Common Architecture Decisions
macalbert/envilder
Index of Architecture Decision Records (ADRs) for cross-cutting technical decisions.
Outsider-perspective end-to-end review of a plan, PR, or code change.
Install Scrutinize
$ npx skills add thananon/9arm-skills --skill scrutinize -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thananon/9arm-skills scrutinize --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/thananon/9arm-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/engineering/scrutinize .claude/skills/scrutinize && 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 "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .claude/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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/thananon/9arm-skills/tree/main/skills/engineering/scrutinizeType 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 thananon/9arm-skills --skill scrutinize -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thananon/9arm-skills scrutinize --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/engineering/scrutinize .agents/skills/scrutinize && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .agents/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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 thananon/9arm-skills --skill scrutinize -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thananon/9arm-skills scrutinize --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/engineering/scrutinize .cursor/skills/scrutinize && 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 "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .cursor/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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/thananon/9arm-skills.git --path skills/engineering/scrutinize--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 thananon/9arm-skills --skill scrutinize -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thananon/9arm-skills scrutinize --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/engineering/scrutinize .gemini/skills/scrutinize && 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 "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .gemini/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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 thananon/9arm-skills scrutinizeInstalls 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 thananon/9arm-skills --skill scrutinize -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/engineering/scrutinize .github/skills/scrutinize && 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 "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .github/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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 thananon/9arm-skills --skill scrutinize -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thananon/9arm-skills scrutinize --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thananon/9arm-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/engineering/scrutinize .opencode/skills/scrutinize && 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 "scrutinize" agent skill from https://github.com/thananon/9arm-skills/tree/main/skills/engineering/scrutinize into .opencode/skills/scrutinize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scrutinize", 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
scrutinize- GitHub stars
- 3.2k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 638 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- None found
At a glance
Outsider-perspective end-to-end review of a plan, PR, or code change.
- Works in 4 steps: Intent — what is this actually trying to… → Trace — walk the actual code path → Verify — does it actually do what it… → …
- /scrutinize and proactively whenever the user asks to review
- SKILL.md covers Operating stance, Workflow and Operating rules
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Scrutinize is an agent skill from thananon/9arm-skills. Outsider-perspective end-to-end review of a plan, PR, or code change. First questions intent and whether a simpler/more elegant approach would achieve the same goal, then traces the actual code path (not just the diff) to verify the change does what it claims. Output is concise, actionable, and every call carries its rationale. Trigger on /scrutinize and proactively whenever the user asks to review, audit, sanity-check, or get a second opinion on a plan, PR, diff, design doc, or proposed code change.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Architecture decision records and End-to-end testing.
When your agent uses it
- /scrutinize and proactively whenever the user asks to review
- Get a second opinion on a plan
- Proposed code change
Example prompts
- “/scrutinize”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Intent — what is this actually trying to do?
- Trace — walk the actual code path
- Verify — does it actually do what it claims?
- Report
What it can do on your machine
Read from SKILL.md and the folder at commit a1fc303. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
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
Scrutinize loads about 1.2k tokens when it runs. Until then it costs about 129 tokens; SKILL.md has 638 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 passed
The automated check found no risky patterns in SKILL.md.
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 638 words (~1,164 tokens).
“Stand outside the change and ask whether it should exist at all, then verify it actually does what it claims end-to-end.”
- name
- scrutinize
Files
Just SKILL.md in skills/engineering/scrutinize of thananon/9arm-skills.
