Detect timing side channels in cryptographic implementations to prevent secret extraction attacks.
Automate repetitive workflows and reduce manual effort
Example: Generate reports, summarize documents, draft communications
Save 3-5 hours per week on routine tasks
Learn new skills, understand complex topics, get expert guidance
Example: Explain concepts, provide examples, suggest learning resources
Accelerate learning and skill development by 2x
Enhance output quality through reviews, suggestions, and refinements
Example: Review drafts, suggest improvements, catch errors
Improve work quality by 30-40% with less effort
Time estimate: 15-45 minutes depending on use case complexity
Prerequisites
Submit your Claude Code skill and start earning
epx add trailofbits/skills --skill constant-time-testingCompatible with
Supported agents
Covers four tool categories: formal verification (mathematical proofs), symbolic execution (concrete counterexamples), dynamic tracing (runtime secret tracking), and statistical testing (real-world timing measurement)
Provides workflow combining dudect for initial leak detection and timecop for pinpointing root causes, with formal verification for high-assurance audits
Identifies four c
AI-first code editor with Composer
Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versionconstant-time-testingExecute the skills CLI command in your project's root directory to begin installation:
epx add trailofbits/skills --skill constant-time-testingFetches constant-time-testing from trailofbits/skills and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
.cursor/skills/constant-time-testing
Restart Cursor to activate constant-time-testing. Access via /constant-time-testingin your agent's command palette.
Learn more:View source on GitHubSkills CLI docsAbout CursorWhat are agent skills?
Steps
Common Pitfalls
✓ Do
✗ Don't
💡 Pro Tips
✓ Use when
Use when skill capabilities match your task, clear ROI on time saved, and you can validate outputs. Best for repetitive tasks, learning, and quality improvement.
✗ Avoid when
Avoid when task requires deep expertise you can't validate, involves sensitive decisions, or when learning process is more valuable than speed of completion.
semgrep-rule-creator
trailofbits/skills · Productivity · same repo
dimensional-analysis
trailofbits/skills · Productivity · same repo
usability-testing
refoundai/lenny-skills · Testing · tag: testing
webapp-testing
skillcreatorai/ai-agent-skills · Testing · tag: testing
wordpress-penetration-testing
davila7/claude-code-templates · Testing · tag: testing
webapp-testing
composiohq/awesome-claude-skills · Testing · tag: testing
constant-time-testing is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
Solid pick for teams standardizing on skills: constant-time-testing is focused, and the summary matches what you get after install.
constant-time-testing is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
Registry listing for constant-time-testing matched our evaluation — installs cleanly and behaves as described in the markdown.
constant-time-testing fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.
Registry listing for constant-time-testing matched our evaluation — installs cleanly and behaves as described in the markdown.
Useful defaults in constant-time-testing — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
constant-time-testing reduced setup friction for our internal harness; good balance of opinion and flexibility.
I recommend constant-time-testing for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
constant-time-testing reduced setup friction for our internal harness; good balance of opinion and flexibility.
showing 1-10 of 58