
Open the folder on GitHubat commit dfbdd82
Compare with similar skills
Observatory next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Observatory this skilljuanandresgs/claude-ctrl | 193 | — | ~1.9k | Automated safety check: Notes | None | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 36 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 297k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Skill CreatorAzure/azqr | 796 | 89 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
- Official
Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
Using Superpowers
farm-fe/farm
A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
Executing Plans Inline
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
- Official
Skill Creator
Azure/azqr
Create new skills, modify and improve existing skills, and measure skill performance.
- Official
Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
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Decide
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Context Preservation
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Reckoning
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Related
Categories
Questions about Observatory
What does Observatory do?
Analyze system health, surface patterns, manage improvement suggestions. Observatory is an agent skill from juanandresgs/claude-ctrl. Analyze system health, surface patterns, manage improvement suggestions.
When should I use Observatory?
Observatory fits situations like: agent Workflows work in your project.
How do I install Observatory in Claude Code?
Run `npx skills add juanandresgs/claude-ctrl --skill observatory -a claude-code`. Or copy the skill folder (skills/observatory in juanandresgs/claude-ctrl) into .claude/skills/observatory in your project. Claude Code loads it when a task matches its description.
How do I install Observatory in Codex?
Run `npx skills add juanandresgs/claude-ctrl --skill observatory -a codex`. Or copy the skill folder (skills/observatory in juanandresgs/claude-ctrl) into .agents/skills/observatory in your project. Codex loads it when a task matches its description.
Can I use Observatory in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add juanandresgs/claude-ctrl --skill observatory -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/observatory, .gemini/skills/observatory, .github/skills/observatory and .opencode/skills/observatory in your project.
What does Observatory need to run?
Going by SKILL.md and its folder, Observatory needs the command-line tools its instructions call (python3 and bash). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Bash, Read, Write, AskUserQuestion.
Does Observatory access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Observatory safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Observatory use?
No licence was found for Observatory or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Observatory use?
About 1.9k tokens (SKILL.md is roughly 7.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Observatory?
Skills that share tags, products or a category with Observatory: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 297k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Observatory?
juanandresgs (a GitHub user) maintains it in juanandresgs/claude-ctrl, which has 193 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on August 7, 2026.
Source: juanandresgs/claude-ctrl on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.