Open the folder on GitHubat commit a1fc303
Compare with similar skills
Scrutinize 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 |
|---|---|---|---|---|---|---|
| Scrutinize this skillthananon/9arm-skills | 3.2k | — | ~1.2k | Automated safety check: Pass | None | |
| Common Architecture Decisionsmacalbert/envilder | 138 | — | ~1.3k | Automated safety check: Pass | MIT | |
| Long Task Atssuriyel/longtaskforagent | 177 | — | ~3.7k | Automated safety check: Pass | None | |
| Recipe Add Integration Testsshinpr/claude-code-workflows | 693 | — | ~2k | Automated safety check: Pass | MIT | |
| PR Design DocOpenHands/OpenHands | 90k | — | ~2.4k | Automated safety check: Pass | MIT | |
| Cto AdvisorIbrahim-3d/orchestrator-supaconductor | 381 | 4 repos | ~2.4k | Automated safety check: Pass | MIT |
Similar skills
Long Task Ats
suriyel/longtaskforagent
A skill your agent uses when design doc exists but no ATS doc and no feature-list.json - generate a global Acceptance Test Strategy mapping every requirement to acceptance scenarios with category…
Recipe Add Integration Tests
shinpr/claude-code-workflows
Add integration/E2E tests to existing codebase using Design Docs
PR Design Doc
OpenHands/OpenHands
For a non-trivial pull request, write a self-contained HTML design doc under the temporary .pr/ directory and link a visibility-appropriate preview in the PR description, so maintainers grasp the…
Cto Advisor
Ibrahim-3d/orchestrator-supaconductor
Technical leadership guidance for engineering teams, architecture decisions, and technology strategy.
Architecture Decision
Donchitos/Claude-Code-Game-Studios
Create an ADR documenting a technical decision: context, alternatives considered, consequences.
More from thananon/9arm-skills
Management Talk
thananon/9arm-skills
Rewrite engineer-to-engineer content for engineering-org leadership (VPs, directors, PMs, release managers, execs in an engineering-savvy company) and shape it for the channel it is going to — JIRA…
Post Mortem
thananon/9arm-skills
Write the canonical engineering record of a fixed bug — root cause, mechanism, fix, validation, and how it slipped through.
Qwen Agent
thananon/9arm-skills
Delegate menial, well-scoped coding tasks to a cheap Qwen-backed subagent via the claude-9arm command instead of burning Claude tokens/quota.
Debug Mantra
thananon/9arm-skills
Four-mantra debugging discipline — reproduce, trace the fail path, falsify the hypothesis, cross-reference every breadcrumb.
Qwenchance
thananon/9arm-skills
Keeps a long Claude Code task on-track — breaks out of looping/circular thinking, watches the context budget, bounds internal reasoning, and triggers a clean handoff before the window fills.
Related
Categories
Questions about Scrutinize
What does Scrutinize do?
Outsider-perspective end-to-end review of a plan, PR, or code change. Scrutinize is an agent skill from thananon/9arm-skills. Outsider-perspective end-to-end review of a plan, PR, or code change.
When should I use Scrutinize?
Scrutinize fits situations like: /scrutinize and proactively whenever the user asks to review; get a second opinion on a plan; proposed code change.
How do I install Scrutinize in Claude Code?
Run `npx skills add thananon/9arm-skills --skill scrutinize -a claude-code`. Or copy the skill folder (skills/engineering/scrutinize in thananon/9arm-skills) into .claude/skills/scrutinize in your project. Claude Code loads it when a task matches its description.
How do I install Scrutinize in Codex?
Run `npx skills add thananon/9arm-skills --skill scrutinize -a codex`. Or copy the skill folder (skills/engineering/scrutinize in thananon/9arm-skills) into .agents/skills/scrutinize in your project. Codex loads it when a task matches its description.
Can I use Scrutinize 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 thananon/9arm-skills --skill scrutinize -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/scrutinize, .gemini/skills/scrutinize, .github/skills/scrutinize and .opencode/skills/scrutinize in your project.
What does Scrutinize need to run?
SKILL.md names no scripts, command-line tools or credentials: Scrutinize is instructions for the agent only.
Does Scrutinize 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 Scrutinize safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Scrutinize use?
No licence was found for Scrutinize or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Scrutinize use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Scrutinize?
Skills that share tags, products or a category with Scrutinize: Common Architecture Decisions (macalbert/envilder, 138 stars), Long Task Ats (suriyel/longtaskforagent, 177 stars), Recipe Add Integration Tests (shinpr/claude-code-workflows, 693 stars) and PR Design Doc (OpenHands/OpenHands, 90k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Scrutinize?
thananon (a GitHub user) maintains it in thananon/9arm-skills, which has 3,210 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on June 14, 2026.
Source: thananon/9arm-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.