Borrowing it
Nothing to install: this file belongs to cdknorow/coral. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/cdknorow/coral/main/.claude/commands/dev-screenshot.mdgit clone --depth 1 https://github.com/cdknorow/coralWrote 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/commands/cdknorow/coral/dev-screenshot)<a href="https://agentmods.dev/commands/cdknorow/coral/dev-screenshot"><img src="https://agentmods.dev/badge/commands/cdknorow/coral/dev-screenshot/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/commands/cdknorow/coral/dev-screenshot"><img src="https://agentmods.dev/badge/commands/cdknorow/coral/dev-screenshot.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 | $0.00000 | $0.00318 |
| Opus 5.5 | $0.00000 | $0.00127 |
| Sonnet 5.5 | $0.00000 | $0.00064 |
| Haiku 4.5 | $0.00000 | $0.00032 |
Grade A, and why
dev-screenshot scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Dev Screenshot: Build, Reload, and Capture UI
Use the dev screenshot script to iterate on UI changes. This builds the Go server with dev tags, starts it on an isolated port, opens the browser, and captures a screenshot for visual verification.
Steps
- Run the dev screenshot script:
PATH="/usr/local/go/bin:$PATH" ./scripts/dev-screenshot.sh
-
Wait for the script to complete (builds, starts server on port 8450, opens browser, takes screenshot)
-
Read the screenshot to verify visual changes:
Read /tmp/coral-screenshot.png
-
Compare against the reference design or previous screenshot. Note any issues.
-
When done iterating, stop the dev server:
kill $(lsof -ti :8450) 2>/dev/null
Details
- Port: 8450 (avoids conflicts with main app on 8420)
- Data dir: /tmp/.coral-dev/ (fully isolated, won't touch ~/.coral/)
- Build tags:
-tags dev(skips EULA and license) - Screenshot: Saved to /tmp/coral-screenshot.png
- Browser: Auto-opens and navigates to first available session
Usage Pattern for UI Iteration
- Make CSS/HTML changes
- Run
/dev-screenshotto rebuild and capture - Read the screenshot to verify
- Repeat until the UI matches the design
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.
- 1mo ago First seen · 40 lines · 0 tokens per session scan A d8bfb54f09f7
dev-screenshot is a command published in the GitHub repository cdknorow/coral (83 stars, last pushed 7d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 318 tokens. 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 2026-08-30.
Other commands, from other repositories
ng-red-team
Portable command prompt generated from skills/stress-testing-agent-changes/SKILL.md. Edit the skill, then run python tools/ng.py gen-commands; do not edit this file by hand.
usage-add
PitWay: Accumulate measured planning or qa token usage onto a milestone.
9_gofer_tests
Generate comprehensive test suites from four testing perspectives for a target component.
test
Generate tests for the specified code or feature.
tdd
TDD workflow - red-green-refactor per docs/methodology/tdd.md. Use when asked to '/tdd', 'TDD workflow', 'red-green-refactor', 'test-first development', 'write the failing test first'.
test
Write tests before implementation using Red-Green-Refactor.